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Cited 28 time in webofscience Cited 41 time in scopus
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Synergistic Engineering of Side Chains and Backbone Regioregularity of Polymer Acceptors for High-Performance All-Polymer Solar Cells with 15.1% Efficiency

Authors
Sun, ChengLee, Jin-WooSeo, SoodeokLee, SeungjinWang, ChengLi, HuanTan, ZhengpingKwon, Soon-KiKim, Bumjoon J.Kim, Yun-Hi
Issue Date
Jan-2022
Publisher
WILEY-V C H VERLAG GMBH
Keywords
all-polymer solar cells; polymer acceptors; polymer crystallinity; polymerized small-molecule acceptors; regioregularity; side chain engineering
Citation
ADVANCED ENERGY MATERIALS, v.12, no.3
Indexed
SCIE
SCOPUS
Journal Title
ADVANCED ENERGY MATERIALS
Volume
12
Number
3
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/1799
DOI
10.1002/aenm.202103239
ISSN
1614-6832
Abstract
Tuning the aggregation and crystalline properties of polymers is critical for realizing all-polymer solar cells (all-PSCs) with optimal blend morphology and high power conversion efficiency (PCE). In this study, a series of polymerized small-molecule acceptors (PSMAs) is developed to investigate important relationships among their crystalline/aggregation properties, the blend morphology, and the device performance of the resulting all-PSCs. A series of PSMAs (regiorandom (RRd)-C12, RRd-C20, RRd-C24, regioregular (RRg)-C20, and RRg-C24) with simultaneously-engineered i) side chain lengths of C12, C20, and C24, and ii) backbone regioregularities of RRd and RRg are synthesized to regulate their crystalline/aggregation properties. As a result, the highest PCE of 15.12% is obtained with all-PSCs based on RRg-C20 PSMA having regioregular backbone and optimal side chain length, attributed to high PSMA crystallinity and electron mobility as well as optimal blend morphology with a polymer donor. Thus, this study demonstrates the importance of simultaneous engineering of the backbone regioregularity and side-chain structures of PSMAs to enhance electron mobility, optimize blend morphology and, thus, achieve highly efficient all-PSCs.
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