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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 11411193 B1

PDFFull Text
Date of Patent:
Aug. 09, 2022

Filed:

Jun. 12, 2020

Organic light emitting element, comprising at least first and second light emitting layers with satisfying lowest unoccupied molecular orbital (lumo) and highest occupied molecular orbital (homo) relations

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Hirokazu Miyashita, Ebina, JP;

Itaru Takaya, Atsugi, JP;

Naoki Yamada, Inagi, JP;

Isao Kawata, Kawasaki, JP;

Yuto Ito, Kokubunji, JP;

Jun Kamatani, Tokyo, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Canon U.S.A., Inc., IP Division

Primary Examiner:

Daniel Whalen

Int. Cl.
CPC ...
H01L 51/50 (2006.01); H01L 27/32 (2006.01); H01L 51/52 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5004 (2013.01); H01L 27/3234 (2013.01); H01L 27/3262 (2013.01); H01L 51/5036 (2013.01); H01L 51/5206 (2013.01); H01L 51/5221 (2013.01); H01L 2251/552 (2013.01);
Abstract

An organic light emitting element includes, in sequence, an anode, a first light emitting layer, a second light emitting layer, and a cathode. The first light emitting layer includes a first compound and a first light emitting material. The second light emitting layer includes a second compound and a second light emitting material having an energy gap different from an energy gap of the first light emitting material. The organic light emitting element satisfies relations (a) to (c).LUMO(1)>LUMO(1)  (a)LUMO(2)>LUMO(2)  (b)LUMO(2)−LUMO(2)>LUMO(1)−LUMO(1)  (c)Where LUMO (H1), LUMO (D1), LUMO (H2), and LUMO (D2) represent a LUMO level of the first compound, a LUMO level of the first light emitting material, a LUMO level of the second compound, and a LUMO level of the second light emitting material, respectively.

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