Luminescence distribution of Yb-doped Ca-a-SiAlON phosphors

Dierrre, B., Yuan, X. L., Hirosaki, N., Kimura, T., Xie, R-J. and Sekiguchi, T. (2008) Luminescence distribution of Yb-doped Ca-a-SiAlON phosphors. Journal of Materials Research, 23 6: 1701-1705. doi:10.1557/JMR.2008.0208

Author Dierrre, B.
Yuan, X. L.
Hirosaki, N.
Kimura, T.
Xie, R-J.
Sekiguchi, T.
Title Luminescence distribution of Yb-doped Ca-a-SiAlON phosphors
Journal name Journal of Materials Research   Check publisher's open access policy
ISSN 0884-2914
Publication date 2008
Sub-type Article (original research)
DOI 10.1557/JMR.2008.0208
Volume 23
Issue 6
Start page 1701
End page 1705
Total pages 5
Place of publication Warrendale, PA, U.S.
Publisher Materials Research Society
Language eng
Subject 291400 Materials Engineering
Abstract Luminescence properties of Yb-doped Ca-a-SiAlON phosphors with composition of Ca1-xYbxSi12-(m+n)Alm+nOnN16-n were investigated by using cathodoluminescence (CL). The ratio of Yb to Ca was kept constant while the host lattice was changed by replacing m+n(Si–N) bonds with m(Al–N) and n(Al–O) bonds. The luminescence of these phosphors consists of three peaks in the ultraviolet (UV), green (VIS), and infrared (IR) regions, which are attributed to the emissions from secondary phases, Yb2+ and Yb3+, respectively. The UV emission depends on the Si/Al ratio: the UV peak is centered at 310 nm for the Si-rich mix and at 360 nm for the Al-rich mix. We have found that Yb exists in the divalent state in a-SiAlON and in the trivalent state in the secondary phases
Keyword Cathodoluminescence (CL)
UV detection
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Excellence in Research Australia (ERA) - Collection
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Created: Wed, 13 Jan 2010, 14:57:44 EST by Rosalind Blair on behalf of Sustainable Minerals Institute