@article{c72b97349c9643168ce9b9f0e98e7dbb,
title = "A Terpolymer Acceptor Enabling All-Polymer Solar Cells with a Broad Donor:Acceptor Composition Tolerance and Enhanced Stability",
abstract = "Achieving a broad donor:acceptor (D:A) composition tolerance in efficient organic solar cells (OSCs) is important for printing large-area solar cell modules. Herein, all-polymer solar cells (all-PSCs) based on new terpolymer acceptors and a well-known polymer donor PTB7-Th are fabricated to explore the effect of D:A ratio on morphology and photovoltaic performances. The all-PSCs show a promising power conversion efficiency (PCE) of 7.23% with an optimum D:A ratio of 1:2 and retain over 40% of its optimal PCE with ultrabroad D:A composition tolerance from 1:30 to 10:1. In addition, the all-PSCs can maintain 90% of its original PCE after 400 h of storage despite such broad range of D:A ratio, which is much better than those of other types of OSCs and even better than the benchmark all-polymer system with N2200 as the acceptor under the same condition. The results show the superiority of the all-PSCs in terms of D:A ratio tolerance and performance stability, which should be conducive to practical applications of all-PSCs.",
keywords = "all-polymer solar cells, film morphology, high donor:acceptor ratio tolerance, n-type terpolymers",
author = "Bin Liu and Junwei Wang and Huiliang Sun and Ziang Wu and Chao Yao and Qiaogan Liao and Zixiang Wei and Wanli Yang and Xianhe Zhang and Hong Meng and Woo, {Han Young} and Xugang Guo",
note = "Funding Information: B.L. and J.W. contributed equally to this work. H.S. thanks the National Natural Science Foundation of China (grant no. 21801124) for the financial support. X.G. is grateful to the Shenzhen Science and Technology Innovation Commission (grant nos. JCYJ20170817105905899 and JCYJ20180504165709042). B.L. thanks China Scholarship Council Fund (grant no. 201906010074). H.M. is grateful to the Shenzhen Science and Technology Innovation Commission (grant no. JCYJ20180302153406868) and Shenzhen Hong Kong Innovation Circle Joint R and D project (grant no. SGLH20161212101631809). H.Y.W. is grateful for the financial support from the National Research Foundation (NRF) of Korea (grant nos. NRF‐2016M1A2A2940911 and 2019R1A6A1A11044070). The authors acknowledge the assistance of Southern University of Science and Technology Core Research Facilities (SUSTech CRF) and thank Dr. Yinhua Yang, Hua Li, and Lin Lin at the Materials Characterization and Preparation Center SUSTech for the high‐temperature H NMR and HRMS testing, respectively. This work was also supported by the Center for Computational Science and Engineering of SUSTech. 13 Publisher Copyright: {\textcopyright} 2020 Wiley-VCH GmbH",
year = "2020",
doi = "10.1002/solr.202000436",
language = "English",
journal = "Solar RRL",
issn = "2367-198X",
publisher = "Wiley-VCH Verlag",
}