Abstract
Excitation spectra and temperature dependence measurements of the photoluminescence(PL) were carried out for the various kinds of the ZnTe–ZnSe superlattices (SLs) prepared by hot wall epitaxy. First observation of strong absorption band by about 0.2 eV above the PL emission band and observed activation energy (0.2 eV) of the thermal quenching which are independent of the SL structures suggest that the PL is related to the radiative recombinations between band edge and localized centers, i.e. Free-to-Bound transitions.