Fused ring compounds useful in organic thin-film transistors

A material for an organic thin film transistor comprising the compound for an organic thin film transistor according to claim 1.

An organic thin film transistor comprising:na substrate andthree terminals of a gate electrode, a source electrode and a drain electrode, an insulator layer and an organic semiconductor layer being provided on the substrate,source-drain current being controllable by applying a voltage to the gate electrode,the organic semiconductor layer comprising the compound for an organic thin film transistor according to claim 1.

The organic thin film transistor according to claim 5 which is capable of emitting light by utilizing current flowing between the source electrode and the drain electrode and the light emission is controllable by applying a voltage to the gate electrode.

The organic thin film transistor according to claim 5 which further comprises a buffer layer between the source and drain electrodes and the organic semiconductor layer.

The fused ring compound according to claim 10, wherein R20 and R21 of formula (4) are independently an alkyl group having 1 to 30 carbon atoms.

The fused ring compound according to claim 10, wherein R20 and R21 of formula (4) are independently an phenyl group which has an alkyl group having 3 to 12 carbon atoms as a substituent.

A fused ring compound according to claim 10, wherein R20 and R21 are independently a halogen atom, an alkyl group having 1 to 30 carbon atoms, a haloalkyl group having 1 to 30 carbon atoms, an alkoxyl group having 2 to 30 carbon atoms, a haloalkoxyl group having 1 to 30 carbon atoms, an alkylthio group having 1 to 30 carbon atoms, a haloalkylthio group having 1 to 30 carbon atoms, an alkylamino group having 1 to 30 carbon atoms, a dialkylamino group having 2 to 60 carbon atoms, in which the alkyl groups are optionally combined with each other to form a ring structure containing the nitrogen atom, an alkylsulfonyl group having 1 to 30 carbon atoms, a haloalkylsulfonyl group having 1 to 30 carbon atoms, an aromatic heterocyclic group having 3 to 60 carbon atoms, an alkylsilyl group having 3 to 20 carbon atoms, an alkylsilylacetylene group having 5 to 60 carbon atoms or a cyano group, each of which optionally having a substituent.

An organic compound according to claim 16, wherein R30 and R31 are independently a halogen atom, an alkyl group having 1 to 30 carbon atoms, a haloalkyl group having 1 to 30 carbon atoms, an alkoxyl group having 1 to 30 carbon atoms, a haloalkoxyl group having 1 to 30 carbon atoms, an alkylthio group having 1 to 30 carbon atoms, a haloalkylthio group having 1 to 30 carbon atoms, an alkylamino group having 1 to 30 carbon atoms, a dialkylamino group having 2 to 60 carbon atoms, in which the alkyl groups are optionally combined with each other to form a ring structure containing the nitrogen atom, an alkylsulfonyl group having 1 to 30 carbon atoms, a haloalkylsulfonyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 60 carbon atoms, an aromatic heterocyclic group having 3 to 60 carbon atoms, an alkylsilyl group having 3 to 20 carbon atoms, an alkylsilylacetylene group having 5 to 60 carbon atoms or a cyano group, each of which optionally having a substituent.