Tailoring side chains of low band gap polymers for high efficiency polymer solar cells

被引:85
作者
Li, Weiwei [1 ,2 ]
Qin, Ruiping [3 ]
Zhou, Yi [2 ]
Andersson, Mattias [2 ]
Li, Fenghong [2 ]
Zhang, Chi [1 ]
Li, Binsong [1 ]
Liu, Zhengping [3 ]
Bo, Zhishan [1 ]
Zhang, Fengling [2 ]
机构
[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
[2] Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden
[3] Beijing Normal Univ, Coll Chem, Beijing 100875, Peoples R China
基金
瑞典研究理事会;
关键词
Organic solar cell; Side chains; Low band gap; MOLECULAR-WEIGHT; PHOTOVOLTAIC PROPERTIES; PERFORMANCE; COPOLYMERS; POLY(3-HEXYLTHIOPHENE); THIOPHENE; UNITS; BENZOTHIADIAZOLE;
D O I
10.1016/j.polymer.2010.05.015
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
High efficiency organic solar cells (OSCs) require conjugated polymers with a low band gap, broad absorption in visible and IR region, high carrier mobility, and relatively high molecular weight as p-type donor materials. Flexible side chains on the rigid polymer backbone are crucial for the solubility of conjugated polymers. In this work, four polymers with the main chain structure of fluorene-thiophene-benzothiadiazole-thiophene and flexible side chains located on fluorene, thiophene, and benzothiadiazole moiety, respectively, have been synthesized by Suzuki-Miyaura-Schluter polycondensation. Photovoltaic device measurements with a device configuration of ITO/polymer:PC71BM blends/LiF/Al show that P1 carrying octyloxy chains on benzothiadiazole rings gives the best performance, with a power conversion efficiency of 3.1%. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3031 / 3038
页数:8
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