Luminescence of Ce3+-sensitized and Dy3+-activated aluminoborates, M3Al6B8O24 (M = Ca, Ba)

Kutty, TRN (1990) Luminescence of Ce3+-sensitized and Dy3+-activated aluminoborates, M3Al6B8O24 (M = Ca, Ba). In: Materials Research Bulletin, 25 (4). pp. 485-493.

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Abstract

The near white emission of $Dy^3^+$ is remarkably sensitized by $Ce^3^+$ when present together in the recently reported aluminoborates, $M_3Al_6B_8O_2_4$ $(M = Ca, Ba)$. Energy transfer from $Ce^3^+$ to $Dy^3^+$ at 300K has been examined. The multiplicity of the $Ce^3^+$ excitation band of $Ce^3^+ + Dy^3^+$ containing phosphors and its concentration dependance point to the prevalence of rare earth $(RE^3^+)$ ion pairs. More efficient energy migration to $Dy^3^+$ takes place from $Ce^3^+ - Ce^3^+$ pair than from isolated $Ce^3^+$ . The results indicate the role of borate group in the interaction between $RE^3^+$ ions.

Item Type:	Journal Article
Publication:	Materials Research Bulletin
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	calcium;aluminium;borates;phosphors;dysprosium
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	28 Jun 2007
Last Modified:	17 Jan 2012 09:45
URI:	http://eprints.iisc.ac.in/id/eprint/11309

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