Synthesis and photovoltaic properties of conjugated polymers with an asymmetric 4-(2-ethylhexyloxy)-8-(2-ethylhexylthio)benzo[1,2-b:4,5-b′]dithiophene unit

被引：9
作者：
Huang, Yuanshuai
Wu, Fen
Zhang, Min
Mei, Suli
Shen, Ping
Tan, Songting [1 ]
机构：
[1] Xiangtan Univ, Coll Chem, Xiangtan 411105, Peoples R China
来源：
DYES AND PIGMENTS | 2015年 / 115卷
基金：
中国国家自然科学基金;
关键词：
Conjugated polymer; Photovoltaic properties; Solar cells; Synthesis; Side group; Benzodithiophene; DONOR-ACCEPTOR COPOLYMERS; SOLAR-CELLS; SIDE-CHAINS; HIGH-EFFICIENCY; TRIPHENYLAMINE; POLYTHIOPHENES;
D O I：
10.1016/j.dyepig.2014.12.012
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Two novel copolymers containing an asymmetric 4-(2-ethylhexyloxy)-8-(2-ethylhexylthio)benzo[1,2-b:4,5-b']dithiophene and different conjugated side groups were designed and synthesized for polymer solar cell applications. The thermal, optical, and electrochemical properties were investigated by thermal gravimetric analysis, UV Vis absorption, and cyclic voltammetry, respectively. The two copolymers showed a good thermal stability and solubility in common organic solvents, and relatively deep highest occupied molecular orbital (HOMO) energy levels with the values of 5.56 eV for 5,6-difluoro-benzodiathiazole-based copolymer and 5.48 eV for isoindigo-based copolymer. The polymer photovoltaic devices based on 5,6-difluoro-benzodiathiazole-based polymer/phenyl-C-71-butyric acid methyl ester exhibited a high open circuit voltage (V-oc) of 0.92 V and the power conversion efficiency of 5.0%. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：58 / 66
页数：9
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