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Issue 3, 2013
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Contrasting behaviour of the co-activators in the luminescence spectra of Y2O2S:Tb3+,Er3+ nanometre sized particles under UV and red light excitation

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Abstract

Nanometre sized particles of terbium and erbium co-doped yttrium oxysulfide up-converting phosphors were prepared by a urea homogeneous-precipitation method. Results from X-ray powder diffraction (XRPD), scanning electron microscopy (SEM) and photoluminescence spectroscopy studies on the microstructure and luminescent properties of the materials are reported. Upconversion emission was observed from the Er3+ cations when particles were excited with laser light of 632.8 nm wavelength. Under these conditions no interactions between the Er3+ cations and the Tb3+ cations were observed. In contrast there was evidence from the Stokes emission of the Er3+ cations under 254 nm excitation for an interaction between the Er3+ and Tb3+ cations reducing intensity of the latter's blue and green emission bands by cross relaxation processes.

Graphical abstract: Contrasting behaviour of the co-activators in the luminescence spectra of Y2O2S:Tb3+,Er3+ nanometre sized particles under UV and red light excitation

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Article information


Submitted
30 Oct 2012
Accepted
26 Nov 2012
First published
03 Dec 2012

Nanoscale, 2013,5, 1091-1096
Article type
Paper

Contrasting behaviour of the co-activators in the luminescence spectra of Y2O2S:Tb3+,Er3+ nanometre sized particles under UV and red light excitation

X. Yan, G. R. Fern, R. Withnall and J. Silver, Nanoscale, 2013, 5, 1091
DOI: 10.1039/C2NR33391K

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