超低P型接触电阻通过蒸发的SNS接触器启用
Ying Zhang1,2, Huiting Wang1,2, Chang Liu1,3
1State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.
Nano letters
|February 10, 2026
概括
研究人员使用硫化 (SnS) 开发了一种新的半导体-半导体接触,以改进二维 (2D) 场效应晶体管 (FET). 这一策略克服了p型接触器的局限性,为二维互补金属氧化物半导体 (CMOS) 技术提供了更好的性能.
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 (2D) 半导体对于下一代电子产品至关重要,但可扩展的p型接触仍然是补充金属氧化物半导体 (CMOS) 扩展的重大挑战.
- 使用高工作功能的金属的现有方法往往导致费米级固定和高接触电阻,阻碍了设备的性能.
研究的目的:
- 为2D材料引入一种新的半导体-半导体范德瓦尔斯 (S-S vdW) 接触策略.
- 为了克服p型2D场效应晶体管 (p-FETs) 传统金属接触器的局限性.
主要方法:
- 使用硫化 (SnS) 作为WSe2晶体管的接触材料.
- 研究了通过SnS的低能量沉积来抑制金属诱导的间隙状态和缺陷诱导的间隙状态.
- 描述了SnS-WSe2晶体管的电性能.
主要成果:
- SnS接触器显示出最小的费米级定点和可以忽略不计的孔注入屏障,性能优于传统的金属接触器 (Pd,Pt).
- 在SnS-WSe2晶体管中实现了高开关比率 (>10^10) 和低接触电阻 (395 Ω μm).
- 证明了高状态电流密度 (1.11 mA μm^-1) 与短通道长度 (60 nm).
结论:
- SnS S-S vdW接触策略为高性能2D p-FET提供了一种实用和可靠的方法.
- 这项工作为2D材料在先进的CMOS技术中进行可扩展的集成铺平了道路.
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