An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer includes, as a first host material, a first compound that includes at least one group represented by a formula (11) below, the first compound being represented by a formula (1) below, the second emitting layer includes a second compound represented by a formula (2A) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

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An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains a first compound represented by a formula (101) below as a first host material, the second emitting layer contains a second compound represented by a formula (2) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

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An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains a first compound represented by a formula (101) below as a first host material, the second emitting layer contains a second compound represented by a formula (2) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

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Provided is an organic light emitting device comprising a light emitting layer comprising a compound of Chemical Formula 1 and a compound of Chemical Formula 2:

##STR00001## wherein: Ar.sub.1, Ar.sub.2, Ar.sub.4 and Ar.sub.5 are each independently a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing N, O or S; Ar.sub.3 is hydrogen, or a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing N, O or S; L.sub.1 to L.sub.3 are each independently a single bond or a substituted or unsubstituted C.sub.6-60 arylene; L.sub.4 to L.sub.6 are each independently a single bond or a substituted or unsubstituted C.sub.6-60 arylene or C.sub.2-60 heteroarylene containing N, O or S; L.sub.7 is a substituted or unsubstituted C.sub.6-60 arylene; R.sub.1 is hydrogen, deuterium, or a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing one or of N, O and S; a is 0 to 7.

Provided is an organic light emitting device comprising a light emitting layer comprising a compound of Chemical Formula 1 and a compound of Chemical Formula 2:

##STR00001## wherein: Ar.sub.1, Ar.sub.2, Ar.sub.4 and Ar.sub.5 are each independently a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing N, O or S; Ar.sub.3 is hydrogen, or a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing N, O or S; L.sub.1 to L.sub.3 are each independently a single bond or a substituted or unsubstituted C.sub.6-60 arylene; L.sub.4 to L.sub.6 are each independently a single bond or a substituted or unsubstituted C.sub.6-60 arylene or C.sub.2-60 heteroarylene containing N, O or S; L.sub.7 is a substituted or unsubstituted C.sub.6-60 arylene; R.sub.1 is hydrogen, deuterium, or a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing one or of N, O and S; a is 0 to 7.

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the interlayer includes a heterocyclic compound of Formula 1:

A.sub.1B.sub.1].sub.n1  Formula 1

wherein, in Formula 1, the variables are defined herein.

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the interlayer includes a heterocyclic compound of Formula 1:

A.sub.1B.sub.1].sub.n1  Formula 1

wherein, in Formula 1, the variables are defined herein.

Provided is the nitrogen-containing compound shown in Chemical formula 1, an organic electroluminescent device, and an electronic apparatus, relating to the technical field of organic materials. The nitrogen-containing compound can improve the performance of the organic electroluminescent device. ##STR00001##

Provided is the nitrogen-containing compound shown in Chemical formula 1, an organic electroluminescent device, and an electronic apparatus, relating to the technical field of organic materials. The nitrogen-containing compound can improve the performance of the organic electroluminescent device. ##STR00001##

Specific polycyclic compounds, a material for an organic electroluminescence device comprising said specific polycyclic compound, an organic electroluminescence device comprising said specific polycyclic compound, an electronic equipment comprising said organic electroluminescence device, a process for preparing said polycyclic compounds, and the use of said polycyclic compounds in an organic electroluminescence. (Formula I) (I)

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