对于非化溶剂加工有机太阳能电池的3D二极体受体的异构效应,效率为20%
Jia Wang1, Peiran Wang1, Tianqi Chen1
1School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China.
Angewandte Chemie (International ed. in English)
|December 26, 2024
概括
使用非化溶剂的有机光伏材料的分子异构化使有效的有机太阳能电池 (OSC) 成为可能. 来自CH8-4的异构体CH8-4A和CH8-4B显示可调节的预聚合,从而改善OSC中的薄膜形态和功率转换效率.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 有机太阳能电池 (OSC) 需要使用非化溶剂进行环保加工,用于大面积制造.
- 具有良好的溶解性和分子包装的有限电子受体阻碍了高效的非化溶剂加工OSC.
研究的目的:
- 通过改变原子位置来合成和研究3D二维受体CH8-4 (CH8-4A和CH8-4B) 的异构体.
- 探索分子异构和分子内相互作用对溶解度,预聚合和膜形态学的影响.
- 为了提高非化溶剂加工的OSC的性能.
主要方法:
- 通过分子异构化合成CH8-4异构体 (CH8-4A,CH8-4B).
- 在oxylene溶液中研究了分子预聚合.
- 使用PM6:CH8-4混合物和三元系统制造和特征有机太阳能电池设备.
- 评估功率转换效率 (PCE) 和迷你模块性能.
主要成果:
- 异构化导致了不同的分子内硫相互作用和预聚合能力 (CH8-4B < CH8-4 < CH8-4A).
- CH8-4表现出中度预聚合,导致PM6:CH8-4器件的最佳相隔和18.1%的PCE.
- 使用L8-BO-D的三元器件实现了20.0%的PCE,迷你模块达到近16%的PCE.
结论:
- 分子异构化是一种可行的策略,用于设计高性能,环保的OSC的3D二维接受器.
- 调整原子的位置可以有效地控制分子包装和膜形态.
- 在非化溶剂加工的OSC和迷你模块中实现了高效率,证明了其实际应用.
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