高缺陷耐受性β-CsSnI矿发光二极管
Haixuan Yu1, Tao Zhang1, Zhiguo Zhang1
1Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, Hubei, P. R. China. xiongjieli@hust.edu.cn.
Materials horizons
|July 15, 2024
概括
这项研究使用β-锡化 (β-CsSnI3) 来增强近红外矿LED,以提高效率. 甲稳定材料,减少缺陷,提高光电子应用的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 光电学是指光电子产品.
背景情况:
- 全无无机无CsSnI3在近红外矿发光二极管 (Pero-LED) 中表现有前途.
- 缺陷诱导的非辐射重组目前限制了基于CsSnI3的Pero-LED的光电子特性和应用.
研究的目的:
- 为了提高排放效率,研究不同CsSnI3相的缺陷耐受性.
- 开发一种用于沉积和稳定高晶度β-CsSnI3膜的方法,以提高Pero-LED的性能.
主要方法:
- 对β-CsSnI3和γ-CsSnI3缺陷耐受性的比较分析.
- 使用酸盐沉积和稳定β-CsSnI3膜.
- 光发光量子收益率 (PLQY) 和设备性能的表征.
主要成果:
- β-CsSnI3 显示出比 γ-CsSnI3.3 更高的缺陷耐受性.
- 酸盐的添加抑制了电子-声子散射和非辐射重组,达到高达10%的PLQY.
- 基于β-CsSnI3发射器的近红外LED实现了1.81%的峰值外部量子效率,具有出色的稳定性.
结论:
- 使用β-CsSnI3和酸盐是一种可行的策略,可以提高无矿近红外LED的效率和稳定性.
- 这项工作为先进的光电子设备铺平了道路,提高了性能,减少了对基材料的依赖.
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