Abstract

A model of the kinetics of attenuation of heteroannihilation delayed fluorescence and sensitized phosphorescence of impurity organic molecular crystals is proposed. It is shown that this model makes it possible to evaluate the contribution of various mechanisms to the transformation of the energy of triplet excitations in systems when the intrinsic lifetime of nonlocalized triplet excitons of the base is much shorter than the lifetime of localized excitons.

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