O/P-Si接触电气化的调制机制,通过接触电气连接处的紫外线激发的光载体进行电气化
Jia Tian1,2, Yue He1,2, Danyang Huang1,2
1School of Microelectronics, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
ACS applied materials & interfaces
|March 13, 2025
概括
自动供电的紫外线 (UV) 光探测器使用 triboelectric 纳米发电机 (TENG). 这项研究阐明了UV光如何通过影响载体转移来调节TENGs,从而实现了更好的UV光检测应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 光电学是指光电子产品.
背景情况:
- 自动供电的紫外线 (UV) 光探测器是一个关键的研究领域.
- 三电纳米发电机 (TENGs) 对自动供电的紫外线光检测有希望.
- 在TENG中接触电气化的紫外线光调制机制仍然不清楚.
研究的目的:
- 为了研究ZnO/P-Si接触电气化 (CE) 的紫外线光调制机制.
- 在紫外线照明后探索ZnO/P-Si CE中的光放松现象.
- 增强TENGs在UV光检测中的应用潜力.
主要方法:
- 通过改变紫外线光波长和强度来研究ZnO/P-Si CE调制.
- 通过在摩擦对分离过程中控制紫外线光线来分析光放松现象.
- 利用能量频段图模型来解释接触电联接口 (CEJ) 中的载体迁移.
主要成果:
- 紫外线光显著控制ZnO/P-Si CE输出性能.
- 较短的紫外线波长 (254 nm) 和更高的强度导致更大的性能降低.
- 紫外线光会诱导近似费米能量水平的分裂,减少净载体转移和CE输出.
- 观察到与光载体重组率相关的光放松现象.
结论:
- 紫外线光通过CEJ中的载体动态调节半导体-半导体CE.
- 能量带图模型有效地解释了紫外线对CE的影响.
- 这项研究促进了对UV-TENG相互作用的理解,以改善光检测.
相关概念视频
Metal-Semiconductor Junctions
264
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...
264
P-N junction
441
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...
441
Biasing of Metal-Semiconductor Junctions
185
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...
185
Schottky Barrier Diode
277
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...
277
Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
Carrier Generation and Recombination
482
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
482


