Effect of doping a CdS/ZnSe/ZnSSe quantum-well heterostructure on luminescence and optical gain spectra

We report a theoretical study of the effect of donor doping of a CdS/ZnSe/ZnSSe quantum-well heterostructure on optical gain and luminescence spectra. It is shown that doping leads to a decrease in the threshold pump level at which optical gain arises, and reduces the short-wavelength shift of the luminescence line with increasing pump level, which is inherent in heterostructures with type-II band offsets.