范德瓦尔斯CoS2的受控合成,用于改进的p型晶体管接触式晶体管
Yao Wang1, Chaocheng Liu1, Hengli Duan1
1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, People's Republic of China.
Nanotechnology
|October 5, 2023
概括
研究人员开发了一种新的2D二硫化物 (CoS2) 纳米板接触器,用于二二化物 (WSe2) 场效应晶体管 (FET). 这项创新通过降低二维p型半导体中的Schottky障碍来显著提高设备性能.
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:
- 原子薄的二维 (2D) 范德瓦尔斯 (vdW) p型半导体对电子设备具有前景.
- 在p型半导体金属接触处的费米级固定导致高的肖特基孔屏障,限制了设备的性能.
研究的目的:
- 研究使用2D vdW 1T-CoS2纳米片作为WSe2场效应晶体管 (FET) 的接触电极.
- 为了应对2D p型半导体金属接触器中高斯科特基孔屏障的挑战.
主要方法:
- 制造VDW 1T-CoS2纳米板.
- 将CoS2纳米片集成为WSe2FET的接触电极.
- CoS2纳米板导电性和WSe2 FET性能的表征.
主要成果:
- CoS2纳米板具有厚度依赖的金属导电性,性能优于其他2D材料.
- 带有CoS2接触的WSe2FET实现了高开/关比 (>10^7) 和孔移动性 (~114.5 cm^2 V^-1 s^-1).
- CoS2 的高工作功能有效地降低了 Schottky 孔屏障.
结论:
- vdW 1T-CoS2纳米片作为2D p型半导体的有效接触电极.
- 这种方法显著提高了WSe2 FETs的性能.
- 该研究为制造CoS2提供了一种可行的方法,并扩大了电子领域2D p型半导体的应用.
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