双层
工作职能
材料科学
肖特基二极管
调制(音乐)
电极
光电子学
背景(考古学)
凝聚态物理
费米能级
肖特基势垒
纳米技术
图层(电子)
化学
物理
二极管
量子力学
古生物学
生物化学
膜
声学
生物
电子
作者
Riho Nakajima,Tomonori Nishimura,K. Ueno,Kosuke Nagashio
出处
期刊:ACS applied electronic materials
[American Chemical Society]
日期:2023-12-26
标识
DOI:10.1021/acsaelm.3c01091
摘要
In order to attain high-performance p-type field-effect transistors (FETs) based on two-dimensional materials, it becomes imperative to mitigate Fermi level pinning. Employing Bi with a low work function of ∼4.2 eV, characterized by its low melting point, significant vapor pressure, and smaller density of states, has been instrumental in establishing pinning-free n-type contacts. In this context, we present a new approach for establishing p-type contacts. This approach involves the modulation of the effective work function through a bilayer electrode structure comprising ultrathin Bi and a thick Au with a high work function of ∼5.1 eV. The modulation of the effective work function has been clearly confirmed through capacitance─voltage measurements, conducted as a function of the thickness of the Bi layer. Consequent to these findings, a p-type WSe2 Schottky FET was demonstrated employing 2-nm-thick Bi/Au electrodes.
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