LOW-TEMPERATURE PHOTOLUMINESCENCE OF SINGLE-CRYSTAL ZNXCD1-XTE FILMS GROWN BY SOLID-PHASE SUBSTITUTION

A study was made of the influence of solid-phase substitutional reactions (SPSR), carried out under nonoptimal conditions, on the low-temperature photoluminescence spectra of a CdTe substrate and of ZnxCd1-xTe films grown on it. Such reactions in the substrate suppressed the luminescence bands associated with acceptor-hydrogen (A-H) complexes and gave rise to lines due to A-A complexes. Moreover, bands D due to dislocation-loop defects, appeared in the spectra of CdTe and of the ZnCdTe solid solution. The mechanism of recombination of an exciton at a D center in the solid solution was similar to the mechanism in cadmium telluride.