Abstract
Lateral geometry devices are useful structures to probe the charge transport properties of organic bulk heterojunction materials. In this work, we describe the lateral device as effectively having three distinct zones: two photogenerative space-charge regions next to each electrode and a middle zone that has high recombination rate. We analyze how photocurrent depends on electron and hole mobilities and recombination strength and, based on this analysis, demonstrate a steady-state method for extracting both carrier mobilities and the recombination coefficient from potentiometry and photocurrent data.
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