Near-white-emitting phosphors based on tungstate for phosphor-converted light-emitting diodes

A series of barium tungstate (BaWO(4)) phosphors were synthesized by the solid state reaction method, and the systematic effect of Dy(3+)/Sr(2+) doping concentration on the structural and photoluminescence (PL) properties were investigated. X-ray diffraction studies confirm the structure of the phos...

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Bibliographic Details
Published in:Applied optics (2004) 2013-12, Vol.52 (35), p.8424-3
Main Authors: Ambast, A K, Kunti, A K, Som, S, Sharma, S K
Format: Article
Language:English
Subjects:
Diffraction
Emission
Emission spectra
Luminescence
Phosphors
Tungstates
White light
X-rays
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Summary:A series of barium tungstate (BaWO(4)) phosphors were synthesized by the solid state reaction method, and the systematic effect of Dy(3+)/Sr(2+) doping concentration on the structural and photoluminescence (PL) properties were investigated. X-ray diffraction studies confirm the structure of the phosphors as tetragonal with space group I4(1)/a. The PL emission spectra show two peaks in the blue and yellow regions which were tuned to produce near-white emission. The quality of the white light was checked by estimating CIE parameters. This indicates the suitability of barium-tungstate-based phosphors for near-white LED applications.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.52.008424