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:
Dec. 03, 2019
Filed:
Apr. 24, 2015
Sumitomo Chemical Company, Limited, Tokyo, JP;
Toshiaki Sasada, Tsukuba, JP;
Makoto Anryu, Tokyo, JP;
Takakazu Saito, Tsukuba, JP;
Rei Okamura, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A light emitting device including an anode, a cathode, a light emitting layer disposed between the anode and the cathode, and a hole transporting layer disposed between the anode and the light emitting layer is described. The light emitting layer is a layer containing an iridium complex (A) and a heterocyclic compound constituted of typical elements (B), the hole transporting layer is a layer containing a crosslinked body of a crosslinkable material. The molecular weight (MA) of the iridium complex (A) and the molecular weight (MB) of the heterocyclic compound (B) satisfy the formula 2700≤MA+MB≤10000 (M1-1) and the formula 0.35≤MA/MB≤3.00 (M2-1).