Decay dynamics of interchain excited states in luminescent conjugated polymer CN-PPV

We report the investigation of CN-PPV in poor solution. The fluorescence sp ectrum and the accompanying redshifted absorption spectrum suggest that the polymer forms interchain state in poor solution. As the concentration incr eases, the intrachain emission becomes weaker, while the interchain species emission becomes stronger. The fluorescence of CN-PPV film exhibits simila r behavior to that in concentrated poor solution. A two-state model is prop osed to describe fluorescence dynamics of polymers in films and solution. ( C) 2001 Elsevier Science B.V. All rights reserved.