The behaviour B - exciton n=1 series of the monoclinic diphosphide zinc in the electric field of Shottky barrier

Abstract

The Wannier - Mott excitons have been discovered in absorption spectra of β-ZnP2 crystals and examined in detail. Due to low symmetry of crystals and, also, crystal field splitting the Wannier - Mott excitons are observed as few series of electric dipole allowed and forbidden transitions. Moreover, the fine structure of hydrogen-like states with great oscillator strength placed near to the long wave side of the exciton spectrum appears inside ~20 nm wave range. The results of examinations of hydrogen-like states in the absorption edge of β-ZnP2 in the electric field of Shottky barrier are presented in the work. The research has been performed on ITO- β-ZnP2 using the spectral dependencies of photocurrent at the temperature 80K.