Nanoscale Charge Transport in Realistic Organic Thin-Films: Beyond Variable-Range Hopping and Percolation Networks

We are building up experimental and computational model systems for charge transport in nanoscale organic electronic devices. In particular, our combined approach is aimed at addressing questions as to the effect of impurities, traps, and other defects on electronic conductivity. Experimentally, we have designed thin films and monolayers to which we can controllably add known quantities of defects with known electronic properties. In tandem, we focus on a new Monte Carlo style simulation of charge transport in these imperfect devices with an aim to move beyond simple variable-range hopping models. Our goal is to establish all parameters for our simulations from first-principles calculations and detailed experimental results. I will describe initial results and comparisons with other organic electronic materials and existing charge transport models.