An organic electroluminescence device comprising: an anode, a cathode, and an emitting region between the anode and the cathode, wherein the emitting region comprises a first emitting layer and a second emitting layer, the first emitting layer and the second emitting layer are directly adjacent to each other, the first emitting layer is between the anode and the second emitting layer, and one of the first emitting layer and the second emitting layer comprises a compound having at least one deuterium atom.

The present specification relates to an organic light emitting device including Compound (A) represented by Chemical Formula 1 and Compound (B) represented by any one of Chemical Formulae 2 to 4.

The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to organic electroluminescent devices which comprise these compounds.

The present application relates to a compound of a formula (I) or (II), to the use thereof in electronic devices, to processes for preparing the compound, and electronic devices comprising the compound.

A thermoelectric conversion material containing an electrically conductive material (A) and an organic compound (B) that are in a relationship satisfying the following formula (1): 0 eV≤|(HOMO of the organic compound (B))−(HOMO of the electrically conductive material (A))|≤1.64 eV.

A light-emitting device and an electronic apparatus including the light-emitting device include a novel condensed cyclic compound represented by Formula 1, in which Z.sub.1 is a group represented by Formula 2. The condensed cyclic compound represented by Formula 1 may have a high glass transition temperature (Tg) and/or a high melting point, and may thus provide high durability during storage and driving.

##STR00001##

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, 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##