Sumitomo Chemical Company, Limited

Kazuhito Watanabe

Toshiya Kuroda

An objective of the present invention is to provide a substrate that can achieve high light extraction efficiency, and to provide an organic EL light-emitting apparatus with high light-emitting efficiency by using such a substrate. The present invention is a substrate () comprising a transparent substrate () and a light-concentrating structural body layer (), wherein the light-concentrating structural body layer () includes a plurality of structural bodies () having a conic shape or a hemispherical shape, with the bottom faces of the plurality of structural bodies () having a conic shape or a hemispherical shape being located on the same plane. The structural body () is preferably a structural body having a cone shape, a square pyramid shape or a triangular pyramid shape.

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Tsukuba, Japan

Kazuhito Watanabe