Time-resolved luminescence of ZnIn2S4 at low temperature

A detailed study of the time-resolved luminescence of ZnIn2S4 after pulsed-laser excitation at 30 K is presented. Results are given on the dependence of the emitted PL intensity at different emission wavelengths on the excitation intensity, on the time-resolved spectra in the range (0-10-1)s of delay time with respect to excitation and on the time decay of the luminescence intensity for different emission wavelengths. The results are discussed in the framework of a simple model for the recombination processes at low temperatures yielding a good overall agreement with the experimental data