A composition, including a first compound represented by Formula 1 and a second compound represented by Formula 2:

Ir(L.sub.11).sub.n11(L.sub.12).sub.n12(L.sub.13).sub.n13  Formula 1

Ir(L.sub.21).sub.n21(L.sub.22).sub.n22(L.sub.23).sub.n23  Formula 2

wherein L.sub.11, L.sub.12, L.sub.13, L.sub.21, L.sub.22, and L.sub.23 are each i) a bidentate ligand bonded to Ir of Formula 1 or 2 via two nitrogen atoms, ii) a bidentate ligand bonded to Ir of Formula 1 or 2 via a nitrogen atom and a carbon atom, or iii) a bidentate ligand bonded to Ir of Formula 1 or 2 via two carbon atoms, L.sub.11, L.sub.12, and L.sub.13 are different from one another; n11, n12, n21, and n22 are each independently 1 or 2; n13 and n23 are each independently 0 or 1; a sum of n11, n12, and n13 is 3; a sum of n21, n22, and n23 is 3; and L.sub.11 and L.sub.21 are different from each other.

Provided are an organic electroluminescent material and a device comprising the same. The organic electroluminescent material is a metal complex comprising a ligand L.sub.a having a structure of Formula 1A and a ligand L.sub.b having a structure of Formula 1B. Such new types of compound can be applied to an electroluminescent device to improve luminescence performance, efficiency or a lifetime of the device, exhibit more saturated luminescence and significantly improve overall performance of the device. Further provided are an electroluminescent device comprising the metal complex and a compound composition comprising the metal complex.

Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material includes a metal M and at least one C{circumflex over ( )}N bidentate ligand L.sub.a coordinated with the metal M, the maximum emission wavelength of the photoluminescence spectrum of the organic electroluminescent material at room temperature is greater than or equal to 410 nm and less than or equal to 700 nm, and the emission spectrum area ratio of the organic electroluminescent material is less than or equal to 0.145. The metal complex has significant advantages in organic electroluminescent devices, in particular the improvement of device efficiency. Further provided are an organic electroluminescent device including the metal complex and a compound composition including the metal complex.

Provided is an OLED having an anode, a cathode and an organic emissive layer disposed between the anode and the cathode. The emissive layer includes a first host; and a first emitter; wherein the first emitter is selected from the following group: (L.sup.1-L.sup.2).sub.nIr(L.sub.A).sub.3−n and (L.sub.B).sub.nIr(L.sup.3-L.sup.4).sub.3−n; wherein (L.sup.1-L.sup.2).sub.nIr(L.sub.A).sub.3−n is

##STR00001##

The invention relates to compounds comprising functional substituents in a specific spatial arrangement, devices containing same, and the preparation and use thereof.

The present disclosure provides an organic electroluminescent device including: an anode; a cathode; and one or more organic material layers interposed between the anode and cathode and selected from the group consisting of a hole injection layer, a hole transporting layer, a light emitting layer, an electron transporting layer, and an electron injection layer, and further including a lifetime enhancement layer (LEL) between the light emitting layer and the electron transporting layer.

New organometallic complexes having bis- or tris-heteroleptic ligands and large aspect ratio in one direction and their use in OLEDs to enhance the efficiency is disclosed.

One object of this invention is to provide a novel light-emitting device with low power consumption. The light-emitting device includes a first light-emitting element and a second light-emitting element. The first light-emitting element includes a first electrode, a second electrode, and a light-emitting layer. The second light-emitting element includes the first electrode, a third electrode, and the light-emitting layer. The second electrode comprises only a first conductive film, and the third electrode comprises a second conductive film and a third conductive film. The first electrode has a function of reflecting light. The second conductive film has functions of reflecting light and transmitting light. The first conductive film and the third conductive film each have a function of transmitting light.

Provided is a luminescent material having a polycyclic ligand. The luminescent material is a new metal complex having a polycyclic ligand and may be used as luminescent materials in electroluminescent devices. These new metal complexes achieve red light emission, have a very narrow full width at half maximum, and can achieve high saturation luminescence. In addition, these new metal complexes, when used as luminescent materials in electroluminescent devices, can achieve red light emission, have a very narrow full width at half maximum, achieve high saturation luminescence, reduce or maintain a low voltage, greatly improve device efficiency and lifetime, and provide better device performance. Further provided are an electroluminescent device and a compound composition.

Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.