通过第一原理建模,评估基矿在光电子和热电应用中的可行性
Lemya Amrani1,2, Djillali Bensaid3,4, Yahia Azzaz5
1Faculty of Science and Technology, University Ain Temouchent, Belhadj Bouchaib, BP 284, 46000, Ain Temouchent, Algeria.
Journal of molecular modeling
|June 28, 2024
概括
这项研究探讨了六种化物矿在太阳能电池和热电设备中的潜在用途. 这些材料显示出有前途的光学和热电特性,包括可调节的带隙和良好的光吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 计算化学计算化学
背景情况:
- 调查了六种ABH3型化物矿:CsCaH3,CsSrH3,KMgH3,LiBaH3,NaBeH3和RbCaH3.3. 这六种矿是ABH3型化物矿.
- 专注于结构稳定性,电子带结构,光学性能和热电性能.
研究的目的:
- 评估这些化物矿对光伏和热电应用的适用性.
- 提供对它们的物理特性,包括稳定性,电子,光学和热电性能的全面分析.
主要方法:
- 运用密度函数理论 (DFT) 使用FP-LAPW+lo方法使用Wien2k.
- 使用Perdew-Burke-Ernzerhof (PBE),修改的Becke-Johnson (mBJ) 和HSE06函数来进行交换相关.
- 使用BoltzTraP软件提取了热电参数.
主要成果:
- 通过形成的和声子分散来确定结构稳定性.
- 识别的半导体特征与直接带隙 (除了NaBeH3和KMgH3) 从1.91 eV (NaBeH3) 到4.56 eV (RbCaH3) 的范围.
- 分析了光学性能 (介电函数,吸收,折射率) 和热电性能 (Seebeck系数,优点图).
结论:
- 由于吸收紫外线可见光,化矿对光伏应用具有有前途的光学性能.
- 在热电设备方面表现出潜力,具有显著的Seebeck系数和优点数字.
- 这些材料为下一代能源技术提供了有前途的途径.
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