文献类型：期刊文献

英文题名：Eleven-Membered Fused-Ring Low Band-Gap Polymer with Enhanced Charge Carrier Mobility and Photovoltaic Performance

作者：Li, Yongxi[1,2];Yao, Kai[1];Yip, Hin-Lap[1];Ding, Fei-Zhi[3];Xu, Yun-Xiang[1];Li, Xiaosong[3];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, Inst Appl Chem, Key Lab Adv Mater, Shanghai 200237, Peoples R China;[3]Univ Washington, Dept Chem, Seattle, WA 98195 USA

年份：2014

卷号：24

期号：23

起止页码：3631

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20142517847618);WOS:【SCI-EXPANDED(收录号:WOS:000337484300019)】；

基金：The authors thank the support from the Air Force Office of Scientific Research (FA9550-09-1-0426), the Asian Office of Aerospace R&D (FA2386-11-1-4072), the Office of Naval Research (N00014-11-1-0300). A.K.-Y.J. thanks the Boeing Foundation for support. Y.L. thanks the State-Sponsored Scholarship for Graduate Students from China Scholarship Council.

语种：英文

外文关键词：conjugated polymers; ladder-type polymers; organic photovoltaics; organic field-effect transistors; reorganization energy

摘要：A multi-ring, ladder-type low band-gap polymer (PIDTCPDT-DFBT) is developed to show enhanced light harvesting, charge transport, and photovoltaic performance. It possesses excellent planarity and enhanced effective conjugation length compared to the previously reported fused-ring polymers. In order to understand the effect of extended fused-ring on the electronic and optical properties of this polymer, a partially fused polymer PIDTT-T-DFBT is also synthesized for comparison. The fully rigidified polymer provides lower reorganizational energy, resulting in one order higher hole mobility than the reference polymer. The device made from PIDTCPDT-DFBT also shows a quite promising power conversion efficiency of 6.46%. Its short-circuit current (14.59 mA cm(-2)) is also among the highest reported for ladder-type polymers. These results show that extending conjugation length in fused-ring ladder polymers is an effective way to reduce band-gap and improve charge transport for efficient photovoltaic devices.