Influence of Exciting-Light Intensity on the Concentration Dependence of Organic Molecules Luminescence in Glassy Matrices*

Triplet-level population distributions of organic molecules in glassy matrices were studied by computer simulation for various exciting-light intensities and compound concentrations. The dependence of the triplet-level population distribution on these variables was found. A consequence of the established relationship was that the exciting-light intensity affected the concentration dependence of the luminescence intensity where the population change of the molecular ground state resulting from their transition into the triplet state could not be neglected.