Free exciton and exciton-impurity complexes of monoclinic zinc diphosphide
Sobolev V. V., Kozlov A. I., Tychina I. I., Romanik P. A., Smolyarenko E. M.
The reflection spectra near Ε at 4.2, 80, and 293 К and the transmission and photoluminescence spectra at 4.2 К have been investigated for monoclinic ZnP2 crystals. The free-exciton states with η — 1, 2, 3, and 4 and exciton-impurity complexes have been observed for the first time. Their basic parameters are evaluated.