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. 02, 2016
Filed:
Jul. 26, 2007
Subramaniam Ganeshamurugan, Barking, GB;
Poopathy Kathirgamanathan, North Harrow, GB;
Sivagnanasundram Surendrakumar, Middlesex, GB;
Seenivasagam Ravichandran, London, GB;
Yun Fu Chan, Ingleby Barwick, GB;
Subramaniam Ganeshamurugan, Barking, GB;
Poopathy Kathirgamanathan, North Harrow, GB;
Sivagnanasundram Surendrakumar, Middlesex, GB;
Seenivasagam Ravichandran, London, GB;
Yun Fu Chan, Ingleby Barwick, GB;
Merck Patent Gmbh, , DE;
Abstract
Electroluminescent devices are disclosed comprising a transparent anode; a layer of a hole transporting material; a layer of an electroluminescent material; a layer of an electron transporting material; a layer of a substituted lithium quinolate; and a metal cathode. The electroluminescent device may be an organic light-emitting diode having a cathode, an electron injection layer in contact with the cathode and an electron transport layer in contact with the electron injection layer and comprising aluminum, zirconium or hafnium quinolate or a mixture thereof or a mixture of any of them with a quinolate of a metal of group 1, 2, 3, 13 or 14 of the periodic table. Such devices may be made by the steps of forming a substituted lithium quinolate having one or more substituents and depositing the substituted lithium quinolate on a cathode of the device to provide an electron injection layer.