材料科学
双功能
二苯甲酮
富勒烯
能量转换效率
接受者
活动层
堆积
热稳定性
化学工程
光引发剂
聚合物太阳能电池
有机太阳能电池
纳米技术
聚合物
光电子学
有机化学
高分子化学
图层(电子)
复合材料
催化作用
单体
化学
工程类
物理
薄膜晶体管
凝聚态物理
作者
Ping Fan,Wenjian Sun,Xiaohua Zhang,Yao Wu,Qin Hu,Qing Zhang,Junsheng Yu,Thomas P. Russell
标识
DOI:10.1002/adfm.202008699
摘要
Abstract Simultaneously improving efficiency and stability is critical for the commercial application of non‐fullerene acceptor polymer solar cells (NFA‐PSCs). Multifunctional solid additives have been considered as a potential route to tune the morphology of the active layer and optimize performance. In this work, photoinitiator bifunctional bis‐benzophenone (BP‐BP) is used as a solid additive, replacing solvent additives, in the PBDB‐T:ITIC NFA system. With the addition of BP‐BP, the intermolecular π–π stacking of PBDB‐T and morphology is improved, leading to more balanced carrier transport and more effective exciton dissociation. Devices fabricated with BP‐BP show a power conversion efficiency (PCE) of 11.89%, with enhanced short‐circuit current ( J sc ), and fill factor (FF). Devices optimized with BP‐BP show excellent reproducibility, insensitivity to thickness, and an improved thermal stability under atmospheric conditions without encapsulation. This work provides a new strategy for the application of solid additives in NFA‐PSCs.
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