在二维JanusMSO (M = Ga,In) 中刺激和环境查效应
Zhi-Jun Yi1, Ran Ji1,2
1School of Materials Science and Physics, China University of Mining and Technology, 221116 Xuzhou, P. R. China.
Inorganic chemistry
|July 30, 2024
概括
简斯单层硫氧化物 (GaSO) 和硫氧化物 (InSO) 系统显示可见光吸收带间隙有前途. 它们的激子结合能可以调整为先进的光伏设备设计.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算化学的计算化学
背景情况:
- 简斯单层是一种具有独特性质的二维材料.
- 硫化 (GaS) 和硫化 (InS) 是具有在电子领域潜在应用的原型材料.
- 了解改造的2D材料的电子和光学特性对于技术进步至关重要.
研究的目的:
- 为了研究Janus单层MSO (M = Ga,In) 系统的电子和光学特性.
- 为了确定氧气替代和化学吸收对带间隙和载体流动性的影响.
- 探索激子结合能量的可调性,用于光伏应用.
主要方法:
- 密度函数理论 (DFT) 用于基态计算.
- 使用GW方法的多体扰动理论.
- 贝特-萨尔佩特方程 (BSE) 用于刺激子的特性.
主要成果:
- 用O和O取代S,化学吸收缩小带间隙,减少JanusMSO中的载体流动性.
- 在GaSO-2和InSO-1系统中,可见光吸收的频段间隙是最佳的.
- 在Janus GaSO-2和InSO-1中,激励子的结合能量低于它们的原型,并且可以通过厚度调整.
结论:
- 简斯单层GaSO和InSO系统具有有利的电子和光学性能,适用于光伏.
- 激子结合能量的可调性为设计高效太阳能电池提供了一条途径.
- 这项研究为Janus 2D材料的光电子行为提供了基本的见解.
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