Patent ID: 7871855

Claim:
A method for preparing an organic thin-film transistor, comprising preparing a semiconductor layer between source and drain electrodes of the organic thin-film transistor using an axial substituted phthalocyanine compound, wherein the center ligand of said axial substituted phthalocyanine compound is an atom with 3 valences or higher, and the axial ligands are chlorine, fluorine, or oxygen, which can be connected with the center ligand of axial substituted phthalocyanine compounds; wherein said axial substituted phthalocyanine compound is selected from the group consisting of indium fluorine phthalocyanine, ferrum chlorine phthalocyanine, indium chlorine phthalocyanine, gallium chlorine phthalocyanine, manganese chlorine phthalocyanine, indium chlorine hexadecafluoro phthalocyanine, indium chlorine hexadecachloro phthalocyanine, manganese chlorine hexadecafluoro phthalocyanine, aluminium chlorine hexadecafluoro phthalocyanine and aluminium chlorine hexadecachloro phthalocyanine.