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Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor

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dc.contributor.author Mbule, PS
dc.contributor.author Mhlongo, Gugu H
dc.contributor.author Pitale, SS
dc.contributor.author Swart, HC
dc.contributor.author Ntwaeaborwa, OM
dc.date.accessioned 2012-04-16T12:34:03Z
dc.date.available 2012-04-16T12:34:03Z
dc.date.issued 2012-05
dc.identifier.citation Mbule, PS, Mhlongo, GH, Pitale, SS, Swart, HC and Ntwaeaborwa, OM. 2012. Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor. Physica B, vol. 407(10), pp 1607-1610 en_US
dc.identifier.issn 0921-4526
dc.identifier.uri http://www.sciencedirect.com/science/article/pii/S0921452611009884
dc.identifier.uri http://hdl.handle.net/10204/5766
dc.description Copyright: 2011 Elsevier. This is the post-print version of the work. The definitive version is published in Physica B, vol. 407(10), pp 1607-1610 en_US
dc.description.abstract In this study, red cathodoluminescence (CL) ( emission=614 nm) was observed from Pr3+ ions in a glassy (amorphous) SiO2 host. This emission was enhanced considerably when ZnO quantum dots (QDs) were incorporated in the SiO2:Pr3+ suggesting that the ZnO QDs transferred excitation energy to Pr3+ ions. That is, ZnO QDs acted to sensitize the Pr3+ emission. The sol–gel method was used to prepare ZnO–SiO2:Pr3+ phosphors with different molar ratios of Zn to Si. The effects of the ZnO QDs concentration and the possible mechanisms of energy transfer from ZnO to Pr3+ are discussed. In addition, the electronic states and the chemical composition of the ZnO–SiO2:Pr3+ phosphors were analyzed using X-ray photoelectron spectroscopy (XPS). en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;7878
dc.subject Quantum dots en_US
dc.subject Phosphor en_US
dc.subject Absorption en_US
dc.subject Cathodoluminescence en_US
dc.title Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor en_US
dc.type Article en_US
dc.identifier.apacitation Mbule, P., Mhlongo, G. H., Pitale, S., Swart, H., & Ntwaeaborwa, O. (2012). Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor. http://hdl.handle.net/10204/5766 en_ZA
dc.identifier.chicagocitation Mbule, PS, Gugu H Mhlongo, SS Pitale, HC Swart, and OM Ntwaeaborwa "Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor." (2012) http://hdl.handle.net/10204/5766 en_ZA
dc.identifier.vancouvercitation Mbule P, Mhlongo GH, Pitale S, Swart H, Ntwaeaborwa O. Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor. 2012; http://hdl.handle.net/10204/5766. en_ZA
dc.identifier.ris TY - Article AU - Mbule, PS AU - Mhlongo, Gugu H AU - Pitale, SS AU - Swart, HC AU - Ntwaeaborwa, OM AB - In this study, red cathodoluminescence (CL) ( emission=614 nm) was observed from Pr3+ ions in a glassy (amorphous) SiO2 host. This emission was enhanced considerably when ZnO quantum dots (QDs) were incorporated in the SiO2:Pr3+ suggesting that the ZnO QDs transferred excitation energy to Pr3+ ions. That is, ZnO QDs acted to sensitize the Pr3+ emission. The sol–gel method was used to prepare ZnO–SiO2:Pr3+ phosphors with different molar ratios of Zn to Si. The effects of the ZnO QDs concentration and the possible mechanisms of energy transfer from ZnO to Pr3+ are discussed. In addition, the electronic states and the chemical composition of the ZnO–SiO2:Pr3+ phosphors were analyzed using X-ray photoelectron spectroscopy (XPS). DA - 2012-05 DB - ResearchSpace DP - CSIR KW - Quantum dots KW - Phosphor KW - Absorption KW - Cathodoluminescence LK - https://researchspace.csir.co.za PY - 2012 SM - 0921-4526 T1 - Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor TI - Sensitizing effects of ZnO quantum dots on red-emitting Pr3+-doped SiO2 phosphor UR - http://hdl.handle.net/10204/5766 ER - en_ZA


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