Provided are compounds of Formula I ##STR00001##
that are useful as emitters in OLEDs.

Novel host compounds consisting of carbazole and nitrile groups are disclosed. These compounds are useful in phosphorescent OLEDs.

An organic electroluminescent compound and an organic electroluminescent device comprising the same provide an organic electroluminescent device having low driving voltage and/or excellent power efficiency and/or improved driving lifespan.

An organic electroluminescence device is provided and including a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the emission layer may include an organometallic compound, thereby exhibiting high luminous efficiency and long service life characteristics.

Provided are transition metal compounds having 1,2,3-triazine. Also provided are formulations comprising these transition metal compounds having 1,2,3-triazine. Further provided are OLEDs and related consumer products that utilize these transition metal compounds having 1,2,3-triazine.

Provided is a compound of Chemical Formula 1: ##STR00001## wherein: each X is independently N or CH, provided that at least one X is N; Ar.sub.1 and Ar.sub.2 are each independently a substituted or unsubstituted C.sub.6-60 aryl or a substituted or unsubstituted C.sub.5-60 heteroaryl containing one or more of N, O and S; Ar.sub.3 is a substituted or unsubstituted C.sub.5-60 heteroaryl containing at least one N; D is a substituent of any one of the following Chemical Formulas 2-1 to 2-3: ##STR00002## wherein: Y.sub.1 is O, S, NR.sub.2, or CR.sub.3R.sub.4; n is an integer of 0 to 10; each R.sub.1 is independently hydrogen, deuterium, or a substituted or unsubstituted: C.sub.1-60 alkyl, C.sub.3-60 cycloalkyl, C.sub.6-60 aryl, or C.sub.5-60 heteroaryl containing one or more of N, O and S; and R.sub.2 to R.sub.4 are each independently a substituted or unsubstituted C.sub.1-60 alkyl or a substituted or unsubstituted C.sub.6-60 aryl,
and an organic light emitting device comprising the same.

The present disclosure relates to an organic light emitting device that includes a substrate; and an organic light emitting diode positioned on the substrate and including a first electrode; a second electrode facing the first electrode; and a first emitting material layer including a first host of an anthracene derivative and a first dopant of a boron derivative and positioned between the first and second electrodes, wherein an anthracene core of the first host is deuterated.

Provided are a compound for improving the luminous efficiency, stability, and lifespan of an organic electronic element, an organic electronic element employing the compound, and an electronic device thereof.

The present invention relates in part to compounds containing indolocarbazole and terphenyl building blocks. These compounds are useful for application in organic electroluminescent devices wherein the combination of indolocarbazoles with terphenyl groups leads to novel compounds that demonstrate superior device performance.

A compound for an organic optoelectronic device, a composition for an organic optoelectronic device including the same, an organic optoelectronic device, and a display device, the compound being represented by a combination of Chemical Formula 1 and Chemical Formula 2: ##STR00001##