Manipulating backbone structure with various conjugated spacers to enhance photovoltaic performance of D-A-type two-dimensional copolymerse

被引：39

作者：

Dang, Dongfeng ^{[1
]}

Xiao, Manjun ^{[1
,3
]}

Zhou, Pei ^{[1
]}

Shi, Junwei ^{[1
]}

Tao, Qiang ^{[1
,2
]}

Tan, Hua ^{[1
]}

Wang, Yafei ^{[1
]}

Bao, Xichang ^{[3
]}

Liu, Yu ^{[1
]}

Wang, Ergang ^{[2
]}

Yang, Renqiang ^{[3
]}

Zhu, Weiguo ^{[1
]}

机构：

[1] Xiangtan Univ, Minist Educ, Dept Chem, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China

[2] Chalmers Univ Technol, Dept Chem & Biol Engn Polymer Technol, SE-41296 Gothenburg, Sweden

[3] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China

来源：

ORGANIC ELECTRONICS | 2014年 / 15卷 / 11期

基金：

瑞典研究理事会; 湖南省自然科学基金; 中国国家自然科学基金;

关键词：

Polymer solar cells; Two-dimensional copolymers; Conjugated spacers; Photovoltaic properties; POLYMER SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; POWER CONVERSION EFFICIENCY; ORBITAL ENERGY-LEVELS; FLUORINATED QUINOXALINE; RATIONAL DESIGN; THIOPHENE; BENZOTHIADIAZOLE;

D O I：

10.1016/j.orgel.2014.08.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A class of low band-gap two-dimensional conjugated polymers of PBDTT-FQ PBDTT-TQ PBDTT-BTQ and PBDTT-TTQ was designed and synthesized, which contains the same di(alkylthiophene)-substituted benzo[1,2-b:4,5-b']dithiophene (BDTT) and 6,7-difluoro-quinoxaline (Q) units, as well as various conjugated spacers of furan, thiophene, bithiophene and thieno[3,2-b]thiophene in the main chain. Significant effect of the varied spacers between the BDTT and Q units on the thermal, optical, electrochemical and photovoltaic properties was investigated and observed for these two-dimensional copolymers in the polymer solar cells. The maximum power conversion efficiency of 5.9% with a short circuit current of 13.7 mA/cm(2) and a fill factor of 0.56 was obtained for the PBDTT-TQ with thiophene spacer in the bulk hetero-junction PSCs using [6,6]-phenyl-C-71-butyric acid methyl ester as acceptor. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：2876 / 2884

页数：9

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