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揭示矿在埋藏的接口被动化中的作用
Chittaranjan Das1,2, Rajarshi Roy1, Mayank Kedia1,2
1Institute for Photovoltaics (ipv), University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany.
ACS applied materials & interfaces
|November 22, 2023
概括
矿太阳能电池二氧化 (TiO2) 层中的缺陷被矿前体消极化,改善了电子提取. 这种接口工程通过减少重组来提高太阳能电池的性能.
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.
- 固态物理 固态物理
背景情况:
- 接口对于矿太阳能电池 (PSC) 的性能至关重要.
- 二氧化 (TiO2) 是 n-i-p PSC 中常见的电子选择性层.
- 由于实验挑战,TiO2/矿接口经常被忽视.
研究的目的:
- 在n-i-p PSC中从根本上研究TiO2/矿接口.
- 了解这个关键接口的化学和电子特性.
- 阐明改善电子提取和孔堵塞背后的机制.
主要方法:
- 使用X射线光电子光谱 (XPS) 和X射线吸收光谱 (XAS).
- 采用了可变能量的X射线来探测紧和半孔TiO2/矿结构中的接口.
- 分析了界面上的化学状态和电子带结构.
主要成果:
- 在矿层形成过程中,矿前体溶液会使TiO2的缺陷状态被动化.
- 由于化学相互作用,TiO2/矿界面形成了一层有机层.
- 在接口上观察到Ti3+缺陷的被动化和向上带曲.
结论:
- 通过与矿前体的化学相互作用来消化接口缺陷是关键.
- 有机层的形成和向上带曲增强了电子提取.
- 这些界面修改解释了TiO2在n-i-p PSC中的更好的电子选择性和阻断孔特性.
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