The present disclosure relates to a plurality of host materials comprising at least one first host compound and at least one second host compound, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds according to the present disclosure as host materials, an organic electroluminescent device having a low driving voltage, high luminous efficiency, and long lifespan characteristics can be provided.

A compound for an organic optoelectronic device, a composition for an organic optoelectronic device including the same, an organic optoelectronic device, and a display device, the compound being represented by Chemical Formula 1:

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Disclosed is a compound including a ligand L.sub.A of Formula I

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where each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure including 5-membered and/or 6-membered carbocyclic or heterocyclic rings; where moiety B includes a structure of Formula II

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These compounds are useful as a component in the emissive layer of OLEDs.

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

The present disclosure belongs to the field of organic electroluminescent materials, and specifically relates to a nitrogen-containing compound, an electronic component using the nitrogen-containing compound and an electronic device using the nitrogen-containing compound. The nitrogen-containing compound has a structure as shown in Formula 1. When the nitrogen-containing compound of the present disclosure is used in an organic electroluminescent device, properties of the device can be effectively improved.

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Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the acceptor with an active layer of an OPV includes is a non-fullerene acceptor. Such non-fullerene acceptors may provide improved OPV performance characteristics such as improved power conversion efficiency, open circuit voltage, fill factor, short circuit current, and/or external quantum efficiency. One example of a non-fullerene acceptor is (4,4,10,10-tetrakis(4-hexylphenyl)-5,11-(2-ethylhexyloxy)-4,10-dihydro-dithienyl[1,2-b:4,5b′]benzodi-thiophene-2,8-diyl) bis(2-(3-oxo-2,3-dihydroinden-5,6-dichloro-1-ylidene) malononitrile.

Provided is a photodetector having a small dark current ratio. A photodetector includes a first electrode, a second electrode, and an active layer provided between the first electrode and the second electrode, the active layer contains a p-type semiconductor material and an n-type semiconductor material, the p-type semiconductor material contains a polymer having the highest occupied molecular orbital (HOMO) of −5.45 eV or less, and the n-type semiconductor material contains a non-fullerene compound. It is preferable that the polymer contained in the p-type semiconductor material contains a constitutional unit DU having an electron donating property and a constitutional unit AU having an electron accepting property, and the non-fullerene compound contains a moiety DP having an electron donating property and a moiety AP having an electron accepting property.

The present disclosure provides a nitrogen-containing compound, an electronic element, and an electronic device, and belongs to the technical field of organic materials. In the nitrogen-containing compound, 1-adamantyl and a cyano group are connected on a nitrogen-containing heteroaryl core structure by a linking group, so that the molecule has a high dipole moment as a whole, organic materials with a high electron mobility can be obtained, and the electron transport properties of the electronic element can be improved, and when the nitrogen-containing compound is used as an electron transport layer of an organic electroluminescent device, the luminous efficiency and service life of the device can be improved, and the operating voltage can be reduced.

The present disclosure relates to an organic compound. The organic compound has a structure as shown in the following formula (1), where R.sub.1 and R.sub.2 are the same as or different from each other, and are each independently substituted or unsubstituted alkyl with 1 to 4 carbon atoms, or substituted or unsubstituted phenyl; each Y is the same or different, and independently has a structure as shown in a formula (2); X.sub.1, X.sub.2, X.sub.3, X.sub.4, and X.sub.5 are the same or different, and are each independently C(R.sub.4) or N, and at least one of X.sub.1, X.sub.2, X.sub.3, X.sub.4, and X.sub.5 is N; m is selected from 1 or 2; and n is selected from 1 or 2. The organic compound of the present disclosure may be used as a hole blocking layer and/or an electron transport layer of an organic electroluminescent device.

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The present disclosure provides a composition for an organic optoelectronic device, an electronic component comprising the same, and an electronic device, belonging to the technical field of organic electroluminescence. The composition provided by the present disclosure includes a first compound and a second compound; and the first compound is represented by a Formula I and the second compound is represented by a Formula II:

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