Patent ID: 8012530

Claim:
A method of manufacturing an organic thin-film photoelectric conversion element, comprising: creating a buffer layer and a photoelectric conversion layer on a substrate having an electrode under normal atmosphere; providing a hole-blocking TiO2 layer on the photoelectric conversion layer by wet process without heating; and providing an opposite electrode on the hole-blocking TiO2 layer, wherein the photoelectric conversion layer is provided with a concentration gradient of an n-type organic semiconductor component and a p-type organic semiconductor component across a thickness of the photoelectric conversion layer, and the concentration gradient on the photoelectric conversion layer is created by applying a poor solvent on the photoelectric conversion layer after the photoelectric conversion layer is created and then vaporizing the poor solvent, where: the poor solvent is a solvent in which the n-type organic semiconductor component can be dissolved; the poor solvent has a boiling point higher than that of a good solvent used in a process of creating the photoelectric conversion layer; and the poor solvent can be distilled away at room temperature.