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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
- 10월-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
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 8
- Number
- 10
- Start Page
- 5499
- End Page
- 5502
- ISSN
- 1533-4880
- 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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