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An Analytical Modeling of Field Electron Emission for a Vertical Wedged Ordered Nanostructure

Authors :
Peng Ye
Yan Shen
Shaozhi Deng
Jun Chen
Fei Liu
Ningsheng Xu
Yu Zhang
Juncong She
Source :
Advanced Electronic Materials. 3:1700295
Publication Year :
2017
Publisher :
Wiley, 2017.

Abstract

The development of field electron emission materials requires purposeful analytical modeling of structural features. A vertical wedged ordered nanostructure shows better field emission current density because of its in-plane continuity at the top emission edge: Individually, its calculated average current density can be 8.3–26.7 times larger than a tapered nanostructure when its bottom area s increases from 0.5 to 2.5 µm2, can be 2.2–12.7 times as its radius of top curvature r decreases from 65 to 5 nm, and can be 7.3–17.3 times as its length L increases from 0.5 to 5 µm. For an ordered nanostructure array, its average current density can be about 160 times larger than the a reference tapered array when the individual elements are closely aligned. Over three orders of magnitude improvment can be observed when optimal emitter spacing conditions are used. Structural analytical models and numerical simulation prove to be in good correspondence with previously reported experimental data, and may serve as a guide for the design and preparation of field electron emission materials with a clear purpose in the future.

Details

ISSN :
2199160X
Volume :
3
Database :
OpenAIRE
Journal :
Advanced Electronic Materials
Accession number :
edsair.doi...........b1653843938887b2a320d2063ceaaf66
Full Text :
https://doi.org/10.1002/aelm.201700295