Enhanced field emission characteristics of WS 2 nano-films by diamond film and Mo film

被引：5

作者：

Wang, Jing-Chun ^{[1
]}

Wang, Xiao-Ping ^{[1
]}

Li, Xiao-Dan ^{[1
]}

Wang, Li-Jun ^{[1
]}

Xu, Feng-Di ^{[1
]}

Zhao, Bing-Chao ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Coll Sci, Shanghai 200093, Peoples R China

来源：

VACUUM | 2024年 / 225卷

关键词：

Field emission; WS2-Based nano-film; Diamond/WS2 nano-composite film; Mo/WS2 nano-composite film; ELECTRON-EMISSION; BINDING-ENERGY; CARBON; AFFINITY; TRANSITION;

D O I：

10.1016/j.vacuum.2024.113223

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WS 2 is a type of transition metal chalcogenide materials (TMDCs) that exhibits exceptional photoelectric properties. Due to its atomically sharp edges, WS 2 has the capability to enhance the electric field around its edges, thus presenting significant potential in field emission applications. In this study, the electron beam vapor deposition (EBVD) system and microwave plasma chemical vapor deposition (MPCVD) system were used to prepare a series of single -layer WS 2 films ,single-layer diamond films and diamond/WS 2 nano -composite films on N -type highly doped Si substrate, and Mo/WS 2 nano -composite films were prepared on Al 2 O 3 ceramic substrate. Based on the characterization and analysis of the microstructure and chemical composition of each thin film layer in the above film devices, the field emission (FE) characteristics of each thin film device are compared and studied. The results demonstrate that the maximum FE current density of diamond/WS 2 nano -composite film device is 912 mu A/cm 2 , which is 2.7 times of the maximum FE current density of Mo/WS 2 nano -composite film device 330 mu A/cm 2 , and 3.4 times of the maximum FE current density of the single -layer diamond thin film device 267 mu A/cm 2 . The single layer WS 2 film did not exhibit measurable FE performance. The working principles of thin film field emission devices with various structures are introduced. It is considered that the diamond layer plays the role of electron accelerating layer, which not only effectively improves the FE characteristics of diamond/WS 2 nanocomposite film, but also improves the repeatability and long-term stability of diamond/WS 2 nanocomposite film FE devices.

引用

页数：11

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