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Acceptor End‐Capped Oligomeric Conjugated Molecules with Broadened Absorption and Enhanced Extinction Coefficients for High‐Efficiency Organic Solar Cells
Author(s) -
Yuan Liu,
Lu Kun,
Xia Benzheng,
Zhang Jianqi,
Wang Zhen,
Wang Zaiyu,
Deng Dan,
Fang Jin,
Zhu Lingyun,
Wei Zhixiang
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201600512
Subject(s) - materials science , organic solar cell , conjugated system , absorption (acoustics) , extinction (optical mineralogy) , acceptor , photochemistry , molar absorptivity , molecule , polymer solar cell , energy conversion efficiency , optoelectronics , organic chemistry , polymer , optics , chemistry , composite material , physics , condensed matter physics
Acceptor end‐capping of oligomeric conjugated molecules is found to be an effective strategy for simultaneous spectral broadening, extinction coefficient enhancement, and energy level optimization, resulting in profoundly enhanced power conversion efficiencies (of 9.25% and 8.91%) compared to the original oligomers. This strategy is effective in overcoming the absorption disadvantage of oligomers and small molecules due to conjugation limitation.