A conjugated polymer based on 5,5′-bibenzo[c][1,2,5]thiadiazole for high-performance solar cells

被引：21

作者：

Wang, Haifeng ^{[1
,2
,3
]}

Cheng, Pei ^{[1
,2
,3
]}

Liu, Yao ^{[1
,2
,3
]}

Chen, Jianming ^{[1
,2
,3
]}

Zhan, Xiaowei ^{[1
,2
]}

Hu, Wenping ^{[1
,2
]}

Shuai, Zhigang ^{[1
,2
]}

Li, Yongfang ^{[1
,2
]}

Zhu, Daoben ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 08期

基金：

中国国家自然科学基金;

关键词：

PHOTOVOLTAIC CELLS; POLY(2,7-CARBAZOLE); BENZOTHIADIAZOLE; COPOLYMERS; EFFICIENCY; DERIVATIVES; ABSORPTION; TRANSPORT; NETWORK; DESIGN;

D O I：

10.1039/c2jm14283j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Based on a new n-type building block 5,5'-bibenzo[c][1,2,5]thiadiazole (BBT), we designed and synthesized a carbazole-BBT D-A copolymer (P1), and compared it with its carbazole-benzo[c][1,2,5]thiadiazole (BT) analog P2. P1 has good solubility in common organic solvents, while P2 has poor solubility. In films, P1 and P2 exhibit absorption maxima at 565 and 614 nm, respectively. The HOMO level of P1 is -5.51 eV, 0.18 eV lower than that of P2, while the LUMO level of P1 is -3.56 eV, slightly lower than that of P2. The low-lying energy levels and blue-shifted absorption of P1 are attributed to the stronger electron-withdrawing ability of BBT and the twisted main chain of P1. The field-effect hole mobility of P1 is 2 x 10(-3) cm(2) V-1 s(-1). Polymer solar cells based on P1:PC71BM (1 : 3, w/w) exhibit a power conversion efficiency up to 3.7% with a high open circuit voltage of 0.98 V under an AM 1.5 simulated solar light at 100 mW cm(-2).

引用

页码：3432 / 3439

页数：8

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