標題: Field emission property of carbon nanotube field emitters in triode structure fabricated with anodic aluminum oxide templates
作者: Li, Yiming
Cheng, Hui-Wen
Lin, Chen-Chun
Pan, Fu-Ming
材料科學與工程學系
電信工程研究所
Department of Materials Science and Engineering
Institute of Communications Engineering
關鍵字: carbon nanotubes;anodic aluminum oxide;triode structure;field emission;Maxwell's equation;Lorentz equation;numerical simulation;FDTD-PIC method;Fowler-Nordheim equation
公開日期: 1-四月-2008
摘要: In this work, we study the field emission (FE) properties of carbon nanotubes (CNTs) field emitters in the triode structure fabricated with anodic aluminum oxide (AAO) template. To obtain the self-consistent solution, a set of Maxwell's equations coupling with Lorentz equation are solved simultaneously using finite difference time domain (FDTD) particle-in-cell (PIC) method. The FE current is then computed with the Fowler-Nordheim equation. To validate our simulation model, we firstly calibrate the collected electron current density between the measurement data of fabricated AAO-CNTs and simulation result. We find that the high density of CNTs will result in large screening effect among adjacent emitters and reduce the strength of electric field. Consequently, it significantly affects the collected emission current density. Our prediction shows that more than three-order magnitude difference on the collected emission current density could be observed when the spacing between CNTs is decreased from 0.7 to 0.233 mu m for the explored structure with the diameter of 7 mu m. Effects of random heights and thickness of oxide on the FE property of structure are also discussed.
URI: http://dx.doi.org/10.1143/JJAP.47.3282
http://hdl.handle.net/11536/29965
ISSN: 0021-4922
DOI: 10.1143/JJAP.47.3282
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS
Volume: 47
Issue: 4
起始頁: 3282
結束頁: 3286
顯示於類別:會議論文


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  1. 000255449100212.pdf