Organic–inorganic system of two-dimensional quantum wells prepared by the dye incorporation into sol–gel glass

Abstract

Molecules of the organic colorants were encapsulated in SiO 2 glass derived by the solution-gelatinization process; as the result, the colored glass was obtained containing the colorant embedded within the glass in a molecular or molecular aggregates form. The system thus prepared manifests an efficient photoluminescence; the optical absorption as well as the photoluminescence excitation and emission spectra reveal the existence of sets of the discrete energy levels. The structure of the colorant’s molecule and the percentage of doping determine the level separation; the dependence upon the environment is relatively small. The quantum mechanical description of the system is given considering the organic molecules as the two-dimensional quantum wells, with the boundary conditions taking account of the finite depth of the wells and the existence of aggregation. The results of calculations agree with the experiment.