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http://dx.doi.org/10.6117/kmeps.2016.23.4.063

Preparation and Photoluminescent Properties of Ca2PO4Cl Activated by Divalent Europium  

Park, In Yong (Department of Materials Science and Engineering, Hanbat National University)
Publication Information
Journal of the Microelectronics and Packaging Society / v.23, no.4, 2016 , pp. 63-67 More about this Journal
Abstract
Divalent europium-activated $Ca_2PO_4Cl$ phosphor powders were prepared by a chemical synthetic method followed by heat treatment in reduced atmosphere, and the crystal structures, morphologies and photoluminescence properties of the powders were investigated by x-ray powder diffraction, scanning electron microscope and spectrometer. The effect of Ca/P mole ratio at the starting materials on the final products was evaluated. The optimized synthesis condition obtained in this study was Ca/P mole ratio of 2.0. The present phosphor materials had higher photoluminescence intensity and better color purity than the commercial blue phosphor powders, $(Ca,Ba,Sr)_{10}(PO_4)_6Cl_2:Eu^{2+}$. The result of excitation spectrum measurement indicated that the excitation efficiency of the synthesized powders was higher for the long-wavelength UV region than that of the commercial phosphor. It was thus concluded that the samples prepared in this study can be successfully applied for the light-emitting devices such as LED excited with long-wavelength UV light sources.
Keywords
$Ca_2PO_4Cl:Eu^{2+}$; phosphor; photoluminescence; apatite; excitation;
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Times Cited By KSCI : 2  (Citation Analysis)
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