深入LUMO:用于低hysteresis矿太阳能电池的化纳二甲基二胺电子输送层
Sanggyun Kim1, Justine S Wagner2, Sina Sabury2
1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
概括
研究人员开发了新的有机电子传输层,用于矿太阳能电池,通过使用基酸与二胺二甲功能化. 化提高了性能,实现了13.67%的功率转换效率.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 有机电子 有机电子
背景情况:
- 高效的矿太阳能电池 (PSC) 需要在接口处精确的能量水平对齐.
- 有机电子输送层 (ETL) 为PSC提供可调节的电子特性.
研究的目的:
- 设计和合成基于功能化二甲二胺 (NDI) 的新型有机ETL.
- 调查分子结构,特别是化物对PSC中ETL性能的影响.
主要方法:
- 合成两个基酸 (BnPA) 功能化的NDI衍生物:NDI-(BnPA) 2和Br2-NDI-(BnPA) 2.
- 使用这些有机ETL在n-i-p配置中的PSC的制造和表征.
- 分析设备性能指标,包括功率转换效率 (PCE),短路电流密度 (JSC) 和歇斯底里.
主要成果:
- 在 Br2-NDI-(BnPA) 2 中的 NDI 核心的化使其最低的无人分子轨道 (LUMO) 深入 0.29 eV.
- 与NDI-(BnPA) 2 (13.20%) 相比,使用Br2-NDI-(BnPA) 2的PSC显示出改善的JSC和更高的PCE (13.67%).
- 结合Br2-NDI-(BnPA) 2的设备显示出降低的歇斯底里,这归因于更好的能量对齐和抑制的界面电荷积累.
结论:
- 在有机ETL中对LUMO水平的分子级调整对于优化PSC性能至关重要.
- 用BnPA功能化的NDI衍生品,特别是化版本,作为高性能和稳定的PSC的有效ETL.
- 将LUMO调整与接口定策略相结合,可以推进矿光伏的有机ETL.
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