使用自组装单层的增强MoS2场效应晶体管的性能:减轻介电层散射和提高设备性能的一项有希望的战略
Li Cao1,2, Junqing Wei3, Xianggao Li1,2
1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
Molecules (Basel, Switzerland)
|September 14, 2024
概括
自组装单层 (SAM) 通过改进接口特性来增强二维二硫化物场效应晶体管 (2D-MoS2 FET). 这一策略通过减少散射,显著提高了设备的移动性和性能.
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
- 纳米技术 纳米技术
背景情况:
- 二维二硫化物 (2D-MoS2) 场效应晶体管 (FET) 对电子和光电子有望发展.
- 设备性能受到界面散射的限制,从而减少载体的移动性.
- 优化MoS2和介电层之间的接口对于高性能设备至关重要.
研究的目的:
- 通过在MoS2/SiO2接口上插入自组装单层 (SAM) 来制造高性能MoS2-FET.
- 调查不同SAM结构对设备性能的影响.
- 了解潜在的机制,包括声子散射,负责性能提升.
主要方法:
- 在MoS2和SiO2之间插入SAM (PFPA,ABPA,ODPA) 的MoS2-FET的制造.
- 制造FET的电气特性,以测量移动性和开/关比.
- 密度函数理论 (DFT) 和第一原理计算来研究接口特性和声子散射.
主要成果:
- SiO2/ABPA/MoS2-FET表现出显著增强的移动性 (528.7 cm2 V-1 s-1 ,7.5倍的改进) 和106的开/关比.
- SAMs,特别是ABPA,已被证明可以修改接口属性并减少来自SiO介电层的声子散射.
- DFT计算将SAM分子双极向量与设备性能改进相关联.
结论:
- 插入SAM,特别是ABPA,是制造高性能MoS-FET的有效策略.
- 改进的设备性能归因于在优化的MoS2/电解介面上抑制了声子散射.
- 这项工作为通过接口工程推进基于二维材料的电子设备提供了一条途径.
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