Influence of concentration and sintering temperature on luminescence properties of Eu3+:SnO2 nanocrystallites

The nanopowders of SnO2 doped with different Eu3+ concentrations were synthesized using the modified Pechini method. The Eu3+ concentrations were high above solubility limit. The average size of crystallites was controlled by the sintering temperatures. The structure and the morphology of obtained p...

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Bibliographic Details
Published in:Journal of rare earths 2012-07, Vol.30 (7), p.627-631
Main Authors: Psuja, P., Strek, W.
Format: Article
Language:English
Subjects:
Crystallites
Eu3
luminescence
nanocrystallites
Nanocrystals
Nanostructure
phosphors
Rare earth metals
rare earths
Silver
Sintering (powder metallurgy)
SnO2
Tin dioxide
Tin oxides
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Summary:The nanopowders of SnO2 doped with different Eu3+ concentrations were synthesized using the modified Pechini method. The Eu3+ concentrations were high above solubility limit. The average size of crystallites was controlled by the sintering temperatures. The structure and the morphology of obtained powders were examined using the XRD (X-ray diffraction) and TEM (transmission electron microscopy) analyses. The Eu2Sn2O7 phase separation was observed at relatively high concentration of Eu3+ ions. The ZnS:Ag micropowders were mixed with the Eu3+:SnO2 powders and their normalized emission was used to measure a relative efficiency of Eu3+:SnO2. The photoluminescence spectra of mixed powders were measured in function of Eu3+ concentration and average size of nanocrystallites. The reference peak method was used for comparison of intensities of the samples and selection of optimal one. The influence of the average grain size and Eu3+ concentration on the phosphor's efficiency was discussed. The presented results confirmed the rightness of synthesis of the Eu3+:SnO2 in form of nanocrystalites with relatively high Eu3+ concentration.
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60102-1