Improved luminescence properties of Na2TiSiO5 phosphor by the Ge4+ doping in the crystal lattice

Rare earth free white emitting Na2TiSi1−xGexO5 phosphors were synthesized by a conventional solid-state reaction method, and the photoluminescence properties were characterized. The phosphors obtained in the present study showed broad bluish-white emission with a peak at 485 nm due to the charge tra...

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Published inJournal of Ceramic Processing Research Vol. 20; no. 5; pp. 460 - 463
Main Authors Young Ji Park, Kazuma Sugimoto, Mineo Satod, Koudai Tanima, Kazuyoshi Uematsu, Kenji Toda, Sun Woog Kim, Takuya Hasegawa
Format Journal Article
LanguageEnglish
Published 세라믹연구소 01.10.2019
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재료공학
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Summary:Rare earth free white emitting Na2TiSi1−xGexO5 phosphors were synthesized by a conventional solid-state reaction method, and the photoluminescence properties were characterized. The phosphors obtained in the present study showed broad bluish-white emission with a peak at 485 nm due to the charge transfer transition between O2− and Ti4+ and the emission peak intensity was effectively enhanced by the Ge4+ doping in the Na2TiSiO5 crystal lattice. The emission peak intensity of Na2TiSi0.5Ge0.5O5 was 1.35 times higher than that of Na2TiSiO5 and the CIE chromaticity coordinate values for the phosphor were x = 0.29 and y = 0.38. KCI Citation Count: 1
ISSN:1229-9162
2672-152X
DOI:10.36410/jcpr.2019.20.5.460