BOUND EXCITON LUMINESCENCE IN TE-DOPED SRS

This article describes the synthesis and characterization of SrS: Te p owders which were found to have two high energy emission bands under p hotoluminescent excitation. To understand the radiative recombination mechanism, photoluminescence emission spectra were measured as a funct ion of temperature. A simple configuration coordinate model was used t o explain the emission band broadening and luminescence quenching that was observed with increasing temperature. Luminescence decay measurem ents were also performed, and the empirically determined transition ra tes were compared to theoretical calculations. Finally, SrS: Te ACTFEL devices were fabricated and tested under electroluminescence excitati on. (C) 1998 American Institute of Physics. [S0021-8979(98)08619-8]