D-A Copolymers Based on a Pentacyclic Acceptor Unit and a 3,3′-Difluoro2,2′-bithiophene for Solar Cells

被引:4
作者
Cao, Jia-min [1 ]
Qian, Liu [1 ]
He, Dan [1 ]
Xiao, Zuo [1 ]
Ding, Li-ming [1 ]
机构
[1] Chinese Acad Sci, Natl Ctr Nanosci & Technol, Key Lab Nanosyst & Hierarch Fabricat, Ctr Excellence Nanosci, Beijing 100190, Peoples R China
基金
中国国家自然科学基金;
关键词
D-A copolymers; Fluorination; Open-circuit voltage; Polymer solar cells; PHOTOVOLTAIC APPLICATIONS; BUILDING-BLOCK; POLYMER; PERFORMANCE; AGGREGATION; EFFICIENCY;
D O I
10.1007/s10118-017-1996-4
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A D-A copolymer, P2FBTTPTI, was developed by copolymerizing a pentacyclic acceptor unit, thieno[2',3':5,6]pyrido[3,4-g]thieno[3,2-c]isoquinoline-5,11(4H,10H)-dione (TPTI), with 3,3'-difluoro-2,2'-bithiophene (2FBT). P2FBTTPTI possessed a low highest occupied molecular orbital (HOMO) energy level (-5.50 eV) and a good hole mobility (4.14 x 10(-4) cm(2).V-1.s(-1)). P2FBTTPTI:PC71BM solar cells gave a decent power conversion efficiency (PCE) of 7.64% and a high open-circuit voltage (V-oc) of 0.95 V.
引用
收藏
页码:1457 / 1462
页数:6
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