Side-Chain Effect on Cyclopentadithiophene/Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells

被引：98

作者：

Li, Yongxi ^{[1
,2
]}

Zou, Jingyu ^{[1
]}

Yip, Hin-Lap ^{[1
]}

Li, Chang-Zhi ^{[1
]}

Zhang, Yong ^{[1
]}

Chueh, Chu-Chen ^{[1
]}

Intemann, Jeremy ^{[1
]}

Xu, Yunxiang ^{[1
]}

Liang, Po-Wei ^{[1
]}

Chen, Yu ^{[2
]}

Jen, Alex K. -Y. ^{[1
]}

机构：

[1] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[2] E China Univ Sci & Technol, Key Lab Adv Mat, Inst Appl Chem, Shanghai 200237, Peoples R China

来源：

MACROMOLECULES | 2013年 / 46卷 / 14期

基金：

美国国家科学基金会;

关键词：

OPEN-CIRCUIT VOLTAGE; CONJUGATED POLYMERS; PHOTOVOLTAIC PROPERTIES; RATIONAL DESIGN; PERFORMANCE; COPOLYMERS; BLENDS; TRANSISTORS;

D O I：

10.1021/ma4009302

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized. By replacing the shorter 2-ethylhexyl (EH) side-chain with the longer 3,7-dimethyloctyl (DMO) side-chain, it resulted in significant changes to the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of devices made from these materials. Solar cells fabricated from polymer with 2-ethylhexyl (EH) side-chain and monofluoro substituent exhibits increased open circuit voltage, short circuit current and fill factor, resulting in the highest power conversion efficiency (5.5%) in this series of polymers. This finding provides valuable insight for making more efficient low band gap polymers.

引用

页码：5497 / 5503

页数：7

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