对β-Ga2O3的原子层沉积的DFT机械见解
Jiamin Yang1, Yuhang Jing1, Zhiqiang Yang1
1Department of Astronautical Science and Mechanics, Harbin Institute of Technology Harbin Heilongjiang 150001 China jingyh@hit.edu.cn.
RSC advances
|October 15, 2025
概括
这项研究使用密度函数理论来理解β-氧化物 (β-Ga2O3) 原子层沉积 (ALD). 我们揭示了表面反应机制和途径,为更好的薄膜生长控制提供了见解.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 计算化学计算化学
背景情况:
- 氧化 (Ga2O3) 是一个宽带差半导体,在先进电子领域具有重大潜力.
- 制造β-Ga2O3薄膜至关重要但具有挑战性,原子层沉积 (ALD) 是一个关键技术.
- 通过ALD的β-Ga2O3的精确生长机制,特别是使用三甲基 (TMG) 和O2,仍然不太清楚.
研究的目的:
- 通过使用TMG和O2前体,研究β-Ga2O3ALD的表面反应机制和详细的途径.
- 阐明对控制ALD过程的关键中间体和能量障碍的原子化见解.
- 为金属氧化物ALD的机理学研究提供一个一般的框架.
主要方法:
- 密度函数理论 (DFT) 的计算被用来建模ALD过程.
- 该研究重点关注两个自我限制的半反应:TMG化学吸收和O2氧化.
- 分析表面反应,中间物种和能量障碍.
主要成果:
- ALD过程涉及TMG甲基组的逐渐解离和转移.
- 稳定的气体产品如甲 (CH) 和乙烯 (C) 在过程中消化.
- 层次增长是通过顺序的TMG化学吸收和O2氧化步骤实现的.
结论:
- 这项研究提供了关于β-Ga2O3 ALD机制的详细原子学理解.
- 这些发现有助于对β-Ga2O3薄膜特性进行更好的控制.
- 建立的框架有助于未来的金属氧化物ALD研究.
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