Free and bound exciton luminescence of ZnP2 –D48

Abstract

Thin structure of polarized absorption spectra of indirect transitions with phonon emission in the ZnP2 crystals is investigated. In the luminescence spectra, radiation of phonons at annihilation of free excitons simultaneously with radiation of excitons bound on axial centre is found. A model of optic recombination transitions of the axial centre is proposed.