BROWSE

Related Researcher

Author's Photo

Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

ITEM VIEW & DOWNLOAD

Enhancement of field-emission properties in ZnO nanowire array by post-annealing in H 2 ambient

Cited 21 times inthomson ciCited 19 times inthomson ci
Title
Enhancement of field-emission properties in ZnO nanowire array by post-annealing in H 2 ambient
Author
Park, Kyung-SooChoi, Young-JinAhn, Myoung-WonKim, Dong-WanSung, Yun-MoPark, Jae-GwanChoi, Kyoung Jin
Keywords
Field emission;  Nanowires;  Post-annealing;  Turn-on field;  Work function
Issue Date
2009-07
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.9, no.7, pp.4328 - 4332
Abstract
We studied the effects of post-annealing in H-2 and O-2 ambients on field-emission properties of vertically-aligned ZnO nanowire arrays synthesized by carbothermal reduction process. The turn-on electric field was dramatically decreased from 3.78 to 2.37 V/mu m after post-annealing in H-2 ambient, which was explained by both hydrogen passivation effects of deep levels and surface modification. In other words, we could observe significant decrease of deep level peak in photoluminescence measurements on hydrogen post-annealed ZnO nanowire array. And also hydrogen-related bonds are strongly increased from X-ray photoelectron spectroscopy measurements. These findings suggest that the concentration of conduction electrons increased by hydrogen post-annealing, which results in the enhanced tunneling probability of conduction electrons into the vacuum.
URI
https://scholarworks.unist.ac.kr/handle/201301/7614
DOI
10.1166/jnn.2009.M54
ISSN
1533-4880
Appears in Collections:
MSE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU