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Article: Green emission in ZnO nanostructures - Examination of the roles of oxygen and zinc vacancies

TitleGreen emission in ZnO nanostructures - Examination of the roles of oxygen and zinc vacancies
Authors
KeywordsGreen Emission
Nanostructures
Photoluminescence
Zno
Issue Date2013
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc
Citation
Applied Surface Science, 2013, v. 271, p. 202-209 How to Cite?
AbstractGreen defect emission is commonly observed in ZnO nanostructures. It is frequently attributed to oxygen vacancies and used to evaluate performance and study physical mechanisms in a variety of applications, such as gas sensing and photocatalysis. However, competing hypotheses have been proposed to explain green emission, which raises questions about the role of oxygen vacancies in sensing and photocatalytic processes. The major problem in correct experimental identification of defects in ZnO is the abundance of defects present, while theoretically there are problems with accurate calculation of a defect energy level in the gap. Thus, here we adopted a different approach and studied experimentally and theoretically the interaction of ZnO with different chemical substances (hydrogen and a silane-based molecule). Based on theoretical predictions and experimental results, we can conclude that green emission can likely be assigned to defect complexes, which may contain zinc vacancies. © 2013 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185482
ISSN
2015 Impact Factor: 3.15
2015 SCImago Journal Rankings: 0.930
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLeung, YHen_US
dc.contributor.authorChen, XYen_US
dc.contributor.authorNg, AMCen_US
dc.contributor.authorGuo, MYen_US
dc.contributor.authorLiu, FZen_US
dc.contributor.authorDjurišić, ABen_US
dc.contributor.authorChan, WKen_US
dc.contributor.authorShi, XQen_US
dc.contributor.authorVan Hove, MAen_US
dc.date.accessioned2013-07-30T07:36:51Z-
dc.date.available2013-07-30T07:36:51Z-
dc.date.issued2013en_US
dc.identifier.citationApplied Surface Science, 2013, v. 271, p. 202-209en_US
dc.identifier.issn0169-4332en_US
dc.identifier.urihttp://hdl.handle.net/10722/185482-
dc.description.abstractGreen defect emission is commonly observed in ZnO nanostructures. It is frequently attributed to oxygen vacancies and used to evaluate performance and study physical mechanisms in a variety of applications, such as gas sensing and photocatalysis. However, competing hypotheses have been proposed to explain green emission, which raises questions about the role of oxygen vacancies in sensing and photocatalytic processes. The major problem in correct experimental identification of defects in ZnO is the abundance of defects present, while theoretically there are problems with accurate calculation of a defect energy level in the gap. Thus, here we adopted a different approach and studied experimentally and theoretically the interaction of ZnO with different chemical substances (hydrogen and a silane-based molecule). Based on theoretical predictions and experimental results, we can conclude that green emission can likely be assigned to defect complexes, which may contain zinc vacancies. © 2013 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsuscen_US
dc.relation.ispartofApplied Surface Scienceen_US
dc.subjectGreen Emissionen_US
dc.subjectNanostructuresen_US
dc.subjectPhotoluminescenceen_US
dc.subjectZnoen_US
dc.titleGreen emission in ZnO nanostructures - Examination of the roles of oxygen and zinc vacanciesen_US
dc.typeArticleen_US
dc.identifier.emailDjurišić, AB: dalek@hku.hken_US
dc.identifier.emailChan, WK: waichan@hku.hken_US
dc.identifier.authorityDjurišić, AB=rp00690en_US
dc.identifier.authorityChan, WK=rp00667en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.apsusc.2013.01.160en_US
dc.identifier.scopuseid_2-s2.0-84875366930en_US
dc.identifier.hkuros214374-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84875366930&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume271en_US
dc.identifier.spage202en_US
dc.identifier.epage209en_US
dc.identifier.isiWOS:000316787400028-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridLeung, YH=55440652500en_US
dc.identifier.scopusauthoridChen, XY=35274291400en_US
dc.identifier.scopusauthoridNg, AMC=55549733500en_US
dc.identifier.scopusauthoridGuo, MY=55598690500en_US
dc.identifier.scopusauthoridLiu, FZ=55599086400en_US
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_US
dc.identifier.scopusauthoridChan, WK=13310083000en_US
dc.identifier.scopusauthoridShi, XQ=55599041100en_US
dc.identifier.scopusauthoridVan Hove, MA=7102243564en_US

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