Organic semiconductor transistor

1. An organic semiconductor transistor comprising:

a plurality of electrodes; and

an organic semiconductor layer containing at least one fluorene compound represented by the following formula (I):

wherein in the formula (I), R 1 represents an alkyl group having from 1 to 8 carbon atoms; R 2 and R 3 each independently represent an alkyl group having from 1 to 8 carbon atoms, or an alkoxy group having from 1 to 8 carbon atoms; and n represents an integer of from 1 to 3.

2. The organic semiconductor transistor according to claim 1 , wherein the plurality of electrodes include a source electrode, a drain electrode and a gate electrode,

the organic semiconductor transistor further comprises an insulating layer,

the gate electrode is disposed apart from both the source electrode and the drain electrode,

the organic semiconductor layer is disposed to be in contact with both the source electrode and the drain electrode,

the insulating layer is disposed to be interposed between the organic semiconductor layer and the gate electrode, and

the organic semiconductor transistor is a field effect transistor.

3. The organic semiconductor transistor according to claim 1 , wherein the plurality of electrodes include a source electrode, a drain electrode and a gate electrode,

the source electrode and the drain electrode are disposed to face each other,

the gate electrode is disposed apart from both the source electrode and the drain electrode,

the organic semiconductor layer is disposed to be in contact with the source electrode and the drain electrode, and

the organic semiconductor transistor is a static induction transistor.