Decay kinetics of the delayed annihilation fluorescence of aromatic molecules in Langmuir-Blodgett films

Triplet states of aromatic molecules of the anthracene type in Langmuir-Blodgett films are investigated. It is established that the principal channel for the relaxation of T ₁ states is bimolecular triplet-triplet annihilation. The observed nonexponential decay kinetics of delayed annihilation fluorescence is discussed within the formal-kinetic and percolation models. Fiz. Tverd. Tela (St. Petersburg) 41, 736–739 (April 1999)