EXCITON RECOMBINATION MECHANISM AND BINDING-ENERGIES IN MOCVD-GROWN ZN1-XCDXSE-ZNSE SINGLE QUANTUM-WELLS

We report here on the study of the optical properties of ZnCdSe-ZnSe q uantum structures elaborated by metalorganic chemical vapour depositio n (MOCVD). The band structure is experimentally investigated by means of photoluminescence and photoreflectance. We have computed the excito n binding energies for heavy- and light-hole excitons in the context o f a self-consistent two-parameter trial function. As a complement, we study the temperature dependence of the photoluminescence intensity un der both direct and indirect photoexcitation in graded-index separate confinement heterostructures based on these materials.