结晶度
结晶
材料科学
聚合物结晶
退火(玻璃)
聚合物
化学工程
接受者
复合材料
物理
工程类
凝聚态物理
作者
Jiangang Liu,Yukai Yin,Kang Wang,Puxin Wei,Haodong Lu,Chun‐Peng Song,Qiuju Liang,Wei Huang
出处
期刊:iScience
[Elsevier]
日期:2022-04-01
卷期号:25 (4): 104090-104090
被引量:29
标识
DOI:10.1016/j.isci.2022.104090
摘要
In all polymer solar cells (all-PSCs), the domain size is critical for device performance. In highly crystalline polymer blends, however, precisely adjusting the domain size remains a significant challenge because of the simultaneous crystallization of both components. Herein, a strategy that promotes acceptor and donor to crystallize separately was proposed. Take PBDB-T/N2200 blends for instance; the solution state and confined crystallization were combined, which induced the crystallization of N2200, and PBDB-T occurred during the film-forming process and at thermal annealing stage. This separated crystallization process lowers the driving force of phase separation without affecting the degree of crystallinity of the blends. Thus, an interpenetrating network with high crystallinity and proper domain size was obtained, which boosted the power conversion efficiency to 7.59%. Importantly, the relation between pre-aggregation and domain size was established, which may be a guide to precisely adjust the active layer's domain size in all-PSCs.
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