Counter ion effects on the energy transfer processes in PPV

The emission was partially linearly polarized for PTHT-DBS and PPV-DBS cast films excited with linearly polarized excitation, but showed no polarization when excitation was performed with circularly polarized excitation. The spectral mass center (λSMC), the degree of polarization (P) and the relative emission efficiency (ηrel) depend on DBS concentration. Also worth noting is that the effects are much less significant for the PPV-DBS film converted at 200 °C.184