Catch and recombination of carriers in semiconductor quantum points CdSe/ZnSe

The extended in time photoluminescence spectra of the CdSe/ZnSe self-organized quantum dots are measured. The samples excitation was accomplished on the account of the femtosecond and nanosecond high-power laser pulses absorption in the barrier layers. The peculiarities of the quantum dots and barrier luminescence kinetics are explained through the effective diffusion and catch of the carriers from the barrier into the quantum dots, fast relaxation by the dimensional quantization energy by the sublevels, through the time dependence of the carriers catch and recombination on the quantum dot dimension. The registered change in the form of the luminescence spectra of the quantum dots samples (the increase in the luminescence intensity of the high-frequency spectra part) and the nonlinear dependence of the luminescence by the high excitation levels are explained through the states saturation and/or through the decrease in the carriers catch into the quantum dot in the course of its filling by the carriers