Effect of optical absorption edge on green luminescence spectrum of CdS crystals

The relationship between green luminescence and optical absorption spectra, as well as the dependence of the green luminescence spectrum shape on excitation intensity and temperature in 77-4.2 K range have been investigated in CdS crystals with various shallow donor densities. It has been shown that the increase in phonon satellite intensities with respect to that of the zero phonon band stems from the shift of the optical absorption edge towards long wavelengths due to the influence of ionized shallow donors on the conductanceband edge. Refs. 8, figs. 3