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:
Mar. 22, 2022
Filed:
Jul. 13, 2018
Sumitomo Chemical Company Limited, Tokyo, JP;
James Lee, Godmanchester, GB;
Martin Humphries, Godmanchester, GB;
William Tarran, Godmanchester, GB;
Nazrul Islam, Godmanchester, GB;
Sumitomo Chemical Company Limited, Tokyo, JP;
Abstract
A phosphorescent compound of formula (I): wherein: M is a transition metal; Cis a carbon atom forming a metal-carbene bond with M; A is a saturated bridged bicyclic or saturated bridged tricyclic group consisting of one nitrogen atom and 6-12 carbon atoms; either: (i) Xis a bridgehead carbon atom of the bridged bicyclic or bridged tricyclic group and Xis NRwherein Ris a substituent, or (ii) Xis N and Xis a bridgehead group of formula CRwherein Ris H or a substituent; Aris a Caromatic group or a 5-20 membered heteroaromatic group; L in each occurrence is independently a mono- or poly-dentate ligand other than a ligand of formula A-Ar; x is at least 1; and y is 0 or a positive integer. The compound of formula (I) may be used as a blue light-emitting material in a white organic light-emitting device.