活动层
分子
分子间力
材料科学
化学物理
相变
小分子
纳米技术
有机太阳能电池
化学工程
图层(电子)
化学
聚合物
有机化学
热力学
复合材料
工程类
物理
薄膜晶体管
生物化学
作者
Runnan Yu,Rui Shi,Zhixiong He,Tao Zhang,Shuang Li,Qianglong Lv,S. Sha,Chunhe Yang,Jianhui Hou,Zhan’ao Tan
标识
DOI:10.1002/anie.202308367
摘要
Fine-tuning the thermodynamic self-assembly of molecules via volatile solid additives has emerged to be an effective way to construct high-performance organic solar cells. Here, three-dimensional structured solid molecules have been designed and applied to facilitate the formation of organized molecular assembly in the active layer. By means of systematic theory analyses and film-morphology characterizations based on four solid candidates, we preselected the optimal one, 4-fluoro-N,N-diphenylaniline (FPA), which possesses good volatility and strong charge polarization. The three-dimensional solids can induce molecular packing in active layers via strong intermolecular interactions and subsequently provide sufficient space for the self-reassembly of active layers during the thermodynamic transition process. Benefitting from the optimized morphology with improved charge transport and reduced energy disorder in the FPA-processed devices, high efficiencies of over 19 % were achieved. The strategy of three-dimensional additives inducing ordered self-assembly structure represents a practical approach for rational morphology control in highly efficient devices, contributing to deeper insights into the structural design of efficient volatile solid additives.
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