PHOTOLUMINESCENCE OF CALCIUM THIOGALLATE ACTIVATED BY TRIVALENT PRASEODYMIUM IONS IN THE TEMPERATURE RANGE 10–300 K
Abstract
The photoluminescence (PL) of the chalcogenide semiconductor compound CaGa2S4:Pr3+ was studied in the temperature range 10–300 K under nanosecond pulsed laser excitation at 456 nm. The PL spectrum consists of a number of intense lines at 494, 631, 654 and 741 nm, formed by electronic transitions in praseodymium ions from 3P0 to 3H4, 3H6, 3F2 and 3F4 levels, respectively. It was found that the rise in the concentration of praseodymium ions in CaGa2S4:Pr3+ from 3 to 7 at. % resulted in a double increase of the PL intensity. Temperature quenching only by 50 and 75 % of the PL intensity of CaGa2S4:Pr3+ with 7 and 3 at. % Pr3+ ions concentration, respectively, was obtained in the range 10–300 K. It is shown that at 10 K the decay time constants of the most intense lines of the PL are between 3.9–4.8 μs. The decrease of the PL decay time constants by less than 0.1 μs with increasing the temperature up to 300 K and the appearance of a fast component with a duration constant of about 2.15–1.1 μs in the temperature range 220–300 K were obtained.
About the Authors
M. S. LEANENIA
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
E. V. LUTSENKO
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
M. V. RZHEUTSKI
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
V. N. PAVLOVSKII
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
G. P. YABLONSKII
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
T. G. NAGHIYEV
Institute of Physics of NAS of Azerbaijan, Baku
Azerbaijan
Azerbaijan
B. G. TAGIEV
Institute of Physics of NAS of Azerbaijan, Baku
Azerbaijan
Azerbaijan
S. A. ABUSHEV
Institute of Physics of NAS of Azerbaijan, Baku
Azerbaijan
Azerbaijan
O. B. TAGIEV
M. V. Lomonosov department of MSU in Baku, Baku
Azerbaijan
Azerbaijan
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