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: email@example.com
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
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