Blue and orange emission from Ce3+ and Yb2+ doped KNa3Al4Si4O16 phosphor: A detailed study of the luminescence mechanism
- Authors
- Unithrattil, Sanjith; Im, Won Bin
- Issue Date
- Jan-2015
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Solid-state lighting; Photoluminescence; Rietveld refinement; Blue emission; Orange emission
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.618, pp.718 - 723
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 618
- Start Page
- 718
- End Page
- 723
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158050
- DOI
- 10.1016/j.jallcom.2014.09.001
- ISSN
- 0925-8388
- Abstract
- Blue and orange-emitting, KNa3-xSi4Al4O16:xCe(3+) and KNa3-ySi4Al4O16:yYb(2+) were synthesized through solid-state reaction. Analyses of structural properties of the phosphors were performed through Rietveld refinement of the XRD pattern, and the luminescence properties were analyzed by activation with Ce3+ and Yb2+ ions. On excitation with 397 nm source, photoluminescence (PL) spectra Ce3+ activated compound was found to be a typical blue asymmetric emission band originating from 5d(1) -> 4f(1)(F-2(7/2) and F-2(5/2)) transitions of Ce3+ ions. On exciting with 442 nm source, Yb2+ activated samples showed an orange broad emission band, due to transitions in the 4f(13)5d(1) and 4f(14) levels. The temperature dependence of PL was analyzed for both phosphors, and Yb2+ doped compound showed a rapid thermal quenching of luminescence, compared to Ce3+ doped compound, as is expected for higher stokes shift emission bands.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 신소재공학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158050)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.