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.:
Date of Patent:
Sep. 13, 2022
Filed:
Oct. 17, 2017
Applicant:
Konica Minolta, Inc., Tokyo, JP;
Inventors:
Kazuhiro Oikawa, Hachioji, JP;
Akihiro Kimura, Hino, JP;
Assignee:
MERCK PATENT GMBH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/00 (2006.01); C07D 213/22 (2006.01); C07D 271/107 (2006.01); C07D 401/14 (2006.01); C07D 405/14 (2006.01); C07D 471/04 (2006.01); C07D 471/14 (2006.01); C07D 487/04 (2006.01); C07D 495/04 (2006.01); C07F 9/6568 (2006.01); C07F 9/6571 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
H01L 51/0072 (2013.01); C07D 213/22 (2013.01); C07D 271/107 (2013.01); C07D 401/14 (2013.01); C07D 405/14 (2013.01); C07D 471/04 (2013.01); C07D 471/14 (2013.01); C07D 487/04 (2013.01); C07D 495/04 (2013.01); C07F 9/65685 (2013.01); C07F 9/657163 (2013.01); H01L 51/007 (2013.01); H01L 51/0052 (2013.01); H01L 51/0067 (2013.01); H01L 51/0071 (2013.01); H01L 51/0073 (2013.01); H01L 51/0074 (2013.01); H01L 51/5012 (2013.01); H01L 51/5016 (2013.01); H01L 51/5072 (2013.01); H01L 2251/558 (2013.01);
Abstract
Provided is an organic electroluminescent element having high efficiency, a long lifetime, and bending resistance. An organic electroluminescent element includes a light emitting layer and an electron transport layer adjacent to the light emitting layer between a positive electrode and a negative electrode. A host compound of the light emitting layer has an ionization potential deeper than that of a light emitting dopant of the light emitting layer by 0.3 eV or more. At least one organic compound contained in the electron transport layer has a molecular dipole moment of 6.0 debye or more.