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http://dx.doi.org/10.6117/kmeps.2019.26.4.083

Preparation and Photoluminescence Properties of LiBaPO4:Eu2+ Phosphors by Solid State Reaction Method  

Park, In Yong (Department of Materials Science and Engineering, Hanbat National University)
Publication Information
Journal of the Microelectronics and Packaging Society / v.26, no.4, 2019 , pp. 83-88 More about this Journal
Abstract
LiBaPO4:Eu2+ phosphors with stoichiometric and nonstoichiometric compositions were prepared using a solid state reaction followed by heat treatment in reduced atmosphere, and the crystal structures and photoluminescence(PL) properties of the powders were investigated by x-ray powder diffraction and luminescence spectrometer. At 900℃, the Ba3(PO4)2 phase as the intermediate phase was observed with the LiBaPO4 phase as the main crystalline phase. Samples with a low europium concentration at 1,000℃ belonged to the trigonal structure, whereas samples with Eu2+ content more than 4 mol% showed monoclinic structure. In the nonstoichiometric compositions of 4 mol% Eu2+ and above, a single phase of Eu2+-doped LiBaPO4, showing bluish green emission, was formed.
Keywords
$LiBaPO_4:Eu^{2+}$; Phosphor; Photoluminescence; Monoclinic; Trigonal;
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