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Vol. 34 No. 11 (2022): Vol 34 Issue 11, 2022

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Near White Emitting Host Sensitized Dy3+ doped GdPO4 Nanoparticles: Luminescence Studies

https://doi.org/10.14233/ajchem.2022.23940
Elizabeth Chingangbam
Department of Chemistry, Manipur University, Canchipur-795003, India ; Department of Chemistry, D.M. College of Science, Dhanamanjuri University, Imphal-795001, India
N. Yaiphaba
Department of Chemistry, D.M. College of Science, Dhanamanjuri University, Imphal-795001, India
Ganngam Phaomei
Department of Chemistry and CoENSTds, Berhampur University, Berhampur-760007, India

Corresponding Author(s) : N. Yaiphaba

ningombam.y@gmail.com

Asian Journal of Chemistry, Vol. 34 No. 11 (2022): Vol 34 Issue 11, 2022

Abstract

Host sensitized GdPO4 nanoparticles doped with Dy3+ ions have been prepared by co-precipitation method with ethylene glycol as capping agent as well as solvent. The as-prepared samples exhibit crystalline monoclinic phase of GdPO4. From the luminescence study, 4F9/2→6H15/2 of Dy3+ is dominant over 4F9/2→6H13/2 transition indicating the occupation of inversion symmetry by Dy3+ ions in the host lattice. The steady state luminescence shows effective energy transfer from gadolinium (Gd3+) to dysprosium (Dy3+) ions in the doped samples with optimum emission of Dy3+ (2 at.%) doped sample. Decay lifetime values also decrease upon increasing Dy3+ ion concentration on account of cross-relaxation concentration quenching effect. The emission colour of single phase as-prepared Dy3+ doped GdPO4 nanoparticles can be tuned from blue-violet to near white light by changing the excitation wavelength. Tunability of the light and white light emission are supported by Commission Internationale de l’Eclairage (CIE) chromaticity.

Keywords

Co-precipitation Monoclinic Luminescence Inversion symmetry Energy transfer
Chingangbam, E., Yaiphaba, N., & Phaomei, G. (2022). Near White Emitting Host Sensitized Dy3+ doped GdPO4 Nanoparticles: Luminescence Studies. Asian Journal of Chemistry, 34(11), 2969–2974. https://doi.org/10.14233/ajchem.2022.23940
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