15.4% Efficiency all-polymer solar cells

被引：0
作者：
Long Zhang
Tao Jia
Langheng Pan
Baoqi Wu
Zaiyu Wang
Ke Gao
Feng Liu
Chunhui Duan
Fei Huang
Yong Cao
机构：
[1] South China University of Technology,Institute of Polymer Optoelectronic Materials & Devices, State Key Laboratory of Luminescent Materials and Devices
[2] The Hong Kong University of Science and Technology,Department of Chemistry
[3] University of Washington,Department of Materials Science and Engineering
[4] Shanghai Jiao Tong University,Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering
[5] Dalian University of Technology,State Key Laboratory of Fine Chemicals
来源：
Science China Chemistry | 2021年 / 64卷
关键词：
all-polymer solar cells; molecular weight; morphology; device performance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We report all-polymer solar cells (All-PSCs) with record-high power conversion efficiency (PCE) through tuning the molecular weights of the polymer donor (PBDB-T) to form optimal active layer morphology. By combining the polymer donors with a newly reported polymer acceptor (PJ1), an unprecedented high PCE of 15.4% and fill factor over 75% were achieved for the All-PSCs with the medium molecular weight polymer donor (PBDB-TMW), which is the highest value for All-PSCs reported so far. Detailed morphology investigation revealed that the proper phase separation in the PBDB-TMW:PJ1 blend should account for the superior device performance as PBDB-TMW exhibits appropriate miscibility with the polymer acceptor PJ1. These results demonstrated that the device performance of All-PSCs could be fully comparable to that of small molecular acceptor-based PSCs. The formation of optimized morphology via precise control of molecular weights of polymer donors and acceptors is crucial to achieve this goal. [graphic not available: see fulltext]
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页码：408 / 412
页数：4
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