|発明の名称||ORGANIC THIN-FILM PHOTOELECTRIC CONVERTER AND METHOD OF MANUFACTURING THE SAME|
PROBLEM TO BE SOLVED: To produce an organic thin-film photoelectric converter under the atmosphere, increase the photoelectric conversion efficiency, and improve the durability.
SOLUTION: A TiO2 hole block layer produced by a wet process is provided between a photoelectric conversion layer and an electrode. When the TiO2 hole block layer is produced, the TiO2 hole block layer is made amorphous, by drying the TiO2 hole block layer in the air. Furthermore, between a PCBM:P3HT layer and the TiO2 hole block layer, an inclined concentration layer of PCBM/P3HT may be provided, which has a high concentration of PCBM, near the TiO2 hole block layer. Thus an electric resistance increases in this part, and the current loss of the photoelectric converter is minimized. Furthermore, since the concentration of PCBM, which is a conductive material, is high near the TiO2 hole block layer, electrons are made easier to flow into the TiO2 layer. According to these effects, the organic thin-film photoelectric converter, having an inclined configuration according to the present embodiment, has high photoelectric conversion efficiency and high durability.
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