Method for increasing mobility of an organic thin film transistor by application of an electric field

A method for increasing mobility of an organic thin film transistor by application of an electric field, comprising the steps of:

• fabricating the organic thin film transistor comprising a gate electrode, a gate insulating layer, an organic semiconductor layer, and source/drain electrodes laminated on a substrate;
• and
• applying a direct current voltage between the source and drain electrodes and applying an alternating current voltage to the gate electrode, wherein the alternating current voltage applied to the gate electrode has a waveform and wherein the waveform is a square wave or a pulse wave, and wherein the direct current voltage applied between the source and drain electrodes has an intensity between − 10 V and −100 V, wherein the alternating current voltage applied to the gate electrode has an intensity of from 0.1 V to 10 V, and a frequency of from 10 Hz to 1 MHZ, and wherein the application of the voltages is performed for one minute to one hour.