期刊
ACS ENERGY LETTERS
卷 5, 期 2, 页码 367-375出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b02842
关键词
-
类别
资金
- National Natural Science Foundation of China [21805097, 21671071, 51521002]
- Guangdong Natural Science Foundation [2016A030310428]
- Guangdong Applied Science and Technology Planning Project [2015B010135009, 2017B090917002]
- Guangzhou Science and Technology Foundation [201904010361]
Solution-processed nonfullerene bulk-heterojunction (BHJ) polymer solar cells (PSCs), which are composed of polymer donors and organic acceptors, are proven to manifest promising performance and long-term stability. In this concise contribution, bithieno[3,4-c]pyrrole-4,6-dione (BiTPD), which is a TPD derivative but presents a large planar structure and strong electron-withdrawing ability, was used to construct a large-bandgap polymer donor PBiTPD. Results show that the polymer donor PBiTPD realized power conversion efficiency (PCE) as high as 14.2% in fullerene-free BHJ solar cells. Larger ionization potential value, more favorable face-on backbone orientation, and stronger crystallinity were concurrently obtained in PBiTPD. Correspondingly, improved and more balanced charge transportation; less nongeminate and trap-assisted recombination losses; and thus high fill factor (FF) of 67%, short-circuit current density (J(SC)) of 25.6 mA.cm(-2), and high open-circuit voltage (V-OC) of 0.83 V were concurrently achieved in PBiTPD-based devices. PBiTPD does clear the way for a novel and promising class of large-bandgap polymer donor candidates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据