Patent ID: 8222633

Claim:
An organic transistor comprising: an organic semiconductor layer containing a thiazolothiazole derivative having a structural unit represented by the following Formula 1 and an insulating organic material having a band gap of 3 eV or more or no portion having four pairs or more of double bonds and single bonds continuously connected: wherein x, y, and y are a ratio of structural units, x is a real number with 0<x≦1, y is a real number with 0≦y<1, z is a real number with 0≦z<1, and x+y+z=1, n is an integer in the range of 10 to 1,000, Ar and Ar′ are the same as or different from each other, and are independently a bivalent cyclic or non-cyclic hydrocarbon group having a conjugated structure, or a bivalent heterocyclic group having a conjugated structure, A and B are the same as or different from each other, and are independently an aromatic group (Ar″), a bivalent heterocyclic group having a conjugated structure, or an acyclic group as follows: wherein R′ and R″ are the same as or different from each other, and may be independently a hydrogen atom; a halogen atom; a linear, branched, or cyclic alkyl group; a linear, branched, or cyclic alkoxy group; a thioalkoxy group; a nitrile group; a nitro group; an amino group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, and a dotted line is a portion linked to a main chain of Formula 1, the aromatic group (Ar″) is selected from groups that are represented by the following Formulae: wherein X is an O, S, Se, NR 3 , SiR 3 R 4 , or CR 3 R 4 group, and R 3 and R 4 are the same as or different from each other, are independently a hydrogen atom; a linear, branched, or cyclic alkyl group; or an aryl group, and may be bonded to each other to form a ring, R 1 and R 2 are the same as or different from each other, and are independently a hydrogen atom, a hydroxyl group, a halogen atom, a nitrile group, a nitro group, an ester group, an ether group, an amino group, an imide group, a silane group, a thioester group, a substituted or unsubstituted and linear, branched, or cyclic alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted and linear, branched, or cyclic alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted and linear, branched, or cyclic thioalkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, two or more carbon atoms which are contained in R 1 and/or R 2 and are not adjacent to each other may be linked by O, S, NH, —NRO—, SiR 0 R 00 —, —CO—, —COO—, —OCO—, —OCOO—, —S—CO—, —CO—S—, —CH═CH—, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, R 0 and R 00 are the same as or different from each other, and are independently hydrogen, an aryl group, or an alkyl group having 1 to 12 carbon atoms, and R 1 and R 2 may be bonded to each other to form a ring.