Donor-acceptor copolymers based on benzo [1,2-b:4,5-b′] and pyrene-fused phenazine for high-performance polymer solar cells

被引：44

作者：

Fan, Qunping ^{[1
]}

Liu, Yu ^{[1
]}

Xiao, Manjun ^{[1
]}

Tan, Hua ^{[1
]}

Wang, Yafei ^{[1
]}

Su, Wenyan ^{[1
]}

Yu, Delong ^{[1
]}

Yang, Renqiang ^{[2
]}

Zhu, Weiguo ^{[1
]}

机构：

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

[2] 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：

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; Benzo[1,2-b:4,5-b ']dithiophene; Pyrene; Phenazine; Donor-acceptor; POWER-CONVERSION EFFICIENCY; LOW-BANDGAP POLYMER; PHOTOVOLTAIC PROPERTIES; CONJUGATED POLYMERS; QUINOXALINE; DIKETOPYRROLOPYRROLE; SINGLE; DESIGN; UNIT;

D O I：

10.1016/j.orgel.2014.09.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two novel donor-acceptor (D-A)-type conjugated polymers of PTTPPz-BDT and PTTPPz-BDTT were successfully synthesized by Stille coupling polymerization, in which 7,8-dialkoxy benzo[1,2-b:4,5-b']dithiophene (BDT) and 7,8-bithienyl benzo[1,2-b:4,5-b']dithiophene (BDTT) were used as donor units, thiophene and pyrene-fused phenazine (PPz) were employed as pi-bridges and acceptor units, respectively. High carrier mobilities, broad absorption spectra, narrow optical band gaps, and low HOMO energy levels were observed for both polymers. Furthermore, high-efficiency photovoltaic performance with power conversion efficiency (PCE) over 4.25% was exhibited in their polymer solar cells (PSCs) using [6,6]-phenyl-C-71-butyric-acid-methyl-ester (PC71BM) as acceptor. The maximum PCE of 4.86% with short-circuit current density of 11.10 mA cm(-2) and fill factor of 62.5% was obtained in the PTTPPz-BDTT based cell. These results indicate that incorporating large planar PPz moiety into D-A-type copolymer is an efficient approach to improve photovoltaic performance for PSCs. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：3375 / 3383

页数：9

共 40 条

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