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

页码：220 / 228

页数：9

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