Low bandgap copolymer of 1,4-diketopyrrolo[3,4-c]pyrrole and thieno[3,2-b]thiophene: Synthesis and applications in polymer solar cells and field-effect transistors

被引：12

作者：

Min, Jie ^{[1
,2
]}

Peng, Bo ^{[1
]}

Wen, Yugen ^{[1
]}

Zhang, Zhi-Guo ^{[1
]}

Zhang, Maojie ^{[1
]}

Zhang, Jing ^{[1
]}

Xie, Qiang ^{[2
]}

Liu, Yunqi ^{[1
]}

Li, Yongfang ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China

[2] China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China

来源：

SYNTHETIC METALS | 2011年 / 161卷 / 17-18期

关键词：

Low bandgap polymers; 1,4-Diketopyrrolo[3,4-c]pyrrole-based polymers; Polymer solar cells; Organic field effect transistors; SIDE-CHAIN; POLYTHIOPHENE DERIVATIVES; PHOTOVOLTAIC PROPERTIES; SEMICONDUCTORS; PERFORMANCE; GAP;

D O I：

10.1016/j.synthmet.2011.06.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new conjugated polymer, poly(3,6-dihexyl-thieno[3,2-b]thiophenyl-2,5-diyl-alt-2,5-di(2-ethylhexyl)-3,6-bis(thien-2,5-diyl)-pyrrolo[3,4-c]-pyrrole-1,4-dione)(DH-PTTDPP) was synthesized by Pd-catalyzed Stille-coupling method. The thermal, absorption, electrochemical, photovoltaic properties, and field-effect charge transport of the polymer were examined. The polymer is soluble in common organic solvents and possesses a broad absorption band covering from 500 nm to 900 nm with an optical bandgap of 1.33 eV. Field-effect transistors (FETs) based on DH-PTTDPP thin film showed a hole mobility of 2.5 x 10(-3) cm(2) V-1 s(-1) with an on/off ratio of 10(5), which is among the high values for the conjugated polymers. Polymer solar cells (PSCs) based on DH-PTTDPP/PC70BM (1:1.5, w/w) demonstrated a power conversion efficiency of 1.90% under the illumination of AM 1.5, 100 mW cm(-2). These results indicate that DH-PTTDPP is an attractive polymer semiconductor for the applications in FETs and PSCs. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1832 / 1837

页数：6

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