Fluorine substituted benzothiazole-based low bandgap polymers for photovoltaic applications

被引：21

作者：

Xiao, Lu ^{[1
]}

Liu, Bo ^{[1
,2
]}

Chen, Xuewen ^{[1
]}

Li, Yongfang ^{[3
]}

Tang, Wanjun ^{[1
]}

Zou, Yingping ^{[1
,4
]}

机构：

[1] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[2] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[4] Cent South Univ, Inst Super Microstruct & Ultrafast Proc, Changsha 410083, Hunan, Peoples R China

来源：

RSC ADVANCES | 2013年 / 3卷 / 29期

关键词：

HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; SIDE-CHAINS; PERFORMANCE; COPOLYMER; EFFICIENCY;

D O I：

10.1039/c3ra41140k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two new D-A alternating copolymers, PBDFFBT and PBDTFBT, featuring a fluorinated benzothiazole (BT) electron-acceptor unit and the electron-donor segments of benzo[1,2-b:4,5-b'] difuran (BDF) or benzo[1,2-b:4,5-b']dithiophene (BDT), were prepared by a standard Stille cross-coupling reaction. The resulting copolymers were characterized by TGA, GPC, UV-vis absorption spectroscopy and cyclic voltammetry measurements. PBDFFBT and PBDTFBT show good film forming properties. Bulk heterojunction polymer photovoltaic devices based on an active layer of the electron donor copolymers (PBDFFBT and PBDTFBT), blended with an electron acceptor [6,6]-phenyl-C-71 butyric acid methyl ester (PC71BM) in three weight ratios of 1 : 1, 1 : 2 and 1 : 3 were investigated. The devices with the configuration of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al demonstrated promising power conversion efficiencies of 3.3% for PBDFFBT:PC71BM (1 : 3, w/w) and 4.0% for PBDTFBT:PC71BM (1 : 2, w/w) under the illumination of AM 1.5, 100 mW cm(-2).

引用

页码：11869 / 11876

页数：8

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