Side-Chain Engineering of Non-Fullerene Acceptors with Trialkylsilyloxy Groups for Enhanced Photovoltaic Performance
Qingyuan Wang , Qi Chen , Shixin Meng , Li Tian , Haiqiao Wang , Yu Chen , Zitong Liu , Lingwei Xue , Zhi-Guo Zhang
Chinese Journal of Chemistry ›› 2024, Vol. 42 ›› Issue (18) : 2153 -2160.
Side-Chain Engineering of Non-Fullerene Acceptors with Trialkylsilyloxy Groups for Enhanced Photovoltaic Performance
Side-chain engineering has emerged as a highly effective strategy for tailoring the aggregation behavior and charge transport properties of non-fullerene small molecule acceptors (SMAs). In this study, we designed and synthesized two SMAs, namely BTPSi-Bu and BTPSi-Pr, respectively incorporating tributylsilyloxy and triisopropylsilyloxy groups in their outer positions. Notably, BTPSi-Bu exhibited better planarity, crystallization, and favorable phase separation when paired with PM6 donor polymer compared to its counterpart, BTPSi-Pr. The resulting organic solar cells, utilizing the PM6:BTPSi-Bu blend, demonstrated a remarkable power conversion efficiency of 17.41% and a high open-circuit voltage of 0.859 V. These findings underscore the significance of integrating trialkylsilyloxy side chains into SMAs as a rational design approach for enhancing the performance of photovoltaic systems.
Organic solar cells / Non-fullerene acceptors / Oligomers / Side-chain engineering / Energy conversion / Synthesis design / Donor-acceptor systems
2024 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
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