Debnath, Radhaballabh and Nayak, A and Ghosh, A (2007) On the enhancement of luminescence efficiency of Y2O3 : Eu3+ red phosphor by incorporating (Al3+, B3+) in the host lattice. Chemical Physics Letters, 444 (4-6). pp. 324-327. ISSN 0009-2614

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Abstract

Incorporation of trace (Al3+, B3+) in Y2O3 lattice, causes an enhancement of efficiency of both D-5(0) -> F-7(2) luminescence of Eu3+ and its excitation in Y2O3:Eu3+ red phosphor. Enhancement of excitation remains restricted around the (Eu3+ - O2-) C-T band. The D-5(0) -> F-7(2) decay characteristics and the build-up time of the D-5(0) excited state of Eu3+ also change due to such incorporation, although the luminescence pattern remains unchanged. The result suggests a change in polarity of the host rather than the site symmetry of Eu3+ by the hetero-cations. Calculation of the Judd-Ofelt parameters of the D-5(0) -> F-7(2) transition of Eu3+ gives similar results.

Item Type:	Article
Subjects:	Processing Science
Divisions:	Glass
Depositing User:	Namita Dutta
Date Deposited:	23 Jan 2012 12:55
Last Modified:	05 Mar 2012 10:13
URI:	http://cgcri.csircentral.net/id/eprint/382

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