Specific features of dissipation of electronic excitation energy in coupled molecular solid systems based on silicon nanocrystals on intense optical pumping

A phenomenological model of transfer and dissipation of electronic excitation energy in the case of intense optical pumping of coupled systems based on arrays of silicon nanocrystals is developed. The calculated dependences of the relative concentrations of donors of energy and acceptors of energy on the intensity of optical pumping are compared with the experimental data on photoluminescence of structures containing silicon nanocrystals surrounded by oxygen molecules and erbium ions. From the comparison between the calculated and experimental dependences, the parameter of coupling of excitons in the silicon nanocrystals with the surrounding acceptors of energy is estimated