使用直接MoO2前体的MoS2的CVD合成:研究生长温度对前体扩散和形态演变的影响
Ratchanok Somphonsane1,2, Tinna Chiawchan1, Waraporn Bootsa-Ard1
1Department of Physics, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand.
Materials (Basel, Switzerland)
|July 14, 2023
概括
增长温度极大地影响了二硫化 (MoS) 合成. 温度在760°C左右的最佳条件产生连续膜,而较高的温度导致因前体扩散而导致中间状态.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 纳米技术 纳米技术
背景情况:
- 二硫化物 (MoS) 是一种重要的二维材料,在半导体中具有应用.
- 控制合成参数对于实现所需的MoS2属性至关重要.
- 增长温度显著影响合成的MoS的形态和纯度.
研究的目的:
- 为了研究生长温度对MoS2合成的影响,使用MoO2前体.
- 为了确定连续,高质量的MoS2片的最佳生长条件.
- 了解前体扩散在不同温度下MoS2形成中的作用.
主要方法:
- 使用二氧化 (MoO) 前体直接合成MoS.
- 生长温度从650°C以下到800°C以上的系统变化.
- 使用扩散方程和与实验结果的相关性分析前体扩散.
- 研究前体量对MoS2域形成的影响.
主要成果:
- 在650°C以下没有观察到MoS2核化或生长.
- 在约760°C达到最佳的连续MoS薄膜生长.
- 温度超过800°C,导致由于前体扩散的增强和S:Mo比率的降低,导致过渡到中间状态.
- 增加的MoO2前体量导致多层的MoS2域.
结论:
- 增长温度是控制MoS2形态和纯度的关键因素.
- 精确的温度控制是必要的,以避免中间阶段的形成,并实现清洁的MoS薄膜.
- 这些发现为半导体应用的大面积MoS2合成提供了基本的标准.
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