Dimensionality of photogenerated charges transport in the organic phototransistor

Abstract

The charge photogeneration phenomenon in organic semiconducting materials gains great interest due to its application in organic solar cells or photosensitive devices. Here we report the temporal evolution of the photogenerated charge in organic field-effect transistors. Since the charge transfer can be ruled by the drift or diffusion processes, the gate-voltage dependence is used to distinguish the driving force.