巨型黄瑞斯因子,用于矿太阳能电池中间的电子捕获
Lucy D Whalley1, Puck van Gerwen2, Jarvist M Frost3
1Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, NE1 8QH, U.K.
Journal of the American Chemical Society
|June 9, 2021
概括
了解化矿中的电子捕获是提高光电子性能的关键. 这项研究揭示了间隙的快速电子捕获,突出了强大的电子-声子合,并提出了增强缺陷耐受性的方法.
科学领域:
- 材料科学
- 固态物理
- 量子化学
背景情况:
- 化半导体对于光电子非常重要.
- 而非辐射载体的捕获阻碍了它们的性能.
- 间位是已知的深层缺陷和重组中心.
研究的目的:
- 分析间位物捕获载体的量子力学.
- 了解影响化中电子捕获的因素.
主要方法:
- 运载体捕获的量子力学分析
- 黄瑞斯因子的计算
- 确定声子模式频率和电子捕获系数.
- 使用反向参与比率量化语音模式局部化.
主要成果:
- 通过中性间位物确定了快速和不可逆转的电子捕获.
- 一个高的有效黄瑞斯因子 (>300) 表明了强大的电子声波合.
- 接收声模式的频率为53厘米-1.
- 确定电子捕获系数为1×10−10cm3s−1.
结论:
- 在柔软的化半导体中,强大的电子-声子合是显著的.
- 抑制八面旋转被推断为提高这些材料的缺陷耐受性.
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