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Over the last
20 years, tremendous progress has been achieved in the design and
fabrication of organic electronic devices. High performance LEDs,
transistors, and memory devices—the materials science journals have it
all! Follow the continuing progress and the latest breakthroughs in the
field of organic electronics in our top-quality journals.
Daniele
Braga, Gilles
Horowitz
High-Performance
Organic Field-Effect Transistors
Adv. Mater., DOI:
10.1002/adma.200802733
Boseok Kang, Honggi Min, Unsuk Seo, Junghwi Lee, Namwoo Park, Kilwon Cho, Hwa Sung Lee
Directly Drawn Organic Transistors by Capillary Pen: A New Facile Patterning Method using Capillary Action for Soluble Organic Materials [Communication]
A capillary pen drawing technique, developed as a new patterning methodology for the large-area patterning and fabrication of organic electronics, provides several advantages over conventional approaches: the method is simple and versatile, there are no restrictions on the patterning shapes that could be produced, and the method can be tailored to a variety of substrates.
Cheng Gu, Youchun Chen, Zhongbo Zhang, Shanfeng Xue, Shuheng Sun, Kai Zhang, Chengmei Zhong, Huanhuan Zhang, Yuyu Pan, Ying Lv, Yanqin Yang, Fenghong Li, Suobo Zhang, Fei Huang, Yuguang Ma
Electrochemical Route to Fabricate Film-Like Conjugated Microporous Polymers and Application for Organic Electronics [Communication]
Film-like conjugated microporous polymers (CMPs) are fabricated by the novel strategy of carbazole-based electropolymerization. The CMP film storing a mass of counterions acting as an anode interlayer provides a significant power-conversion efficiency of 7.56% in polymer solar cells and 20.7 cd A−1 in polymer light-emitting diodes, demonstrating its universality and potential as an electrode interlayer in organic electronics.
Tomoyuki Yokota, Kazunori Kuribara, Takeyoshi Tokuhara, Ute Zschieschang, Hagen Klauk, Kazuo Takimiya, Yuji Sadamitsu, Masahiro Hamada, Tsuyoshi Sekitani, Takao Someya
Flexible Low-Voltage Organic Transistors with High Thermal Stability at 250 °C [Communication]
Low-operating-voltage flexible organic thin-film transistors with high thermal stability using DPh-DNTT and SAM gate dielectrics are reported. The mobility of the transistors are decreased by 23% after heating to 250 °C for 30 min. Furthermore, flexible organic pseudo-CMOS inverter circuits, which are functional after heating to 200 °C.
Sonja Geib, Ute Zschieschang, Marcel Gsänger, Matthias Stolte, Frank Würthner, Hubert Wadepohl, Hagen Klauk, Lutz H. Gade
Core-Brominated Tetraazaperopyrenes as n-Channel Semiconductors for Organic Complementary Circuits on Flexible Substrates [Full Paper]
The preparation of brominated tetraazaperopyrenes, their crystal structures, and their electrochemical properties are reported. These N-heterocyclic peropyrene derivatives are well-suited materials for the preparation of n-channel conducting organic thin-film transistors either by vacuum deposition or by solution processing. Additionally, the fabrication of a complementary ring oscillator on a flexible substrate is described.
Adv. Funct. Mater., Mar 08, 2013, DOI: 10.1002/adfm.201203600
Weiwei Li, Koen H. Hendriks, W. S. Christian Roelofs, Youngju Kim, Martijn M. Wienk, René A. J. Janssen
Efficient Small Bandgap Polymer Solar Cells with High Fill Factors for 300 nm Thick Films [Communication]
A high molecular weight conjugated polymer based on alternating electron-rich and electron deficient fused ring systems provides efficient polymer solar cells when blended with C60 and C70 fullerene derivatives. The morphology of the new polymer/fullerene blend reduces bimolecular recombination and allows reaching high fill factors and power conversion efficiencies for films up to 300 nm thickness.
Christopher M. Proctor, Chunki Kim, Dieter Neher, Thuc-Quyen Nguyen
Nongeminate Recombination and Charge Transport Limitations in Diketopyrrolopyrrole-Based Solution-Processed Small Molecule Solar Cells [Full Paper]
Wang Zhang Yuan, Yeqiang Tan, Yongyang Gong, Ping Lu, Jacky W. Y. Lam, Xiao Yuan Shen, Cunfang Feng, Herman H-Y. Sung, Yawei Lu, Ian D. Williams, Jing Zhi Sun, Yongming Zhang, Ben Zhong Tang
Synergy between Twisted Conformation and Effective Intermolecular Interactions: Strategy for Efficient Mechanochromic Luminogens with High Contrast [Communication]
A strategy towards efficient mechanochromic luminogens with high contrast is developed. The twisted propeller-like conformations and effective intermolecular interactions not only endow the luminogens with AIE characteristics and high efficiency in the crystalline state, but also render them to undergo conformational planarization and disruption in intermolecular interactions upon mechanical stimuli, resulting in remarkable changes in emission wavelength and efficiency.
Jun Yun Kim, Takuma Yasuda, Yu Seok Yang, Chihaya Adachi
Bifunctional Star-Burst Amorphous Molecular Materials for OLEDs: Achieving Highly Efficient Solid-State Luminescence and Carrier Transport Induced by Spontaneous Molecular Orientation [Communication]
Bifunctional star-burst amorphous molecular materials displaying both efficient solid-state luminescence and high hole-transport properties are developed in this study. A high external electroluminescence quantum efficiency up to 5.9% is attained in OLEDs employing the developed amorphous materials. It is revealed that the spontaneous horizontal orientation of these light-emitting molecules in their molecular-condensed states leads to a remarkable enhancement of the electroluminescence efficiencies and carrier-transport properties.
Li Ping Lu, Chris E. Finlayson, Dinesh Kabra, Sebastian Albert-Seifried, Myoung Hoon Song, Remco W. A. Havenith, Guoli Tu, Wilhelm T. S. Huck, Richard H. Friend
The Influence of Side-Chain Position on the Optoelectronic Properties of a Red-Emitting Conjugated Polymer [Full Paper]
The optical and electrical properties of the organic semiconductor F8TBT are tailored by changing the position of the alkyl side chains. A conventional form of F8TBT (F8TBT-out) and a form with varied alkyl side-chain position, F8TBT-in, are directly compared in terms of optical properties and light-emitting-diode device performance. This illustrates how the placement of side chains has a very important role for device optimization.
Jyun-Fong Jheng, Yu-Ying Lai, Jhong-Sian Wu, Yi-Hsiang Chao, Chien-Lung Wang, Chain-Shu Hsu
Influences of the Non-Covalent Interaction Strength on Reaching High Solid-State Order and Device Performance of a Low Bandgap Polymer with Axisymmetrical Structural Units [Communication]
A high organic field-effect transistor mobility (0.29 cm2V−1s−1) and bulk-heterojunction polymer solar cell performance (PCE of 6.82%) have been achieved in a low bandgap alternating copolymer consisting of axisymmetrical structural units, 5,6-difluorobenzo-2,1,3-thiadiazole. Introducing the fluorine substituents enhanced intermolecular interaction and improved the solid-state order, which consequently resulted in the highest device performances among the 2,1,3-thiadiazole-quarterthiophene based alternating copolymers.
Daniela Donhauser, Martin Pfannmöller, Levin Dieterle, Katrin Schultheiß, Rasmus R. Schröder, Wolfgang Kowalsky, Michael Kröger
Observation of Filamentous Nanostructures in Organic-Inorganic Composite Thin Films Deposited by Co-Evaporation [Full Paper]
Organic-inorganic composites fabricated via co-evaporation of two materials reveal a filamentous nanostructure with filaments preferentially oriented perpendicular to the substrate plane. This growth process can be controlled by changing the substrate temperature so that for films evaporated on cooled substrates no filament growth can be detected.
Scott Himmelberger, Javier Dacuña, Jonathan Rivnay, Leslie H. Jimison, Thomas McCarthy-Ward, Martin Heeney, Iain McCulloch, Michael F. Toney, Alberto Salleo
Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors [Full Paper]
The effects of confinement on the morphology and charge transport properties of poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) are studied using quantitative X-ray diffraction and field-effect transistor measurements. Polymer crystallinity is found to limit charge transport in the thinnest films while crystalline texture and intergrain connectivity modulate carrier mobility in thicker films.
Michele Sessolo, Dion Khodagholy, Jonathan Rivnay, Fabien Maddalena, Melanie Gleyzes, Esther Steidl, Bruno Buisson, George G. Malliaras
Easy-to-Fabricate Conducting Polymer Microelectrode Arrays [Communication]
A simple and versatile fabrication process is used to define conducting polymer microelectrode arrays (MEAs), patterning at the same time the recording electrodes as well as the insulating layer. Thanks to the low impedance of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) electrodes, these MEAs allow in vitro recording of action potentials from rat hippocampus slices.
Johannes Krantz, Tobias Stubhan, Moses Richter, Stefanie Spallek, Ivan Litzov, Gebhard J. Matt, Erdmann Spiecker, Christoph J. Brabec
Spray-Coated Silver Nanowires as Top Electrode Layer in Semitransparent P3HT:PCBM-Based Organic Solar Cell Devices [Full Paper]
Silver nanowires (Ag NWs) are introduced as a viable alternative to thermally evaporated silver metal top electrodes. Solution-processable Ag NWs are spray-deposited as highly conductive and transparent electrode layers in semitransparent poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) solar cell devices. Their optical properties in semitransparent organic photovoltaic devices are presented and they show comparable performance to reference devices.
Se Hyun Kim, Kihyon Hong, Wei Xie, Keun Hyung Lee, Sipei Zhang, Timothy P. Lodge, C. Daniel Frisbie
Electrolyte-Gated Transistors for Organic and Printed Electronics [Review]
This Review discusses recent progress in electrolyte-gated transistors (EGTs). EGTs employ a high-capacitance electrolyte as the gate insulator layer, which affords low voltage operation and high drive currents. The Review covers EGT operation mechanisms, the development of new solid electrolyte materials for use in EGTs and emerging applications of these devices in printed digital circuits, flexible displays, biosensors, and fundamental transport measurements.
René A. J. Janssen, Jenny Nelson
Factors Limiting Device Efficiency in Organic Photovoltaics [Review]
The power conversion efficiency of donor-acceptor organic solar cells now reaches over 10% in single-junction and tandem cells. Empirical models suggest that the maximum efficiency may be limited at 10–12%, yet recent, more refined detailed-balance models indicate that, under favorable conditions, efficiencies in the range of 20–24% can be achieved.
Christian B. Nielsen, Mathieu Turbiez, Iain McCulloch
Recent Advances in the Development of Semiconducting DPP-Containing Polymers for Transistor Applications [Review]
In this Progress Report, the most recent literature on diketopyrrolopyrrole-containing polymers developed for field-effect transistor applications is reviewed and the structure–property relations of importance for achieving high performance n- and p-type transistor materials are discussed in detail.
Daniel Lumpi, Ernst Horkel, Felix Plasser, Hans Lischka, Johannes Fröhlich
Synthesis, Spectroscopy, and Computational Analysis of Photoluminescent Bis(aminophenyl)-Substituted Thiophene Derivatives [Article]
A series of thiophene derivatives is analyzed with regard to their luminescent properties. Calculations at the TDDFT level and a semiclassical approach for vibrational broadening are applied to predict the emission spectra. The use of the M06-2X functional and inclusion of solvent effects with the state-specific formulation of the polarizable continuum model solvent model gives results that are in good agreement with the experimental data.
Carlos A. Zuniga, Jassem Abdallah, Wojciech Haske, Yadong Zhang, Igor Coropceanu, Stephen Barlow, Bernard Kippelen, Seth R. Marder
Crosslinking Using Rapid Thermal Processing for the Fabrication of Efficient Solution-Processed Phosphorescent Organic Light-Emitting Diodes [Communication]
Copolymers with a triscarbazole hole-transport group and an oxetane or benzocyclobutene crosslinkable group can be readily thermally crosslinked on timescales of 30 min or less, with rapid thermal processing (RTP) being highly effective for this purpose. Devices with RTP-crosslinked hole-transport layers and spin-coated emissive layers exhibit high external quantum efficiencies of up to 15%.
Eric Daniel Głowacki, Mihai Irimia-Vladu, Martin Kaltenbrunner, Jacek Gsiorowski, Matthew S. White, Uwe Monkowius, Giuseppe Romanazzi, Gian Paolo Suranna, Piero Mastrorilli, Tsuyoshi Sekitani, Siegfried Bauer, Takao Someya, Luisa Torsi, Niyazi Serdar Sariciftci
Hydrogen-Bonded Semiconducting Pigments for Air-Stable Field-Effect Transistors [Communication]
Extensive intramolecular π-conjugation is considered to be requisite in the design of organic semiconductors. Here, two inkjet pigments, epindolidione and quinacridone, that break this design rule are explored. These molecules afford intermolecular π-stacking reinforced by hydrogen-bonding bridges. Air-stable organic field effect transistors are reported that support mobilities up to 1.5 cm2/Vs with T80 lifetimes comparable with the most stable reported organic semiconducting materials.
Rycel L. Uy, Samuel C. Price, Wei You
Structure-Property Optimizations in Donor Polymers via Electronics, Substituents, and Side Chains Toward High Efficiency Solar Cells [Feature Article]
Structure-property correlations currently lacking in organic photovoltaics are examined. To gain a better understanding of such relationships and ultimately attain higher efficiencies, researchers should look toward employing LUMO-reducing moieties and effectively using electron-withdrawing and side-chain substitutents to effectively tune polymer–PCBM interactions.
Yuze Lin, Haijun Fan, Yongfang Li, Xiaowei Zhan
Thiazole-Based Organic Semiconductors for Organic Electronics [Progress Report]
Thiazole is an electron-accepting heterocycle due to electron-withdrawing nitrogen of imine, several thiazole related moieties have been widely introduced into organic semiconductors and yielded high performance in organic electronic devices. This article reviews recent developments in thiazole, bithiazole, thiazolothiazole and benzobisthiazole-based small molecule and polymer semiconductors for applications in organic field-effect transistors, solar cells and light-emitting diodes.
Dario Natali, Mario Caironi
Charge Injection in Solution-Processed Organic Field-Effect Transistors: Physics, Models and Characterization Methods [Review]
A comprehensive overview on the subject of current injection in organic thin-film transistors is given: physical principles concerning energy level (mis)alignment at interfaces, models describing charge injection, technologies for interface tuning, and techniques for characterizing devices. Finally, a survey of the most recent accomplishments in the field is given.
© Wiley-VCH 2011.
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