半导体PtSe2和金属PtTe2的可逆转换用于可扩展的全二维边缘接触FET
Sang Sub Han1, Shahid Sattar2, Dmitry Kireev3,4,5
1NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States.
Nano letters
|December 27, 2023
概括
研究人员使用二化 (PtSe2) 和二化 (PtTe2) 边缘接触器开发了厘米尺度的所有2D场效应晶体管 (FET) 阵列. 这种可扩展的方法提高了FET的性能,为先进的2D-TMD电路系统铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态物理 固态物理
背景情况:
- 二维 (2D) 过渡金属二甲基化物 (TMD) 层对原子级场效应晶体管 (FET) 显示出前景.
- 在扩大规模的FET中将2D材料与常规金属电极集成,由于范德瓦尔斯 (vdW) 粘合,面临着挑战.
- 在缩放的2D FET中实现卓越的性能需要克服接触限制.
研究的目的:
- 为所有2D FET阵列开发可扩展的制造方法.
- 通过使用新的边缘接触来解决2D-TMD FET中的接触挑战.
- 通过使用带有集成边缘接触的2D材料来证明FET的性能改善.
主要方法:
- 制造几厘米尺度的化 (PtSe2) FET 阵列.
- 整合平面内二化物 (PtTe2) 作为金属边缘接触.
- 使用低温离子交换反应实现可逆的PtSe2/PtTe2过渡.
- 与后端 (BEOL) 半导体制造工艺的兼容性.
主要成果:
- 实现了厘米尺度的所有2D FET阵列与无边缘接触.
- 证明了半导体PtSe2和金属PtTe2.2之间的可逆转变.
- 与PtTe2边缘接触器的All-2D PtSe2 FET显示,与黄金表面接触器相比,载体移动性和开/关比在数量级上有所改善.
- 在室温下达到大约50.30cm^2V^-1s^-1的最大孔移动性.
结论:
- 成功开发了一种可扩展的方法,用于使用PtSe2和PtTe2边缘接触器制造所有2D FET.
- 新的边缘接触策略显著提高了2D-TMD FETs的性能.
- 这项工作为基于2D-TMD的先进,原子薄的电路带来了改进的功能.
相关概念视频
Field Effect Transistor
414
Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
414
Metal-Semiconductor Junctions
352
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
352
MOSFET
474
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
In an n-MOSFET, the structure includes n-type source and drain...
474
MOSFET: Enhancement Mode
339
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
339
Fermi Level
607
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
607
Biasing of FET
283
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
283


