Provided is a light-emitting material having a polycyclic ligand. The light-emitting material is a novel metal complex comprising a polycyclic ligand having a structure of Formula 1 and may be used as light-emitting material in an electroluminescent device. These novel metal complexes can greatly red-shift the maximum emission wavelengths of electroluminescent devices and significantly adjust emitting colors of the devices and have very narrow emission spectra and can greatly improve the luminescence saturation of the devices and provide better device performance. Further provided are an electroluminescent device and a compound combination.

Provided is an electroluminescent device. The organic electroluminescent device comprises an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer comprises a first compound having a structure of H-L.sub.1-E and a second compound having a general formula of M(L.sub.a).sub.m(L.sub.b).sub.n(L.sub.c).sub.q, and the device has at least one maximum emission wavelength greater than 630 nm. Such a new material composition consisting of the first compound and the second compound can be used in a light-emitting layer of the electroluminescent device. The new material composition can achieve the emission of deep red light in the device, significantly reduce a drive voltage of the device while significantly improving device efficiency and/or a device lifetime, and provide better device performance. Further provided is a display assembly.

Compounds of Formula I,

##STR00001##

and Formula IIa,

##STR00002##

Formula IIb,

##STR00003##

are provided. In these structures, M is Pt or Pd; each of X.sup.1 to X.sup.6, X.sup.9 to X.sup.12, and Z.sup.1 to Z.sup.3 is C or N; each of L.sup.1, L.sup.2, L.sup.3, and L.sup.4 is a direct bond or a linker; at least three of L.sup.1, L.sup.2, L.sup.3, and L.sup.4 are present; each K.sup.1, K.sup.2, and K.sup.3 is a bond, O, or S; when Z.sup.1 is N, ring A in Formula I is not a pyridine or pyrazole; L.sup.5 is a bond or an organic linker; Y is selected from the group consisting of amino, alkoxy, aryloxy, or SiR.sup.1R.sup.2R.sup.3; when Y is SiR.sup.1R.sup.2R.sup.3, L.sup.2 is not BR. Devices, consumer products, and formulations containing these compounds are also disclosed.

A light-emitting device and an electronic apparatus (including the light-emitting device) are provided. The light-emitting device includes a first compound represented by Formula 1 and a second compound represented by Formula 2:

##STR00001##

wherein detailed descriptions of Formula 1 and Formula 2 are the same as described in the present specification.

Provided are a film including a coordination compound and a light-emitting device including the film, wherein the coordination compound has a novel structure in which a ligand including an electron donor atom is coordinated to a boron atom in a heterocyclic compound.

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

Highly thermal and photo-stable inorganic-organic hybrid phosphor compounds, in which a copper (I) halide module is coordinated with a multi-dentate organic ligand. Also disclosed are semiconductor and light emitting devices comprising these materials, including light emitting diodes, and methods of preparing these materials and devices.

A novel light-emitting element material is provided. Alternatively, a light-emitting element material capable of simplifying a process for manufacturing a light-emitting element is provided. Alternatively, a light-emitting element material capable of reducing the cost for manufacturing a light-emitting element is provided. Alternatively, one embodiment of the present invention provides a light-emitting element material capable of achieving a light-emitting element having favorable emission efficiency. A light-emitting element material including an organic compound which includes a first skeleton having a carrier-transport property and a second skeleton having a light-emitting property in one molecule and in which the molecular weight is less than or equal to 3000, is provided.

An organic light-emitting device includes a first electrode layer, an emission layer, an electron transporting layer, an electron injection layer, and a second electrode layer sequentially formed from bottom to top. The emission layer includes a guest light-emitting material, a first phenyl phosphine oxide derivative and a hole transporting material. The electron transporting layer includes a second phenyl phosphine oxide derivative and a third phenyl phosphine oxide derivative different from the second phenyl phosphine oxide derivative. One of the second phenyl phosphine oxide derivative and the third phenyl phosphine oxide derivative is identical to the first phenyl phosphine oxide derivative. The electron injection layer includes an alkaline metal compound.

Provided is a heterocyclic compound of Formula 1: ##STR00001## and an organic light emitting device comprising the same.