Mechanism and fluorescence spectra of PVK thin film doped perylene

The fluorescence spectra of Poly(N-vinylcarbazole) doped perylene are measured. Their fluorescence spectra are basically agreement with emission spectra of perylene and their light-emitting intensities are enhanced ten times or more than that of pure perylene. This shows that the emission mainly come from perylene, and it exists an efficient energy transfer or charge transfer process occurring between PVK and perylene, it is found that energy transfer from PVK to perylene is not agreement with experiment. On the basis of the PL process of PVK/perylene thin films, the charge transfer from (PVK~+) to (perylene~+) and from (PVK~-) to (perylene~-) is not occurred, merely according to the excited and radiation processes of perylene, the change of the fluorescence spectra of PVK doped perylene can be explained satisfactorily.