On the Stability of Non‐fullerene Acceptors and Their Corresponding Organic Solar Cells: Influence of Side Chains

• DOI: 10.1002/adfm.202206042
• Publication Date: 2022-08-12T05:36:48Z
• Authors: Bojun Zhou; Liang Wang; Yang Liu; Chuanhang Guo; Donghui Li; Jinlong Cai; Yiwei Fu; Chen Chen; Dan Liu; Yinhua Zhou; Wei Li; Tao Wang
• Keywords: Side chain; Thermal Stability; Ultraviolet; Degradation

Abstract Side chain engineering is a widely explored strategy in the molecular design for non‐fullerene acceptors (NFAs). Although relationship between side structures and optoelectronic properties of NFAs well clarified, effect on stability their corresponding organic solar cells (OSCs) rarely reported. Herein, series Y‐family with varying side‐chains are studied to investigate degradation upon multiple stresses including water, oxygen from ambient, chemical environment ZnO electron transport layer, temperature, ultraviolet light. The results show that all these highly stable against water ambient dark condition, while photochemical thermal stabilities decrease increasing length. shorter chains not only more resistant photo‐oxidation photocatalytic reactions, but also can hamper formation large phase‐separated NFA domains storage both glovebox conditions. As such, PM6:NFA OSC short side‐chain exhibits superior operational stability, associating higher T 80 lifetime. This study demonstrates must be considered obtain OSCs.