在[MAPbCl3][CsPbBr3]1-的单晶中进行载体重组的动态
Zheng Zou1,2, Zijie Xiao1, Wenxin Dong3
1School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China. wzhang@gzhu.edu.cn.
Physical chemistry chemical physics : PCCP
|February 19, 2025
概括
一种新的异构方法有效地使化 (CsPbBr3) 单晶体中的表面陷无活化. 这种被动化显著降低了载体重组率,提高了半导体性能.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 太阳能光伏发电是如何实现的
背景情况:
- 在CsPbBr3单晶 (SC) 中的表面陷通过促进载体重组来阻碍性能.
- 消极化方法对于提高半导体设备效率至关重要.
研究的目的:
- 开发和评估一种异构结构方法,用于CsPbBr3 SCs中的表面陷被动化.
- 为了将被动化效应与载体重组动态相关联.
主要方法:
- 采用时间分辨率光谱技术:稳态和时间分辨率光发光 (TRPL) 和时间分辨率微波光导 (TRMC).
- 在裸体和[MAPbCl3]0.34[CsPbBr3]0.66-覆盖的CsPbBr3 SC中研究载体重组,有或没有胆化物 (CB) 添加剂.
主要成果:
- 在赤裸的CsPbBr3 SCs的TRPL动力学中,确定了表面孔陷作为主导作用.
- 在异构结构中观察到电荷载体从外转移到CsPbBr3晶体.
- [MAPbCl3]0.34[CsPbBr3]0.66外的电子捕获率和孔捕获率分别降低了2.2倍和5.2倍.
结论:
- [MAPbCl3]0.34[CsPbBr3]0.66的异构结构有效地使CsPbBr3SCs中的表面陷无能化.
- 胆化添加剂可以引入额外的表面陷.
- 开发的被动化策略通过减轻重组损失来提高CsPbBr3晶体的性能.
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