The Radiationless Transfer of Energy of Electronic Excitation between Impurity Molecules in Crystals

The theory of transfer of electronic excitation energy between impurity molecules is developed without employing perturbation theory. The role of the lattice vibrations in the transfer process of the electronic excitation energy is taken into account. It is shown that the transfer time of electronic dipole excitation is proportional to the distance between molecules raised to the third power rather than to the sixth as it follows from the first‐order perturbation theory. A connection of parameters determining the transfer process of electronic excitation with the spectra of impurity absorption and luminescence is found.