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Stable Electron Emission from ZnO Nanoemitters Grown with Pseudo-Catalyst

Published online by Cambridge University Press:  04 July 2014

Su-Hua Yang
Affiliation:
Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan, R.O.C.
Yi-Ming Hsu
Affiliation:
Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan, R.O.C.
Ming-Wei Tsai
Affiliation:
Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan, R.O.C.
Ting-Jen Hsueh
Affiliation:
National Nano Devices Laboratories, Tainan 741, Taiwan, R.O.C.
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Abstract

Catalyst-free vapor phase transport was applied for the growth of ZnO nanoemitters. A single-crystalline ZnO:Al seed layer was deposited and used as a pseudo-catalyst. The desired morphology of nanostructures can be achieved by means of modifying the growth rates of crystal planes via adjustment in the growth conditions. The field emission characteristics of ZnO nanoemitters satisfied the Fowler-Nordheim relationship. The high aspect ratio of nanoemitters had a low turn-on electric field of 0.18 MV/m at emission current density of 0.1 μA/cm2. A stable electron emission with a variation of less than 14% was measured.

Type
Articles
Copyright
Copyright © Materials Research Society 2014 

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References

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