Understanding the defect structure of solution grown zinc oxide

Zinc oxide (ZnO) is a wide bandgap semiconducting oxide with many potential applications in various optoelectronic devices such as light emitting diodes (LEDs) and field effect transistors (FETs). Much effort has been made to understand the ZnO structure and its defects. However, one major issue in...

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Main Authors: Liew, Laura-Lynn., Sankar, Gopinathan., Goh, Gregory K. L., Kohara, Shinji., Handoko, Albertus Denny.
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/85283
http://hdl.handle.net/10220/11272
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-852832020-06-01T10:26:46Z Understanding the defect structure of solution grown zinc oxide Liew, Laura-Lynn. Sankar, Gopinathan. Goh, Gregory K. L. Kohara, Shinji. Handoko, Albertus Denny. School of Materials Science & Engineering Zinc oxide (ZnO) is a wide bandgap semiconducting oxide with many potential applications in various optoelectronic devices such as light emitting diodes (LEDs) and field effect transistors (FETs). Much effort has been made to understand the ZnO structure and its defects. However, one major issue in determining whether it is Zn or O deficiency that provides ZnO its unique properties remains. X-ray absorption spectroscopy (XAS) is an ideal, atom specific characterization technique that is able to probe defect structure in many materials, including ZnO. In this paper, comparative studies of bulk and aqueous solution grown (≤90 °C) ZnO powders using XAS and x-ray pair distribution function (XPDF) techniques are described. The XAS Zn–Zn correlation and XPDF results undoubtedly point out that the solution grown ZnO contains Zn deficiency, rather than the O deficiency that were commonly reported. This understanding of ZnO short range order and structure will be invaluable for further development of solid state lighting and other optoelectronic device applications. 2013-07-12T02:51:02Z 2019-12-06T16:00:53Z 2013-07-12T02:51:02Z 2019-12-06T16:00:53Z 2012 2012 Journal Article Liew, L. L., Sankar, G., Handoko, A. D., Goh, G. K., & Kohara, S. (2012). Understanding the defect structure of solution grown zinc oxide. Journal of Solid State Chemistry, 189, 63-67. 0022-4596 https://hdl.handle.net/10356/85283 http://hdl.handle.net/10220/11272 10.1016/j.jssc.2012.01.011 en Journal of solid state chemistry © 2012 Published by Elsevier Inc.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description Zinc oxide (ZnO) is a wide bandgap semiconducting oxide with many potential applications in various optoelectronic devices such as light emitting diodes (LEDs) and field effect transistors (FETs). Much effort has been made to understand the ZnO structure and its defects. However, one major issue in determining whether it is Zn or O deficiency that provides ZnO its unique properties remains. X-ray absorption spectroscopy (XAS) is an ideal, atom specific characterization technique that is able to probe defect structure in many materials, including ZnO. In this paper, comparative studies of bulk and aqueous solution grown (≤90 °C) ZnO powders using XAS and x-ray pair distribution function (XPDF) techniques are described. The XAS Zn–Zn correlation and XPDF results undoubtedly point out that the solution grown ZnO contains Zn deficiency, rather than the O deficiency that were commonly reported. This understanding of ZnO short range order and structure will be invaluable for further development of solid state lighting and other optoelectronic device applications.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Liew, Laura-Lynn.
Sankar, Gopinathan.
Goh, Gregory K. L.
Kohara, Shinji.
Handoko, Albertus Denny.
format Article
author Liew, Laura-Lynn.
Sankar, Gopinathan.
Goh, Gregory K. L.
Kohara, Shinji.
Handoko, Albertus Denny.
spellingShingle Liew, Laura-Lynn.
Sankar, Gopinathan.
Goh, Gregory K. L.
Kohara, Shinji.
Handoko, Albertus Denny.
Understanding the defect structure of solution grown zinc oxide
author_sort Liew, Laura-Lynn.
title Understanding the defect structure of solution grown zinc oxide
title_short Understanding the defect structure of solution grown zinc oxide
title_full Understanding the defect structure of solution grown zinc oxide
title_fullStr Understanding the defect structure of solution grown zinc oxide
title_full_unstemmed Understanding the defect structure of solution grown zinc oxide
title_sort understanding the defect structure of solution grown zinc oxide
publishDate 2013
url https://hdl.handle.net/10356/85283
http://hdl.handle.net/10220/11272
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