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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 12089488 B1

PDFFull Text
Date of Patent:
Sep. 10, 2024

Filed:

Dec. 06, 2018

Organic electroluminescent device

Applicant:

Hodogaya Chemical Co., Ltd., Tokyo, JP;

Inventors:

Norimasa Yokoyama, Tokyo, JP;

Shuichi Hayashi, Tokyo, JP;

Shigeru Kusano, Tsukuba, JP;

Assignee:

Hodogaya Chemical Co., Ltd., Tokyo, JP;

Attorneys:

Locke Lord LLP

James E. Armstrong, IV

Nicholas J. DiCeglie, Jr.

Primary Examiner:

Dylan C Kershner

Int. Cl.
CPC ...
H10K 85/60 (2023.01); C07C 211/54 (2006.01); C07C 211/58 (2006.01); C07D 209/88 (2006.01); C07D 213/38 (2006.01); C07D 333/76 (2006.01); C09B 57/00 (2006.01); H10K 50/15 (2023.01); H10K 50/844 (2023.01); H10K 50/858 (2023.01);
U.S. Cl.
CPC ...
H10K 85/626 (2023.02); C07D 209/88 (2013.01); C07D 213/38 (2013.01); C07D 333/76 (2013.01); C09B 57/008 (2013.01); H10K 85/60 (2023.02); H10K 85/615 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); C07C 211/54 (2013.01); C07C 211/58 (2013.01); H10K 50/15 (2023.02); H10K 50/844 (2023.02); H10K 50/858 (2023.02);
Abstract

An organic electroluminescent device having a capping layer composed of material having a high refractive index, excelling in thin film stability and durability and having no absorption in the respective wavelength ranges of blue, green, and red is provided to improve device characteristics of the organic electroluminescent device, particularly to greatly improve light extraction efficiency. The organic electroluminescent device has at least an anode electrode, a hole transport layer, a light emitting layer, an electron transport layer, a cathode electrode, and the capping layer in this order, wherein the capping layer contains an arylamine compound (X) having a structure in which two triphenylamine structures are joined within a molecule via a single bond or a divalent group that does not contain a heteroatom.

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