抗矿衍生物X3AsCl3 (X = Mg,Ca,Sr,Ba) 的压力依赖光电子特性:一个第一原则研究
Tao Hu1, Changhe Wu1, Mingjun Li1
1School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China. lidf@cqupt.edu.cn.
Physical chemistry chemical physics : PCCP
|February 5, 2025
概括
亚化 (Ba3AsCl3) 的抗矿衍生物显示出对光电子产品的希望. 在压力下,Ba3AsCl3表现出增强的光伏性能,达到超过30%的理论转换效率.
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:
- 化佩洛夫斯基特在光电子学中取得了很大的成功.
- 目前正在探索矿类化合物,包括抗矿和衍生物.
- 抗矿衍生物正在成为潜在的光伏吸收器.
研究的目的:
- 研究X3AsCl3 (X = Mg,Ca,Sr,Ba) 反矿衍生物的结构和光电子特性.
- 分析水静压对这些属性的影响.
- 确定光电子应用的有前途的候选人.
主要方法:
- 使用了第一原则计算.
- 研究了结构性和光电子性质.
- 模拟了从0到4 GPa的水静压.
主要成果:
- X3AsCl3化合物的特性显示出对压力的线性依赖.
- Ba3AsCl3表现出对压力的高度敏感性.
- 在4 GPa时,Ba3AsCl3显示带隙减少0.37 eV,格子常数减少0.251 Å.
- 在中等压力下,Ba3AsCl3的理论转换效率超过了30%.
结论:
- Ba3AsCl3是光电子设备的一个有希望的候选.
- 压力诱导的变化增强了Ba3AsCl3的光伏潜力.
- 压缩表轴应变可以进一步优化Ba3AsCl3的性能.
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