Publikace detail

Upconversion photoluminiscence of nanocrystalline rare-earth ion doped Yb3Ga5O12 (RE = Er3 , Ho3 )

Autoři: Netolický Tomáš | Wágner Tomáš | Střižík Lukáš | Melánová Klára | Šlang Stanislav

Rok: 2021

Druh publikace: ostatní - článek ve sborníku

Název zdroje: SSC2021 : Book of abstract

Název nakladatele: Trenčianska univerzita Alexandra Dubčeka v Trenčíne

Místo vydání: Trenčín

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Upconversion photoluminiscence of nanocrystalline rare-earth ion doped Yb3Ga5O12 (RE = Er3 , Ho3 )	Nanocrystalline oxide of composition Yb3Ga5O12 belongs to the family of materials with garnet-related structure. Variability of structural sites and cation sizes allows easy doping of materials with garnet structure with rare-earth and/or transition metal ions. Yb3Ga5O12 is a promising material with potential applications in the field of photonics when doped by lanthanides such as Er3+. High ratio of Yb3+ to Er3+ content leads to dominant red upconversion emission at the expense of green emission. One aim of this work is the synthesis of this material with various Er3+ concentration by sol-gel combustion route using citric acid as chelating agent. Phase composition and morphology of annealed products are examined by X-ray diffraction and by scanning electron microscopy. The next aim is focused on optical properties of prepared nanocrystalline powders. Diffuse reflectance spectroscopy is used for determination of absorption bands associated with the presence of Er3+ and Yb3+. Absorption bands of Yb3+ around 980 nm are then used for energy transfer to Er3+. This leads to the visible upconversion emission provided by photoluminescence spectroscopy.

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