Ghosh, Debarati and Biswas, K and Balaji, S and Annapurna, K (2017) Tunable white light generation from Ce3+-Tb3+-Mn2+ doped metaphosphate glass for LED and solar cell applications. Journal of Luminescence, 183. pp. 143-149. ISSN 0022-2313

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Abstract

Alkali free Ba-Al metaphosphate glasses doped with Ce, Tb and Mn are prepared and their concentration is tuned to achieve white light emission for production of LEDs and luminescent concentrator for Si-PV applications. The occurrence of a redox reaction among dopant ions (Ce4+, Tb3+ -> Ce3+, Tb4+) is observed from the absorption spectra while there is no change in oxidation state of Mn2+ ions. This is confirmed from ESR studies. Emission spectra indicated effective downshifting of radiation from near visible to green and red region of the spectrum. On tuning the concentration of Tb3+ and Mn2+, bright white light emission (CIE coordinates: x=3.32, y=3.33) corresponding to CCT of 5900 K is obtained. This white light produced has been further tuned to different hues by varying the excitation wavelength of this triply doped glass. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Article
Subjects:	Glass
Divisions:	Glass
Depositing User:	Bidhan Chaudhuri
Date Deposited:	24 Jan 2018 07:30
Last Modified:	24 Jan 2018 07:30
URI:	http://cgcri.csircentral.net/id/eprint/4027

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