A compound of Formula I,

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is disclosed. In Formula I, M is Pd or Pt; each of X.sup.1 to X.sup.12 is C or N; each of X.sup.13 and X.sup.14 is CH, CD or N; each of Z.sup.1, Z.sup.2, and Z.sup.3 is C or N; L.sup.1 is selected from a variety of bivalent linkers; X is selected from O, S, Se, NR′, and CR″R′″; each R, R′, R.sup.1, R.sup.2, R.sup.3, R.sup.A, R.sup.B, R.sup.C, R.sup.D, and R.sup.E is hydrogen or a General Substituent; at least one of Z.sup.1, Z.sup.2, and Z.sup.3 is a carbon atom substituted with a substituent with a molecular weight of at least 16. Formulations, OLEDs, and consumer products that include Formula I are also disclosed.

Disclosed herein are a novel organometallic compound and an organic light-emitting diode including same. More specifically, an organometallic compound represented by [Chemical Formula 1] and an organic light-emitting diode including same are provided.

The present invention relates to a novel polycyclic compound employed in an organic layer of an organoelectro luminescent device, wherein the organoelectro luminescent device employing the compound according to the present invention has remarkably improved luminous efficiency. According to the present invention, it is possible to implement a highly efficient organoelectro luminescent device that can be effectively applied to various display devices.

Provided is an organometallic complex including a ligand L.sub.A having a structure represented by one of the following formulas ##STR00001##
and coordiated to Ir.

A thermally activated, sensitized phosphorescence organic electroluminescence device includes a luminescent layer formed of a host material consisting of two materials, one being a hole transport material, and the other an electron transport material, at least one which is a thermally activated delayed fluorescence material. The host material is doped by a phosphorescent dye. The triplet state energy level of the CT excited state of the fluorescence material is higher than the triplet state energy level of the n-π excited state by 0 to 0.3 or the triplet state energy level of the CT excited state of the fluorescence material is higher than the triplet state energy level of the n-π excited state, wherein the difference is above 1.0 eV, and, a difference between the second triplet state energy level of its n-π excited state and the first singlet state energy level of its CT excited state is −0.1 to 0.1 eV.

The present disclosure relates to an organic light-emitting diode having a low driving voltage and long lifespan and more particularly, to an organic light-emitting diode, comprising a first electrode, a second electrode facing the first electrode, and a light-emitting layer interposed therebetween, wherein the light-emitting layer contains at least one of the amine compounds represented by the following Chemical Formula A or Chemical Formula B, plus the compound represented by Chemical Formula D. The structures of Chemical Formulas A, B, and D are the same as in the specification.

Organic compounds containing indolocarbazoles as electron donor connected with electron acceptors such aza-triphenylene or dibenzoquinoxaline that can improve the performance of phosphorescent organic light emitting devices are disclosed.

To provide an organic electroluminescent device in which energy efficiency is improved. An organic electroluminescent device includes a pair of electrode layers formed of an anode layer and a cathode layer, and a luminescent layer arranged between the pair of electrode layers, in which the luminescent layer includes a host material and a dopant material, and the dopant material is an anthracene-based compound represented by formula (1), and the luminescent layer further includes a polycyclic aromatic compound represented by formula (2) or a multimer of a polycyclic aromatic compound having a plurality of structures represented by formula (2). ##STR00001##

To provide an organic electroluminescent device in which energy efficiency is improved. An organic electroluminescent device includes a pair of electrode layers formed of an anode layer and a cathode layer, and a luminescent layer arranged between the pair of electrode layers, in which the luminescent layer includes a host material and a dopant material, and the dopant material is an anthracene-based compound represented by formula (1), and the luminescent layer further includes a polycyclic aromatic compound represented by formula (2) or a multimer of a polycyclic aromatic compound having a plurality of structures represented by formula (2). ##STR00001##

The present invention relates to a first and second organic semiconductor layer and an organic electronic device comprising the same, wherein the organic electronic device comprises an anode, a first organic semiconductor layer, a second organic semiconductor layer and a cathode; wherein a) the first organic semiconductor layer comprises: a metal dopant, and a compound of Formula (I); and b) the second organic semiconductor layer comprises at least one radialene compound.

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