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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 9929368 B1

PDFFull Text
Date of Patent:
Mar. 27, 2018

Filed:

Jan. 28, 2015

Light-emitting element, lighting device, and electronic appliance

Applicant:

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

Inventors:

Riho Kataishi, Kanagawa, JP;

Toshiki Sasaki, Kanagawa, JP;

Yusuke Nonaka, Kanagawa, JP;

Hiromi Seo, Kanagawa, JP;

Assignee:

Semiconductor Energy Laboratory Co., LTD., Kanagawa-ken, JP;

Attorneys:

Nixon Peabody LLP

Jeffrey L. Costellia

Primary Examiner:

Victor A Mandala

Int. Cl.
CPC ...
H01L 29/10 (2006.01); H01L 29/12 (2006.01); H01L 51/50 (2006.01); C09K 11/06 (2006.01); H05B 33/14 (2006.01); G06F 3/041 (2006.01); H01L 51/00 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); F21Y 115/10 (2016.01); F21V 33/00 (2006.01); F21W 131/301 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5092 (2013.01); C09K 11/06 (2013.01); G06F 3/041 (2013.01); H01L 27/322 (2013.01); H01L 27/323 (2013.01); H01L 27/3262 (2013.01); H01L 51/5072 (2013.01); H01L 51/5206 (2013.01); H01L 51/5278 (2013.01); H05B 33/14 (2013.01); H05B 33/145 (2013.01); C09K 2211/1007 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/185 (2013.01); F21V 33/0012 (2013.01); F21W 2131/301 (2013.01); F21Y 2115/10 (2016.08); H01L 27/3209 (2013.01); H01L 27/3244 (2013.01); H01L 51/006 (2013.01); H01L 51/0081 (2013.01); H01L 51/0085 (2013.01); H01L 51/524 (2013.01); H01L 51/5246 (2013.01); H01L 51/5259 (2013.01); H01L 51/5268 (2013.01); H01L 2251/5353 (2013.01); H01L 2251/5361 (2013.01);
Abstract

A tandem light-emitting element employing an inverted-structure is provided. The light-emitting element includes a cathode, a first EL layer over the cathode, a second EL layer over the first EL layer, an anode over the second EL layer, and an intermediate layer. The intermediate layer is between the first EL layer and the second EL layer. The intermediate layer includes a first layer, a second layer over the first layer, and a third layer over the second layer. The first layer includes a hole-transport material and an electron acceptor. The third layer includes an alkali metal or an alkaline earth metal. The second layer includes an electron-transport material.

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