Provided is an organometallic compound of Chemical Formula 1: ##STR00001## wherein, in Chemical Formula 1: X is O, S, NH, or Se; R.sub.1 is —Si(R.sub.a)(R.sub.b)(R.sub.c), where R.sub.a, R.sub.b, and R.sub.c are hydrogen, deuterium, or a substituted or unsubstituted C.sub.1-10 alkyl; R.sub.2, R.sub.3 and R.sub.4 are each independently hydrogen, deuterium, halogen, cyano, amino, a substituted or unsubstituted C.sub.1-60 alkyl, a substituted or unsubstituted C.sub.1-60 haloalkyl, a substituted or unsubstituted C.sub.1-60 alkoxy, a substituted or unsubstituted C.sub.1-60 haloalkoxy, a substituted or unsubstituted C.sub.3-60 cycloalkyl, a substituted or unsubstituted c.sub.2-60 alkenyl, a substituted or unsubstituted C.sub.6-60 aryl, a substituted or unsubstituted C.sub.6-60 aryloxy, or a substituted or unsubstituted C.sub.2-60 heterocyclic group containing one or more heteroatoms selected from the group consisting of N, O and S; a and b are each 0 and 1, or 1 and 0, respectively; and n is 1 or 2,
and an organic light emitting device including the same.

Disclosed are a compound for an organic optoelectronic device, an organic light emitting diode including the same, and a display device including the organic light emitting diode. The compound for an organic optoelectronic device represented by a combination of the following Chemical Formula 1 and Chemical Formula 2 provides an organic light emitting diode having life-span characteristics due to excellent electrochemical and thermal stability, and high luminous efficiency at a low driving voltage.

The present invention relates to a compound of the formula (I), (II) or (III), to the use of the compound in an electronic device, and to an electronic device comprising a compound of the formula (I), (II) or (III). The present invention furthermore relates to a process for the preparation of a compound of the formula (I), (II) or (III) and to a formulation comprising one or more compounds of the formula (I), (II) or (III).

The present invention relates to a compound for organic light-emitting diodes that can operate organic light-emitting diodes at a low driving voltage and an organic light-emitting diode comprising the same and, more particularly, to a compound for use as a fluorescent host in organic light-emitting diodes, which can bring about excellent diode properties by operating organic light-emitting diodes at a low driving voltage, and an organic light-emitting diode comprising the same.

The present invention relates to an organic electroluminescent device containing a mixture which comprises an electron-transporting host material and a hole-transporting host material, to a formulation comprising a mixture of the host materials and to a mixture comprising the host materials. The electron-transporting host material corresponds to a compound of the formula (1) from the class of compounds containing two triazine units. The hole-transporting host material corresponds to a compound of the formula (2) from the class of the biscarbazoles or derivatives thereof.

The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.

The present disclosure relates to a boron compound applicable to an organic light-emitting diode and an organic light-emitting diode comprising same. More specifically, the present disclosure relates to a boron compound represented by any one of Chemical Formulas A to D and an organic light-emitting diode comprising same, wherein Chemical Formulas A to D are as defined in the description.

The present invention relates to the preparation of a novel tetradentate platinum (II) complex and an application thereof, belonging to the field of OLED organic electroluminescent materials. The complex of the present invention has the following structural formula, and is used for a phosphorescent doping material having a photon emission effect in a light-emitting layer of an OLED luminescent device. The complex of the present invention has a high fluorescence quantum efficiency, a good heat stability and a low quenching constant, and can be used for the manufacture of a green light OLED device with a high luminous efficiency and low roll-off.

##STR00001##

A compound, Ir(L.sub.A).sub.m(L.sub.B).sub.3-m, having a structure of Formula I,

##STR00001##

is provided. In Formula I, each of moiety A and moiety C is independently a 5- or 6-membered ring or a polycyclic fused ring system comprising 5- or 6-membered rings; moiety B is a 5-membered heterocyclic ring; Z.sup.1, Z.sup.2, and Z.sup.3 are C or N; m is 1 or 2; at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 has a structure of Formula II,

##STR00002##

or is a 5-membered heterocyclic ring; each of X.sup.1, X.sup.2, X.sup.3, X.sup.4, and X.sup.5 is CR or N; each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.A, R.sup.B, R.sup.C, and R is hydrogen or a General Substituent; at least one of R.sup.1a, R.sup.2a, R.sup.3a, R.sup.4a, R.sup.5a is cycloalkyl, alkyl, silyl, germyl, deuterated variants thereof, fluorinated variants thereof, and combinations thereof. Formulations, OLEDs, and consumer products containing the compound are also provided.

An organic electroluminescence device includes: an anode; an emitting layer; and a cathode, the emitting layer containing a first material, a second material and a third material, the first material being a fluorescent material, the second material being a delayed fluorescent material, the third material having a singlet energy larger than a singlet energy of the second material.