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Dy3+/Eu3+ co-doped CsGd(MoO4)(2) phosphor with tunable photoluminescence properties for near-UV WLEDs applications

Devakumar, Balaji and Halappa, Pramod and Shivakumara, C (2017) Dy3+/Eu3+ co-doped CsGd(MoO4)(2) phosphor with tunable photoluminescence properties for near-UV WLEDs applications. In: DYES AND PIGMENTS, 137 . pp. 244-255.

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Official URL: http://dx.doi.org/10.1016/j.dyepig.2016.10.016

Abstract

A series of color tunable Dy3+/Eu3+ co-doped CsGd(MoO4)(2)(CGM) phosphors were prepared by the conventional solid state reaction. The crystal structure, morphology, vibrational modes, luminescence properties and energy transfer mechanism were investigated. Upon near ultraviolet `(n-UV) excitation, Dy3+/Eu3+ co-doped phosphors exhibit the characteristics blue (F-4(9.2) -> H-6(15/2)), yellow (F-4(9.2) -> H-6(13/2)) and red (D-5(0) -> F-7(2)) emission corresponding to transitions of Dy3+and Eu3+ions. By changing the doping concentration of Dy3+ and Eu3+, the emission hue could be controlled via the energy transfer mechanism. The energy transfer efficiency and critical distance of Dy3+ and Eu3+ have been calculated. The calculated chromaticity coordinates and color correlated temperature of co-doped phosphors lie at the F-4 warm white points of standard illuminants. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 21 Jan 2017 08:42
Last Modified: 21 Jan 2017 08:42
URI: http://eprints.iisc.ac.in/id/eprint/55953

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