In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 727 ( 2017-1), p. 612-617
Abstract:
The novel white light emitting phosphors Sr 3 Lu (1- x ) Dy x (PO 4 ) 3 ( x = 0.02, 0.04, 0.06, 0.08, 0.10) were synthesized via a conventional high-temperature solid-state reaction method at 1250°C. The excitation spectrum indicated that these phosphors had a strong absorption in near UV region in the range from 260 to 460 nm. And under 350 nm excitation, the blue emission at 483nm ( 4 F 9/2 → 6 H 15/2 ) and yellow emission at 576 nm ( 4 F 9/2 → 6 H 13/2 ) were observed in the phosphors, respectively. We studied the effect of different doping concentrations of Dy 3+ activator on the luminescence properties and found that the optimum doping concentration is 6 mol%. According to the Dexter’s theory, this quenching behavior is ascribed to be electric d-d interaction. Furthermore, the chromaticity coordinate ( x = 0.28, y = 0.32) of Sr 3 Lu (PO 4 ) 3 :0.06Dy 3+ phosphor was very close to the “ideal white” ( x = 0.33, y = 0.33) in the chromaticity diagram. Our results indicate that the Sr 3 Lu (PO 4 ) 3 :Dy 3+ phosphor can serve as a promising candidate for single-component white light emitting phosphor under near UV excitation.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.727
DOI:
10.4028/www.scientific.net/KEM.727.612
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2017
detail.hit.zdb_id:
2073306-9
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