材料科学
接受者
有机太阳能电池
溶剂
活动层
分子间力
化学工程
溶解度
光活性层
聚合物太阳能电池
相(物质)
光伏系统
卤素
纳米技术
有机化学
分子
图层(电子)
烷基
复合材料
聚合物
化学
生态学
薄膜晶体管
凝聚态物理
工程类
物理
生物
作者
Muhammad Haris,Zakir Ullah,Seungjin Lee,Du Hyeon Ryu,Seung Un Ryu,Bong Joo Kang,Nam Joong Jeon,Bumjoon J. Kim,Taiho Park,Won Suk Shin,Chang Eun Song
标识
DOI:10.1002/aenm.202401597
摘要
Abstract Developing non‐halogenated solvent‐processed organic solar cells (OSCs) demands precise control over the bulk‐heterojunction (BHJ) morphology of the photoactive layer. However, the limited solubility of halogen‐free solvents to photoactive materials hinders microstructure morphology fine‐tuning for boosting photovoltaic performance. This study not only examines the debated intermolecular interactions between the DBrDIB solid additive and photoactive materials but also analyzes the substantial influence of volatile solid additive on the BHJ morphological properties. The DBrDIB effectively restricts the excessive aggregation of Y6‐BO and regulates the phase separation, which is attributed to strong intermolecular interactions with Y6‐BO and rapid quenching during morphology formation. It then achieves a well‐mixed D/A phase with favorable domain size, resulting in a balanced aggregation and dispersion of D/A, ultimately leading to markedly enhanced charge transfer and transport as well as suppressed charge recombination. The transformative use of the o ‐xylene/DBrDIB solvent system propels PM6:Y6‐BO and PM6:Y6‐HU OSCs to impressive efficiencies of 17.9% and 19.1%, respectively, outperforming those of the control devices. These findings provide crucial insights into theoretical and experimental areas, offering actionable guidelines for designing high‐performance OSCs processed from halogen‐free solvent.
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