Issue 19, 2016

Effect of lithium substitution on the charge compensation, structural and luminescence properties of nanocrystalline Ca10(PO4)6F2 activated with Eu3+ ions

Abstract

Eu3+ and Li+ ion co-doped fluorapatite (Ca10(PO4)6F2) nanocrystals were fabricated using a microwave stimulated hydrothermal technique followed by heat treatment at 500 °C. The concentration of Eu3+ ions was set to be 1 mol% and that of the Li+ ions was in the range of 0.5–5 mol% to investigate the site occupancy preference and charge compensation co-doping. The structural and morphological properties of the obtained samples were determined by using XRD (X-ray powder diffraction) and TEM (transmission electron microscopy) techniques as well as IR (infrared) and micro-Raman spectroscopy. The particle size was verified and calculated by the Rietveld method being in the range of 70–95 nm. The luminescence properties (the emission, excitation spectra and emission kinetics) of the Eu3+ ion-doped fluorapatite depending on the co-dopant (Li+ ions) were recorded. Significantly, fluorescence quenching by OH groups was eliminated by F- ions and the luminescence intensity was enhanced by co-doping with Li+ ions. The simplified Judd–Ofelt (J–O) theory has been performed to explain a detailed analysis of the luminescence spectra.

Graphical abstract: Effect of lithium substitution on the charge compensation, structural and luminescence properties of nanocrystalline Ca10(PO4)6F2 activated with Eu3+ ions

Article information

Article type
Paper
Submitted
06 Feb 2016
Accepted
07 Apr 2016
First published
07 Apr 2016

CrystEngComm, 2016,18, 3447-3455

Effect of lithium substitution on the charge compensation, structural and luminescence properties of nanocrystalline Ca10(PO4)6F2 activated with Eu3+ ions

P. Sobierajska, R. Pazik, K. Zawisza, G. Renaudin, J. Nedelec and R. J. Wiglusz, CrystEngComm, 2016, 18, 3447 DOI: 10.1039/C6CE00320F

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