The electronic processes causing the radioluminescence of organic molecular scintillators, i.e. single crystals, polycrystals, plastics, liquids, are discussed. Pure and binary systems were investigated. The analysis is based on the review of experimental results of radioluminescence intensity and pulse shape measurements, both well known and new, and on the modem theory of radioluminescence process in organic condensed media ([1]). Specific quenching of the radioluminescence, which appears in the cases of high density of excitation, is analysed for organic solids with different structure perfection.