Full-color-emitting CaYAl3O7: Pr3+, Ce3+ phosphor for near-UV LED-based white light
- Authors
- Unithrattil, Sanjith; Lee, Kyoung Hwa; Chung, Woon Jin; Im, Won Bin
- Issue Date
- Aug-2014
- Publisher
- ELSEVIER
- Keywords
- Solid-state lighting; Photoluminescence; Full-color emission; Rietveld refinement; Maximum entropy method
- Citation
- JOURNAL OF LUMINESCENCE, v.152, pp.176 - 181
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF LUMINESCENCE
- Volume
- 152
- Start Page
- 176
- End Page
- 181
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/159320
- DOI
- 10.1016/j.jlumin.2013.11.039
- ISSN
- 0022-2313
- Abstract
- A full-color-emitting phosphor, CaYAl3O7:Pr3+,Ce3+ was synthesized through conventional solid-state reaction. The structural properties of the phosphor were analyzed by Rietveld refinement, maximum entropy method, and luminescent properties were analyzed by co-activating with different rare earth ions. Photoluminescence spectra on excitation with 450 nm source were dominated by green band at 490 nm originating from P-3(0)-> H-3(4) transition of Pr3+ ions and less intense band at 617 nm due to D-1(2)-> H-3(4) transition. On codoping with Ce3+, phosphor exhibits an additional broad band originating from 5d(1)-4f(1) (F-2(7/2) and F-2(5/2)) of Ce3+, centered at around 540 nm due to efficient energy transfer from Pr3+ levels to Ce3+ levels. With this emission property we recommend CaYAl3O7:Pr3+,Ce3+ as potential single-phase full-color-emitting phosphor for solid-state lighting applications.
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