在TaS2/MoS2和TaS2/WSe2异构结构中调整的接触类型和接口电子属性
Xiangjiu Zhu1, Hongxing Jiang1, Yukai Zhang1
1Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Key Laboratory of Preparation and Application of Environmental Friendly Materials, College of Physics, Jilin Normal University, Changchun 130103, China.
Molecules (Basel, Switzerland)
|July 29, 2023
概括
单层1T-TaS2与2H-MoS2和2H-WSe2形成高效的n型和p型肖特基接触. 这些接触可以通过电场和层间距来调整,用于新的光电应用.
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
- 纳米技术纳米技术
背景情况:
- 单层1T-TaS2是一种金属材料,而2H-MoS2和2H-WSe2则是半导体.
- 范德瓦尔斯异构结构 (vdWHs) 在接口上提供可调节的电子特性.
- 了解金属半导体接触对于电子设备设计至关重要.
研究的目的:
- 研究1T-TaS2/2H-MoS2和1T-TaS2/2H-WSe2 vdWHs. 的电子和接口特性.
- 确定Schottky屏障接触形成的类型和特征.
- 探索调整这些联系对潜在应用的方法.
主要方法:
- 用第一原则计算来研究电子结构.
- 进行了接口特征和肖特基屏障高度 (SBHs) 的分析.
- 模拟考虑了层间距和外部电场的影响.
主要成果:
- 1T-TaS2/2H-MoS2与超低的SBH形成了一个n型肖特基接触 (n-ShC).
- 1T-TaS2/2H-WSe2与超低的SBH形成了一个p型肖特基接触 (p-ShC).
- 接触型 (n型到p型) 和行为 (Schottky到Ohmic) 可通过层间间距和电场调节.
结论:
- 1T-TaS2作为2H-MoS2和2H-WSe2的有效金属接触,使得高电荷注入效率.
- 这些VDWH中的可调 Schottky 接触器为设计先进的光电设备提供了新的途径.
- 在Schottky和Ohmic接口之间切换的能力扩大了设计灵活性.
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