在有机太阳能电池中,本地双极调制向高填充因子
Zhihao Chen1, Yang Xiao1,2, Huifeng Yao3
1State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|August 12, 2024
概括
在非富勒受体 (NFAs) 中调节分子不对称性可以提高有机太阳能电池 (OSC) 的性能. 定制局部二极管提高了有机太阳能电池的填充系数 (FF) 和功率转换效率 (PCE).
科学领域:
- 有机电子学有机电子学
- 材料科学 是一种材料科学.
- 太阳能光伏发电是如何实现的
背景情况:
- 有机半导体中的双极时刻排列对于分子间包装和光电子特性至关重要.
- 在有机太阳能电池 (OSC) 中实现高填充系数 (FF) 对设备性能至关重要.
研究的目的:
- 通过改变分子不对称性来调节非富勒烯受体 (NFAs) 的局部二极管.
- 研究双极调制对OSC分子间包装和光电子特性的影响.
主要方法:
- 设计和合成了两种NFAs (AA-1和AA-2),使用不同的基和基替代物.
- 分析了单向与双向不对称对局部双极的影响.
- 评价了膜状态包装,相对介电常数,激电寿命和缺陷状态.
主要成果:
- 在AA-2的单向不对称性产生了明显的局部双极,而AA-1的双向不对称性减轻了双极变化.
- 局部二极子时刻显著影响了终端组包装,增强介电常数,刺激子寿命,减少缺陷状态.
- 基于PBDB-TF:AA-2的OSC实现了0.830的FF和18.3%的功率转换效率 (PCE);三元装置达到19.3%的PCE.
结论:
- 通过分子不对称的双极调制是优化FF在高性能OSC中的可行策略.
- 在NFA中定制局部双极可以显著提高光电子特性和设备性能.
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