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:
Oct. 05, 2021
Filed:
Jun. 26, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Ryuji Ishii, Yokohama, JP;
Hiroki Ohrui, Kawasaki, JP;
Kei Tagami, Yokohama, JP;
Masumi Itabashi, Kodaira, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level Tof 1.8 eV or more; the hole transport material has a hole mobility of 1×10cm/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1):|reduction potential of hole transport material|−|reduction potential of host|>0.1 V  (1)and the following expression (2):|HOMO level of hole transport material−HOMO level of host|<0.1 eV  (2).