Search

A Monte Carlo model of carrier separation and recombination in nanostructured organic photovoltaic (OPV) devices which takes into account all electrostatic interactions, energetic disorder, and polaronic effects is presented. The model predicts that an idealized interdigitated morphology could double the carrier collection efficiency achieved in a blend and also suggests that the maximum power output is extremely sensitive both to the geminate recombination rate across the heterojunction and to carrier mobility.

Both alloy composition and avalanche region width have significant effects on the temperature dependence of breakdown voltage. Monte Carlo simulations show that alloy scattering reduces the temperature dependence of breakdown voltage, the effect is too small to account for the observations.

Monte Carlo method is used for predicting the effect of composition, domain size and energetic disorder upon the mobility of carriers in an organic donor-acceptor blend. The impact of nonuniform mobility upon space-charge-limited diode and bulk heterojunction photovoltaic (PV) device performance is analyzed by using drift-diffusion model.

Monte Carlo simulation is used to simulate the avalanche process in a multiplication region, which incorporates a heterojunction, intended to introduce localization into the ionization process and reduce excess avalanche noise. The results are compared with those of models where the ionization path length distribution is represented by an exponential decay, displaced from the origin by a ballistic dead space.