Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 15, 2025

Abstract Modulating the fibril size of non‐fullerene acceptors has emerged as a promising approach to improve exciton dissociation and charge transport in organic solar cells. While processing solvent additives can promote acceptor aggregation, achieving controlled fibrilization remains challenging due complex donor–acceptor interactions bulk heterojunctions. Herein, solubility‐driven strategy is proposed evaluate their impact on photovoltaic performance bilayer cells, circumventing complexities mixtures. By tuning mass ratio, solubility dichloromethane modulated, leading fiber formation at different length scales during film deposition. Specifically, incorporating BTP‐eC9 into L8‐BO results larger sizes with increasing content, enhancing molecular packing thin‐film crystallinity. These structural improvements boost electron mobility extraction efficiency, yielding power conversion efficiency approaching 20% devices PM6. This effective across various combinations. findings underscore critical role fine‐tuning morphology, offering pathway for advancing solution‐processed

Язык: Английский