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US Patent 7662485 White organic light-emitting devices with improved performance

Patent 7662485 was granted and assigned to Eastman Kodak on February, 2010 by the United States Patent and Trademark Office.

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Patent abstract

An organic light-emitting diode (OLED) device produces white light, includes a) an anode; b) a hole-transporting layer disposed over the anode; c) a blue light-emitting layer disposed over the hole-transporting layer; d) an electron-transporting layer disposed over the blue light-emitting layer; e) a cathode disposed over the electron-transporting layer; wherein the hole-transporting layer comprises an entire layer or a partial portion of a layer in contact with the blue light-emitting layer and contains a light-emitting naphthacene compound having a specified formula.

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