Luminescence of Eu2+ in calcium thiogallate

Paul Benalloul (1) , Carlos Barthou (1) , Claude Fouassier (2) , Anatoly N. Georgobiani (3) , Leonid S. Lepnev (3) , Yusuf N. Emirov (3) , Alex N. Gruzintsev (4) , Bakhadur G. Tagiev (5) , Oktay B. Tagiev (5) , Rasim B. Jabbarov (5)

1 LOS - Laboratoire d'optique des solides
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 LPI RAS - P. N. Lebedev Physical Institute of the Russian Academy of Sciences [Moscow]
4 Institute of Microelectronics Technology
5 Institute of Physics of Azerbaijan

Luminescence, decay, and thermal quenching under photonic excitation of CaGa2S4:Eu2+ mono and polycrystals have been measured. For excitation into the lower 5d states, thermal quenching starts above 350 K, which makes this material appropriate for use as a yellow phosphor under excitation by blue-emitting diodes. Thermoluminescence after 337.1 nm irradiation is explained by photoionization of Eu2+ ions.

Mots clés: calcium compounds; europium; photoluminescence; ternary semiconductors; radiative lifetimes; phosphors; radiation quenching; photoionisation; thermoluminescence; spectral line intensity

Domaines: Matériaux

Paul Benalloul, Carlos Barthou, Claude Fouassier, Anatoly N. Georgobiani, Leonid S. Lepnev, et al.. Luminescence of Eu2+ in calcium thiogallate. Journal of The Electrochemical Society, 2003, 150 (1), pp.G62-G65. ⟨10.1149/1.1528945⟩. ⟨hal-00005472⟩