文献类型：期刊文献

英文题名：The effect of thieno[3,2-b]thiophene on the absorption, charge mobility and photovoltaic performance of diketopyrrolopyrrole-based low bandgap conjugated polymers

作者：Li, Yongxi[1,2];Chang, Chih-Yu[2];Chen, Yu[1];Song, Yi[1];Li, Chang-Zhi[2];Yip, Hin-Lap[2];Jen, Alex K. -Y.[2];Li, Chao[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

年份：2013

卷号：1

期号：45

起止页码：7526

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20134616965972);WOS:【SCI-EXPANDED(收录号:WOS:000326648100009)】；

基金：The authors are grateful for the financial support of the Fundamental Research Funds for the Central Universities and the Shanghai Leading Talents program.

语种：英文

外文关键词：Hole mobility - Conjugated polymers - Chains - Photovoltaic effects - Energy gap

摘要：A series of two-dimensional diketopyrrolopyrrole-based low band gap conjugated polymers were synthesized. Replacing thiophene with thieno[3,2-b]thiophene in the side chain and bridge 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. The polymer with thieno [3,2-b]thiophene as a bridge instead of a side chain exhibited an increased absorption coefficient and hole mobility, and resulted in the highest power conversion efficiency (5.34%) in this series of polymers. This finding provides valuable insight for the development of more efficient low band-gap polymers.