An organometallic compound represented by Formula 1 emits deep blue light. A light-emitting device including the organometallic compound, and an electronic apparatus including the light-emitting device may have excellent or suitable driving voltage, luminescence efficiency, color conversion efficiency, and/or lifespan characteristics:

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In Formula 1, X.sub.1 to X.sub.4 are each independently C or N, Y.sub.11 is C(Z.sub.11) or N, and Y.sub.12 is C(Z.sub.12) or N.

Disclosed are a heterocyclic compound represented by Formula 1 and an organic light emitting device using the same. The heterocyclic compound is used as a material for hole injection layer, hole transport layer, hole injection and transport layer, light emission layer, electron transport layer, or electron injection layer of the organic light emitting device and provides improved efficiency, low driving voltage, and improved lifetime characteristic. ##STR00001##

The present invention relates to compounds of formula (1) which are suitable for use in electronic devices: ##STR00001##

Provided is an organic light emitting device, comprising: an anode; a cathode disposed opposite to the anode; and one or more organic material layers disposed between the anode and cathode, the organic material layer including a light emitting layer that includes a compound of Chemical Formula 1 and a compound Chemical Formula 2: ##STR00001## wherein: one of R.sub.21, R.sub.22, R.sub.23, and R.sub.24 is -L.sub.21-Ar.sub.1, and the remaining are hydrogen; and one of R.sub.31, R.sub.32, R.sub.33, and R.sub.34 is -L.sub.22-Ar.sub.2, and the remaining are hydrogen; excluding compounds where: R.sub.21 is -L.sub.21-Ar.sub.1 and R.sub.31 is -L.sub.22-Ar.sub.2, R.sub.22 is -L.sub.21-Ar.sub.1 and R.sub.32 is -L.sub.22-Ar.sub.2, R.sub.23 is -L.sub.21-Ar.sub.1 and R.sub.33 is -L.sub.22-Ar.sub.2, or R.sub.24 is -L.sub.21-Ar.sub.1 and R.sub.34 is -L.sub.22Ar.sub.2; L.sub.21 and L.sub.22 each is a single bond, or a substituted or unsubstituted C.sub.6-60 arylene; X.sub.2 is O or S; and Ar.sub.1 is Chemical Formula 3: ##STR00002##

The present invention relates to compounds, which are suitable for use in electronic devices, and to electronic devices, in particular organic electroluminescent devices, containing said compounds.

The present invention relates to compounds suitable for use in electronic devices, and to electronic devices, especially organic electroluminescent devices, comprising these compounds.

An organic EL device is provided, including at least an anode, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode in this order, wherein the hole transport layer contains an arylamine compound represented by the following formula (1), wherein Ar.sub.1 to Ar.sub.8 and n1 are defined in the specification, and the electron transport layer contains a compound having a benzoazole ring structure represented by the following formula (2), wherein Ar.sub.9, Ar.sub.10, X, Y.sub.1, Z.sub.1 and Z.sub.2 are defined in the specification. ##STR00001## ##STR00002##

The present specification relates to an organic light emitting device.

An organic electroluminescence device including: an anode, a cathode, and at least one emitting layer between the cathode and the anode, wherein the emitting layer contains a first host material, a second host material, and a dopant material, the first host material is a compound having at least one deuterium atom, and the emitting layer contains the first host material in the proportion of 1% by mass or more.

A heterocyclic compound represented by Chemical Formula 1 and an organic light emitting device including the same, and the heterocyclic compound which is used as a material of an organic material layer of the organic light emitting device and provides improved efficiency, low driving voltage and improved lifetime characteristics of the organic light emitting device.

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