有机太阳能电池
材料科学
光异构化
分子
电子受体
接受者
光伏
光伏系统
纳米技术
光化学
化学
聚合物
有机化学
催化作用
异构化
物理
复合材料
生物
凝聚态物理
生态学
作者
Zhi-Xi Liu,Zhipeng Yu,Ziqiu Shen,Chengliang He,Tsz‐Ki Lau,Zeng Chen,Haiming Zhu,Xinhui Lu,Zengqi Xie,Hongzheng Chen,Chang‐Zhi Li
标识
DOI:10.1038/s41467-021-23389-1
摘要
Abstract Photo-degradation of organic semiconductors remains as an obstacle preventing their durable practice in optoelectronics. Herein, we disclose that volume-conserving photoisomerization of a unique series of acceptor-donor-acceptor (A-D-A) non-fullerene acceptors (NFAs) acts as a surrogate towards their subsequent photochemical reaction. Among A-D-A NFAs with fused, semi-fused and non-fused backbones, fully non-fused PTIC, representing one of rare existing samples, exhibits not only excellent photochemical tolerance in aerobic condition, but also efficient performance in solar cells. Along with a series of in-depth investigations, we identify that the structural confinement to inhibit photoisomerization of these unique A-D-A NFAs from molecular level to macroscopic condensed solid helps enhancing the photochemical stabilities of molecules, as well as the corresponding OSCs. Although other reasons associating with the photostabilities of molecules and devices should not excluded, we believe this work provides helpful structure-property information toward new design of stable and efficient photovoltaic molecules and solar cells.
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