通过DFT计算分析了InGeX3 (X = Br) 矿的结构,光电子和热电性能
Danish Abdullah1, Dinesh C Gupta2
1Condensed Matter Theory Group, School of Studies in Physics, Jiwaji University, Gwalior, 474011, India. danishmir1650@gmail.com.
Scientific reports
|October 9, 2024
概括
密度函数理论 (DFT) 研究了InGeX3化合物,揭示了它们的电子,光学和机械性能. 这些材料具有直接的带隙和良好的稳定性,表明在紫外线吸收和热电学方面的潜在应用.
科学领域:
- 计算材料科学科学 计算材料科学
- 凝聚物质物理学 凝聚物质物理学
- 固态化学 固态化学
背景情况:
- 材料的电子和光学性能对于其技术应用至关重要.
- 了解新型化合物的稳定性和机械行为对于材料设计至关重要.
- 三化物 (InGeX3) 是一种具有潜力但未被充分探索的性质的材料.
研究的目的:
- 使用计算方法研究InGeX3 (X = Cl, Br) 的电子,光学,机械和热力学特性.
- 确定这些化合物的带隙,稳定性,弹性和介电性质.
- 探索热力学参数和紫外线吸收特征的温度和压力依赖.
主要方法:
- 密度函数理论 (DFT) 使用GGA+跨布拉哈修改的贝克-约翰逊 (TB-mBJ) 方法.
- 形成能量和弹性常数的计算,用于机械稳定性评估.
- 准波德拜模型用于热力学属性的应用.
- 使用Boltztrap2代码进行热电特性计算.
主要成果:
- 确定了1.52 eV (InGeCl3) 和0.98 eV (InGeBr3) 的精确带隙,表明了直接带隙.
- 材料具有有利的形成能量 (Cl为-2.83 eV,Br为-2.35 eV) 和机械稳定性.
- 发现静电介电常数为4.01 (InGeCl3) 和5.74 (InGeBr3).
- 观察到高紫外光谱的显著吸收和有前途的热电特性.
结论:
- InGeCl3和InGeBr3具有直接带隙,并且在机械和热力学上稳定.
- 它们的电子,光学和热电性质表明它们在光电子和能量转换方面的潜在应用.
- 该研究提供了对这些材料的全面理论理解,指导未来的实验研究.
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