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Show simple item record Mhlongo, Gugu H Ntwaeaborwa, OM Dhlamini, MS Swart, HC Hillie, KT 2018-01-04T10:46:37Z 2018-01-04T10:46:37Z 2010-10
dc.identifier.citation Mhlongo, G.H. et al. 2010. Cathodoluminescence properties of SiO2:Pr3+and ZnO.SiO2:Pr3+ phosphor nanopowders. Journal of Materials Science, vol. 45(19): 5228-5236 en_US
dc.identifier.issn 0022-2461
dc.identifier.issn 1573-4803
dc.description Copyright: 2010 Springer. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. en_US
dc.description.abstract The successful incorporation of ZnO nanoparticles in Pr3+-doped SiO2 using a sol–gel process is reported. SiO2:Pr3+ gels, with or without ZnO nanoparticles, were dried at room temperature and annealed at 600 °C. On the basis of the X-ray Diffraction (XRD) results, the SiO2 was amorphous regardless of the incorporation of Pr3+ and nanocrystalline ZnO or annealing at 600 °C. The particles were mostly spherical and agglomerated as confirmed by Field Emission Scanning Electron Microscopy. Thermogravimetric analysis of dried gels performed in an N2 atmosphere indicated that stable phases were formed at ≥900 °C. Absorption bands ascribed to 3H4-3P(J = 0,1,2), 1I6 and 1D2 in the UV–VIS region were observed from SiO2:Pr3+ colloids. The red cathodoluminescent (CL) emission corresponding to the 3P0 → 3H6 transition of Pr3+ was observed at 614 nm from dried and annealed SiO2:Pr3+ powder samples. This emission was increased considerably when ZnO nanoparticles were incorporated. The CL intensity was measured at an accelerating voltage of 1-5 keV and a fixed beam current of 8.5 μA. The effects of accelerating voltage on the CL intensity and the CL degradation of SiO2:Pr3+ and ZnO·SiO2:Pr3+were also investigated using Auger electron spectroscopy coupled with an Ocean Optics S2000 spectrometer. en_US
dc.language.iso en en_US
dc.publisher Springer en_US
dc.relation.ispartofseries Worklist;7881
dc.subject Pr3+ ions en_US
dc.subject Oxide phosphors en_US
dc.subject ZnO particles en_US
dc.subject Phosphor powders en_US
dc.title Cathodoluminescence properties of SiO2:Pr3+and ZnO.SiO2:Pr3+ phosphor nanopowders en_US
dc.type Article en_US

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