Fabrication of alkali metal sulfate–doped zinc tungstate and their photoluminescence

The enhancement of photoluminescence of alkali metal sulfate-doped zinc tungstate was investigated. All samples were prepared by solid-state reaction at 800 °C using ZnO, WO3, and alkali metal sulfates as starting powders. The zinc tungstate phase was confirmed from the samples by X-ray diffraction....

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Published inJournal of luminescence Vol. 207; pp. 333 - 338
Main Authors Lorchirachoonkul, Prinya, Nakata, Masaya, Okamoto, Tomoichiro
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2019
Subjects
Alkali metal
Photoluminescence
Solid-state reaction
Sulfate
Zinc tungstate
Zinc tungstate
Solid-state reaction
Alkali metal
Sulfate
Photoluminescence
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Summary:The enhancement of photoluminescence of alkali metal sulfate-doped zinc tungstate was investigated. All samples were prepared by solid-state reaction at 800 °C using ZnO, WO3, and alkali metal sulfates as starting powders. The zinc tungstate phase was confirmed from the samples by X-ray diffraction. The emission peak of the samples excited at 275 nm was observed at 465 nm. Rb2SO4 > K2SO4 > Cs2SO4 > undoped > Na2SO4 > Li2SO4 was the order of peak emission intensity of alkali metal sulfate-doped samples. Alkali metals with a large ionic radius (K, Rb, Cs) enhanced the emission of intrinsic luminescence in the blue wavelength region. Moreover, sulfates had the potential to change the luminescence activities of the samples.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2018.11.025