Influence of the Sc cation substituent on the structural properties and energy transfer processes in GAGG:Ce crystals

Dmitry Spassky; Nina Kozlova; Evgeniia Zabelina; Valentina Kasimova; Nataliya Krutyak; Alisa Ukhanova; Vladimir A. Morozov; Anatolii V. Morozov; Oleg Buzanov; Kirill Chernenko; Sergey Omelkov; Vitali Nagirnyi

doi:10.1039/D0CE00122H

Influence of the Sc cation substituent on the structural properties and energy transfer processes in GAGG:Ce crystals†

Dmitry Spassky,

*^a Nina Kozlova,

^b Evgeniia Zabelina,

^b Valentina Kasimova,^b Nataliya Krutyak,^c Alisa Ukhanova,^c Vladimir A. Morozov,^d Anatolii V. Morozov,^e Oleg Buzanov,^f Kirill Chernenko,^g Sergey Omelkov^h and Vitali Nagirnyi^h

Author affiliations

* Corresponding authors

^a Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Leninskie Gory 1(2), Moscow, Russia
E-mail: daspassky@gmail.com

^b National University of Science and Technology MISiS, Leninsky Prospekt 4, Moscow, Russia

^c Physics Department, M.V. Lomonosov Moscow State University, Leninskie Gory 1(2), Moscow, Russia

^d Chemistry Department, M.V. Lomonosov Moscow State University, Leninskie Gory 1(2), Moscow, Russia

^e Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow, Russia

^f Fomos-Materials, Buzheninova 16, Moscow, Russia

^g MAX IV Laboratory, Lund University, PO BOX 118, SE-221 00 Lund, Sweden

^h Institute of Physics, University of Tartu, W. Ostwald str. 1, 50411 Tartu, Estonia

Abstract

The influence of the Sc cation substituent on the structural and luminescence properties of GAGG:Ce crystals was studied. Unit cell parameters and space groups were obtained using XRD analysis. The chemical compositions of the crystals were determined using SEM-EDX and TEM-EDX techniques. Structures were refined by the Rietveld method and the distribution of Al/Ga/Sc cations between octahedral and tetrahedral sites was obtained. The influence of Sc on the electronic band structure and the energy of the 4f and 5d Ce³⁺ levels is shown. The modification of the band structure induced by the Sc electronic states results in the suppression of Gd emission and enhancement of Ce³⁺ emission at low temperatures. The Ce³⁺ emission decay is accelerated under high-energy excitation of the Sc-containing GAGG compound.

CrystEngComm

Influence of the Sc cation substituent on the structural properties and energy transfer processes in GAGG:Ce crystals†

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Influence of the Sc cation substituent on the structural properties and energy transfer processes in GAGG:Ce crystals

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