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##

Provided is a light-emitting diode and a method for preparing the same. The light-emitting diode includes an anode, a hole transport layer, a perovskite light-emitting layer, an electron transport layer and a cathode stacked in sequence, in which the perovskite light-emitting layer includes a first sublayer and a second sublayer stacked in sequence, with a material for forming the first sublayer including an inorganic perovskite material, and with a material for forming the second sublayer being an organic perovskite material.

The present specification relates to an organic light emitting device.

The present specification relates to an organic light emitting device.

The present disclosure is related to an array substrate. The array substrate may include a base substrate and a pixel defining layer on the base substrate. The pixel defining layer may include a plurality of thickness thinning regions. The thickness thinning regions may have a smaller height than other areas of the pixel define layer on the base substrate. The plurality of the thickness thinning regions may be configured to guide flow of fillers to form an encapsulating layer on the pixel defining layer.

The present disclosure provides an oxygen heterocyclic compound, an application thereof, and an electronic device using the same. The oxygen heterocyclic compound has a structural formula as represented by following formula 1:

##STR00001##

The oxygen heterocyclic compound comprises an aromatic amine portion and an oxygen heterocyclic portion. The aromatic amine portion effectively promotes the hole injection and transport performance. The oxygen heterocyclic portion is conducive to the formation of molten evaporation materials.

A hole transport material, a manufacturing method thereof, and an electroluminescent device are provided. A main chain of a molecular structure of the hole transport material includes spiro aromatic amine, and a branch chain of the molecular structure of the hole transport material includes an aryl group or a heteroaryl group. The hole transport material can effectively improve performance of hole injection and hole transport, thereby balancing electrons and holes in electroluminescent devices and realizing relatively low voltage and relatively high efficiency.

The present disclosure provides an organic light emitting device comprising a hole injection layer including a cured product of a compound represented by the following Chemical Formula 1, and a hole transport layer including a polymer containing a repeating unit represented by the following Chemical Formula 2:

##STR00001## wherein all the variables a10-re described herein.

In order to realize a light-emitting element having high luminous efficiency in a light-emitting device with quantum dots, the light-emitting element including a hole transport layer and a light-emitting layer including a quantum dot luminescent body, the hole transport layer and the light-emitting layer being layered on each other is provided. The hole transport layer includes a compound of one or more of Cu.sup.+, Ag.sup.+, and Au.sup.+, and one or more of I.sup.−, SCN.sup.−, SeCN.sup.−, and CN.sup.−.

Provided are a composition for an organic optoelectronic device including a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, an organic optoelectronic device including the same, and a display device. Details of Chemical Formula 1 and Chemical Formula 2 are as defined in the specification.