A series of simple oligomer-like small molecules based on oligothiophenes for solution-processed solar cells with high efficiency

Journal of the American Chemical Society
Bin KanYongsheng Chen

Abstract

A series of acceptor-donor-acceptor simple oligomer-like small molecules based on oligothiophenes, namely, DRCN4T-DRCN9T, were designed and synthesized. Their optical, electrical, and thermal properties and photovoltaic performances were systematically investigated. Except for DRCN4T, excellent performances were obtained for DRCN5T-DRCN9T. The devices based on DRCN5T, DRCN7T, and DRCN9T with axisymmetric chemical structures exhibit much higher short-circuit current densities than those based on DRCN6T and DRCN8T with centrosymmetric chemical structures, which is attributed to their well-developed fibrillar network with a feature size less than 20 nm. The devices based on DRCN5T/PC71BM showed a notable certified power conversion efficiency (PCE) of 10.10% under AM 1.5G irradiation (100 mW cm(-2)) using a simple solution spin-coating fabrication process. This is the highest PCE for single-junction small-molecule-based organic photovoltaics (OPVs) reported to date. DRCN5T is a rather simpler molecule compared with all of the other high-performance molecules in OPVs to date, and this might highlight its advantage in the future possible commercialization of OPVs. These results demonstrate that a fine and balanced modification/design...Continue Reading

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Citations

Aug 20, 2015·Chemical Reviews·Letian DouYang Yang
Aug 12, 2015·ACS Applied Materials & Interfaces·Shi-Xin SunHao-Li Zhang
Oct 23, 2015·Organic Letters·Takayuki YamauchiToshiaki Murai
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Oct 13, 2016·ACS Applied Materials & Interfaces·Liangang XiaoXunjin Zhu
Jan 14, 2017·Journal of the American Chemical Society·Liyan YangJianhui Hou
Feb 12, 2017·ACS Applied Materials & Interfaces·Bright WalkerChangduk Yang
Apr 11, 2017·Physical Chemistry Chemical Physics : PCCP·Xunfan LiaoYiwang Chen
Apr 25, 2017·Chemical Communications : Chem Comm·Tianqi LaiYong Cao
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Jun 7, 2017·Journal of the American Chemical Society·Niklas KellerThomas Bein
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Jan 18, 2017·Physical Chemistry Chemical Physics : PCCP·Rocío DomínguezFernando Langa
Jan 18, 2017·Physical Chemistry Chemical Physics : PCCP·Shuixing LiHongzheng Chen
Nov 6, 2015·Chemical Communications : Chem Comm·Wang NiYongsheng Chen
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