Merck Patent Gmbh

Nissan Chemical Industries Limited

Oled-T Limited

Subramaniam Ganeshamurugan

Poopathy Kathirgamanathan

Sivagnanasundram Surendrakumar

Gnanamoly Paramaswara

Arumugam Partheepan

Juan Antipan-Lara

Richard Price

Selvadurai Selvaranjan

Muttulingam Kumaraverl

Yun Fu Chan

Seenivasagam Ravichandran

Vijendra Kandappu

Alexander Kit Lay

Matthew Samuel Kirkham

Selvadural Selvaranjan

Sutheralingam Suresh

Muttullingham Kumaraverl

Patrick Gemmell

Muthulingham Kumaraverl

Muttulingham Kumaraverl

Sivagnanasumdram Surendrakumar

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.

Cathode coating

The present invention relates to heteroleptic electroluminescent metal complexes and to their preparation and use in electroluminescent devices, particularly to electroluminescent compounds having the general chemical formula: 

Electroluminescent materials and devices

Novel ruthenium, rhodium, palladium, osmium, iridium or platinum complexes of dibenzothiophene ligands are electroluminescent compounds.

Electroluminescent devices have an electroluminescent layer incorporating iridium complexes with 2-benzo[b]thiophenyl and benzimidazole ligands such as bis[thiophen-2-yl-pyridine-C,N']-2-(2-pyridyl)-benzimidazole iridium.

An electroluminescent composition is provided comprising: (a) a compound of the general chemical formula (I): wherein M is lithium, sodium, potassium, rubidium, caesium, beryllium, magnesium, calcium, strontium, barium, copper, silver, gold, zinc, boron, aluminum, gallium, indium, germanium, tin, antimony, lead, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, cadmium or chromium; n is the valence of M; and R, Rand Rcan be the same or different, and are selected from hydrogen, a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aromatic, heterocyclic or polycyclic ring structure, a fluorocarbon, a halogen or a nitrile group; and (b) a suitable dopant. The composition may be used in forming electroluminescent devices.

An improved electroluminescent device has a layer of a first electroluminescent metal complex or organo metallic complex and a layer of a second metal complex or organo metallic complex in which the band gap of the metal in the second electroluminescent metal complex or organo metallic complex is larger than the band gap of the metal in the first electroluminescent metal complex or organo metallic complex.

An electroluminescent material is a metal complex of 1-phenyl-3-methyl-4-trimethylacetyl-pyrazol-5-one of formula (I). An electroluminescent device comprising the compound of formula (I) in the luminescent layer is also part of the invention. 

Novel ruthenium, rhodium, palladium, osmium, iridium or platinum complexes of thianthrene ligands are electroluminescent compounds. According to the invention there is provided complexes of Formula (I). 

Novel boron complexes are blue emissive electroluminescent compounds.

Electroluminescent boron complexes

An electroluminescent material is a metal complex, preferably aluminium, of a substituted pyrazol-5-one.

A method of production of a homopolymer or copolymer or homo-oligomer or co-oligomer product characterised in that the product is obtained by condensation reaction of a diaminoanthracene, substituted or not, optionally with a diiminoanthracene substituted or not in the absence of anthraquinone substituted or not.

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London, United Kingdom

Subramaniam Ganeshamurugan