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内带激发动力学 n-化银化物量子点的内带激发动力学

Rajesh Bera¹, Miguel Dosil¹, Gerasimos Konstantatos^1,2

¹ICFO, Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860 Spain.

|October 28, 2024

概括

配有N兴奋剂的银化物 (Ag2Se) 体量子点表现出依赖于兴奋剂水平的Auger重组. 这一过程随着费米能量接近1P<0xE2><0x82><0x91>状态而加速,影响红外光电子.

科学领域:

材料科学材料科学材料科学
量子点技术量子点技术是一种量子点技术.
红外光电学和光电学.

背景情况:

银化物 (Ag2Se) 体量子点 (CQD) 正在成为红外光电子的环保材料.
带内转换 (1S<0xE2><0x82><0x91>-1P<0xE2><0x82><0x91>) 是它们功能的关键.
多载体相互作用,特别是Auger重组,显著影响CQD特性和设备性能.

研究的目的:

在n-doped Ag2Se CQD中研究载体动态.
了解兴奋剂对带内兴奋状态动态的影响.
评估Ag2Se CQD在红外光电子设备中的潜力.

主要方法:

使用了femtosecond中红外短暂吸收光谱.
在溶液和薄膜状态下研究了Ag2Se CQD.
分析了载体动力学和奥格尔重组过程.

主要成果:

在Ag2Se CQD中多载体Auger重组是依赖于兴奋剂程度的.
随着费米能量 (E<0xE2><0x82><0x93>) 接近1P<0xE2><0x82><0x91>状态,增强器重组率就会增加.
测量的带内奥格尔系数 (C<0xE2><0x82><0x90>) 约为10−28 cm6 s−1,高于n-doped HgS/Se CQD.

结论:

费米能量水平极大地影响了n-doped Ag2Se CQD中的奥格尔重组.
了解这些动态对于优化光电子应用中的Ag2Se CQD至关重要.
Ag2Se CQD显示出希望,但需要仔细的兴奋剂控制,以确保设备的高效运行.

关键词:

在Auger重组的重组过程中,激发激发的动力学在内带内使用.银色化物银色化物

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