Funct. Mater. 2015; 22 (4): 434-439.
Luminescent properties of LaI3-Ce microcrystals embedded in NaI host
[1] Ukraine Academy of Printing, 19 Pidgolosko Str., 79020 Lviv, Ukraine
[2] I.Franko National University of Lviv, 8 Kyryla i Mefodiya Str., 79005 Lviv, Ukraine
[3] Lviv Polytechnic National University, 12 S.Bandery Str., 79000 Lviv, Ukraine
[4] Institute for Scintillation Materials, STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine
Luminescence-kinetic properties of LaI3-Ce microcrystals of 1-10 μm size in NaI-LaI3-Ce system are studied upon 2.5-12 eV excitation using synchrotron radiation. The luminescent properties of cerium centers in the embedded LaI3-Ce microcrystals are revealed to be similar to those for the bulk LaI3-Ce crystals. The mechanisms of cerium centers luminescence excitation in the NaI-LaI3-Ce crystalline system upon excitation in the transparency and fundamental absorption range of NaI and LaI3 matrixes and mechanisms of thermal quenching of cerium ions luminescence in the LaI3 microcrystals are discussed.
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