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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10340470 B1

PDFFull Text
Date of Patent:
Jul. 02, 2019

Filed:

Feb. 17, 2017

Light-emitting element, display device, electronic device, and lighting apparatus

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;

Inventors:

Toshiki Sasaki, Kanagawa, JP;

Riho Kataishi, Kanagawa, JP;

Ryohei Yamaoka, Kanagawa, JP;

Assignee:

Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Andrew K Bohaty

Int. Cl.
CPC ...
H01L 51/54 (2006.01); H01L 51/50 (2006.01); H01L 27/32 (2006.01); H01L 51/52 (2006.01); H01L 27/12 (2006.01); H01L 29/24 (2006.01); H01L 29/786 (2006.01); H01L 51/00 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5008 (2013.01); H01L 27/323 (2013.01); H01L 27/3262 (2013.01); H01L 51/5012 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 51/5088 (2013.01); H01L 51/5092 (2013.01); H01L 51/5206 (2013.01); H01L 51/5221 (2013.01); H01L 51/5278 (2013.01); H01L 27/1225 (2013.01); H01L 29/24 (2013.01); H01L 29/7869 (2013.01); H01L 51/006 (2013.01); H01L 51/0052 (2013.01); H01L 51/0054 (2013.01); H01L 51/0058 (2013.01); H01L 51/0061 (2013.01); H01L 51/0072 (2013.01); H01L 51/0074 (2013.01); H01L 51/0081 (2013.01); H01L 51/0085 (2013.01); H01L 51/0091 (2013.01); H01L 2251/301 (2013.01); H01L 2251/303 (2013.01); H01L 2251/5353 (2013.01);
Abstract

A light-emitting element includes a cathode, an anode, a light-emitting layer, a first layer, a second layer, and a third layer. The first layer is provided between the cathode and the light-emitting layer. The second layer is provided between the light-emitting layer and the third layer and includes a region in contact with the third layer. The third layer is provided between the second layer and the anode and includes a region in contact with the anode. The first layer and the third layer each include an alkali metal or an alkaline earth metal. The second layer includes a material that has a function of transporting an electron.

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