High-performance fullerene-free polymer solar cells with 6.31% efficiency

被引:603
作者
Lin, Yuze [1 ,3 ]
Zhang, Zhi-Guo [1 ]
Bai, Huitao [1 ]
Wang, Jiayu [2 ]
Yao, Yuehan [2 ]
Li, Yongfang [1 ]
Zhu, Daoben [1 ]
Zhan, Xiaowei [2 ]
机构
[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China
[2] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
SMALL-MOLECULE; ELECTRON-ACCEPTOR; TRANSPORT; CATHODE; DESIGN;
D O I
10.1039/c4ee03424d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A nonfullerene electron acceptor (IEIC) based on indaceno[1,2-b:5,6-b']dithiophene and 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile was designed and synthesized. IEIC exhibited good thermal stability, strong absorption in the 500-750 nm region with an extinction coefficient of 1.1 x 10(5) M-1 cm(-1) at 672 nm, deep LUMO energy level (-3.82 eV) close to those of fullerenes, and a relatively high electron mobility of 2.1 x 10(-4) cm(2) V-1 s(-1). Fullerene-free polymer solar cells (PSCs) based on the blends of the IEIC acceptor and a low-bandgap polymer donor PTB7-TH, using a perylene diimide derivative as a cathode interlayer, showed power conversion efficiencies (PCEs) of up to 6.31%, which is among the best PCEs reported for fullerene-free PSCs.
引用
收藏
页码:610 / 616
页数:7
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