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Time‐resolved spectroscopy of exciton‐related states in single crystals and single crystalline films of Lu 3 Al 5 O 12 and Lu 3 Al 5 O 12 :Ce
Author(s) -
Babin V.,
Bichevin V.,
Gorbenko V.,
Kink M.,
Makhov A.,
Maksimov Yu.,
Nikl M.,
Stryganyuk G.,
Zazubovich S.,
Zorenko Yu.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201046486
Subject(s) - exciton , luminescence , spectroscopy , materials science , absorption spectroscopy , excitation , absorption (acoustics) , atomic physics , range (aeronautics) , scintillation , single crystal , doping , analytical chemistry (journal) , molecular physics , crystallography , chemistry , condensed matter physics , physics , optics , optoelectronics , chromatography , quantum mechanics , detector , composite material
Time‐resolved excitation spectra were measured at the same conditions at 10 K in the 4–20 eV energy range for the luminescence of self‐trapped and various localized excitons as well as of Ce 3+ ‐, Pb 2+ ‐, and Bi 3+ ‐related centers in single crystals and single crystalline films of Lu 3 Al 5 O 12 garnet. The decay kinetics of the intrinsic 4.9 and 3.65 eV luminescence of Lu 3 Al 5 O 12 crystals were studied at 4.2–300 K in the 10 −9 –10 −3 s time range. The origin and structure of the exciton states as well as the luminescence, energy transfer, and recombination processes, taking place under excitation in the exciton absorption region, were discussed. The influence of various defects on the scintillation characteristics of Ce 3+ ‐ and Pr 3+ ‐doped Lu 3 Al 5 O 12 crystals was considered.