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:
Feb. 21, 2023
Filed:
Apr. 20, 2018
Sumitomo Chemical Company, Limited, Tokyo, JP;
Toshiaki Sasada, Tsukuba, JP;
Rei Okamura, Tsukuba, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
A light emitting device having excellent luminance life contains an anode, a cathode, a first organic layer disposed between the anode and the cathode and a second organic layer disposed between the anode and the cathode. The first organic layer contains a compound represented by the formula (C-1), and the second organic layer contains a compound represented by the formula (C-1) and a cross-linked body of a crosslinkable material. Ring Rand Ring Rrepresent an aromatic hydrocarbon ring or an aromatic hetero ring and Rrepresents an oxygen atom, a sulfur atom or a group represented by the formula (C'-1). Ring Rand Ring Rrepresent an aromatic hydrocarbon ring or an aromatic hetero ring and R′ represents a carbon atom, a silicon atom, a germanium atom, a tin atom or a lead atom.