Premium
Highly Stable Field Emission from a Tungsten Diselenide Monolayer on Zinc Oxide Nanowire by Geometrically Modulating Hot Electrons
Author(s) -
Chen Yicong,
Liu Liwei,
Zheng Keshuang,
She Juncong,
Deng Shaozhi,
Xu Ningsheng,
Chen Jun
Publication year - 2019
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201900128
Subject(s) - tungsten diselenide , field electron emission , materials science , common emitter , nanowire , electron , tungsten , nanotechnology , zinc , monolayer , optoelectronics , curvature , physics , transition metal , chemistry , biochemistry , geometry , mathematics , quantum mechanics , metallurgy , catalysis
Compared with traditional thermal electron sources, field‐emission electron sources have many advantages, such as high brightness, coherence, and suitability for miniaturization. However, their instability has prevented their widespread use. Stable field emission from a hybrid structure with a tungsten diselenide (WSe 2 ) monolayer on zinc oxide (ZnO) nanowires is achieved by geometrically modulating the WSe 2 curvature. It is found that an emitter with a lower WSe 2 curvature induces hotter electrons during field emission, which results in a low turn‐on field and high stability. Considering the similarity of 2D materials, a general approach for obtaining a highly stable field emitter using a 2D–1D hybrid structure is provided.