结构,电子,光学,弹性,热力学和热传输属性Cs2AgInCl6和Cs2AgSbCl6双矿半导体使用第一原则研究研究
Keqing Zhang1, Lijun Zhang1, S K S Saravana Karthikeyan2
1School of Chemical Engineering, Henan Technical Institute, Zhengzhou, Henan, 450042, P. R. China.
Physical chemistry chemical physics : PCCP
|November 16, 2023
概括
这项研究使用DFT来分析Cs2AgInCl6 (CAIC) 和Cs2AgSbCl6 (CASC) 材料. 两者都有较低的导热率,这表明了先进的照明和显示技术的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 计算物理 计算物理
- 固态化学 固态化学
背景情况:
- Cs2AgInCl6 (CAIC) 和 Cs2AgSbCl6 (CASC) 是双矿材料,在光电子领域具有潜在的应用.
- 了解它们的电子和热特性对于开发新技术至关重要.
研究的目的:
- 调查CAIC和CASC的物理,电,带隙和导热性能.
- 探索这些材料对光和单发射二极管的潜力.
主要方法:
- 第一个原则密度函数理论 (DFT) 使用GGA-PBE方法进行计算.
- 计算带隙能量,德拜温度和导热率.
- 计算的拉曼活性模式与实验数据的比较.
主要成果:
- CAIC的直接带隙为1.812 eV;CASC的间接带隙为0.926 eV.
- 由于低德拜温度 (CAIC为182K,CASC为135K),这两种材料都显示出显著降低的导热率 (CAIC为0.075Wm-1K-1,CASC为300K为0.25Wm-1K-1),这主要是由于低德拜温度 (CAIC为182K,CASC为135K).
- 计算的拉曼模式与实验数据有很好的一致性.
结论:
- 研究的CAIC和CASC的特性使它们成为先进照明和显示应用的有希望的候选者.
- 它们的导热量的量子力学特征要求对单发射器设备进行进一步的研究.
- 这项研究为未来对使用这些材料的和二极管研究提供了基础.
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