Charge transfer and relaxation dynamics of excited electronic states in organic photoreceptor materials with and without

Abstract

Photoelectron spectroscopy from different photoreceptor materials which are in contact with C60 demonstrates that a possible improvement in terms of charge-generation efficiency strongly depends on the specific materials: whereas for different metal-phthalocyanines (M-Pc) and polyvinylcarbazol (PVK) C60 has a strong potential for improvement, no such improvement is expected from energetic reasons for 1,4-Dithioketo-3,6-diphenyl-pyrrolo-[3,4-c]-pyrrol (DTPP). Time-resolved 2-photon photoemission experiments using femto-second laser pulses give insight into the dynamics of the photoexcited electronic states.