An organic Field-Effect Transistor with a charge transfer injection layer

摘要

Provided is a field-effect transistor (10) which comprises a metal or carbon source electrode (14) and a layer of a functional organic semiconductor (28). A region (18) of an injection material is provided which is in contact with both the source electrode (14) and layer of the functional organic semiconductor (28). This region (18) facilitates the transfer charge carriers between the electrode and semiconductor. The injection material is preferably an organic compound such as 3-hexylthiophene, polyarylamine, poly(3 ,4-ethylenedioxythiophene)-polystyrenesulphonic acid or polyaniline. In an embodiment the injection material is in the form of a column (48) extending through the layer of the organic semiconductor. A method of forming this embodiment where the gate electrode is on top and another method where the gate electrode is at the bottom.