Photoinduced charge transfer and charge carrier generation in polysilane films containing C60 molecules

We have studied charge carrier generation and transport in poly(methylphenylsilane) films containing C60 molecules, and have found that the quantum efficiency for carrier generation is increased by more than an order of magnitude over poly(methylphenylsilane) films not containing C60 and that hole transport is unaffected. We also measured the electroabsorption spectrum of the composite films and found no evidence for charge transfer transitions. We conclude that electrons are transferred from poly(methylphenylsilane) to C60 molecules that have been excited to their lowest energy absorption band at about 2 eV.