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Article: Photoluminescence and electron paramagnetic resonance of ZnO tetrapod structures

TitlePhotoluminescence and electron paramagnetic resonance of ZnO tetrapod structures
Authors
Issue Date2004
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm
Citation
Advanced Functional Materials, 2004, v. 14 n. 9, p. 856-864 How to Cite?
AbstractZnO tetrapod nanostructures have been prepared by the evaporation of Zn in air (no flow), dry and humid argon flow, and dry and humid nitrogen flow. Their properties have been investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies (at different temperatures), and electron paramagnetic resonance (EPR) spectroscopy at -160 °C and room temperature. It is found that the fabrication conditions significantly influence the EPR and PL spectra obtained. While a g=1.96 EPR signal is present in some of the samples, green PL emission can be observed from all the samples. Therefore, the green emission in our samples does not originate from the commonly assumed transition between a singly charged oxygen vacancy and a photoexcited hole [K. Vanheusden, C. H. Seager, W. L. Warren, D. R. Tallant, J. A. Voigt, Appl. Phys. Lett. 1996, 68, 403]. However, the green emission can be suppressed by coating the nanostructures with a surfactant for all fabrication conditions, which indicates that this emission originates from surface defects.
Persistent Identifierhttp://hdl.handle.net/10722/70430
ISSN
2015 Impact Factor: 11.382
2015 SCImago Journal Rankings: 5.210
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDjurišić, ABen_HK
dc.contributor.authorChoy, WCHen_HK
dc.contributor.authorRoy, VALen_HK
dc.contributor.authorLeung, YHen_HK
dc.contributor.authorKwong, CYen_HK
dc.contributor.authorCheah, KWen_HK
dc.contributor.authorRao, TKGen_HK
dc.contributor.authorChan, WKen_HK
dc.contributor.authorLui, HFen_HK
dc.contributor.authorSurya, Cen_HK
dc.date.accessioned2010-09-06T06:22:48Z-
dc.date.available2010-09-06T06:22:48Z-
dc.date.issued2004en_HK
dc.identifier.citationAdvanced Functional Materials, 2004, v. 14 n. 9, p. 856-864en_HK
dc.identifier.issn1616-301Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/70430-
dc.description.abstractZnO tetrapod nanostructures have been prepared by the evaporation of Zn in air (no flow), dry and humid argon flow, and dry and humid nitrogen flow. Their properties have been investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies (at different temperatures), and electron paramagnetic resonance (EPR) spectroscopy at -160 °C and room temperature. It is found that the fabrication conditions significantly influence the EPR and PL spectra obtained. While a g=1.96 EPR signal is present in some of the samples, green PL emission can be observed from all the samples. Therefore, the green emission in our samples does not originate from the commonly assumed transition between a singly charged oxygen vacancy and a photoexcited hole [K. Vanheusden, C. H. Seager, W. L. Warren, D. R. Tallant, J. A. Voigt, Appl. Phys. Lett. 1996, 68, 403]. However, the green emission can be suppressed by coating the nanostructures with a surfactant for all fabrication conditions, which indicates that this emission originates from surface defects.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afmen_HK
dc.relation.ispartofAdvanced Functional Materialsen_HK
dc.titlePhotoluminescence and electron paramagnetic resonance of ZnO tetrapod structuresen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1616-301X&volume=14&spage=856&epage=864&date=2004&atitle=Photoluminescence+and+electron+paramagnetic+resonance+of+ZnO+tetrapod+structuresen_HK
dc.identifier.emailDjurišić, AB: dalek@hku.hken_HK
dc.identifier.emailChoy, WCH: chchoy@eee.hku.hken_HK
dc.identifier.emailChan, WK: waichan@hku.hken_HK
dc.identifier.authorityDjurišić, AB=rp00690en_HK
dc.identifier.authorityChoy, WCH=rp00218en_HK
dc.identifier.authorityChan, WK=rp00667en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adfm.200305082en_HK
dc.identifier.scopuseid_2-s2.0-6444233032en_HK
dc.identifier.hkuros96350en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-6444233032&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume14en_HK
dc.identifier.issue9en_HK
dc.identifier.spage856en_HK
dc.identifier.epage864en_HK
dc.identifier.isiWOS:000224353500004-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_HK
dc.identifier.scopusauthoridChoy, WCH=7006202371en_HK
dc.identifier.scopusauthoridRoy, VAL=7005870324en_HK
dc.identifier.scopusauthoridLeung, YH=7201463866en_HK
dc.identifier.scopusauthoridKwong, CY=35917741900en_HK
dc.identifier.scopusauthoridCheah, KW=7102792922en_HK
dc.identifier.scopusauthoridRao, TKG=8057786700en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK
dc.identifier.scopusauthoridLui, HF=36815539600en_HK
dc.identifier.scopusauthoridSurya, C=7003939256en_HK

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