极化敏感,自动供电和宽带半金属MoTe2/MoS2范德瓦尔斯异质连接用于光检测和成像
Lingxian Kong1, Guangliang Li2, Qi Su2
1State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
ACS applied materials & interfaces
|August 17, 2023
概括
这项研究引入了一种用于先进光探测器的新型2D MoTe2/MoS2异质连接. 该设备提供自动供电,宽带和偏振敏感的光检测,性能和成像能力得到了改进.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
背景情况:
- 第二种类型的韦尔半金属1T'MoTe2由于其狭窄的带隙和异构性,对极化敏感的光学探测器充满希望.
- 然而,半金属的特性导致高暗电流和低响应,限制了设备的性能.
研究的目的:
- 开发一个全2D MoTe2/MoS2 范德瓦尔斯异质连接,以提高光探测器的性能.
- 为了实现极化敏感,自动供电和宽带光检测和成像.
主要方法:
- 一个2D MoTe2/MoS2范德瓦尔斯异质连接的制造.
- 设备的光响应,响应性,检测性,响应时间和开/关比的表征.
- 对波长依赖的光电流异质性和极化成像能力的评估.
主要成果:
- 异质连接表现出自动供电的光响应从520到1550nm.
- 实现了高性能指标:响应率为79mA/W,检测能力为1.2×10^10斯,响应时间为~180μs,开/关比为1.3×10^3.
- 显著的光电异性 (高达2.24) 和增强的极化成像对比度 (DoLP为78%,AoLP为112%).
结论:
- MoTe2/MoS2异质连接有效地克服了纯MoTe2的局限性,使高性能自动供电光探测器成为可能.
- 展示了先进的偏振敏感光检测和下一代偏振成像应用的潜力.
更多相关视频
08:12Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
12.4K
08:50Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
9.2K
相关概念视频
01:24Metal-Semiconductor Junctions
386
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...
386
01:27Biasing of Metal-Semiconductor Junctions
281
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
281