Photon cascade luminescence in CaAl{sub 12}O{sub 19}:Pr, Cr

In this report, the Cr{sup 3+} ion was chosen as a co-dopant to modify the unpractical photon cascade emission properties of Pr{sup 3+}-doped CaAl{sub 12}O{sub 19} phosphors, which emit one near-UV photon from the {sup 1}S{sub 0} state followed by visible photons from the {sup 3}P{sub 0} state, into...

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Bibliographic Details
Published in:	Journal of solid state chemistry Vol. 180; no. 10
Main Authors:	Nie, Z.G., Graduate School of Chinese Academy of Sciences, Beijing 100039, Zhang, J.H., Zhang, X., Lue, S.Z., Ren, X.G., Zhang, G.B., Wang, X.J., Department of Physics, Georgia Southern University, Statesboro, GA 30460
Format:	Journal Article
Language:	English
Published:	United States 15-10-2007
Subjects:	ALUMINIUM COMPOUNDS CALCIUM COMPOUNDS CHROMIUM IONS CURIUM COMPOUNDS DOPED MATERIALS ENERGY TRANSFER EXCITATION FAR ULTRAVIOLET RADIATION INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY LUMINESCENCE PHOSPHORS PHOTONS PRASEODYMIUM COMPOUNDS PRASEODYMIUM IONS QUANTUM EFFICIENCY SPECTRA SYNCHROTRON RADIATION
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Summary:	In this report, the Cr{sup 3+} ion was chosen as a co-dopant to modify the unpractical photon cascade emission properties of Pr{sup 3+}-doped CaAl{sub 12}O{sub 19} phosphors, which emit one near-UV photon from the {sup 1}S{sub 0} state followed by visible photons from the {sup 3}P{sub 0} state, into phosphors that emits two visible photons through energy transfer. The photon cascade emission process via energy transfer and the transfer mechanisms were systemically investigated by luminescence spectra and dynamics using synchrotron radiation as one of the excitation sources. The internal visible quantum efficiency of CaAl{sub 12}O{sub 19}:Pr, Cr was estimated and compared with CaAl{sub 12}O{sub 19}:Pr and the drawback to obtain the visible quantum efficiency higher than unit for CaAl{sub 12}O{sub 19}:Pr, Cr as a practical VUV phosphor was also discussed. - Graphical abstract: The Cr{sup 3+} ion was chosen as a co-dopant to modify the photon cascade emission properties of CaAl{sub 12}O{sub 19}: Pr via energy transfer. The cascade emission process and the energy transfer mechanisms were systemically investigated. The drawback for CaAl{sub 12}O{sub 19}: Pr, Cr as a practical VUV phosphor was also discussed.
ISSN:	0022-4596 1095-726X
DOI:	10.1016/j.jssc.2007.08.024