US Patent No. 10,219,349

ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING A MICRO-CAVITY LIGHT EXTRACTION STRUCTURE


Patent No. 10,219,349
Issue Date February 26, 2019
Title Organic Electroluminescence Device Including A Micro-cavity Light Extraction Structure
Inventorship Kazuki Matsunaga, Sakai (JP)
Katsuhiro Kikuchi, Sakai (JP)
Hideki Uchida, Sakai (JP)
Satoshi Inoue, Sakai (JP)
Masanori Ohara, Sakai (JP)
Eiji Koike, Sakai (JP)
Yuto Tsukamoto, Sakai (JP)
Yoshiyuki Isomura, Sakai (JP)
Assignee SHARP KABUSHIKI KAISHA, Sakai (JP)

Claim of US Patent No. 10,219,349

1. An organic electroluminescence device comprising:a base material in which a recess is provided at a first upper surface of the base material;
a reflective layer that is provided at least along a surface of the recess;
a filling layer that is filled into an inside of the recess via the reflective layer, the filling layer having light transmissivity;
a first electrode that is provided at least on a layer above the filling layer, the first electrode having light transmissivity;
an organic layer that is provided on a layer above the first electrode, the organic layer comprising at least a light-emitting layer; and
a second electrode that is provided on a layer above the organic layer, the second electrode having light transmissivity and light reflectivity, wherein
a portion of the reflective layer contacts a portion of the first electrode,
the first electrode includes a step that extends along an edge portion of the recess, and
the first electrode contacts the reflective layer at the edge portion.