A mixture of carbazole and triazine derivatives that can be thermally evaporated from one crucible to fabricate thin films for electroluminescent devices is disclosed.

An organometallic compound represented by Formula 1A:

##STR00001## wherein, in Formula 1A, groups and variables are the same as described in the specification.

An organic electroluminescence device comprising: a cathode, an anode, and at least one organic layer disposed between the cathode and the anode, wherein at least one layer of the at least one organic layer comprises a compound represented by the following formulas (1-1) and (1-3) or a compound represented by the following formulas (1-2) and (1-3).

##STR00001##

An organic light-emitting device including a first electrode, a second electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, the emission layer includes a host, a dopant, and a sensitizer, the host does not include a metal atom, the dopant emits light, and the light has a decay time of about 100 nanoseconds or less, and the sensitizer includes an organometallic compound represented by one selected from Formulae 1 and 2 described in the specification.

Provided are compounds having the structure of Formula I:

##STR00001##

Formula I;

wherein A is B, Al, Bi, or is not present; and L.sup.1-L.sup.4 are each independently selected from the group consisting of O, S, Se, NR, BR, BRR′, CRR′, SiRR′, GeRR′, P(O)R, and C═X; and L.sup.3 and L.sup.4 are each optionally present; wherein each R, R′, R″, R″″, R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E, R.sup.F, and R.sup.G is hydrogen or a substituent; and any two adjacent R, R′, R″, R″″, R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E, R.sup.F, and R.sup.G can be joined or fused to form a ring. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Provided are compounds, formulations comprising compounds, and devices that utilize compounds, where the devices include a substrate, a first electrode, an organic emissive layer comprising an organic emissive material disposed over the first electrode. The device includes an enhancement layer, comprising a plasmonic material exhibiting surface plasmon resonance that non-radiatively couples to the organic emissive material and transfers excited state energy from the organic emissive material to the non-radiative mode of surface plasmon polaritons. The enhancement layer is provided no more than a threshold distance away from the organic emissive layer, where the organic emissive material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer. At least one of the organic emissive material and the organic emissive layer has a vertical dipole ratio (VDR) value of equal or greater than 0.33.

An organic electroluminescent device includes a cathode, an anode, and organic layers intervening between the cathode and the anode, where the organic layers include a light emitting layer and an electron transporting layer, where the electron transporting layer contains a compound A represented by formula (1), and the light emitting layer contains a host material B represented by formula (10):

##STR00001##

Embodiments of the disclosed subject matter provide an apparatus having a device with a micronozzle array disposed on a micro-fabricated fluidic die. The device may include a first gas distribution plate and a second opposing plate, where the micro-fabricated fluidic die is disposed between the first gas distribution plate and the second opposing plate, wherein the first gas distribution plate is irreversibly joined to the micronozzle array with a seal that is gas-tight, and where the first gas distribution plate includes a plurality of sealed flow paths. A manifold may be reversibly joined to the first gas distribution plate, where the micro-fabricated fluidic die and the first gas distribution plate and the second opposing plate are disposed between the manifold. A thermally conductive plate may have at least one window that provides a clearance fit for the device across a range of motion relative to the thermally conductive plate.

To provide a practically useful organic electroluminescent device which is improved in luminous efficiency and at the same time, sufficiently secures the stability during driving. An organic electroluminescent device, wherein a light-emitting layer includes two host materials different from each other, and a dopant material, one of the host materials is a compound represented by general formula (1) and the other of the host materials is a compound represented by general formula (2). A ring A is a heterocycle represented by formula (1a), X represents N or C—Ar′, Y represents O, S, N—Ar.sup.3, or C—Ar.sup.4Ar.sup.5, and any one of Z.sup.1 to Z.sup.4 represents a carbon atom binding to a 6-membered ring containing X and the others and Z.sup.5 to Z.sup.8 each represent C—Ar′ or N. Ar, Ar′ and Ar.sup.1 to Ar.sup.5 each represent, for example, hydrogen, or an alkyl group having 1 to 20 carbon atoms. A ring B is a heterocycle represented by formula (2a), and Ar.sup.6 and Ar.sup.7 each represent, for example, hydrogen, or an alkyl group having 1 to 20 carbon atoms.

To provide an organic EL device having high efficiency and extended lifetime while having a low driving voltage, and a material for an organic electroluminescent device suitable therefor. This material for an organic electroluminescent device is comprised of an indolocarbazole compound represented by the following general formula (1):

[C1]

##STR00001##

wherein a ring A is a heterocycle represented by formula (1a); Ar.sup.1 and Ar.sup.2 each represent an aromatic hydrocarbon group, an aromatic heterocyclic group, or a linked aromatic group; L.sup.2 represents an aromatic heterocyclic group; Ar.sup.3 represents an aromatic hydrocarbon group or a linked aromatic group in which a plurality of these aromatic hydrocarbon groups are linked to each other; and a+b+c≥1.