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:
Apr. 24, 2018
Filed:
Jul. 11, 2012
Sukekazu Aratani, Tokyo, JP;
Hirotaka Sakuma, Tokyo, JP;
Shingo Ishihara, Tokyo, JP;
Naoya Tokoo, Tokyo, JP;
Hiroshi Sasaki, Tokyo, JP;
Sukekazu Aratani, Tokyo, JP;
Hirotaka Sakuma, Tokyo, JP;
Shingo Ishihara, Tokyo, JP;
Naoya Tokoo, Tokyo, JP;
Hiroshi Sasaki, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
In an organic light-emitting element including a first electrode, a second electrode, and a light-emitting layer placed between the first electrode and the second electrode, the light-emitting layer includes a host material, a first emitter, and a second emitter, the emission peak wavelength of the first emitter is longer than the emission peak wavelength of the second emitter, and an aromatic heterocyclic ligand or an auxiliary ligand of the first emitter include an electron withdrawing group. Accordingly, an organic light-emitting element can be provided in which the HOMO value of a specific luminescent dopant is closer to the HOMO value of another luminescent dopant.