Study of Carrier Dynamics in Poly (pyridopyrazine vinylene)using Picosecond Time-resolved Pump-Probe Spectroscopy
Seung Mook Lee and Bu Ku Rhee
We succeeded in polymerization of a n-type conjugated polymer, poly(pyridopyrazinevinylene). Its properties of nonlinear optical absorption and carrier dynamics of the excited states have been investigated by using picosecond time-resolved pump-probe spectroscopy. Optical bleaching and reverse saturable absorption were observed in the wavelength region above and below the bandgap, respectively. These results could be explained in terms of five-state model with three singlet and two triplet states.