Enhanced field emission density current of a planar triode structure with double cathodes

Linhu Zheng,ZhuoYa Zhu,Wei Lei,Xiaobing Zhang,Huan Feng,YaJun Sun,Zheng Hu

2012 IEEE 9th International Vacuum Electron Sources Conference, IVESC 2012（2012）

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摘要

Field emission properties of a planar triode structure with double cathodes have been investigated. ZnO nanotetrapod emitters mixed with carbon nanotubes(CNTs) were fabricated by the screen-printing method. The potential distribution, electron trajectoryies distribution and current density distribution were simulated in detail with CST PARTICLE STUDIO code. A higher field emission density current was obtained in the double-cathode structure. We found the gate played an important role in the anode current enhancement by focusing effect. © 2012 IEEE.

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关键词

cnts,field emission,focusing effect,zno,wide band gap semiconductors,anodes,triodes,zinc oxide,trajectory,carbon nanotubes,logic gates,electric potential,current density,electron density,cathodes

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