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

A compound is represented by a formula (20) below. In the formula (20), a least one pair of a pair of X.sub.21 and X.sub.22, a pair of X.sub.22 and X.sub.23 and a pair of X.sub.23 and X.sub.24 are carbon atoms to be bonded to the structure represented by the formula (20a), ##STR00001##

The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure, it is possible to produce an organic electroluminescent device having improved driving voltage, power efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

An organic light emitting device including, in sequence, a first electrode, a first charge transport layer, a second charge transport layer in contact with the first charge transport layer, a light emitting layer in contact with the second charge transport layer, and a second electrode, wherein the first charge transport layer includes a first material and a second material, the second charge transport layer includes the second material and a third material, and the light emitting layer includes the third material and a fourth material.

An organic electroluminescence device having RGB pixel areas, wherein optical compensation layers (10, 11) are respectively arranged between the red light emitting layer (4) and the first organic functional layer (12) as well as between the green light emitting layer (5) and the first organic functional layer (12), the optical compensation layers (10, 11) are made of a first hole transport material and a second hole transport material, the first hole transport material has a triplet-state energy level≧2.48 eV and a HOMO energy level≦−5.5 eV, the second hole transport material has a HOMO energy level≧−5.5 eV, and the difference between the HOMO energy level of the first hole transport material and the HOMO energy level of the second hole transport material is ≦0.2 eV. Its preparation process is simple, and it can significantly reduce power consumption of the light-emitting device so as to increase light-emitting efficiency.

An organic electroluminescence device including a cathode, an anode, and one or two or more organic layers arranged between the cathode and the anode, wherein at least one layer of the one or two or more organic layers includes a first component and a second component, the first component is a compound represented by the following formula (1), the second component is selected from the group consisting of an alkali metal, an alkali metal compound, an alkaline earth metal, an alkaline earth metal compound, a rare earth metal, a rare earth metal compound, an organic metal complex containing an alkali metal, an organic metal complex containing an alkaline earth metal, and an organic metal complex containing a rare earth metal.

##STR00001##

The present specification provides a compound having a spiro structure of Chemical Formula 1, and an organic light emitting device including the same.

An aromatic heterocyclic derivative is represented by a formula (1) below. ##STR00001##
In the formula (1), X.sub.1 to X.sub.3 each are a nitrogen atom or CR.sub.1, with a proviso that at least one of X.sub.1 to X.sub.3 is a nitrogen atom. A is represented by a formula (2) and B is represented by a formula (4) below. ##STR00002##

An organic compound is represented by Formula 1. ##STR00001##
where X.sub.1, X.sub.2, L, A.sub.1, A.sub.2, R1, R.sub.2, R.sub.3, R.sub.4, and Het are as defined in the specification.

Provided are compounds comprising at least four six-membered rings wherein two atoms of each of these four six-membered rings are connected to form an at least eight membered ring and a further ligand which is connected to the at least eight-membered ring via a linker. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.