Monte Carlo study of picosecond exciton relaxation and dissociation in poly(phenylenevinylene)

We present a Monte Carlo study of the relaxation and dissociation dynamics of optical excitations in poly(p-phenylenevinylene). The quantitative comparison with experimental data gives a complete picture of the excitation dynamics, the relevant parameters of the spectral relaxation, and the trapping processes involved, Our simulations are extended to include the primary step of the dissociation of a neutral photoexcitation in an electric field, The comparison with the results of held-induced photoluminescence quenching experiments enables us to understand the dissociation dynamics and to determine the exciton binding energy to 0.3+/-0.1 eV.