Rhodanine flanked indacenodithiophene as non-fullerene acceptor for efficient polymer solar cells

被引：43
|
作者：
Jia, Boyu [1 ]
Wu, Yao [1 ]
Zhao, Fuwen [2 ]
Yan, Cenqi [1 ]
Zhu, Siya [1 ]
Cheng, Pei [2 ]
Mai, Jiangquan [3 ]
Lau, Tsz-Ki [3 ]
Lu, Xinhui [3 ]
Su, Chun-Jen [4 ]
Wang, Chunru [2 ]
Zhan, Xiaowei [1 ]
机构：
[1] Peking Univ, Dept Mat Sci & Engn, Coll Engn, Key Lab Polymer Chem & Phys,Minist Educ, Beijing 100871, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
[3] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[4] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
来源：
SCIENCE CHINA-CHEMISTRY | 2017年 / 60卷 / 02期
基金：
中国国家自然科学基金;
关键词：
organic solar cell; non-fullerene acceptor; fused-ring electron acceptor; indacenodithiophene; rhodanine; POWER CONVERSION EFFICIENCY; HIGH-PERFORMANCE; ELECTRON-ACCEPTOR; ORGANIC PHOTOVOLTAICS; ABSORPTION; DONOR; PAIR;
D O I：
10.1007/s11426-016-0336-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A fused-ring electron acceptor IDT-2BR1 based on indacenodithiophene core with hexyl side-chains flanked by benzothiadiazole rhodanine was designed and synthesized. In comparison with its counterpart with hexylphenyl side-chains (IDT-2BR), IDT-2BR1 exhibits higher highest occupied molecular orbital (HOMO) energy but similar lowest unoccupied molecular orbital (LUMO) energy (IDT-2BR1: HOMO=-5.37 eV, LUMO=-3.67 eV; IDT-2BR: HOMO=-5.52 eV, LUMO=-3.69 eV), red-shifted absorption and narrower bandgap. IDT-2BR1 has higher electron mobility (2.2x10(-3) cm(2) V-1 s(-1)) than IDT-2BR (3.4x10(-4) cm(2) V-1 s(-1)) due to the reduced steric hindrance and ordered molecular packing. Fullerene-free organic solar cells based on PTB7-Th:IDT-2BR1 yield power conversion efficiencies up to 8.7%, higher than that of PTB7-Th:IDT-2BR (7.7%), with a high open circuit voltage of 0.95 V and good device stability.
引用
收藏
页码：257 / 263
页数：7
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