Abstract: The mechanism of photocarrier generation and transport in conjugated polymer is studied. After analyzing thermalization of polaronexcitons which were formed through relaxation by dissociation electronhole pairs produced by photoexcitation initially. We infer that polarons along the polymer chains recombine rapidly and polarons between chains generate photocurrent. After investigating the transport mechanism of chargecarrier in conjugated polymer, a formula of conductivity of copolymers can be derived from chargecarriers generation and transport model (see Eq(6)), the calculated values agree with experimental data very well (see Table 2). We conclude that the conductance and photoluminescence in conjugated polymer could be attributed to polaron hopping between chains.

Key words: Photogenerated charge-carrier, Thermalizatoin, Polaron between chains