Structural and luminescent properties of Eu3+ doped multi-principal component Ce0.2Gd0.2Hf0.2La0.2Zr0.2O2 nanoparticles

Anandkumar, Mariappan and Bagul, Pratik Mahendra and Deshpande, Atul Suresh (2020) Structural and luminescent properties of Eu3+ doped multi-principal component Ce0.2Gd0.2Hf0.2La0.2Zr0.2O2 nanoparticles. Journal of Alloys and Compounds, 838 (155595). ISSN 09258388

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Abstract

We report the luminescent properties and local structural studies of multi-principal component Ce0.2Gd0.2Hf0.2La0.2Zr0.2O2 oxide nanoparticles using Eu3+ as a luminescent dopant. A simple chemical co-precipitation of metal salts accompanied by peptization in an acidic medium was carried out to obtain various compositions of Eu3+-doped Ce0.2Gd0.2Hf0.2La0.2Zr0.2O2 nanoparticle sols. The sols were dried in an oven at 110 °C for 24 h, and the resultant powder was calcined in static air for 2 h at 500 °C, 750 °C, and 1000 °C. The calcined nanoparticles were characterized by using x-ray diffraction (XRD), UV–Visible spectroscopy (UV–Vis), and Photoluminescence spectroscopy (PL). All the calcined Eu3+-doped samples revealed a single-phase cubic fluorite solid solution without any phase separation. PL studies on various concentrations of Eu3+ doping and calcination temperatures have been evaluated. The Eu3+ emission features are excitation wavelength-dependent. In addition, PL emission intensity increased with increasing Eu3+ concentration and calcination temperatures. The luminescent properties of these multi-principal component oxides were associated with its local environment based on the location of Eu3+ inside the host lattice. The asymmetric ratios calculated from the emission spectrum provided an insight into the local environment around the Eu3+ ion and confirmed that the system contains disordered defects even when heat treated at higher temperatures showing a stable defect fluorite structure. The reported Eu3+ doped Ce0.2Gd0.2Hf0.2La0.2Zr0.2O2 nanoparticles will be a suitable candidate for imaging as well as in lighting applications.

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IITH Creators:

IITH Creators	ORCiD
Anandkumar, Mariappan	UNSPECIFIED
Bagul, Pratik Mahendra	UNSPECIFIED
Deshpande, Atul Suresh	0000-0003-0874-9502

Item Type:

Article

Uncontrolled Keywords:

Calcination; Cerium compounds; Defects; Emission spectroscopy; Fluorspar; Gadolinium compounds; Hafnium compounds; Lanthanum compounds; Luminescence; Metal nanoparticles; Phase separation; Photoluminescence spectroscopy; Precipitation (chemical); Sols; Zirconium compounds

Subjects:

Others > Metallurgy
Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

12 Jul 2021 07:08

Last Modified:

12 Jul 2021 07:08

URI:

http://raiithold.iith.ac.in/id/eprint/8238