单极垂直堆叠单层 ReS2/MoS2异极连接的屏障高度的门调节
Gowtham Polumati1, Chandra Sekhar Reddy Kolli1, Aayush Kumar1
1Department of Electrical and Electronics Engineering, BITS Pilani Hyderabad Campus, Hyderabad, 500078, India.
Scientific reports
|September 13, 2024
概括
这项研究提出了一个垂直堆叠的ReS2/MoS2场效应晶体管 (FET),表现出n型特征. 由于在异构结构接口上形成2D电子气体,该设备实现了高载体流动性.
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:
- 像ReS2和MoS2这样的过渡金属二甲基化物 (TMD) 是用于电子设备的有希望的二维材料.
- 垂直堆叠的异构结构由于层间合而具有独特的电子特性.
- 场效应晶体管 (FET) 是现代电子产品的基本组件.
研究的目的:
- 为了研究垂直堆叠的ReS2/MoS2单极异极结构作为FET的性能.
- 为了描述制造的设备中的电气特性和载体传输机制.
- 了解接口上的二维电子气体 (2DEG) 在设备性能中的作用.
主要方法:
- 使用化学蒸汽沉积 (CVD) 制造垂直堆叠的ReS2/MoS2异构结构.
- 电气测量包括排水电流 (Ids) 与排水电压 (Vds) 和门电压 (Vgs) 扫描.
- 使用紫外光电子光谱 (UPS) 和紫外可见光谱 (UV-Visible Spectroscopy) 进行带结构的表征.
- 计算设备参数,如值电压和载体移动性.
主要成果:
- 该ReS2/MoS2 FET显示了n型半导体的特性.
- 实现了 60.97 厘米2 V^-1 s^-1 的高载体移动性.
- 紫外光电子光谱和紫外可见光谱证实了ReS2/MoS2接口上的二维电子气体 (2DEG) 的形成.
- 门电压被确定为大约12V.
结论:
- 垂直堆叠的ReS2/MoS2异构结构有效地作为n型FET运作.
- 观察到的高载体流动性归因于在接口上形成的2DEG.
- 在异质连接处对屏障高度的调制控制了场效应行为和电荷传输.
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