Molecular theory of geminate recombination. V. Recombination of polarons on the 2-D square lattice

A molecular theory of geminate recombination of charge carriers, previously developed, is generalized to study the recombination of polarons. The theory predicts recombination behavior in qualitative agreement with experimental data, and this behavior is governed over the entire range of field by molecular parameters. It is shown that the dissociation pathways available to the carrier depend strongly on its initial site. It is also demonstrated that the observed dissociation probabilities result from competition between rates for various processes along the dissociation pathway, and the effects of this competition on the field and temperature dependence of the dissociation probability are examined.