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Effects of hydrogen plasma treatment on sol-gel-derived ZnO studied by impedance spectroscopy

Authors
Kim, Se-HunHan, J. H.Oh, B. H.Park, J. K.Lee, S.Jeong, S-YLee, Cheol Eui
Issue Date
7월-2017
Publisher
IOP PUBLISHING LTD
Keywords
ZnO; hydrogen plasma treatment; impedance spectroscopy
Citation
MATERIALS RESEARCH EXPRESS, v.4, no.7
Indexed
SCIE
SCOPUS
Journal Title
MATERIALS RESEARCH EXPRESS
Volume
4
Number
7
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/83056
DOI
10.1088/2053-1591/aa6f36
ISSN
2053-1591
Abstract
Effects of hydrogen plasma treatment on the electrical properties of a sol-gel-derived polycrystalline zinc oxide (ZnO) system have been studied by employing impedance spectroscopy. Complex impedance data were analyzed by employing an equivalent circuit. Hydrogen plasma treatment markedly increased the low-frequency range of constant values of the real part of complex impedance. As a result of plasma treatment, electrical conductivity was found to increase by about two orders of magnitude, with the activation energy being reduced from 0.62 eV to 0.30 eV. The dielectric constant also showed a two-fold increase following the plasma treatment.
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