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Article: Positron annihilation spectroscopic study of hydrothermal grown n-type zinc oxide single crystal

TitlePositron annihilation spectroscopic study of hydrothermal grown n-type zinc oxide single crystal
Authors
Issue Date2007
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/102519628
Citation
Physica Status Solidi (C) Current Topics In Solid State Physics, 2007, v. 4 n. 10, p. 3672-3675 How to Cite?
AbstractPositron lifetime and coincidence Doppler broadening spectroscopic (CDBS) measurements were carried out to study the defects in two hydrothermal (HT) grown ZnO single crystal samples (HT1 and HT2) obtained from two companies. Single component model could offer good fittings to the room temperature spectra of HT1 and HT2, with the positron lifetimes equal to 199 ps and 181 ps respectively. These two lifetime components were associated with saturated positron trapping into two V Zn-related defects with different microstructures. The positron lifetimes of HT1 was found to be temperature independent. For the HT2 sample, the positron lifetime remained unchanged with T > 200 K and decreased with decreasing temperature as T<200K. This could be explained by the presence of an additional positron trap having similar electronic environment to that of the delocalized state and competing in trapping positrons with the 181 ps component at low temperatures. Positron-electron autocorrelation function, which was the finger-print of the annihilation site, was extracted from the CDBS spectrum. The obtained autocorrelation functions of HT1 and HT2 at room temperature, and HT2 at 50 K had features consistent with the above postulates that the 181 ps and the 199 ps components had distinct microstructures and the low temperature positron trap existed in HT2. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
Persistent Identifierhttp://hdl.handle.net/10722/80814
ISSN
2015 SCImago Journal Rankings: 0.392
References

 

DC FieldValueLanguage
dc.contributor.authorHui, CWen_HK
dc.contributor.authorZhang, ZDen_HK
dc.contributor.authorZhou, TJen_HK
dc.contributor.authorLing, CCen_HK
dc.contributor.authorBeling, CDen_HK
dc.contributor.authorFung, Sen_HK
dc.contributor.authorBrauer, Gen_HK
dc.contributor.authorAnwand, Wen_HK
dc.contributor.authorSkorupa, Wen_HK
dc.date.accessioned2010-09-06T08:10:34Z-
dc.date.available2010-09-06T08:10:34Z-
dc.date.issued2007en_HK
dc.identifier.citationPhysica Status Solidi (C) Current Topics In Solid State Physics, 2007, v. 4 n. 10, p. 3672-3675en_HK
dc.identifier.issn1862-6351en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80814-
dc.description.abstractPositron lifetime and coincidence Doppler broadening spectroscopic (CDBS) measurements were carried out to study the defects in two hydrothermal (HT) grown ZnO single crystal samples (HT1 and HT2) obtained from two companies. Single component model could offer good fittings to the room temperature spectra of HT1 and HT2, with the positron lifetimes equal to 199 ps and 181 ps respectively. These two lifetime components were associated with saturated positron trapping into two V Zn-related defects with different microstructures. The positron lifetimes of HT1 was found to be temperature independent. For the HT2 sample, the positron lifetime remained unchanged with T > 200 K and decreased with decreasing temperature as T<200K. This could be explained by the presence of an additional positron trap having similar electronic environment to that of the delocalized state and competing in trapping positrons with the 181 ps component at low temperatures. Positron-electron autocorrelation function, which was the finger-print of the annihilation site, was extracted from the CDBS spectrum. The obtained autocorrelation functions of HT1 and HT2 at room temperature, and HT2 at 50 K had features consistent with the above postulates that the 181 ps and the 199 ps components had distinct microstructures and the low temperature positron trap existed in HT2. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/102519628en_HK
dc.relation.ispartofPhysica Status Solidi (C) Current Topics in Solid State Physicsen_HK
dc.titlePositron annihilation spectroscopic study of hydrothermal grown n-type zinc oxide single crystalen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1610-1634&volume=4&spage=3672&epage=3675&date=2007&atitle=Positron+annihilation+spectroscopic+study+of+hydrothermal+grown+n-type+zinc+oxide+single+crystalen_HK
dc.identifier.emailLing, CC: ccling@hkucc.hku.hken_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityLing, CC=rp00747en_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/pssc.200675857en_HK
dc.identifier.scopuseid_2-s2.0-49949098698en_HK
dc.identifier.hkuros136991en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-49949098698&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume4en_HK
dc.identifier.issue10en_HK
dc.identifier.spage3672en_HK
dc.identifier.epage3675en_HK
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridHui, CW=7202876912en_HK
dc.identifier.scopusauthoridZhang, ZD=10640266000en_HK
dc.identifier.scopusauthoridZhou, TJ=8707410400en_HK
dc.identifier.scopusauthoridLing, CC=13310239300en_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.scopusauthoridBrauer, G=7101650540en_HK
dc.identifier.scopusauthoridAnwand, W=9432786300en_HK
dc.identifier.scopusauthoridSkorupa, W=7102608722en_HK

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