相关实验视频
Updated: Jul 13, 2025

10:31
Developing High Performance GaP/Si Heterojunction Solar Cells
Published on: November 16, 2018
7.6K
基于范德瓦尔斯异质连接的高性能自动供电光探测器
Cong Yan1, Kun Yang1, Hao Zhang1
1Key Laboratory for Wide-Band Gap Semiconductor Materials and Devices of Education, The School of Microelectronics, Xidian University, Xi'an 710071, People's Republic of China.
Nanotechnology
|October 18, 2023
概括
研究人员开发了一种使用In2Se3/WSe2/ReS2范德瓦尔斯异质连接的新型自动供电光探测器. 该设备显著提高了光电流和响应速度,为低功耗,高性能光电子提供了有前途的解决方案.
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:
- 自动供电光探测器对于低功耗应用至关重要,但实现高响应性是具有挑战性的.
- 二维 (2D) 范德瓦尔斯异质连接为先进的光探测器设计提供了出色的光学和电气性能.
研究的目的:
- 制造和描述一个基于In2Se3/WSe2/ReS2范德瓦尔斯异质连接的自动供电光探测器.
- 调查ReS2层和后门电压在提高光探测器性能方面的作用.
主要方法:
- 使用In2Se3,WSe2和ReS2.2.制造一个三种材料的范德瓦尔斯异质连接.
- 描述光探测器的性能,包括响应能力,光电流和响应时间.
- 应用负后门电压来调节内置电场.
主要成果:
- 与In2Se3/WSe2/ReS2设备相比,In2Se3/WSe2/ReS2异质连接光探测器的响应率 (438 mA W-1) 增加了17倍.
- 观察到自动供电电流 (1.1 nA) 的显著提升和响应时间快250%.
- 添加ReS2层提高了光吸收和载波生成效率.
结论:
- 制造的In2Se3 / WSe2 / ReS2异质连接光探测器由于增强的内置电场和更广泛的耗尽区域,表现出卓越的性能.
- 这项工作为开发高响应性,低功耗和高速自动供电光探测器提供了新的技术途径.
相关概念视频
P-N junction
545
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
545
Schottky Barrier Diode
370
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
370
Biasing of P-N Junction
557
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
557
Photoelectric Effect
29.7K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
29.7K
Diode: Forward bias
1.1K
In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
The behavior of a diode in forward bias...
1.1K
Metal-Semiconductor Junctions
355
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...
355

