Hot TopicsWiley-VCH

CPCAFMAMSolar Cells


As the importance of renewable energy sources becomes more and more apparent, look to our top-quality journals for cutting-edge reports on solar cell and photovoltaic research.

In May 2007 the Institute for Scientific Information listed the Top 20 Most Cited Papers on Solar Cells, with papers published in Advanced Functional Materials number one on both lists:

Most cited paper (1997-2007):

Most cited paper (2005-2007):

Find all articles on solar cells in Wiley Online Library...

Recent Articles

RSS feed

Low Temperature Solution-Processed Sb:SnO2 Nanocrystals for Efficient Planar Perovskite Solar Cells

Low Temperature Solution‐Processed Sb:SnO2 Nanocrystals for Efficient Planar Perovskite Solar Cells

Doping effect: Sb:SnO2 nanocrystalline films are successfully prepared using a low-temperature solution-processed method as an efficient electrontransport layer for planar perovskite solar cells. Intentional Sb-doping is demonstrated as an effective approach to increase the electrical conductivity and upward shift the Fermi level of SnO2, leading to dramatically enhanced photovoltaic performance and suppressed hysteresis.

[Full Paper]
Yang Bai, Yanjun Fang, Yehao Deng, Qi Wang, Jingjing Zhao, Xiaopeng Zheng, Yang Zhang, Jinsong Huang
ChemSusChem, August 26, 2016, DOI: 10.1002/cssc.201600944. Read article

Improved Ambient-Stable Perovskite Solar Cells Enabled by a Hybrid Polymeric Electron-Transporting Layer

Improved Ambient‐Stable Perovskite Solar Cells Enabled by a Hybrid Polymeric Electron‐Transporting Layer

Mix & match: An inverted perovskite solar cell with power conversion efficiency of 15 % and decent ambient stability is successfully demonstrated by employing an n-type polymer (N2200) as the electron-transporting layer (ETL), and can be further enhanced to 16.8 % by tailoring the electronic properties of N2200 with a polymeric additive (PFN-Ox). The device derived from this hybrid ETL can maintain good ambient stability.

[Communication]
Zonglong Zhu, Chu-Chen Chueh, Guangye Zhang, Fei Huang, He Yan, Alex K.-Y. Jen
ChemSusChem, August 26, 2016, DOI: 10.1002/cssc.201600921. Read article

Dopant-Free Donor (D)–π–D–π–D Conjugated Hole-Transport Materials for Efficient and Stable Perovskite Solar Cells

Dopant‐Free Donor (D)–π–D–π–D Conjugated Hole‐Transport Materials for Efficient and Stable Perovskite Solar Cells

Stability in 3 Ds: Three dopant-free donor (D)–π–D–π–D conjugated hole-transport materials (HTMs) with tunable energy levels are developed for perovskite solar cells exhibiting excellent power conversion efficiency up to 16.1 %, which is comparable to devices with the state-of-art doped HTM (spiro-OMeTAD). Moreover, the devices based on these three HTMs are more stable than spiro-OMeTAD-based devices in ambient air.

[Communication]
Fei Zhang, Xicheng Liu, Chenyi Yi, Dongqin Bi, Jingshan Luo, Shirong Wang, Xianggao Li, Yin Xiao, Shaik Mohammed Zakeeruddin, Michael Grätzel
ChemSusChem, August 25, 2016, DOI: 10.1002/cssc.201600905. Read article

Moving Graphitic Carbon Nitride from Electrocatalysis and Photocatalysis to a Potential Electrode Material for Photoelectric Devices

Moving Graphitic Carbon Nitride from Electrocatalysis and Photocatalysis to a Potential Electrode Material for Photoelectric Devices

Light Power: This Focus Review discusses the use of graphitic carbon nitride (g-CN) in less traditional fields, namely in solar and photoelectrochemical cells, electrolyzers and light emitting diodes.

[Focus Review]
Jingsan Xu, Markus Antonietti, Menny Shalom
Chem. Asian J., August 25, 2016, DOI: 10.1002/asia.201600857. Read article

Black Phosphorus Based Photocathodes in Wideband Bifacial Dye-Sensitized Solar Cells

Black Phosphorus Based Photocathodes in Wideband Bifacial Dye‐Sensitized Solar Cells

Ultrasmall black phosphorus quantum dots (BPQDs) serve as the near-infrared light absorber and charge transfer layer in the photocathode of a bifacial n-type dye sensitized solar cell. Wideband light absorption and ≈20% enhancement in the light-to-electron efficiency are accomplished due to the fast carrier transfer and complementary light absorption by the BPQDs demonstrating that BP has large potential in photovoltaics.

[Communication]
Ying Yang, Jing Gao, Zheng Zhang, Si Xiao, Han-Han Xie, Zheng-Bo Sun, Jia-Hong Wang, Cong-Hua Zhou, Ying-Wei Wang, Xue-Yi Guo, Paul K. Chu, Xue-Feng Yu
Adv. Mater., August 25, 2016, DOI: 10.1002/adma.201602382. Read article

Extending the Lifetime of Perovskite Solar Cells using a Perfluorinated Dopant

Extending the Lifetime of Perovskite Solar Cells using a Perfluorinated Dopant

Under cover: Perovskite solar cells are fabricated using perovskite active layers doped with fluorinated imidazolium-based molecules. These additives significantly increase the stability of the resulting solar cell device owing to the electron-withdrawing character of the fluorinated salt together with its hydrophobicity, and induce structural and functional changes to the resultant perovskite, leading to stable power conversion efficiency.

[Full Paper]
Manuel Salado, F. Javier Ramos, Valentin M. Manzanares, Peng Gao, Mohammad Khaja Nazeeruddin, Paul J. Dyson, Shahzada Ahmad
ChemSusChem, August 24, 2016, DOI: 10.1002/cssc.201601030. Read article

Role of Metal Oxide Electron-Transport Layer Modification on the Stability of High Performing Perovskite Solar Cells

Role of Metal Oxide Electron‐Transport Layer Modification on the Stability of High Performing Perovskite Solar Cells

Dig deeper–Solution at the bottom! Recent developments of metal oxide-based electron-transporting layers (ETLs) for high performing, stable perovskite solar cells (PSCs) are reviewed. Various methodologies to modify existing ETLs, the first deposited layer in regular architecture PSCs, are highlighted, and the effects of these modifications are considered towards the design of a cell structure with high performance and stability.

[Minireview]
Trilok Singh, Jai Singh, Tsutomu Miyasaka
ChemSusChem, August 24, 2016, DOI: 10.1002/cssc.201601004. Read article

Additive-Free Transparent Triarylamine-Based Polymeric Hole-Transport Materials for Stable Perovskite Solar Cells

Additive‐Free Transparent Triarylamine‐Based Polymeric Hole‐Transport Materials for Stable Perovskite Solar Cells

PolyTPAs for stable PSCs: Poly(triarylamine) with methylphenylethenyl functional groups (V873) is used as a hole-transporting material in perovskite solar cells (PSCs). Devices employing V873 reach a power conversion efficiency of 12.3 % without any additives, and enable stable operation under 1 sun at maximum power point tracking and under elevated temperature (85 °C). This result shows remarkable progress towards stable PSCs under real working conditions and industrial stress tests.

[Communication]
Taisuke Matsui, Ieva Petrikyte, Tadas Malinauskas, Konrad Domanski, Maryte Daskeviciene, Matas Steponaitis, Paul Gratia, Wolfgang Tress, Juan-Pablo Correa-Baena, Antonio Abate, Anders Hagfeldt, Michael Grätzel, Mohammad Khaja Nazeeruddin, Vytautas Getautis, Michael Saliba
ChemSusChem, August 24, 2016, DOI: 10.1002/cssc.201600762. Read article

Benzodithiophene-Based Polymers Containing Alkylthiophenyl Side Chains with Lowered HOMO Energy Levels for Organic Solar Cells

Benzodithiophene‐Based Polymers Containing Alkylthiophenyl Side Chains with Lowered HOMO Energy Levels for Organic Solar Cells

A drop in the HOMO: Alkylthiophenyl is introduced as a side chain in a benzodithiophene (BDT) photovoltaic polymer for the first time. Three BDT-based polymers (copolymerized with 4,7-di(4-(2-ethylhexyl)-2-thienyl)-2,1,3-benzothiadiazole (DTBT), quinoxaline, and diketopyrrolopyrrole (DPP)) are synthesized. The HOMO levels of these three polymers are 0.14 eV lower than their counterpart polymers. Low HOMO levels (−5.49 eV, −5.34 eV, and −5.50 eV) are achieved to get polymer solar cells with high Voc values.

[Full Paper]
Meijie Fan, Zhengkun Du, Weiye Chen, Deyu Liu, Shuguang Wen, Mingliang Sun, Renqiang Yang
Asian J. Org. Chem., August 24, 2016, DOI: 10.1002/ajoc.201600244. Read article

ZnO Nanostructures-based Dye-sensitized Solar Cells using TEMPO+/TEMPO Redox Mediator and Ruthenium(II) Photosensitizers with 1,2,3-Triazole-derived Ligands

A series of thiocyanate-free bis(tridentate) ruthenium(II) complexes incorporating 1,2,3-triazole-derived NNN-, NCN-, and CNC-coordinating ligands has been employed for sensitizing ZnO photoanodes for dye-sensitized solar cells (DSSCs). Additionally, the first use of the TEMPO+/TEMPO redox mediator as the surrogate of I3-/I- a redox couple in ZnO nanostructure-based DSSCs is presented. When compared to I3-/I--based electrolytes, shorter charge lifetimes and diffusion lengths were determined for the TEMPO+/TEMPO-based electrolyte. Nonetheless, similar power conversion efficiencies (PCEs) are achieved with both electrolytes for RuNCN and RuCNC, while higher PCEs are enabled by the iodine-free electrolyte in case of RuNNN. The combinations of the molecular sensitizers and the TEMPO-based electrolyte exhibit relatively high EQE and gain promising PCEs, ranging from 4.48 to 1.47%, which are - in part - comparable to that of ZnO-DSSCs with the benchmark N749 black dye. The TEMPO-based electrolyte also exhibits less absorption compared to its I3-/I- counterpart, a favorable feature to enhance light harvesting by the photoanode. Furthermore, the results show the effect of the dye sensitization procedure on PCE values: The use of ethanol as the solvent compared to methanol increases the DSSCs efficiency, which is attributed to an improved chemisorption of the sensitizer onto the ZnO surface.

[Full Paper]
Benjamin Dietzek, Ruri Agung Wahyuono, Benjamin Schulze, Mihai Rusu, Maria Wächtler, Jan Dellith, Martin Seyring, Jonathan Plentz, Anna Iganszak, Markus Rettenmayr, Ulrich S. Schubert
ChemPlusChem, August 22, 2016, DOI: 10.1002/cplu.201600377. Read article

Stable Low-Bandgap Pb–Sn Binary Perovskites for Tandem Solar Cells

Stable Low‐Bandgap Pb–Sn Binary Perovskites for Tandem Solar Cells

A low-bandgap (1.33 eV) Sn-based MA0.5FA0.5Pb0.75Sn0.25I3 perovskite is developed via combined compositional, process, and interfacial engineering. It can deliver a high power conversion efficiency (PCE) of 14.19%. Finally, a four-terminal all-perovskite tandem solar cell is demonstrated by combining this low-bandgap cell with a semitransparent MAPbI3 cell to achieve a high efficiency of 19.08%.

[Communication]
Zhibin Yang, Adharsh Rajagopal, Chu-Chen Chueh, Sae Byeok Jo, Bo Liu, Ting Zhao, Alex K.-Y. Jen
Adv. Mater., August 22, 2016, DOI: 10.1002/adma.201602696. Read article

Cooperative Effect of GO and Glucose on PEDOT:PSS for High VOC and Hysteresis-Free Solution-Processed Perovskite Solar Cells

Cooperative Effect of GO and Glucose on PEDOT:PSS for High VOC and Hysteresis‐Free Solution‐Processed Perovskite Solar Cells

The synergistic effect of graphene oxide and glucose in improving the conduction properties of polymer electrolyte poly(3,4-ethyl­enedioxythiophene):poly­(styrenesul­fonate) and modifying the sensible interface of perovskite solar cells is reported. This method allows obtaining hysteresis-free and high VOC CH3NH3PbI3 devices displaying a ≈37% improvement in power conversion efficiency, evidencing minimal recombination losses and very efficient charge extraction at the electrodes.

[Full Paper]
Antonella Giuri, Sofia Masi, Silvia Colella, Alessandro Kovtun, Simone Dell'Elce, Emanuele Treossi, Andrea Liscio, Carola Esposito Corcione, Aurora Rizzo, Andrea Listorti
Adv. Funct. Mater., August 22, 2016, DOI: 10.1002/adfm.201603023. Read article

Donor and Acceptor Unit Sequences Influence Material Performance in Benzo[1,2-b:4,5-b′]dithiophene–6,7-Difluoroquinoxaline Small Molecule Donors for BHJ Solar Cells

Donor and Acceptor Unit Sequences Influence Material Performance in Benzo[1,2‐b:4,5‐b′]dithiophene–6,7‐Difluoroquinoxaline Small Molecule Donors for BHJ Solar Cells

Changing the sequence of donor and acceptor units along the π-extended backbone of benzo[1,2-b:4,5-b′]dithiophene–6,7-difluoroquinoxaline small molecule (SM) donors critically impacts (i) molecular packing, (ii) propensity to order and preferential aggregate orientations in thin-films, and (iii) charge transport in bulk-heterojunction (BHJ) solar cells. The lower-bandgap analogue (SM1) achieves distinct local packing and aggregation patterns in thin films, and optimized BHJ solar cell efficiencies of ≈6.6%.

[Full Paper]
Kai Wang, Ru-Ze Liang, Jannic Wolf, Qasim Saleem, Maxime Babics, Philipp Wucher, Maged Abdelsamie, Aram Amassian, Michael Ryan Hansen, Pierre M. Beaujuge
Adv. Funct. Mater., August 22, 2016, DOI: 10.1002/adfm.201602162. Read article

Dopant-free back contact silicon heterojunction solar cells employing transition metal oxide emitters

Dopant‐free back contact silicon heterojunction solar cells employing transition metal oxide emitters

The fabrication process of three transition metal oxide (WOx, MoOx and V2Ox)/n-Si back contact solar cells offers great potential for the mass production owing to metal mask patterning and dopant-free steps conducted at a lower temperature. The present work is also the first integration of WOx, V2Ox and Cs2CO3 in silicon based back-contact solar cells. The best device performance was achieved by the V2Ox/n-Si solar cell, demonstrating an efficiency of 16.59%.

[rrl solar]
Weiliang Wu, Jie Bao, Xuguang Jia, Zongtao Liu, Lun Cai, Binhui Liu, Jingwei Song, Hui Shen
Phys. Status Solidi RRL, August 19, 2016, DOI: 10.1002/pssr.201600254. Read article

Material and Device Stability in Perovskite Solar Cells

Material and Device Stability in Perovskite Solar Cells

Between the layers: The stability of perovskite solar cells and the research involved to overcome this challenge through optimization of the perovskite material and charge-selective layers is reviewed in detail. The most dominant factor affecting stability of halide perovskite is moisture, which induces even faster degradation when it was coupled with light and heat. The stability issues in perovskite solar cells are expected to be solved as we gain better understanding of the factors and the mechanisms on the instability of perovskite solar cells.

[Review]
Hui-Seon Kim, Ja-Young Seo, Nam-Gyu Park
ChemSusChem, August 18, 2016, DOI: 10.1002/cssc.201600915. Read article

Electron Transport in Quasi-Two-Dimensional Porous Network of Titania Nanoparticles, Incorporating Electrical and Optical Advantages in Dye-Sensitized Solar Cells

The integration of fast electron transport and large effective surface area is critical to attaining higher gains in the nanostructured photovoltaic devices. Here, we report facilitated electron transport in the quasi-two-dimensional (Q2D) porous TiO2. Liquid electrolyte dye-sensitized solar cells were prepared by utilizing photoanodes based on the Q2D porous substructures. Due to electron confinement in a micro-scale porous medium, a directional diffusion toward collecting electrode is induced into the electron transport. Our measurements based on the photocurrent and photovoltage time of flight transients show that at higher Fermi levels, electron diffusion coefficient in the Q2D porous TiO2 is about one order of magnitude higher when compared with the conventional layer of porous TiO2. The results show that micro-structuring of the porous TiO2 leads to an approximately threefold improvement in the electron diffusion length. Such a modification may considerably affects the electrical functionality of moderate or low performance dye-sensitized solar cells for which the internal gain or collection efficiency is typically low.

[Article]
Mohammad Javadi, Saba Alizadeh, Yusef Khosravi, Yaser Abdi
ChemPhysChem, August 18, 2016, DOI: 10.1002/cphc.201600609. Read article

Naphthacenodithiophene Based Polymers—New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency

Naphthacenodithiophene Based Polymers—New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency

Naphthacenodithiophene-benzothiadiazole (NDT-BT) copolymers have been synthesized via a palladium-catalyzed Suzuki coupling reaction. Compared to the analogous indacenodithiophene polymers, these NDT-BT copolymers have a wider bandgap of 1.8 eV. Hole mobilities of around 0.4 cm2 V–1 s–1 are observed and, in combination with a PC70BM acceptor, power conversion efficiencies of 7.5% are obtained in organic bulk heterojunction solar cells.

[Full Paper]
Astrid-Caroline Knall, Raja Shahid Ashraf, Mark Nikolka, Christian B. Nielsen, Balaji Purushothaman, Aditya Sadhanala, Michael Hurhangee, Katharina Broch, David J. Harkin, Jiří Novák, Marios Neophytou, Pascal Hayoz, Henning Sirringhaus, Iain McCulloch
Adv. Funct. Mater., August 18, 2016, DOI: 10.1002/adfm.201602285. Read article

Low-Pressure Vapor-Assisted Solution Process for Thiocyanate-Based Pseudohalide Perovskite Solar Cells

Low‐Pressure Vapor‐Assisted Solution Process for Thiocyanate‐Based Pseudohalide Perovskite Solar Cells

Pseudohalide, solid performance: Pseudohalide SCN-based perovskite layers are fabricated using the low-pressure vapor-assisted solution processing method. The formation mechanism, full characterization of the films, and the SCN/I ratio in the final perovskite films are investigated. Devices fabricated using these films yielded power conversion efficiency values of 12.72 % with nearly 90 % of the initial PCE maintained after a 10 day stability test.

[Full Paper]
Yu-Hsien Chiang, Hsin-Min Cheng, Ming-Hsien Li, Tzung-Fang Guo, Peter Chen
ChemSusChem, August 17, 2016, DOI: 10.1002/cssc.201600674. Read article

Radiation Hardness and Self-Healing of Perovskite Solar Cells

Radiation Hardness and Self‐Healing of Perovskite Solar Cells

The radiation hardness of CH3NH3PbI3-based solar cells is evaluated from in situ measurements during high-energy proton irradiation. These organic–inorganic perovskites exhibit radiation hardness and withstand proton doses that exceed the damage threshold of crystalline silicon by almost 3 orders of magnitude. Moreover, after termination of the proton irradiation, a self-healing process of the solar cells commences.

[Communication]
Felix Lang, Norbert H. Nickel, Jürgen Bundesmann, Sophie Seidel, Aandrea Denker, Steve Albrecht, Victor V. Brus, Jörg Rappich, Bernd Rech, Giovanni Landi, Heinrich C. Neitzert
Adv. Mater., August 16, 2016, DOI: 10.1002/adma.201603326. Read article

Reducible-Shell-Derived Pure-Copper-Nanowire Network and Its Application to Transparent Conducting Electrodes

Reducible‐Shell‐Derived Pure‐Copper‐Nanowire Network and Its Application to Transparent Conducting Electrodes

Copper–copper-lactate core–shell nanowires (NWs) are introduced via simple one-pot synthesis. Thermally reducible Cu-lactate shells conformally encapsulate individual CuNWs, providing long-term oxidation stability. Cu–Cu-lactate core–shell NW is transformed into highly conductive CuNW-based transparent electrodes without a reductive atmosphere.

[Full Paper]
Hyewon Hwang, Areum Kim, Zhaoyang Zhong, Hyeok-Chan Kwon, Sunho Jeong, Jooho Moon
Adv. Funct. Mater., August 16, 2016, DOI: 10.1002/adfm.201602094. Read article

Absorption Enhancement in “Giant” Core/Alloyed-Shell Quantum Dots for Luminescent Solar Concentrator

Absorption Enhancement in “Giant” Core/Alloyed‐Shell Quantum Dots for Luminescent Solar Concentrator

The “giant” CdSe/CdxPb1–xS core/shell quantum dots (QDs) based luminescent solar concentrator (LSC) presents high transparency with low reabsorption losses, with the absorption spectrum ranging from 300 to 600 nm. The prototype LSC exhibits a 15% enhancement in efficiency compared to CdS-shell QDs, up to 1.15% maximum efficiency, thanks to the contribution of Pb dopants indicating the potential application in photovoltaics.

[Full Paper]
Haiguang Zhao, Daniele Benetti, Lei Jin, Yufeng Zhou, Federico Rosei, Alberto Vomiero
Small, August 12, 2016, DOI: 10.1002/smll.201600945. Read article

Impact of Precursor Compositions on the Structural and Photovoltaic Properties of Spray-Deposited Cu2ZnSnS4 Thin Films

Impact of Precursor Compositions on the Structural and Photovoltaic Properties of Spray‐Deposited Cu2ZnSnS4 Thin Films

Efficient and cheap: The metallic compositions of the precursor solutions were found to have a significant effect on the grain sizes, morphologies, acceptor densities, the nature of the acceptor defects, and carrier density of Cu2ZnSnS4 films. A device with high conversion efficiency of 8.1 % was obtained from the film with an optimal composition.

[Full Paper]
Thi Hiep Nguyen, Shotaro Fujikawa, Takashi Harada, Jakapan Chantana, Takashi Minemoto, Shuji Nakanishi, Shigeru Ikeda
ChemSusChem, August 12, 2016, DOI: 10.1002/cssc.201600641. Read article

Transition metal-modified polyaniline nanofiber counter electrode for dye-sensitized solar cells

Novel polyaniline (PANI) nanofiber counter electrodes (CEs) modified by different transition metal ions were synthesized and showed remarkable catalytic activity for dye-sensitized solar cells (DSSCs). The PANI nanofiber-transition metal ion electrodes were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, current density-voltage curves, energy-dispersive X-ray spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization plots. The PANI CEs modified by Ni2+ and Co2+ exhibited low charge transfer resistance and series resistance, which indicate high electrocatalytic activity toward the iodide redox shuttle. In contrast, the PANI CE modified by Mn2+ did not show much difference in its catalytic behavior, while the PANI-Cu2+ CE showed reduced electrochemical performance. The photovoltaic performances of the DSSCs based on the PANI-Ni2+ and PANI-Co2+ CEs were evaluated and they were found to exhibit power conversion eciency of 4.70% and 4.57%, higher than that of the pristine PANI CE based device (3.87%). These easily fabricated PANI-metal composites with improved electrochemical activity are promising CEs for DSSCs to replace expensive Pt.

[Article]
Kezhong Wu, Lei Chen, Xiaolong Sun, Mingxing Wu
ChemElectroChem, August 12, 2016, DOI: 10.1002/celc.201600326. Read article

Enhancing Efficiency of Perovskite Solar Cells via N-doped Graphene: Crystal Modification and Surface Passivation

Enhancing Efficiency of Perovskite Solar Cells via N‐doped Graphene: Crystal Modification and Surface Passivation

Controlling the morphology and surface passivation in perovskite solar cells is paramount in obtaining optimal optoelectronic properties. This study incorporates N-doped graphene nanosheets in the perovskite layer which simultaneously induce an improved morphology and surface passivation at the perovskite/spiro interface, resulting in enhancement in all photovoltaic parameters.

[Communication]
Mahboubeh Hadadian, Juan-Pablo Correa-Baena, Elaheh K. Goharshadi, Amita Ummadisingu, Ji-Youn Seo, Jingshan Luo, Somayeh Gholipour, Shaik M. Zakeeruddin, Michael Saliba, Antonio Abate, Michael Grätzel, Anders Hagfeldt
Adv. Mater., August 12, 2016, DOI: 10.1002/adma.201602785. Read article

Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells

Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells

Microscopic charge transport and recombination processes behind the widely concerned photoelectric hysteresis in perovskite solar cells are investigated with in situ transient photovoltage and photocurrent measurements, which gives clear information about the internal electric properties of the cell. Further theoretical calculations reveal that both the interfacial doping and defect induced by the ion accumulation are the physical origins for this hysteresis.

[Full Paper]
Jiangjian Shi, Huiyin Zhang, Xin Xu, Dongmei Li, Yanhong Luo, Qingbo Meng
Small, August 11, 2016, DOI: 10.1002/smll.201601543. Read article

Magnesium-doped Zinc Oxide as Electron Selective Contact Layers for Efficient Perovskite Solar Cells

Magnesium‐doped Zinc Oxide as Electron Selective Contact Layers for Efficient Perovskite Solar Cells

Mg+ZnO=improved stability: To improve the power conversion efficiency and the thermostability in ZnO/CH3NH3PbI3-based perovskite solar cells (PSCs), magnesium-doped ZnO is developed as the electron-selective contact layer. The optimized ZMO PSCs exhibit significantly improved durability and photo-stability.

[Full Paper]
Jiaxing Song, Enqiang Zheng, Leijing Liu, Xiao-Feng Wang, Gang Chen, Wenjing Tian, Tsutomu Miyasaka
ChemSusChem, August 11, 2016, DOI: 10.1002/cssc.201600860. Read article

Toward Tailored Film Morphologies: The Origin of Crystal Orientation in Hybrid Perovskite Thin Films

Toward Tailored Film Morphologies: The Origin of Crystal Orientation in Hybrid Perovskite Thin Films

The origin of orientation in MAPI films produced by two-step deposition methods is investigated by grazing-incidence wide-angle X-ray scattering. An overview over morphologies produced by typical fabrication methods is given, and the morphology and orientation of the precursor and the resulting perovskite film is shown to be linked in different ways depending on the conversion method.

[Full Paper]
Lukas Oesinghaus, Johannes Schlipf, Nadja Giesbrecht, Lin Song, Yinghong Hu, Thomas Bein, Pablo Docampo, Peter Müller-Buschbaum
Adv. Mater. Interfaces, August 11, 2016, DOI: 10.1002/admi.201600403. Read article

Encapsulation of Perovskite Solar Cells for High Humidity Conditions

Encapsulation of Perovskite Solar Cells for High Humidity Conditions

Seal in the stability: Different encapsulation techniques are examined for perovskite solar cells. The cells encapsulated with a SiO2 thin film and cover glass packaging incorporating desiccant and UV-curable epoxy exhibit good performance in accelerated lab testing under illumination and at 85 °C, as well as in outdoor testing in Hong Kong.

[Full Paper]
Qi Dong, Fangzhou Liu, Man Kwong Wong, Ho Won Tam, Aleksandra B. Djurišić, Annie Ng, Charles Surya, Wai Kin Chan, Alan Man Ching Ng
ChemSusChem, August 09, 2016, DOI: 10.1002/cssc.201600868. Read article

High-Performance Photovoltaic Polymers Employing Symmetry-Breaking Building Blocks

High‐Performance Photovoltaic Polymers Employing Symmetry‐Breaking Building Blocks

Two 1D–2D asymmetric benzodithiophenes (BDTs) as donor building blocks are designed and synthesized, combining the advantages of both 1D and 2D symmetric BDTs. The photovoltaic properties of the asymmetric BDT-based polymers are improved greatly in comparison with corresponding symmetric BDT-based polymers. This work provides a new approach to design prospective organic optoelectronic materials employing the symmetry-breaking strategy.

[Communication]
Deyu Liu, Qianqian Zhu, Chunyang Gu, Junyi Wang, Meng Qiu, Weichao Chen, Xichang Bao, Mingliang Sun, Renqiang Yang
Adv. Mater., August 08, 2016, DOI: 10.1002/adma.201602857. Read article

A Vinylene-Bridged Perylenediimide-Based Polymeric Acceptor Enabling Efficient All-Polymer Solar Cells Processed under Ambient Conditions

A Vinylene‐Bridged Perylenediimide‐Based Polymeric Acceptor Enabling Efficient All‐Polymer Solar Cells Processed under Ambient Conditions

All-polymer solar cells with 7.57% power conversion efficiency are achieved via a new perylenediimide-based polymeric acceptor. Furthermore, the device processed in ambient air without encapsulation can still reach a high power conversion efficiency (PCE) of 7.49%, which is a significant economic advantage from an industrial processing perspective. These results represent the highest PCE achieved from perylenediimide-based polymers.

[Communication]
Yikun Guo, Yunke Li, Omar Awartani, Jingbo Zhao, Han Han, Harald Ade, Dahui Zhao, He Yan
Adv. Mater., August 08, 2016, DOI: 10.1002/adma.201602387. Read article

On the Origin of Hysteresis in Perovskite Solar Cells

On the Origin of Hysteresis in Perovskite Solar Cells

The origin of hysteresis behavior in perovskite solar cells is probed with simultaneous measurements of cell open circuit voltage and photoluminescence intensity over time following illumination of the cell. The findings demonstrate the existence of a resistive barrier to majority carrier flow at the interfaces of these devices, in combination with significant interface recombination.

[Full Paper]
Yiliang Wu, Heping Shen, Daniel Walter, Daniel Jacobs, The Duong, Jun Peng, Liangcong Jiang, Yi-Bing Cheng, Klaus Weber
Adv. Funct. Mater., August 08, 2016, DOI: 10.1002/adfm.201602231. Read article

Copper Thiocyanate: An Efficient and Affordable Hole Transporting Material, toward Thermally Stable Perovskite Solar Cells

Copper Thiocyanate: An Efficient and Affordable Hole Transporting Material, toward Thermally Stable Perovskite Solar Cells

An interfacial degradation mechanism occurring at the heterojunction between the perovskite absorber and the CuSCN is discovered, identifying the presence of a critical instability. This issue can be alleviated with the additional coating of the completed cells with a thin film of insulating layer, delivering efficient perovskite solar cells with outstanding thermal stability.

[Full Paper]
Jiewei Liu, Sandeep K. Pathak, Nobuya Sakai, Rui Sheng, Sai Bai, Zhiping Wang, Henry J. Snaith
Adv. Mater. Interfaces, August 05, 2016, DOI: 10.1002/admi.201600571. Read article

A Room-Temperature Processable PDI-Based Electron-Transporting Layer for Enhanced Performance in PDI-Based Non-Fullerene Solar Cells

A Room‐Temperature Processable PDI‐Based Electron‐Transporting Layer for Enhanced Performance in PDI‐Based Non‐Fullerene Solar Cells

A room-temperature processable organic perylene-diimide (PDI)-based electron-transporting layer (ETL) is demonstrated to enhance the performance of inverted PDI-based organic solar cells. The amine functionalized perylene-diimide (PDIN) ETL can effectively modulate bulk-heterojunction morphology atop to induce improved out-of-plane π–π stacking and associated lamellar orientation. Consequently, it can replace or modify the regularly used ZnO ETL for enhanced photovoltaic performance.

[Full Paper]
Jiangsheng Yu, Yuyin Xi, Chu-Chen Chueh, Dongbing Zhao, Francis Lin, Lilo D. Pozzo, Weihua Tang, Alex K.-Y. Jen
Adv. Mater. Interfaces, August 05, 2016, DOI: 10.1002/admi.201600476. Read article

Surface Passivation for Reliable Measurement of Bulk Electronic Properties of Heterojunction Devices

Surface Passivation for Reliable Measurement of Bulk Electronic Properties of Heterojunction Devices

Alumina is deposited by atomic layer deposition on a heterojunction device to reduce recombination in a surface sensitive electrical measurement. As an example and for validation this study investigates baseline Cu(In,Ga)Se2 thin film solar cells and derives an estimate for the collection and optical loss in the quantum efficiency. The approach is extended to CdTe, and Kesterite absorbers.

[Full Paper]
Benjamin Bissig, Carlos Guerra-Nunez, Romain Carron, Shiro Nishiwaki, Fabio La Mattina, Fabian Pianezzi, Paolo A. Losio, Enrico Avancini, Patrick Reinhard, Stefan G. Haass, Martina Lingg, Thomas Feurer, Ivo Utke, Stephan Buecheler, Ayodhya N. Tiwari
Small, August 04, 2016, DOI: 10.1002/smll.201601575. Read article

Thermodynamic Stability and Defect Chemistry of Bismuth-Based Lead-Free Double Perovskites

Thermodynamic Stability and Defect Chemistry of Bismuth‐Based Lead‐Free Double Perovskites

Pb-free, defect-directed: Density functional theory calculations are performed to study the thermodynamic stability, electronic structure, and defect properties of Pb-free double perovskite Cs2AgBiBr6. It is found that Ag vacancies are shallow acceptors and can easily form, leading to intrinsic p-type conductivity, whereas Ag-on-Bi antisites are deep acceptors, whose formation can be suppressed under the Bi-rich/Br-poor growth conditions, which is necessary for photovoltaic and other optoelectronic applications of Cs2AgBiBr6.

[Full Paper]
Zewen Xiao, Weiwei Meng, Jianbo Wang, Yanfa Yan
ChemSusChem, August 04, 2016, DOI: 10.1002/cssc.201600771. Read article

Effect of Halide Composition on the Photochemical Stability of Perovskite Photovoltaic Materials

Effect of Halide Composition on the Photochemical Stability of Perovskite Photovoltaic Materials

To be or not to be (efficient and stable): Photochemical stability studies of MAPb(I1−xBrx)3 (MA=methylammonium) photovoltaic materials show that mixed halide compositions are less stable than pure halide ones. We postulate that these solid solutions contain internal stresses and structural defects, which might be responsible for their accelerated degradation.

[Communication]
Ravi K. Misra, Laura Ciammaruchi, Sigalit Aharon, Dmitry Mogilyansky, Lioz Etgar, Iris Visoly-Fisher, Eugene A. Katz
ChemSusChem, August 04, 2016, DOI: 10.1002/cssc.201600679. Read article

High Efficiency Organic Solar Cells Achieved by the Simultaneous Plasmon-Optical and Plasmon-Electrical Effects from Plasmonic Asymmetric Modes of Gold Nanostars

High Efficiency Organic Solar Cells Achieved by the Simultaneous Plasmon‐Optical and Plasmon‐Electrical Effects from Plasmonic Asymmetric Modes of Gold Nanostars

The power conversion efficiency of plasmonic organic solar cell reaches 10.5% through strategically incorporating gold nanostars (AuNSs) in between hole transport layer and active layer. Plasmon-optical effects: The excited plasmonic asymmetric modes of AuNSs induce a broadband enhancement. Plasmon-electrical effects: The embedded AuNSs facilitate carrier collection owing to better balanced carrier transport path length and reduced carrier transport resistance.

[Full Paper]
Xingang Ren, Jiaqi Cheng, Shaoqing Zhang, Xinchen Li, Tingke Rao, Lijun Huo, Jianhui Hou, Wallace C. H. Choy
Small, August 03, 2016, DOI: 10.1002/smll.201601949. Read article

Improved Morphology and Efficiency of Polymer Solar Cells by Processing Donor–Acceptor Copolymer Additives

Improved Morphology and Efficiency of Polymer Solar Cells by Processing Donor–Acceptor Copolymer Additives

A novel wide-bandgap conjugated polymer PBTA-FPh based on benzodithiophene-alt-benzo[1,2,3]triazole as the main chain and a polar pentafluorothiophenyl (FPh) group in a side chain has been designed and synthesized as a polymeric additive. The incorporation of PBTA-FPh can lead to improved miscibility and morphology of PBTA-BO:PC71BM blend films, resulting in obviously improved power conversion efficiency of polymer solar cells from 6.46% to 7.91%.

[Full Paper]
Baobing Fan, Chen Sun, Xiao-Fang Jiang, Guichuan Zhang, Zhiming Chen, Lei Ying, Fei Huang, Yong Cao
Adv. Funct. Mater., July 28, 2016, DOI: 10.1002/adfm.201601625. Read article

Indoline-Based Molecular Engineering for Optimizing the Performance of Photoactive Thin Films

Indoline‐Based Molecular Engineering for Optimizing the Performance of Photoactive Thin Films

New indoline derivatives characterized by good planarity and high molar absorptivity are successfully applied to dye-sensitized solar cells (DSCs). By controlling the hydrocarbon chain length, noticeable photocurrent density is achieved at a very thin TiO2 film, which is traced elementally, guiding the research of organic dyes for thin film-based DSCs.

[Full Paper]
Ming Yu Jin, Byung-Man Kim, Hyun Sil Jung, Jun-Hyeok Park, Deok-Ho Roh, Dong Guk Nam, Tae-Hyuk Kwon, Do Hyun Ryu
Adv. Funct. Mater., July 28, 2016, DOI: 10.1002/adfm.201600951. Read article

Highly Efficient p-i-n Perovskite Solar Cells Utilizing Novel Low-Temperature Solution-Processed Hole Transport Materials with Linear π-Conjugated Structure

Highly Efficient p‐i‐n Perovskite Solar Cells Utilizing Novel Low‐Temperature Solution‐Processed Hole Transport Materials with Linear π‐Conjugated Structure

Two novel small molecular materials are explored as the hole-transporting layer in p-i-n perovskite solar cells (PSCs), yielding high efficiencies of 17.4% and 17.6%, respectively, which are ≈40% higher than the standard PSCs.

[Full Paper]
Yang Li, Zheng Xu, Suling Zhao, Bo Qiao, Di Huang, Ling Zhao, Jiao Zhao, Peng Wang, Youqin Zhu, Xianggao Li, Xicheng Liu, Xurong Xu
Small, July 22, 2016, DOI: 10.1002/smll.201601603. Read article

Synthesis and Characterization of Diethylphosphonate and Carboxylate–appended Iridium Complexes for the Application on Dye-Sensitized Solar Cells

Synthesis and Characterization of Diethylphosphonate and Carboxylate–appended Iridium Complexes for the Application on Dye‐Sensitized Solar Cells

We study the effect of carboxylate and diethylphosphonate anchoring groups, on the optical properties of cyclometalated iridium(III) complexes and further applied these complexes in Dye-Sensitized Solar Cells. Although the phosphonate-appended iridium complexes present stronger bonding to the TiO2 surface in aqueous solution, the highest power conversion efficiency was obtained from the carboxylate-appended complexes.

[Full Paper]
Ainara Telleria, B. S. Emerson C. Kohlrausch, Rodrigo da C. Duarte , Fabiano S. Rodembusch, Jairton Dupont, Zoraida Freixa , Marcos J. L. Santos
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600700. Read article

Cobalt Sulfide as Counter Electrode in p-Type Dye-Sensitized Solar Cells

Cobalt Sulfide as Counter Electrode in p‐Type Dye‐Sensitized Solar Cells

The application of cobalt sulfide as counter electrodes in a p-type dye sensitized solar cell, using I-/I3- as redox electrolyte and erythrosine B as photosensitizer anchored to p-type nickel oxide. The charge separation happens at the interface erythrosine//electrolyte after the absorption of a photon. In our configuration, the reduced redox mediator (I-) have been regenerated at the anode: a conducting transparent oxide (TCO) covered with a thin layer of CoS.

[Full Paper]
Mirko Congiu, Matteo Bonomo, Maria Letizia De Marco, Denis P. Dowling, Aldo Di Carlo, Danilo Dini, Carlos F. O. Graeff 
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600297. Read article

Role of the Bulky Aryloxy Group at the Non-Peripheral Position of Phthalocyanines for Dye Sensitized Solar Cells

Role of the Bulky Aryloxy Group at the Non‐Peripheral Position of Phthalocyanines for Dye Sensitized Solar Cells

A selective performance: Photovoltaic performance of carboxyZnPc substituted with bulky semiflexible aryloxy groups at the non-peripheral positions (see structure) is clearly influenced by the steric hindrance of the substituents with respect to the semiconducting surface. Thus, regioisomers with substituents oriented towards the carboxylic acid anchoring group turn out to have lower adsorption densities, and, consequently, lower short-circuit photocurrents (Jsc) and efficiencies.

[Communication]
Lara Tejerina, M. Victoria Martínez-Díaz, Mohammad K. Nazeeruddin, Michael Grätzel, Tomas Torres
ChemPlusChem, July 20, 2016, DOI: 10.1002/cplu.201600325. Read article

Di-anchoring Organic Dyes Containing Benzimidazole Branch for Dye-Sensitized Solar Cells: Effect of π-Spacer and Peripheral Donor on Functional Properties

Benzimidazole-branched di-anchoring organic dyes containing triphenylamine or phenothiazine donor, 2-cyanoacrylic acid acceptor and various π-linkers have been synthesized and examined as sensitizers for dye sensitized solar cells. The structure-property relationship in these dyes is systematically investigated by absorption spectral, cyclic voltammetric and DFT studies. The absorption peak is dramatically affected by the nature of the π-linker rather than the donor strength. For a donor, the absorption maximum (λmax) is red-shifted on changing the π-linker from phenyl to 2,2'-bithiophene. However, the dyes bearing triphenylamine unit displayed high molar extinction coefficients (ε) than their analogues phenothiazine-based dyes hence high light-harvesting propensity for the former dyes. Electrochemical data for the dyes indicate that the triphenylamine-based dyes possess relatively low-lying HOMO values which can be beneficial to suppress the back electron transfer from conduction band of TiO2¬ to oxidized dyes due to facile regeneration of oxidized dye by electrolyte. Best performance in DSSC was observed for a dye possessing triphenylamine and 2,2'-bithiophene as a π-linker. Electron impedance spectroscopy (EIS) studies revealed that use of triphenylamine donor and phenyl or 2,2'-bithiophene as a π-linkers is beneficial to jeopardize the dark current and charge recombination kinetics, whichled to high electron life time of injected electrons in the CB of TiO2.

[Full Paper]
K R Justin Thomas, Govardhana Babu Bodedla, Miao-Syuan Fan, Kuo-Chuan Ho
Chem. Asian J., July 19, 2016, DOI: 10.1002/asia.201600766. Read article

Electrochemically Prepared Poly(3,4-ethylenedioxy- thiophene)/Polypyrrole Films with Hollow Micro-/Nanohorn Arrays as High-Efficiency Counter Electrodes for Dye-Sensitized Solar Cells

Electrochemically Prepared Poly(3,4‐ethylenedioxy‐ thiophene)/Polypyrrole Films with Hollow Micro‐/Nanohorn Arrays as High‐Efficiency Counter Electrodes for Dye‐Sensitized Solar Cells

From both sides: Poly(3,4-ethylene- dioxythiophene) (PEDOT)/polypyrrole films with hollow micro-/nanohorn arrays are fabricated by using electrochemical methods. Electrolytes can access both the ouside and inside surfaces of the horns (see figure), and the composite film shows comparable catalytic activity to platinum as a counter electrode for dye-sensitized solar cells.

[Article]
Yang Bai, Youlong Xu, Jie Wang, Mingqi Gao, Jianbo Zhu, Wasif ur Rehman
ChemElectroChem, July 06, 2016, DOI: 10.1002/celc.201600191. Read article

Naphthalenediimide-alt-Fused Thiophene D–A Copolymers for the Application as Acceptor in All-Polymer Solar Cells

Naphthalenediimide‐alt‐Fused Thiophene D–A Copolymers for the Application as Acceptor in All‐Polymer Solar Cells

Donor selection: Three n-type alternating donor–acceptor type naphthalenediimide (NDI)–arylene copolymers, constructed from donor units with varied electron-donating strength were synthesized for the application as acceptor materials in all-polymer solar cells (all-PSCs). The results indicate that a larger conjugated fused molecular plane with more thiophene rings as donor units is beneficial to reduce the band gap, broaden the absorption, and enhance the photovoltaic performance of the copolymer acceptors.

[Full Paper]
Lingwei Xue, Yankang Yang, Zhi-Guo Zhang, Jing Zhang, Liang Gao, Haijun Bin, YunXu Yang, Yongfang Li
Chem. Asian J., July 05, 2016, DOI: 10.1002/asia.201600450. Read article

Understanding Solvent Manipulation of Morphology in Bulk-Heterojunction Organic Solar Cells

Understanding Solvent Manipulation of Morphology in Bulk‐Heterojunction Organic Solar Cells

The shape of things to come: Film morphology greatly influences the performance of bulk-heterojunction (BHJ)-structure-based solar cells. The control of the morphology of BHJ devices has been a major focus of research efforts over the last decade. Four solvent-related methods, including solvent selection, solvent mixing, solvent vapor annealing, and solvent soaking can efficiently control the morphology of BHJ films and are reviewed herein.

[Focus Review]
Yuxia Chen, Chuanlang Zhan, Jiannian Yao
Chem. Asian J., June 02, 2016, DOI: 10.1002/asia.201600374. Read article

Visible-Light-Driven Water Oxidation on a Photoanode by Supramolecular Assembly of Photosensitizer and Catalyst

Visible‐Light‐Driven Water Oxidation on a Photoanode by Supramolecular Assembly of Photosensitizer and Catalyst

A “take-charge” guest: A ruthenium water oxidation catalyst was incorporated on the surface of a dye-sensitized nanostructured TiO2 film when it formed a host–guest adduct with the chromophore, providing a new strategy for photoanode construction.

[Communication]
Hua Li, Fei Li, Yong Wang, Lichen Bai, Fengshou Yu, Licheng Sun
ChemPlusChem, January 28, 2016, DOI: 10.1002/cplu.201500539. Read article

Synthesis and Characterization of Phenothiazine-Based Platinum(II)–Acetylide Photosensitizers for Efficient Dye-Sensitized Solar Cells

Synthesis and Characterization of Phenothiazine-Based Platinum(II)–Acetylide Photosensitizers for Efficient Dye-Sensitized Solar Cells

An attractive power conversion efficiency (η) of up to 5.78 %, a short-circuit photocurrent density of 10.98 mA cm−2, an open-circuit photovoltage of 0.738 V, and a fill factor of 0.713 are displayed by the newly synthesized PT1-based dye-sensitized solar cell (DSSC) device. These findings provide strong evidence that platinum–acetylide complexes have great potential as promising photosensitizers in DSSC applications.

[Full Paper]
Chi-Ho Siu, Lawrence Tien Lin Lee, Sze-Chun Yiu, Po-Yu Ho, Panwang Zhou, Cheuk-Lam Ho, Tao Chen, Jianrong Liu, Keli Han, Wai-Yeung Wong
Chem. Eur. J., December 11, 2015, DOI: 10.1002/chem.201503828. Read article.

Color Bricks: Building Highly Organized and Strongly Absorbing Multicomponent Arrays of Terpyridyl Perylenes on Metal Oxide Surfaces

Color Bricks: Building Highly Organized and Strongly Absorbing Multicomponent Arrays of Terpyridyl Perylenes on Metal Oxide Surfaces

Socket and linker: Terpyridine-substituted perylenes containing cyclic anhydrides were assembled as monomolecular layers on metal oxide surfaces. Bis(terpyridyl) perylene diimides were used as linkers to build supramolecular assemblies by coordination with Zn2+ ions (see figure). With proper selection of the anchor and linker highly stable, deeply colored, multilayer structures with greater than ten successive layers were prepared.

[Full Paper]
Essi Sariola-Leikas, Zafar Ahmed, Paola Vivo, Anniina Ojanperä, Kimmo Lahtonen, Jesse Saari, Mika Valden, Helge Lemmetyinen, Alexander Efimov
Chem. Eur. J., December 3, 2015, DOI: 10.1002/chem.201503738. Read article.

Azafullerene C59N in Donor–Acceptor Dyads: Synthetic Approaches and Properties

Azafullerene C59N in Donor–Acceptor Dyads: Synthetic Approaches and Properties

Energy conversion schemes: Donor–acceptor systems based on the azafullerene C59N are reviewed. While focusing on the synthetic strategies, the properties of systems employing this azafullerene as electron or energy acceptor are also presented, unfolding both the synthetic access as well as the unique electronic properties of these systems. Both in dyads in solution as well as in solar cell devices, C59N is revealed as a promising acceptor for energy conversion schemes.

[Minireview]
Georgios Rotas, Nikos Tagmatarchis
Chem. Eur. J., November 26, 2015, DOI: 10.1002/chem.201502190. Read article.

Understanding the External Quantum Efficiency of Organic Homo-Tandem Solar Cells Utilizing a Three-Terminal Device Architecture

Thumbnail image of graphical abstract

A three-terminal tandem solar cell architecture enables detailed studies of the external quantum efficiencies (EQEs) of organic homo-tandem solar cells. Due to optoelectronic equality, all results can be transferred to conventional two-terminal tandem cells including a detailed study of subcell saturation by monochromatic bias light and bias voltage needed for accurate EQE measurements.

[Full Paper]
Daniel Bahro, Manuel Koppitz, Adrian Mertens, Konstantin Glaser, Jan Mescher, Alexander Colsmann
Adv. Energy Mater., August 26, 2015, DOI: 10.1002/aenm.201501019. Read article

Thin-Film Solar Cells with InP Absorber Layers Directly Grown on Nonepitaxial Metal Substrates

Thumbnail image of graphical abstract

The design and performance of solar cells based on InP grown by the nonepitaxial thin-film vapor–liquid–solid growth technique is investigated. The cell structure consists of a Mo back contact, p-InP absorber layer, n-TiO2 electron selective contact, and indium tin oxide transparent top electrode. The highest measured open circuit voltage (VOC) under 1 sun is 692 mV, which approaches the optically implied VOC of ≈795 mV extracted from the luminescence yield of p-InP.

[Full Paper]
Maxwell Zheng, Hsin-Ping Wang, Carolin M. Sutter-Fella, Corsin Battaglia, Shaul Aloni, Xufeng Wang, James Moore, Jeffrey W. Beeman, Mark Hettick, Matin Amani, Wei-Tse Hsu, Joel W. Ager, Peter Bermel, Mark Lundstrom, Jr-Hau He, Ali Javey
Adv. Energy Mater., August 25, 2015, DOI: 10.1002/aenm.201501337. Read article

Water Ingress in Encapsulated Inverted Organic Solar Cells: Correlating Infrared Imaging and Photovoltaic Performance

Thumbnail image of graphical abstract

Lifetime limitations of current-generation inverted and encapsulated organic solar cells under damp heat conditions are identified by correlating photovoltaic device performance with lock-in IR imaging techniques. The combination of electroluminescence imaging and water diffusion modeling may inform strategies for predicting early performance losses in solar cells and modules.

[Full Paper]
Jens Adams, Michael Salvador, Luca Lucera, Stefan Langner, George D. Spyropoulos, Frank W. Fecher, Monika M. Voigt, Simon A. Dowland, Andres Osvet, Hans-Joachim Egelhaaf, Christoph J. Brabec
Adv. Energy Mater., August 12, 2015, DOI: 10.1002/aenm.201501065. Read article

Large Efficiency Improvement in Cu2ZnSnSe4 Solar Cells by Introducing a Superficial Ge Nanolayer

Thumbnail image of graphical abstract

A large improvement of Cu2ZnSnSe4 solar cell efficiency is presented based on the introduction of a Ge superficial nanolayer. This improvement is explained by three complementary effects: the formation of a liquid Ge-related phase, the possible reduction of Sn multicharge states, and the formation of GeOx nanoinclusions, which lead to an impressive solar cell (VOC) increase.

[Communication]
Sergio Giraldo, Markus Neuschitzer, Thomas Thersleff, Simón López-Marino, Yudania Sánchez, Haibing Xie, Mónica Colina, Marcel Placidi, Paul Pistor, Victor Izquierdo-Roca, Klaus Leifer, Alejandro Pérez-Rodríguez, Edgardo Saucedo
Adv. Energy Mater., August 07, 2015, DOI: 10.1002/aenm.201501070. Read article

Light-Induced Self-Poling Effect on Organometal Trihalide Perovskite Solar Cells for Increased Device Efficiency and Stability

Thumbnail image of graphical abstract

Continuous illumination of the organometal trihalide perovskite (OTP) devices can cause the photovoltaic poling effect, termed light-induced self-poling (LISP), which improves the stabilized device efficiency significantly. The effect of LISP is comparable to the poling by an externally applied electric field, which can be explained by the redistribution of ions/vacancies within the OTP layers driven by photovoltage-induced additional electric field.

[Communication]
Yehao Deng, Zhengguo Xiao, Jinsong Huang
Adv. Energy Mater., August 07, 2015, DOI: 10.1002/aenm.201500721. Read article

High-Performance Flexible Nanostructured Silicon Solar Modules with Plasmonically Engineered Upconversion Medium

Thumbnail image of graphical abstract

Plasmonically enhanced upconverion luminescence is exploited to improve the collection efficiency of above-bandgap, long-wavelength photons in ultrathin nanostructured silicon solar microcells. A composite solar module integrated with plasmonic silver nanostructures and upconversion printing medium enables the performance enhancement of surface-embedded 8 μm thick nanostructured silicon microcells by synergistic effects of plasmonically enhanced spectral upconversion, waveguiding, and fluorescence of upconversion nanocrystals.

[Full Paper]
Sung-Min Lee, Weigu Li, Purnim Dhar, Sergey Malyk, Yu Wang, Wonmok Lee, Alexander Benderskii, Jongseung Yoon
Adv. Energy Mater., August 03, 2015, DOI: 10.1002/aenm.201500761. Read article

Chemical Consequences of Alkali Inhomogeneity in Cu2ZnSnS4 Thin-Film Solar Cells

Thumbnail image of graphical abstract

Cu2ZnSnS4-based solar cells lacking an alkali diffusion barrier contain a non-uniform distribution of Na in the absorber layer. Samples containing Na “hot spots” have corresponding light beam induced current hot spots on comparable length scales. Na hot spots are also correlated with increased Cu in-diffusion with the underlying MoS2 layer and decreased diffusion of Cd to the back contact.

[Full Paper]
Talia Gershon, Cayla Hamann, Marinus Hopstaken, Yun Seog Lee, Byungha Shin, Richard Haight
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500922. Read article

Diketopyrrolopyrroles with a Distinct Energy Level Cascade for Efficient Charge Carrier Generation in Organic Solar Cells

Thumbnail image of graphical abstract

Tailored low molecular weight diketopyrrolopyrrole compounds with a precise energy level offset are synthesized by tuning the electron deficiency on the terminal aryl unit. Application of these compounds in cascade solar cells in combination with C60 leads to drastically increased short-circuit current densities and power conversion efficiencies.

[Full Paper]
Christian J. Mueller, Michael Brendel, Pia Ruckdeschel, Jens Pflaum, Mukundan Thelakkat
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500914. Read article

Charge Accumulation and Hysteresis in Perovskite-Based Solar Cells: An Electro-Optical Analysis

Thumbnail image of graphical abstract

Electric-field and charge accumulation-induced perovskite structure response are used to explain the hysteresis and ultraslow dynamics in CH3NH3PbI3 (MAPbI3) perovskite-based solar cells. The charge transfer efficiency at perovskite interfaces is found to be significant in determining the severity of the hysteresis in perovskite photovoltaic devices. The interface between perovskite and TiO­2 should be modified to minimize the hysteresis.

[Full Paper]
Bo Wu, Kunwu Fu, Natalia Yantara, Guichuan Xing, Shuangyong Sun, Tze Chien Sum, Nripan Mathews
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500829. Read article

A Comparative Study of the Effects of Nontoxic Chloride Treatments on CdTe Solar Cell Microstructure and Stoichiometry

Thumbnail image of graphical abstract

The effectiveness of various chlorides for activating CdTe solar cells is explored, in view of replacing the highly toxic CdCl2. It is shown that the chosen chloride must have a low dissociation energy (<4 eV) in order to catalyze the necessary metallurgical and stoichiometric changes. Significant insight into the Cl-activation mechanism is gained from the results.

[Full Paper]
Benjamin L. Williams, Jonathan D. Major, Leon Bowen, Wytze Keuning, Mariadriana Creatore, Ken Durose
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500554. Read article

Significance of Average Domain Purity and Mixed Domains on the Photovoltaic Performance of High-Efficiency Solution-Processed Small-Molecule BHJ Solar Cells

Thumbnail image of graphical abstract

Resonant soft X-ray scattering reveals a correlation between average domain purity and device fill-factor for an efficient solution processed small molecule 7,7′-(4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b′]dithiophene-2,6-diyl)bis(6-fluoro-4-(5′-hexyl-[2,2′-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole):phenyl-C71-butyric acid methyl ester (p-DTS(FBTTh2)2:PC71BM) system. The results show the requirement of optimal combination of phase purities to diminish bimolecular as well as geminate recombination.

[Full Paper]
Subhrangsu Mukherjee, Christopher M. Proctor, Guillermo C. Bazan, Thuc-Quyen Nguyen, Harald Ade
Adv. Energy Mater., July 20, 2015, DOI: 10.1002/aenm.201500877. Read article

11.2% Efficient Solution Processed Kesterite Solar Cell with a Low Voltage Deficit

Thumbnail image of graphical abstract

An 11.2% efficient kesterite solar cell is fabricated with a open circuit voltage (Voc ) deficit of only 0.57 V, possible by employing the three-stage annealing process. The reduced Voc deficit goes along with an increased minority carrier lifetime, low diode saturation current, and ideality factor, which are signatures of the semiconductor material with a low concentration of recombination centers.

[Communication]
Stefan G. Haass, Matthias Diethelm, Melanie Werner, Benjamin Bissig, Yaroslav E. Romanyuk, Ayodhya N. Tiwari
Adv. Energy Mater., July 17, 2015, DOI: 10.1002/aenm.201500712. Read article

Carrier-Selectivity-Dependent Charge Recombination Dynamics in Organic Photovoltaic Cells with a Ferroelectric Blend Interlayer

Thumbnail image of graphical abstract

The carrier selectivity at charge collecting interfaces in organic solar cells is demonstrated through the utilization of ferroelectric–semiconductor blend interlayers. Transient electrical measurements reveal the elongated charge carrier lifetime within devices with highly charge-selective contacts, which is well correlated with the asymmetric development of charge carrier density profiles in the photo­active layers.

[Full Paper]
Sae Byeok Jo, Min Kim, Dong Hun Sin, Jaewon Lee, Heung Gyu Kim, Hyomin Ko, Kilwon Cho
Adv. Energy Mater., July 15, 2015, DOI: 10.1002/aenm.201500802. Read article

Synergistic Impact of Solvent and Polymer Additives on the Film Formation of Small Molecule Blend Films for Bulk Heterojunction Solar Cells

Thumbnail image of graphical abstract

In situ measurement shows that polystyrene (PS) and diiodooctane (DIO) additives promote donor crystallite formation synergistically, on different time scales and through different mechanisms. PS-rich films retain solvent, promoting phase separation early in the casting process. Meanwhile, the low vapor pressure of DIO extends the time scale of film evolution and allows for crystalline rearrangement of the donor phase after casting.

[Full Paper]
Caitlin McDowell, Maged Abdelsamie, Kui Zhao, Detlef-M. Smilgies, Guillermo C. Bazan, Aram Amassian
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201501121. Read article

Similar or Totally Different: the Adjustment of the Twist Conformation Through Minor Structural Modification, and Dramatically Improved Performance for Dye-Sensitized Solar Cell

Thumbnail image of graphical abstract

The sensitizer configuration of the acceptor and anchoring group affects electron injection and recombination in the corresponding dye-sensitized solar cells. The partial broken conjugation shows an efficient approach to enhancing photovoltaic performance after a systematical investigation of seven similar-looking sensitizers.

[Full Paper]
Zhaofei Chai, Mei Wu, Manman Fang, Sushu Wan, Ting Xu, Runli Tang, Yujun Xie, Anyi Mei, Hongwei Han, Qianqian Li, Zhen Li
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201500846. Read article

Control of Charge Dynamics via Use of Nonionic Phosphonate Chains and Their Effectiveness for Inverted Structure Solar Cells

Thumbnail image of graphical abstract

Nonionic phosphonate side chains are introduced into an isoindigo-based model polymer in order to induce a high compatibility at hybrid organic/inorganic interfaces, while controlling charge transport/collection and recombination dynamics in inverted polymer solar cells. This approach can bring ≈20% improvement in efficiency when compared to a nonmodified control analog.

[Full Paper]
Gyoungsik Kim, Seyeong Song, Jungho Lee, Taehyo Kim, Tack Ho Lee, Bright Walker, Jin Young Kim, Changduk Yang
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201500844. Read article

Cation Substitution of Solution-Processed Cu2ZnSnS4 Thin Film Solar Cell with over 9% Efficiency

Thumbnail image of graphical abstract

9.2%-efficiency Cu2ZnSnS4 (CZTS)-based pure sulfide thin film solar cells are fabricated by replacing partial Zn with Cd via low-cost sol–gel method. The appropriate incorporation of Cd into CZTS thin films can adjust band gaps, improve microstructure, and reduce the ZnS secondary phase in CZTS thin film, resulting in significant improvement of efficiencies.

[Full Paper]
Zhenghua Su, Joel Ming Rui Tan, Xianglin Li, Xin Zeng, Sudip Kumar Batabyal, Lydia Helena Wong
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201500682. Read article

High-Performance Semitransparent Perovskite Solar Cells with 10% Power Conversion Efficiency and 25% Average Visible Transmittance Based on Transparent CuSCN as the Hole-Transporting Material

Thumbnail image of graphical abstract

High-performance planar heterojunction perovskite (CH3NH3PbI3) solar cell (PVSC) is demonstrated by utilizing CuSCN as a hole-transporting layer. Efficient hole-transport and hole-extraction at the CuSCN/CH3NH3PbI3 interface facilitate the PVSCs to reach 16% power conversion efficiency (PCE). In addition, excellent transparency of CuSCN also enables high-performance semitransparent PVSC (10% PCE and 25% average visible transmittance) to be realized.

[Communication]
Jae Woong Jung, Chu-Chen Chueh, Alex K.-Y. Jen
Adv. Energy Mater., July 06, 2015, DOI: 10.1002/aenm.201500486. Read article

Highly Efficient Solution-Processed Poly(3,4-ethylenedio-xythiophene):Poly(styrenesulfonate)/Crystalline–Silicon Heterojunction Solar Cells with Improved Light-Induced Stability

Thumbnail image of graphical abstract

p-Toluenesulfonic acid/dimethyl sulfoxide (PTSA/DMSO)-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/crystalline-silicon (c-Si) hybrid solar cells with a solution-processed anti-reflection coating of TiO2 exhibit a record power conversion efficiency of 15.5%. Additionally, the performance stability of the hybrid device for both air storage and light exposure is improved due to removal of the PSS matrix from the PTSA/DMSO-treated PEDOT:PSS thin film.

[Communication]
Qiming Liu, Ryo Ishikawa, Shuji Funada, Tatsuya Ohki, Keiji Ueno, Hajime Shirai
Adv. Energy Mater., June 29, 2015, DOI: 10.1002/aenm.201500744. Read article

High-Performance Ta2O5/Al-Doped Ag Electrode for Resonant Light Harvesting in Efficient Organic Solar Cells

Thumbnail image of graphical abstract

A high-performance Ta2O5/Al-doped Ag electrode is presented by inserting a di­electric layer of Ta2O5 underneath ultrathin Al-doped Ag film. Such an Al-doped Ag can be as thin as 4 nm with excellent transparency. Fine light management by tuning the Ta2O5 thickness leads to enhancement of photocurrent and power conversion efficiency for the Ta2O5/Al-doped Ag-based organic solar cells due to the optical cavity effect, superior to their indium tin oxide counterparts.

[Full Paper]
Dewei Zhao, Cheng Zhang, Hyunsoo Kim, L. Jay Guo
Adv. Energy Mater., June 25, 2015, DOI: 10.1002/aenm.201500768. Read article

© Wiley-VCH 2015.