In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 299-300 ( 2011-7), p. 612-615
Abstract:
(Gd 1-x ,Dy x ) 2 O 2 SO 4 phosphors were synthesized by a homogeneous precipitation method from commercially available Gd 2 O 3 , Dy 2 O 3 , H 2 SO 4 and Urea ((NH 2 ) 2 CO) starting materials. XRD analysis shows that the amorphous precursor can be transformed into pure Gd 2 O 2 SO 4 phase by calcining at 900 °C for 2 h in air. Photoluminescence (PL) spectroscopy reveals that the strongest and second emission peaks are located at 575 nm and 485 nm under 277 nm UV light excitation, which corresponds to the 4 F 9/2 → 6 H 13/2 and the 4 F 9/2 → 6 H 15/2 transitions of Dy 3+ ions, and both transitions of Dy 3 + ions have a single exponential decay behavior. The quenching concentration of Dy 3+ ions is 1 mol%. The CIE chromaticity coordinate and the color temperature of (Gd 0.99 ,Dy 0.01 ) 2 O 2 SO 4 phosphor are (0.306, 0.379, 0.315)and 6546 K, respectively.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.299-300
DOI:
10.4028/www.scientific.net/AMR.299-300.612
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2011
detail.hit.zdb_id:
2265002-7
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