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Metal-Semiconductor Junctions

Metal-Semiconductor Junctions

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...

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Updated: Jul 6, 2025

Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes

Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes

Published on: March 21, 2018

可擦除的过渡金属基化物半导体NbSe₂I₂

Kejian Qu^1,2, Yue Zhang³, Cheng Peng⁴

¹Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.

Inorganic chemistry

|January 4, 2024

概括

我们合成了三临床的二二氧化 (NbSe2I2),一种新型的半导体材料. 脱皮的NbSe2I2保留了其晶体结构,并表现出独特的电子特性,对先进的电子有价值.

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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

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Published on: December 5, 2015

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Last Updated: Jul 6, 2025

Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes

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Published on: March 21, 2018

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

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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:

剥皮的范德瓦尔斯异构结构的日益复杂性需要具有不同对称性的新材料.
探索新的分层材料对于推进二维电子技术至关重要.

研究的目的:

合成和描述一种具有独特结晶学特性的新范德瓦尔斯材料NbSe2I2.
为了研究NbSe2I2在电子领域的潜在应用中,对NbSe2I2的可剥离性和电子特性进行调查.

主要方法:

有效的化学蒸汽运输合成NbSe2I2.2.
剥落到几层和单层结构.
使用拉曼光谱,X射线衍射 (XRD),密度函数理论 (DFT) 计算和物理属性测量 (运输,热,光学,磁性) 的表征.

主要成果:

成功合成三临床NbSe2I2 (空间组P1̅) 与Nb-Nb二次体以及特定的内平面角 (γ = 61.3°).
证明了剥离能力到单层薄膜,保存的晶体结构通过拉曼光谱和XRD证实.
DFT计算预测半导体带间隙为1 eV,无论是批量还是单层NbSe2I2.2.
物理性质测量显示NbSe2I2是一种二磁半导体,在室温以下没有相变.

结论:

由于其独特的结构和半导体特性,Triclinic NbSe2I2是皮电子产品的一个有前途的新材料.
该材料的稳定性和可调节的电子特性使其适用于复杂的异构结构.
对NbSe2I2的进一步研究可能会为低维电子设备开启新的可能性.