MATEC Web Conf.
Volume 88, 20172016 International Conference on Biomaterials, Nanomaterials and Composite Materials (CBNCM 2016)
|Number of page(s)||7|
|Section||Chapter 1: Processing and Manufacturing Technologies of Materials|
|Published online||09 December 2016|
Luminescent Characteristics of Blue Phosphor CaAl2Si2O8:Eu2+ in White LED Applications by Solid State Method
Department of LED Convergence Engineering, Pukyong National University, 48547, Busan, Republic of Korea
a Corresponding author: firstname.lastname@example.org
Using the solid state reaction method, we synthesize the Ca0.88Al2Si2O8:Eu2+0.12 phosphor powders at different sintering temperatures ranging from 1100 to 1500 °C. From X-Ray diffraction patterns, we confirmed that all the samples acquired mixed CaAl2Si2O8 (triclinic), CaAlO4 (Monoclinic) and SiO8 (Hexagonal) phases. For the Ca0.88Al2Si2O8:Eu2+0.12 phosphors, the excitation spectra exhibited an unresolved broad band in the range from 200 to 420 nm and maximum intensity at 350 nm. The emission spectra of CaAl2Si2O8:Eu2+ show broad band ranging from 400 to 560 nm and maximum wavelength is found to be at around 440nm, which can be ascribed to the electric-dipole-allowed 4f65d1 - 8S7/2(4f7) transition of the Eu2+ ions. The Commission International De I-Eclairage 1931 (CIE 1931) chromaticity coordinates for Ca0.88Al2Si2O8:Eu2+0.12 phosphors are calculated and represented at (0.168, 0.144).
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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