合金金属元素对β-Ga2O3的价值带的影响:一项第一原则研究
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Updated: Jun 3, 2025

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Atom Probe Tomography Studies on the CuIn,GaSe2 Grain Boundaries
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Xian-Hu Zha1, Shuang Li2, Yu-Xi Wan1
1Group of the Fourth-generation Semiconductor Materials and Devices, Shenzhen Pinghu Laboratory, Shenzhen 518111, China.
The journal of physical chemistry letters
|January 8, 2025
概括
将β-氧化物与特定金属合金显著增强其价值带最大值,使p型兴奋剂更容易用于先进的电子设备. 这项研究探讨了49种金属合金,以改善半导体性能.
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
- 计算材料科学科学 计算材料科学
背景情况:
- β-氧化物 (β-Ga2O3) 是一个有前途的超宽带隙半导体,用于高功率电子产品.
- 在β-Ga2O3中实现p型导电性是具有挑战性的,因为它具有不利的价值带最大 (VBM) 特性.
- 已经提出金属合金来修改VBM并促进p型兴奋剂.
研究的目的:
- 研究与49种不同的金属 (M) 合金对β-Ga2O3的电子结构的影响.
- 了解金属选择如何影响β-{M}{0.125}{Ga}{0.875}{M}{2}{O}{3}}合金中的VBM和波段分散.
- 为了识别具有改善p型导电性能的合金.
主要方法:
- 使用第一原理计算模拟了49个M合金β-Ga2O3系统 (β-(M0.125Ga0.875) 2O3).
- 对合金配置和电子结构的分析,重点是VBM能量和带分散.
- 计算特定合金的孔有效质量.
主要成果:
- 合金属性在很大程度上取决于合金金属 (M) 的组号.
- 由于M-O轨道杂交,对具有Rh,Ir,Sb和Bi的合金观察到显著的VBM能量增强 (>1 eV).
- 在VBM实现了更的带分散,特别是在13和15组的M,导致孔有效质量减少 (例如,β-{Al}0.125Ga0.875) 2O3中的3.43%).
结论:
- 金属合金有效地改变β-Ga2O3的价值带结构,增强VBM能量并减少孔有效质量.
- 含有特定金属 (Rh, Ir, Sb, Bi, Al) 的合金具有很大的潜力,可以更容易地实现p类型的兴奋剂.
- 这些发现扩大了基于β-Ga2O3的材料在先进的半导体设备中的潜在应用.
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