Unique characteristics such as quenching of photoluminescence and impr
ovement of photovoltaic effect were observed in donor polymer-acceptor
polymer composites, PAT6-CNPPV system and PDPATPSi-CNPPV system. Elec
tronic energy structures of these polymers were determined and these c
haracteristics are interpreted in terms of photoinduced charge transfe
r between donor polymer (PAT6 and PDPATPSi) and acceptor polymer (CNPP
V) and formation of fractal network.