A compound having structures represented by the following formulas (1) or (2): wherein in the formulas (1) and (2), at least one of R.sub.1 to R.sub.8 is a deuterium atom.

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An organic-EL-display device includes a blue-emitting-organic-EL-device and a red-emitting-organic-EL-device as pixels, in which each of the blue-emitting-organic and the red-emitting-organic-EL-device includes a light-reflection layer, transparent electrode, hole transporting zone, emitting layer, electron transporting zone and semitransmissive electrode in this order, the blue-emitting-organic-EL-device has a blue-emitting layer containing a fluorescent-compound FLB, the red-emitting-organic-EL-device has a red-emitting layer containing a delayed fluorescent compound DFR, the hole transporting zone is provided at a constant film-thickness in a shared manner across the blue-emitting and red-emitting organic EL devices, the red-emitting-organic-EL-device has a resonator structure whose order of interference is first-order between the light reflection layer and the semitransmissive electrode, a film-thickness of the red-emitting layer is less than 50 nm, and a sum of film-thicknesses of the transparent electrode and hole transporting zone in the blue-emitting and red-emitting organic EL devices is less than 40 nm.

The present application provides a nitrogen-containing compounds represented by formula I-A, electronic elements and electronic devices. The application relates to the field of organic material. The nitrogen-containing compounds can improve the performance of electronic elements.

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An organic electroluminescence device includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the hole transport region includes a polycyclic compound represented by Formula 1, and the device shows high emission efficiency:

##STR00001##

An organic electroluminescence device includes an anode, a cathode, an emitting layer between the anode and the cathode, and a first hole transporting layer between the anode and the emitting layer, in which the first hole transporting layer is directly adjacent to the emitting layer, the first hole transporting layer contains a first compound represented by formula (1) below, and the first compound has at least one group represented by formula (11) below.

##STR00001##

The present specification provides a heterocyclic compound represented by Chemical Formula 1, an organic light emitting device comprising the same, a composition for an organic material layer of an organic light emitting device, and a method for manufacturing an organic light emitting device.

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 electronic devices which comprise these compounds.

The present invention relates to a process to produce compounds of the formula (1) which are suitable for use in electronic devices, as well as to intermediate compounds of formula (Int-1) and compounds of formula (1-1) and (1-2) obtained via the process. These compounds are particularly suitable for use organic electroluminescent devices. The present invention also relate to electronic devices, which comprise these compounds.

The present invention relates to compounds that include a nitrogen heteroatom, including a compound of the formula (I). Also provided herein is an organic electronic device comprising the compound and a display device or lighting device comprising the organic electronic device.

The present application relates to the technical field of organic materials, and provides a nitrogen-containing compound, an electronic element and an electronic apparatus. The structure of the nitrogen-containing compound is shown as Chemical formula 1. The nitrogen-containing compound can improve the performance of the electronic element. Ar is II, and X is selected from O or S; L.sub.1 is III, and in L.sub.1, “#” represents a connection point between the phenylene of L.sub.1 and N, and “##” represents a connection point between the phenylene of L.sub.1 and IV; L.sub.2 is V, and in L.sub.2, “#” represents a connection point between the phenylene of L.sub.2 and N, and “##” represents a connection point between the phenylene of L.sub.2 and R.sub.4. ##STR00001##