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Synthesis and photoluminescence characteristics of (Y,Gd)BO 3 :RE (RE = Eu 3+ , Ce 3+ , Dy 3+ and Tb 3+ ) phosphors for blue chip and near‐UV white LEDs
Author(s) -
Rangari V. V.,
Singh V.,
Dhoble S. J.
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2933
Subject(s) - phosphor , photoluminescence , radiochemistry , gadolinium , chemistry , analytical chemistry (journal) , physics , nuclear physics , chromatography , organic chemistry , optics
Abstract A series of Eu 3+ ‐, Ce 3+ ‐, Dy 3+ ‐ and Tb 3+ ‐doped (Y,Gd)BO 3 phosphors was synthesized by a solid‐state diffusion method. X‐Ray diffraction confirmed their hexagonal structure and the scanning electron microscopy results showed crystalline particles. The excitation spectra revealed that (Y,Gd)BO 3 phosphors doped with Eu 3+ , Ce 3+ , Dy 3+ and Tb 3+ are effectively excited with near UV‐light of 395 nm/blue light, 364, 351 and 314 nm, respectively. Photoluminescence spectra of Eu 3+ ‐, Ce 3+ ‐ and Tb 3+ /Dy 3+ ‐doped phosphor showed intense emission of reddish orange, blue and white light, respectively. The phosphor Y 0.60 Gd 0.38 BO 3 :Ce 0.02 showed CIE 1931 color coordinates of (0.158, 0.031) and better color purity compared with commercially available blue BAM:Eu 2+ phosphor. The phosphor (Y,Gd)BO 3 doped with Eu 3+ , Dy 3+ and Tb 3+ showed CIE 1931 color coordinates of (0.667, 0.332), (0.251, 0.299) and (0.333, 0.391) respectively. Significant photoluminescence characteristics of the prepared phosphors indicate that they might serve as potential candidates for blue chip and near‐UV white light‐emitting diode applications. Copyright © 2015 John Wiley & Sons, Ltd.