Surface conduction electron emission of ZnO nanostructures

This paper describes a study on the surface conduction electron emission of ZnO tetrapods, which were synthesized by the oxidation of Zn vapor. With an insulator of thickness 100 mum, the turn-on voltage was 540 V in the surface conduction structure and 750 V in the conventional cathode-gate field e...

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Bibliographic Details
Published in:Nanotechnology 2007-08, Vol.18 (33), p.335204-335204 (5)
Main Authors: Hou, Kai, Li, Chi, Lei, Wei, Zhang, Xiaobing, Gu, Wei, Engelsen, Daniel den
Format: Article
Language:English
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Summary:This paper describes a study on the surface conduction electron emission of ZnO tetrapods, which were synthesized by the oxidation of Zn vapor. With an insulator of thickness 100 mum, the turn-on voltage was 540 V in the surface conduction structure and 750 V in the conventional cathode-gate field emission structure. At the same gate voltage, the surface conduction structure had a much larger anode current density. It was found that electrical activation of the ZnO-tetrapod layer greatly enhanced the electron emission. After activation, the turn-on voltage was 40 V, and the emission current density reached 0.49 mA cm-2 at an applied voltage of 150 V. A preliminary theory on the surface conduction electron emission of ZnO is presented.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/18/33/335204