Semiconductor insulator interface, carrier trapping

Only recently it has been discovered that electronic states at the dielectric interface substantially determine the charge carrier transport in organic field-effect transistors. Pentacene is a prominent example where the unique p-type behavior of pentacene based OFETs has been attributed to the organic semiconductor alone and where the influence of electronic interface states at the pentacene/insulator surface has been overseen. The reason for this was the belief that organic semiconductors are unable to form dangling bonds at the interface, which are the main cause for interface states in inorganic semiconductors. However, there are other forms of interface states which can act as efficient charge carrier traps. 

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