Novel high-performance photovoltaic D-A conjugated polymers bearing 1,2-squaraine moieties as electron-deficient units

被引：22
|
作者：
Yang, Daobin [1 ]
Guang, Zhiqiang [2 ]
Yang, Lin [1 ]
Huang, Yan [1 ]
Wei, Qingjian [1 ]
Lu, Zhiyun [1 ]
Yu, Junsheng [2 ]
机构：
[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China
[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Sch Optoelect Informat, Chengdu 610054, Peoples R China
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2012年 / 105卷
基金：
中国国家自然科学基金;
关键词：
Photovoltaic; Conjugated polymers; 1,2-squaraines; Solar cells; HETEROJUNCTION SOLAR-CELLS; DONOR-ACCEPTOR COPOLYMERS; OPEN-CIRCUIT VOLTAGE; SQUARAINE; BANDGAP; ALKYL; STRATEGY; LEVEL;
D O I：
10.1016/j.solmat.2012.06.006
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Two D-A type conjugated polymers bearing 3,4-dithiophenyl-1,2-squaraine as acceptor segment, thiophene and benzo[1,2-b;4,5-b']dithiophene (BDT) as donor moieties, namely. PTTST and PBDTTST, are synthesized by Stille coupling reaction. Compared with their reference polymer PBDTTT without 1,2-squaraine unit, both PTTST and PBDTTST possess more extended absorption in the vis-NIR region of 600-800 nm and lowered HOMO energy levels of 0.1-0.2 eV. Bulk-heterojunction PSC with PBDTTST as p-type material shows high performance with the best PCE value of 1.26% (V-oc = 0.87 V, J(sc) = 3.81 mA/cm(2), FF = 0.38) under irradiation of 100 mW/cm(2), while that of PBDTTT-based PSC is 0.36%. Therefore, 1,2-squaraine is a promising electron-acceptor component for construction of high performance photovoltaic D-A type conjugated photovoltaic polymers. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：220 / 228
页数：9
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