White luminescence in Dy3+ doped BiOCl phosphors and their Judd-Ofelt analysis

Shivakumara, C and Saraf, Rohit and Halappa, Pramod (2016) White luminescence in Dy3+ doped BiOCl phosphors and their Judd-Ofelt analysis. In: DYES AND PIGMENTS, 126 . pp. 154-164.

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Abstract

White-light emitting Dy3+ doped layered BiOCl phosphors were synthesized by the solid state route and their structure was confirmed by the Rietveld refinement method. On substitution of Dy3+ ion to Bi3+-site in BiOCl, the photoluminescence spectra exhibit blue (F-4(9/2) -> H-6(15/2)), yellow (F-4(9/2) -> H-6(13/2)) and red (F-4(9/2) -> H-6(11/2)) emissions which function together to generate white light. It was found that the emission intensity increases up to 9 mol% of Dy3+ and then quenched due to dipole-dipole interaction. Judd-Ofelt theory and radiative properties suggest that the present phosphors have a long lifetime, high quantum efficiency, excellent color purity and better stimulated emission cross-section compared to reported Dy3+ doped compounds. The obtained color chromaticity results are close to the National Television System Committee standard and clearly establish the bright prospects of these phosphors in white luminescence. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	DYES AND PIGMENTS
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copy right for this article belongs to the Copy right for this article belongs to the
Keywords:	BiOCl; Trivalent dysprosium ion; Phosphors; Judd-Ofelt analysis; Color chromaticity; Photoluminescence
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	02 Apr 2016 11:01
Last Modified:	02 Apr 2016 11:01
URI:	http://eprints.iisc.ac.in/id/eprint/53454

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