Abstract: An electroluminescent device comprising a host material and a rubrene derivative having a naphthacene nucleus comprising four fused phenyl rings a, b, c, and d, in order, containing two secondary phenyl ring groups linked to the “c” ring, each bearing directly or indirectly a fluoro or perfluoroalkyl group, wherein each fluoro or perfluoroalkyl group is either: a) linked directly to one of said secondary phenyl rings and is located on a meta or ortho position, or b) located in any position of another aryl group linked directly or indirectly to one of the secondary phenyl rings.

Abstract: A process for forming a film of the facial-isomer of an aluminum trisquinoline complex comprises depositing a film of an aluminum trisquinoline complex on a support, depositing an inert barrier layer over the layer of aluminum trisquinoline complex that encapsulates aluminum trisquinoline complex to form a multilayer composite, and then heating the composite at a temperature below the melting point temperature of the complex for a time sufficient to convert the aluminum trisquinoline complex to at least 99 mol % of the facial-isomer that fluoresces with a maximum emission intensity below 510 nm. The product has a blue hue.

Abstract: An OLED device comprises a light-emitting layer containing a hydrocarbon host material and a light-emitting material of Formula (1): wherein: each Ar represents an independently selected aromatic group; each R1 represents an independently selected alkyl group or aromatic group; n is 1 or 2; Za represents the atoms necessary to form an aromatic ring group; R represents hydrogen or a substituent group; Z represents hydrogen or a substituent group; and L1 and L2 represent independently selected substituent groups; provided that any two adjacent substituents of any of the above groups may join to form a ring.

Abstract: An organic light emitting diode (OLED) device comprises a cathode, a light emitting layer and an anode, in that order, and, has located between the cathode and the light emitting layer, a layer containing (a) more than 10 vol % of a carbocyclic fused ring aromatic compound and (b) at least one salt or complex of an alkali or alkaline earth metal. The device provides reduced drive voltage and good luminance.

Abstract: An organic light emitting diode (OLED) device contains a cathode, a light emitting layer and an anode, in that order, and, has located between the cathode and the light emitting layer, a layer containing (a) more than 10 vol % of a carbocyclic fused ring aromatic compound and (b) a complex of a monovalent metal. The device provides reduced drive voltage and good luminance.

Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and an emitting dopant located between a cathode and an anode wherein the dopant is a naphthacene derivative represented by formula (I): wherein: a) said naphthacene derivative contains at least one fluorine or fluorine containing group; and b) when exactly two fluorine containing groups are present said groups are not located at the 5- and 12-positions or at the 6- and 11-positions.

Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (I): wherein: a) there are identical aromatic groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the aromatic groups in paragraph a); and c) the phenyl rings in the 6- and 12-positions are substituted or not.

Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (II): wherein: a) there are identical branched alkyl or non-aromatic carbocyclic groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the branched alkyl or non-aromatic carbocyclic groups in paragraph a); and c) the phenyl rings in the 6- and 12-positions are substituted.

Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (I): wherein: a) there are identical oxy, aza or thio groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the oxy, aza or thio groups in paragraph a); c) the phenyl rings in the 6- and 12-positions are substituted; and provided that when a single substituent on both phenyl rings in paragraph c) are present, said substituent is not a methoxy group located at the para-position.

Abstract: A process for characterizing the phase of an organic material in a thin film comprises employing a reference spectrum library for potential phases, subjecting the film to a vibrational spectroscopy measurement to obtain a resulting spectrum; and comparing the resulting spectrum to those in the reference library to characterize the phase of the organic material.

Abstract: An OLED device produces white light and comprises (A) a red light emitting layer and (B) a blue light emitting layer wherein the red light emitting layer contains a certain type of electroluminescent component having a first bandgap, a non-electroluminescent component having a second bandgap, and one or more further non-electroluminescent components having further bandgaps in which the bandgaps all have a specified relationship.

Abstract: An OLED device comprises a light emitting layer containing a certain type of electroluminescent component having a first bandgap, a non-electroluminescent component having a second bandgap, and one or more further non-electroluminescent components having further bandgaps, wherein the components have certain bandgap relationships.

Abstract: A process for improving the stability to photo-oxidation of a polycyclic aromatic compound having at least two polymorphic forms comprises treating a first polymorph with one or more solvents to obtain the more stable second polymorph and then separating the second polymorph from the solvent.

Abstract: A process for synthesizing a single isomer of a naphthacene compound comprises the steps of: (a) reacting a symmetrically substituted 1,1-diarylpropargyl alcohol compound with a reagent capable of forming a leaving group to form a reaction mixture containing a intermediate; and then (b) heating the intermediate in the presence of a solvent and in the absence of any oxidizing agent to form a single naphthacene compound.

Abstract: A process for synthesizing a single isomer of a naphthacene compound comprises the steps of: (a) reacting a symmetrically substituted 1,1-diarylpropargyl alcohol compound with a reagent capable of forming a leaving group to form a reaction mixture containing a intermediate; and then (b) heating the intermediate in the presence of a solvent and in the absence of any oxidizing agent to form a single naphthacene compound.

Abstract: A process for synthesizing a naphthacene compound comprises the steps of: (a) reacting a propargyl alcohol compound with a reagent capable of forming a leaving group to form a reaction mixture containing an intermediate; and then (b) heating the intermediate in the presence of a solvent and in the absence of any oxidizing agent and in the absence of any base, to form the naphthacene compound.

Abstract: A process for forming the facial isomer of an aluminum trisquinoline complex comprises heating the solid aluminum trisquinoline complex material at a temperature at least 50° C. below the melting point temperature of the solid for a time sufficient to convert the aluminum trisquinoline complex to at least 99 mol % of one polymorph of thefacial-isomer that fluoresces with a maximum intensity below 510 nm.

Abstract: A process for forming a film of the facial-isomer of an aluminum trisquinoline complex comprises depositing a film of an aluminum trisquinoline complex on a support, depositing an inert barrier layer over the layer of aluminum trisquinoline complex that encapsulates aluminum trisquinoline complex to form a multilayer composite, and then heating the composite at a temperature below the melting point temperature of the complex for a time sufficient to convert the aluminum trisquinoline complex to at least 99 mol % of the facial-isomer that fluoresces with a maximum emission intensity below 510 nm. The product has a blue hue.

Abstract: An electroluminescent device comprising a host material and a rubrene derivative having a naphthacene nucleus comprising four fused phenyl rings a, b, c, and d, in order, containing two secondary phenyl ring groups linked to the “c” ring, each bearing directly or indirectly a fluoro or perfluoroalkyl group, wherein each fluoro or perfluoroalkyl group is either: a) linked directly to one of said secondary phenyl rings and is located on a meta or ortho position, or b) located in any position of another aryl group linked directly or indirectly to one of the secondary phenyl rings.

Abstract: An organic light-emitting diode (OLED) device produces white light, includes a) an anode; b) a hole-transporting layer disposed over the anode; c) a blue light-emitting layer disposed over the hole-transporting layer; d) an electron-transporting layer disposed over the blue light-emitting layer; e) a cathode disposed over the electron-transporting layer; wherein the hole-transporting layer comprises an entire layer or a partial portion of a layer in contact with the blue light-emitting layer and contains a light-emitting naphthacene compound having a specified formula.