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.

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