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. 09, 2018
Filed:
Dec. 18, 2015
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Yui Yamada, Kanagawa, JP;
Hideko Inoue, Kanagawa, JP;
Hiromi Seo, Kanagawa, JP;
Tatsuyoshi Takahashi, Kanagawa, JP;
Abstract
To provide an organometallic complex with high emission efficiency and high heat resistance, which emits yellow green light. The organometallic complex includes a metal and a ligand which is a benzo[h]quinazoline skeleton including a condensed ring bonded to benzo[h]quinazoline through a carbon-carbon bond between the 5-position and the 6-position. The organometallic complex has a structure represented by General Formula (G1). In General Formula (G1), M represents a metal belonging to Group 9 or 10; each of Rto Rindependently represents hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms; and Rrepresents hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted phenyl group. A ring X represents a substituted or unsubstituted six-membered aromatic ring formed with carbon or both carbon and nitrogen.