Abstract
Charge carrier recombination kinetics in polymer crystals is investigated in the framework of a model of one-dimensional diffusion-like charge carrier motion in confined chains with absorbing or reflecting ends. The averaged survival probability for a pair of photogenerated charge carriers is calculated. A crossover from the t −1 2 behavior describing the recombination kinetics in an infinite ideal chain to an exponential-type dependence ∝ exp(−τ 1 3 ) , τ = 10 π 2c 2Wt (W is the diffusion rate, c is the defect concentration), is predicted. The results obtained are compared with the observed decay of transient photocurrent and photoinduced absorption in polyacetylene crystals.
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