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Photoluminescent Properties of (La1-xYx)(0.94)Tb0.06PO4 Phosphor Powders Prepared by Ultrasonic Spray Pyrolysis

Authors
Kwon, Y.Lee, J. K.Kim, S. -J.Nahm, S.Park, K.
Issue Date
Oct-2008
Publisher
AMER SCIENTIFIC PUBLISHERS
Keywords
(La,Y)PO4; Phosphor; Tb3+; Ultrasonic Spray Pyrolysis; Excitation; Emission
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.8, no.10, pp 5499 - 5502
Pages
4
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume
8
Number
10
Start Page
5499
End Page
5502
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/122592
DOI
10.1166/jnn.2008.1211
ISSN
1533-4880
1533-4899
Abstract
The calculated crystallite sizes of (La1-x,Y-x)(0.94)Tb0.06PO4 (0 <= x <= 1.0) phosphors ranged from 37-39 nm. Annealed (La1-xYx)(0.94)Tb0.06PO4 (0 <= x <= 1.0) phosphors showed a smooth, regular, and spherical morphology. Strong excitation peaks were appeared at 226 and 270 nm for all the phosphors. These were caused by the crystal splitting of D-7 and D-9 of 4f(7)5d(1) configuration in Tb3+, respectively. The characteristic emission peaks were observed at 489, 543, 585, and 621 nm, which were caused by the D-5(4)-F-7(j) (j = 6-3) transitions of Tb3+, respectively. The emission intensity at 543 nm increased with an increase in Y content up to 0.5 and then decreased for a higher Y content.
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