Patent ID: 7595093

Claim:
A method for preparing a condensed polycyclic aromatic compound thin film, the method comprising: dissolving at a temperature of 60° C. to 250° C. a condensed polycyclic aromatic compound in a solvent containing an organic compound having a higher vapor pressure than that of the condensed polycyclic aromatic compound to form a solution; spreading the solution having a temperature of 60° C. to 250° C. over a base having a temperature of 60° C. to 230° C.; and removing the organic compound and the solvent from the solution spread over the base while maintaining a supersaturating state to form a condensed polycyclic aromatic compound thin film having the condensed polycyclic aromatic compound, wherein the content of the organic compound in the solution is 30 mass % to 99.9 mass %.