Relaxation paths of charge transfer excitons

Relaxation dynamics of the charge transfer (CT) excitons in molecular solid s is considered with respect to a competitive channel of the charge carrier photogeneration. Examples of the ultrafast charge separation from the nonr elaxed low-energy CT states in molecular crystals and in polymers are prese nted, providing a basis to assume that such a carrier photogeneration mecha nism is a general feature of molecular systems with low-energy CT states. ( C) 2000 Elsevier Science B.V. All rights reserved.