Time-resolved spectroscopic study of the photoluminescence response to femtosecond pulse excitation and free carrier absorption at different wavelengths, thermally stimulated luminescence measurements and investigation of differential absorption are applied to amend the available data on excitation transfer in GAGG:Ce scintillators, and an electronic energy-level diagram in this single crystal is suggested to explain the influence of codoping with divalent Mg on luminescence kinetics and light yield. The conclusions are generalized by comparison of the influence of aliovalent doping in garnets (GAGG:Ce) and oxyorthosilicates (LSO:Ce and YSO:Ce). In both cases, the codoping facilitates the energy transfer to radiative Ce3+ centers, while the light yield is increased in the LYSO:Ce system but reduced in GAGG:Ce.

Auffray, E., Augulis, R., Fedorov, A., Dosovitskiy, G., Grigorjeva, L., Gulbinas, V., et al. (2018). Excitation Transfer Engineering in Ce-Doped Oxide Crystalline Scintillators by Codoping with Alkali-Earth Ions. PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE, 215(7) [10.1002/pssa.201700798].

Excitation Transfer Engineering in Ce-Doped Oxide Crystalline Scintillators by Codoping with Alkali-Earth Ions

Lucchini M.;
2018

Abstract

Time-resolved spectroscopic study of the photoluminescence response to femtosecond pulse excitation and free carrier absorption at different wavelengths, thermally stimulated luminescence measurements and investigation of differential absorption are applied to amend the available data on excitation transfer in GAGG:Ce scintillators, and an electronic energy-level diagram in this single crystal is suggested to explain the influence of codoping with divalent Mg on luminescence kinetics and light yield. The conclusions are generalized by comparison of the influence of aliovalent doping in garnets (GAGG:Ce) and oxyorthosilicates (LSO:Ce and YSO:Ce). In both cases, the codoping facilitates the energy transfer to radiative Ce3+ centers, while the light yield is increased in the LYSO:Ce system but reduced in GAGG:Ce.
Articolo in rivista - Articolo scientifico
excitation transfer; free carriers; multicomponent garnets; scintillators;
English
2018
215
7
1700798
none
Auffray, E., Augulis, R., Fedorov, A., Dosovitskiy, G., Grigorjeva, L., Gulbinas, V., et al. (2018). Excitation Transfer Engineering in Ce-Doped Oxide Crystalline Scintillators by Codoping with Alkali-Earth Ions. PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE, 215(7) [10.1002/pssa.201700798].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/423131
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