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Superstructured Thin Film Chemistry group (M. Kawasaki's group) has developed a high-performance ultraviolet photodetector with ZnO and a conducting polymer. The research was conducted under the collaboration with ROHM Co. Ltd., Kyoto. A conducting polymer, PEDOT:PSS, worked as Schottky contact to ZnO with low defects at the interface. The new-type Schottky diode gives rise to nearly 100% quantum efficiency in the ultraviolet wavelengths. The harmless materials and low-cost processes make the devices promising for the industrialization. The achievements have been published in the September 24th issue of Applied Physics Letters, and also introduced in news papers (Kagaku Shimbun, 2008.10.3 and Nikkan Kogyo Shimbun, 2008.10.6).