Synthesis, crystal structure and photoluminescence properties of new blue-green Ba sub(1-x)(PO sub(3)) sub(2):Eu sub(x) super(2+) (0 < x less than or equal to 0.040) phosphors for near ultraviolet based white light-emitting diodes

A series of new blue-green Ba sub(1-x)(PO sub(3)) sub(2):Eu sub(x) super(2+) (x= 0.005, 0.010, 0.020, 0.030, 0.035, 0.040) phosphors were synthesized by a solid-state reaction. The phase purities and crystal structures of the series were characterized by X-ray diffraction (XRD) and Rietveld refineme...

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Bibliographic Details
Published in:RSC advances 2015-05, Vol.5 (53), p.42714-42720
Main Authors: Wu, Zhan-Chao, Fu, Hong-Hong, Liu, Jie, Kuang, Shao-Ping, Wu, Ming-Mei, Xu, Jun-Gu, Kuang, Xiao-Jun
Format: Article
Language:English
Subjects:
Chromaticity
Crystal structure
Light-emitting diodes
Phosphors
Photoluminescence
Quenching
Thermal stability
Ultraviolet
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Summary:A series of new blue-green Ba sub(1-x)(PO sub(3)) sub(2):Eu sub(x) super(2+) (x= 0.005, 0.010, 0.020, 0.030, 0.035, 0.040) phosphors were synthesized by a solid-state reaction. The phase purities and crystal structures of the series were characterized by X-ray diffraction (XRD) and Rietveld refinements. Their photoluminescence properties were investigated by means of excitation, emission spectra and Commission International de L'Eclairage (CIE) chromaticity coordinates. The concentration quenching mechanism of Eu super(2+) emission in Ba(PO sub(3)) sub(2) hosts was studied. Thermal stability was evaluated by temperature-dependent luminescence of Ba sub(0.970)(PO sub(3)) sub(2):Eu sub(0.030) super(2+) phosphor. Moreover, the activation energy (E sub(a)) for thermal quenching was calculated. The photoluminescence of Ba sub(0.970)(PO sub(3)) sub(2):Eu sub(0.030) super(2+) phosphor shows higher thermal stability than that of the commercial blue phosphor BaMgAl sub(10)O sub(17):Eu super(2+) (BAM). All the results show that Ba(PO sub(3)) sub(2):Eu super(2+) phosphor is a potential blue-green phosphor for near ultraviolet-based white light-emitting diodes (WLED).
ISSN:2046-2069
DOI:10.1039/c5ra01755f