Fused Hexacyclic Nonfullerene Acceptor with Strong Near-Infrared Absorption for Semitransparent Organic Solar Cells with 9.77% Efficiency

被引：384

作者：

Wang, Wei ^{[1
]}

Yan, Cenqi ^{[1
]}

Lau, Tsz-Ki ^{[2
]}

Wang, Jiayu ^{[1
]}

Liu, Kuan ^{[1
]}

Fan, Yan ^{[1
]}

Lu, Xinhui ^{[2
]}

Zhan, Xiaowei ^{[1
]}

机构：

[1] Peking Univ, Minist Educ, Coll Engn, Dept Mat Sci & Engn,Key Lab Polymer Chem & Phys, Beijing 100871, Peoples R China

[2] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

来源：

ADVANCED MATERIALS | 2017年 / 29卷 / 31期

关键词：

dithienocyclopentathieno[3,2-b]thiophene; fused-ring electron acceptors; near-infrared absorption; nonfullerene acceptors; organic solar cells; SMALL MOLECULAR ACCEPTOR; NON-FULLERENE; ELECTRON-ACCEPTORS; PHOTOVOLTAIC APPLICATIONS; 3D STRUCTURE; POLYMER; COPOLYMER; CATHODE; DESIGN; LAYER;

D O I：

10.1002/adma.201701308

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A fused hexacyclic electron acceptor, IHIC, based on strong electron-donating group dithienocyclopentathieno[ 3,2-b]thiophene flanked by strong electron-withdrawing group 1,1-dicyanomethylene-3-indanone, is designed, synthesized, and applied in semitransparent organic solar cells (ST-OSCs). IHIC exhibits strong near-infrared absorption with extinction coefficients of up to 1.6 x 10(5) m(-1) cm(-1), a narrow optical bandgap of 1.38 eV, and a high electron mobility of 2.4 x 10(-3) cm(2) V-1 s(-1). The ST-OSCs based on blends of a narrow-bandgap polymer donor PTB7-Th and narrow-bandgap IHIC acceptor exhibit a champion power conversion efficiency of 9.77% with an average visible transmittance of 36% and excellent device stability; this efficiency is much higher than any single-junction and tandem ST-OSCs reported in the literature.

引用

页数：7

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