Comparison of the Luminescent Properties of Y3Al5O12:Pr Crystals and Films
T. Zorenkoa,b, V. Gorbenkoa,b, S. Nizankovskiy c and Yu. Zorenkoa,b
aInstitute of Physics, Kazimierz Wielki University in Bydgoszcz, 85-090 Bydgoszcz, Poland
bElectronics Department, Ivan Franko National University of Lviv, 79017 Lviv, Ukraine
cInstitute for Single Crystals, National Academy of Sciences of Ukraine, 61001 Kharkiv, Ukraine
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The work is dedicated to comparative investigation of the luminescent properties of Y3Al5O12:Pr (YAG:Pr) single crystals and single crystalline films using excitation by synchrotron radiation with an energy of 3.7-25 eV in the exciton range of YAG host. We have found that the differences in the excitation spectra and luminescence decay kinetics of YAG:Pr crystals and films are caused by involving the YAl antisite defects and oxygen vacancies in the crystals and Pb2+ flux related dopants in the films in the excitation processes of the Pr3+ luminescence. Taking into account these differences, we have determined in more detail the energy structure of the Pr3+ ions in YAG host and estimated the differences in the energies of creation of the excitons bound with the isolated Pr3+ ions in YAG:Pr films and the dipole Pr-YAl antisite defect centers in the crystal counterpart.

DOI: 10.12693/APhysPolA.133.923
PACS numbers: 78.55.Hx