用TiO2系统组装的Mn2+兴奋剂CsPbBr3的光生成载体动力学:Mn兴奋剂含量的影响
Luchao Du1, Jie An1, Tetsuro Katayama2
1Institute of Atomic and Molecular Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
The Journal of chemical physics
|April 24, 2024
概括
研究被化化化 (CsPbBr3) 矿太阳能电池揭示了Mn2+兴奋剂影响载体冷却,电荷转移和重组. 最佳的兴奋剂通过修改缺陷状态和带隙来增强光电性能.
科学领域:
- 材料科学 材料科学 材料科学
- 太阳能光伏发电是如何实现的
- 频谱学是一种光谱学.
背景情况:
- 全无机矿材料是薄膜太阳能电池的前景,因为其优越的光物理性能.
- 了解光生成载体的超高速动态对于提高设备性能至关重要.
研究的目的:
- 为了研究CsPbBr3/TiO2复合系统的过渡动态,具有不同的Mn2+兴奋剂度.
- 阐明Mn2+兴奋剂对载体冷却,电荷转移和重组过程的影响.
主要方法:
- 五秒瞬时吸收光谱被用来研究超快的动态.
- 用单值分解和全局拟合来分析光谱数据.
主要成果:
- 确定了三种不同的动态过程:热载体冷却,电荷转移和电荷重组.
- Mn2+兴奋剂度影响所有三个过程,受缺陷状态密度和带隙宽度的影响.
- 电荷转移时间常数最初增加,然后在Mn2+兴奋剂下降,表明最佳度.
结论:
- 适当的Mn2+兴奋剂可以显著提高CsPbBr3/TiO2太阳能电池系统的光电性能.
- 提出了一个电荷传递机制模型来解释Mn2+兴奋剂对界面电荷传递的微观影响.
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