制作
材料科学
有机太阳能电池
纳米技术
分子
有机分子
化学
复合材料
聚合物
有机化学
医学
替代医学
病理
作者
Zhihao Chen,Shaoqing Zhang,Tao Zhang,Jianhua Dai,Yue Yu,Huixue Li,Hao Xin,Jianhui Hou
出处
期刊:Joule
[Elsevier]
日期:2024-04-01
标识
DOI:10.1016/j.joule.2024.03.013
摘要
Summary
The commercialization of organic solar cells (OSCs) encompasses overcoming hurdles related to efficiency, stability, cost, and complexity of device fabrication techniques. The elaborate sequential deposition (SD) process for fabricating charge-transport and photoactive layers stands out as a critical challenge. In this study, we synthesized a series of self-assembling hole-transport molecules, namely, BPC-M, BPC-Ph, and BPC-F, to investigate the mechanism within self-assembling deposition (SAD). The synthesized molecules in SAD-processed cells exhibit significantly varied photovoltaic performance. Notably, BPC-M achieves a superior power conversion efficiency of 19.3% in SAD-processed PBDB-TF:eC9 cells. However, cells incorporating BPC-F show significant performance degradation. It is demonstrated that the thermodynamic forces driven by surface free energy, coupled with intermolecular interactions, are pivotal in dictating the self-assembly efficiency. This determines the quality of the self-assembled layer and the residual molecule in the active layer. This study simplifies OSC fabrication and offers a promising approach for the industrialization of OSCs.
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