Mixtures of organic molecules with donor and acceptor character are of paramount importance for the development of electronic and optoelectronic devices. When such organic films are contacted with metallic electrodes, charge transfer between the electrode and the organic active material affects considerably their physical and chemical properties. In particular, charge transfer from the substrate can potentially hinder intermolecular charge transfer, as seems to be the case in previous works. In this talk I will describe experimental and theoretical investigations demonstrating that intermolecular charge-transfer can still take place at metal/organic interfaces provided that the electron affinity of the acceptor is large enough and the ionization potential of the donor remains low. Moreover, we will show that the stoichimetric flexibility achieved for donor/acceptor mixtures on solid surfaces enables an extremely accurate method to control the charge state of the electroactive species.

Electronic effects in the self-assembly of strong donor/acceptor mixtures on metal surfaces

253rd National Meeting (2017)

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