Abstract: An OLED device comprises a cathode, an anode and a light-emitting layer therebetween, wherein the light-emitting layer comprises a host containing an anthracene nucleus and a light-emitting material comprising a 1,3-butadiene nucleus, wherein the butadiene nucleus is substituted in the 1 and 4 positions with independently selected aromatic groups, and wherein at least one of said aromatic groups is further substituted with an amino group, and wherein said amino group is further substituted with two independently selected aryl or heteroaryl groups.

Abstract: An organic electroluminescent device comprises a cathode, an anode, and has therebetween a light-emitting layer comprising an emissive component represented by formula (I): wherein: Ar1, each Ar2, and Ar3 through Ar7 are independently selected aryl or heteroaryl groups, which may contain additional fused rings and provided that two aryl or heteroaryl rings may be joined; n is 1, 2 or 3.

Abstract: An electroluminescent device includes a light-emitting layer containing a host material and: (a) a compound of Formula (1): X1—Ar1—C(R1)?C(R2)—Ar2 ??(1) wherein: Ar1 represents a divalent aromatic group; Ar2 represents an aromatic group; X1 represents at least one electron-donating group; R1 and R2 independently represent hydrogen or a substituent; and (b) a light-emitting boron complex having an absorption spectrum that overlaps with the emission spectrum of compound (1). The device serves to improve luminance efficiency while maintaining good color purity.

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: Disclosed is an electroluminescent device comprising a light emitting layer comprising a boron complex wherein the boron is bonded to a nitrogen atom of a first 5-membered heteroaromatic ring group and to a nitrogen atom of a second 5-membered heteroaromatic ring group, provided that the 5-membered rings are further connected by a methene or an imine bridge to form a six-membered ring, and provided further that at least one of the 5-membered rings contains at least one additional heteroatom that is divalent or trivalent.

Abstract: Disclosed is an electroluminescent device comprising a light emitting layer comprising a boron complex wherein the boron is bonded to a nitrogen atom of a 6-membered heteroaromatic ring group and to a nitrogen atom of a 5-membered heteroaromatic ring group, provided that the 5- and 6-membered heteroaromatic ring groups are further connected by an imine group, and provided that the 5-membered heteroaromatic ring group contains at least one additional heteroatom that is divalent or trivalent, and a process or device employing the device.

Abstract: Disclosed is an electroluminescent device comprising a light-emitting layer containing a light emitting phosphorescent material that contains an organometallic complex comprising iridium and an indole compound with an unsubstituted phenyl ring or comprising Ir, Rh, Os, Ru, Pt, and Pd and an isoindole compound. The invention further comprises compositions of certain such complexes as well as a display or area lighting devices and a process for emitting light. The organometallic materials function as useful phosphorescent light emitting materials in electroluminescent devices.