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Epitaxial growth of single-crystalline-film scintillators based on Tb3+-doped and Tb3+–Ce3+-codoped Gd1–xLuxAlO3 (x = 0–1) mixed perovskites

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Abstract

The paper is dedicated to the development of scintillating screens for microimaging applications based on the single crystalline films (SCFs) of singly Tb3+ and doubly Tb3+–Ce3+ doped Gd1–xLuxAlO3 (x = 0–1) mixed perovskites grown onto YAlO3 (YAP) substrates using the liquid phase epitaxy (LPE) method. The cation engineering in Gd1–xLuxAlO3 (x = 0–1) solid solution enabled an improvement of the K-edge of X-ray absorption of SCF scintillators in the 50–63 keV energy range. The structural quality of the grown films was studied using X-ray diffraction and scanning electron microscopy. The optical properties of the Tb3+-doped and Tb3+–Ce3+-codoped Gd1–xLuxAlO3 (x = 0–1) SCFs were investigated by conventional spectroscopic methods, such as absorption, cathodoluminescence (CL), photoluminescence, the light yield of CL, and radioluminescence (RL) measurements under e-beam and α-particle excitation, respectively. Effective Gd3+ → Tb3+ and Gd3+ → Ce3+ → Tb3+ energy transfer processes were observed in Gd1–xLuxAlO3:Tb and Gd1–xLuxAlO3:Tb,Ce SCFs, respectively, explaining the increased efficiency of the Tb3+ luminescence in these perovskite hosts. We found that the highest efficiencies in terms of CL and RL were observed in the doubly Tb3+–Ce3+-doped Gd0.5Lu0.5AlO3 SCFs.

Graphical abstract: Epitaxial growth of single-crystalline-film scintillators based on Tb3+-doped and Tb3+–Ce3+-codoped Gd1–xLuxAlO3 (x = 0–1) mixed perovskites

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Publication details

The article was received on 05 Nov 2018, accepted on 30 Jan 2019 and first published on 30 Jan 2019


Article type: Paper
DOI: 10.1039/C8CE01889H
Citation: CrystEngComm, 2019, Advance Article

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    Epitaxial growth of single-crystalline-film scintillators based on Tb3+-doped and Tb3+–Ce3+-codoped Gd1–xLuxAlO3 (x = 0–1) mixed perovskites

    V. Gorbenko, T. Zorenko, K. Paprocki, F. Riva, P. A. Douissard, T. Martin and Yu. Zorenko, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C8CE01889H

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