Nec Lighting, Ltd.

Yamagata Promotional Organization for Industrial Technology

Joji Suzuki

Yasuki Kawashima

Fujio Kajikawa

Shigeyuki Nakai

This invention provides an organic EL light-emitting device, which can prevent the occurrence of brightness unevenness due to resistance of a transparent electrode, in a large surface light-emitting panel of an organic EL element. The organic EL light-emitting device includes an element formation substrate, on which an organic EL elementincluding an organic light-emitting layer is stacked, and a sealing substratefor sealing the organic EL element so as to accommodate the organic EL element between the element formation substrate and the sealing substrate. A sealing portionformed of an adhesive is formed in the peripheral edge portion between the element formation substrateand the sealing substrate, and a grease layeror a gel layeris accommodated in between the element formation substrate, on which the organic EL element surrounded by the sealing portion is formed, and the plate-shaped sealing substrate so as to adhere to the element formation substrate and the sealing substrate. The grease layeror the gel layercontains an oligomer or a polymer having organosiloxane bond (&#x2014;RSiO&#x2014;) or fluorinated polyether (&#x2014;CFCFYO&#x2014;) as a skeleton.

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Yamagata, Japan

Joji Suzuki