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.

Abstract: 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:

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

Abstract: Electroluminescent devices have an electroluminescent layer incorporating iridium complexes with 2-benzo[b]thiophenyl and benzimidazole ligands such as bis[thiophen-2-yl-pyridine-C2,N?]-2-(2-pyridyl)-benzimidazole iridium.

Abstract: 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 R1, R2 and R3 can 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.

Abstract: Embodiments of electroluminescent devices of the invention are preferably formed of 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 lithium quinolate or of a substituted lithium quinolate e.g. of thickness less than 7 nm; and a metal cathode. The layer of the metal quinolate is preferably about 0.3-0.5 nm in thickness.

Abstract: 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.

Abstract: 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.

Abstract: An OLED with a donor which is doped metal quinolate in which the metal is a transition metal in the four or five valent state.

Abstract: The invention relates to an optical light emitting diode device having an electroluminescent layer and an electron transport layer, wherein the electron transport layer contains zirconium or hafnium quinolate for slowing loss of luminance at a given current density with increase of the time for which the device has been operative. The invention also relates to OLEDs, improved efficiency and/or lifetime is obtained by using zirconium or hafnium quino late as electron transport material.

Abstract: 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).

Abstract: Novel iridium complexes are electroluminescent.

Abstract: Novel boron complexes are blue emissive electroluminescent compounds.

Abstract: Lithium quinolate is a host material for organometallic electroluminescent materials to form an electroluminescent layer in an electroluminescent device.

Abstract: Electroluminescent devices with an improved buffer layer on the anode, wherein the buffer material is selected from metal tetra-p-tolyl porphonato complexes, and bianthryl compounds of Formula (I) or (II).

Abstract: A method of spin coating electroluminescent organo metallic by coating the anode with a polymer before spin coating.

Abstract: A hole transporting or hole conducting material for use in electroluminescent devices is a diamino dianthracene.

Abstract: An electroluminescent compound is a diarylamine anthracene compound.

Abstract: 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).

Abstract: 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 R1, R2 and R3 can 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.