Up-conversion white emission and other luminescence properties of a YAG:Yb2O3·Tm2O3·Ho2O3@SiO2 glass-nanocomposite

Andrzej M. Kłonkowski; Benedykt Kukliński; Mariusz Kubus; Jacek Ryl; Karol Szczodrowski; Dorota Wileńska; H.-Jürgen Meyer

doi:10.1039/C8RA00118A

Up-conversion white emission and other luminescence properties of a YAG:Yb₂O₃·Tm₂O₃·Ho₂O₃@SiO₂ glass-nanocomposite†

Andrzej M. Kłonkowski,

*^a Benedykt Kukliński,^b Mariusz Kubus,^c Jacek Ryl,^d Karol Szczodrowski,

^b Dorota Wileńska^a and H.-Jürgen Meyer

Author affiliations

* Corresponding authors

^a Faculty of Chemistry, University of Gdańsk, Wita Stwosza, 80-308 Gdańsk, Poland
E-mail: andrzej.klonkowski@ug.edu.pl

^b Institute of Experimental Physics, University of Gdańsk, Wita Stwosza, 80-308 Gdańsk, Poland

^c Institute of Inorganic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany

^d Chemical Faculty, Gdańsk University of Technology, G. Narutowicza 11/12, 80-233 Gdańsk, Poland

Abstract

We report on a glass-nanocomposite material consisting of yttrium aluminum garnet (Y₃Al₅O₁₂, YAG) nanocrystals co-doped with Yb³⁺, Tm³⁺ and Ho³⁺ ions as well as entrapped into a SiO₂ xerogel. This 94YAG·5Yb₂O₃·0.8Tm₂O₃·0.2Ho₂O₃@SiO₂ (abbr. YAG:YbTmHo@SiO₂) nanocomposite material has been prepared by sol–gel procedure. Its structure and morphology has been characterized by means of X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques as well as energy dispersive X-ray (EDX), X-ray photoelectron (XPS) and luminescence spectroscopies. The luminescent glass-nanocomposite exhibited an up-conversion effect under λ_exc = 980 nm and emission when excited under 355 nm in steady-state conditions. Then time-resolved luminescence emission was observed, when the sample was excited at 290 and 355 nm by a pulse laser. Average decay times for the SiO₂ matrix and for some transitions of the Tm³⁺ and Ho³⁺ dopants present in the YAG:YbTmHo@SiO₂ material have been evaluated. The luminescent nanocomposite when excited under 290 or 355 nm wavelengths in both conditions emits blue light. However, the nanocomposite is promising as a single-source white-light phosphor owing to its up-conversion luminescence under 980 nm excitation. Such optical features make the studied material an alternative phosphor.

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Article information

DOI: https://doi.org/10.1039/C8RA00118A
Article type: Paper
Submitted: 05 Jan 2018
Accepted: 02 Mar 2018
First published: 20 Mar 2018
This article is Open Access

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RSC Adv., 2018,8, 11006-11013

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Up-conversion white emission and other luminescence properties of a YAG:Yb₂O₃·Tm₂O₃·Ho₂O₃@SiO₂ glass-nanocomposite

A. M. Kłonkowski, B. Kukliński, M. Kubus, J. Ryl, K. Szczodrowski, D. Wileńska and H.-Jürgen Meyer, RSC Adv., 2018, 8, 11006 DOI: 10.1039/C8RA00118A

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