METHOD OF MANUFACTURING ORGANIC SEMICONDUCTOR THIN FILM AND MONOCRYSTALLINE ORGANIC SEMICONDUCTOR THIN FILM

摘要

The first object of the present invention is to provide a method for manufacturing a uniform organic semiconductor thin film consisting of single organic molecule with extremely few pinholes and of which both quality and thickness are uniform when the organic semiconductor thin film is manufactured by printing process. The second object of the present invention is to manufacture a monocrystalline organic semiconductor of which almost the entire region consists of a single monocrystal, by printing process. The uniform organic semiconductor thin film is manufactured by steps of: preparing a first ink obtained by dissolving a high concentration of the organic semiconductor in an organic solvent with high affinity for the organic semiconductor, and a second ink consisting of an organic solvent having a low affinity for the organic semiconductor; mixing the first and second inks on a substrate by simultaneously or alternately discharging the first and second inks from each ink head. Furthermore, a shape on which a seed crystal is generated with highly efficiency in one portion of a region storing the ink and a monocrystal is grown over the almost entire region storing the ink from the shape as a starting point.