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Browse Journals & Magazines > Nanotechnology, IEEE Transact ...> Volume:11 Issue:6 Help

Field Emission of ZnO Nanowires in Low Vacuum Following Various Enhancements Made by Exposure to UV

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2 Author(s)
Cheng-Liang Hsu ; Dept. of Electr. Eng., Nat. Univ. of Tainan, Tainan, Taiwan ; Yao-Ching Tsai

High-density vertical ZnO nanowires (NWs) were synthesized by vapor phase transport deposition without a metal catalyst or template. The work function φ of ZnO NWs was reduced to 3.7 eV by exposure to UV. At a low vacuum of 10-3 Torr, the UV light improved the field emission performance and reduced the turn-on voltage such that they were better than those of normal field emission in a high vacuum. The depletion layer of NWs disappeared because surface O2- oxygen molecules were removed by exposure to UV light. The enhancement by UV remained even after the UV light had been turned off for 20 min.

Published in:
Nanotechnology, IEEE Transactions on  (Volume:11 ,  Issue: 6 )

Date of Publication: Nov. 2012

Page(s):
1110 - 1116
ISSN :
1536-125X
INSPEC Accession Number:
13146624
Digital Object Identifier :
10.1109/TNANO.2012.2212913
Product Type:
Journals & Magazines
Date of Publication :
10 August 2012
Date of Current Version :
16 November 2012
Issue Date :
Nov. 2012
Sponsored by :
IEEE Nanotechnology Council

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