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 invention provides new compounds of the formula I, II or III. These compounds can be used as electron transport materials in optical light emitting diodes (OLEDs).

Abstract: In OLEDs, improved efficiency is obtained by using compounds of formula [Ar](CH?CH—R1)n wherein n is an integer from 1 to 4; [Ar] is a polycyclic aromatic or heteroaromatic scaffold optionally substituted with one or more alkyl or alkoxy groups; and R1 is a 5-membered heteroaryl group optionally substituted with methyl, methoxy, aryl or heteroaryl, or is phenyl or naphthyl optionally substituted with methyl, methoxy, trifluoromethyl or cyano or is biphenyl or substituted biphenyl. The compounds are believed to be novel and can be made by condensing a compound of formula wherein [Ar] and n are as defined above with a compound of formula [Ar](CH3)nR1CHO in the presence of an acid catalyst e.g. an anhydride of an organic acid.

Abstract: A compound of the formula R1(CR3?CR4)nAr(CR4?CR3)nR2 wherein: n is 0 or 1; Ar represents aryl or heteroaryl having 1-5 aromatic rings which may be chain or fused or a combination of chain and fused, which may be substituted with alkoxy, fluoro, fluoroalkyl or cyano and which in the case of a 5-membered ring nitrogen heteroatom may be N-substituted with aryl or substituted aryl optionally further substituted with alkoxy, fluoro, fluoroalkyl or cyano; R1 and R2 independently represent aryl or nitrogen, oxygen or sulphur-containing heteroaryl having two to four fused aromatic rings one of which may be 5-membered and optionally substituted by aryl or heteroaryl having 1-5 chain or fused aromatic rings which may be further substituted with alkoxy, fluoro, fluoroalkyl or cyano; and R3 and R4 independently represent hydrogen, methyl, ethyl or benzyl.

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: The invention provides new compounds of the formula I, II or III. These compounds can be used as electron transport materials in optical light emitting diodes (OLEDs).

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: A compound of the formula R1(CR3?CR4)nAr(CR4?CR3)nR2 wherein: n is 0 or 1; Ar represents aryl or heteroaryl having 1-5 aromatic rings which may be chain or fused or a combination of chain and fused, which may be substituted with alkoxy, fluoro, fluoroalkyl or cyano and which in the case of a 5-membered ring nitrogen heteroatom may be N-substituted with aryl or substituted aryl optionally further substituted with alkoxy, fluoro, fluoroalkyl or cyano; R1 and R2 independently represent aryl or nitrogen, oxygen or sulphur-containing heteroaryl having two to four fused aromatic rings one of which may be 5-membered and optionally substituted by aryl or heteroaryl having 1-5 chain or fused aromatic rings which may be further substituted with alkoxy, fluoro, fluoroalkyl or cyano; and R3 and R4 independently represent hydrogen, methyl, ethyl or benzyl.

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 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 iridium complexes are electroluminescent.

Abstract: Novel boron complexes are blue emissive electroluminescent compounds.

Abstract: An electroluminescent material is a complex of boron and a beta diketone.

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

Abstract: An electroluminescent compound is a organometallic complex in which the metal is titanium, zirconium, hafnium, vanadium, niobium or tantulum.

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

Abstract: The use of unsubstituted or substituted polymer of an amino substituted aromatic compound as a hole transporting and/or hole injecting layer in an electroluminescent device using an organic metal complex as the electroluminescent material produced improved performance of the device.