Photoluminescence decay dynamics of dendritically substituted conjugated polymers

We report subnanosecond photoluminescence (PL) decay dynamics of dendron decorated poly(phenylene vinylenes) (PPVs) in solutions and as neat films. Previous PL studies revealed that two conformations of the polymer, with distinct luminescence quantum yields and PL, are responsible for the photophysics of these polymers. These conformations are characteristic of isolated and aggregated chains. From the decay dynamics, energy transfer between the two species is evident and repopulation of exciton states occurs in aggregated regions of the sample.