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

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.

SUBMITTER: Klonkowski AM 

PROVIDER: S-EPMC9078973 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature

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Up-conversion white emission and other luminescence properties of a YAG:Yb<sub>2</sub>O<sub>3</sub>·Tm<sub>2</sub>O<sub>3</sub>·Ho<sub>2</sub>O<sub>3</sub>@SiO<sub>2</sub> glass-nanocomposite.

Kłonkowski Andrzej M AM   Kukliński Benedykt B   Kubus Mariusz M   Ryl Jacek J   Szczodrowski Karol K   Wileńska Dorota D   Meyer H-Jürgen HJ  

RSC advances 20180320 20

We report on a glass-nanocomposite material consisting of yttrium aluminum garnet (Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>, YAG) nanocrystals co-doped with Yb<sup>3+</sup>, Tm<sup>3+</sup> and Ho<sup>3+</sup> ions as well as entrapped into a SiO<sub>2</sub> xerogel. This 94YAG·5Yb<sub>2</sub>O<sub>3</sub>·0.8Tm<sub>2</sub>O<sub>3</sub>·0.2Ho<sub>2</sub>O<sub>3</sub>@SiO<sub>2</sub> (abbr. YAG:YbTmHo@SiO<sub>2</sub>) nanocomposite material has been prepared by sol-gel procedure. Its structure a  ...[more]

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