In various exemplary embodiments, an optoelectronic component device is provided. The optoelectronic component device includes a first organic light emitting diode and a second organic light emitting diode, which are connected to one another in physical contact one above the other. The first organic light emitting diode is electrically connected in parallel with the second organic light emitting diode. The first organic light emitting diode and the second organic light emitting diode have at least an approximately identical or identical electronic diode characteristic and/or an approximately identical or identical electronic diode characteristic variable.

Boron and nitrogen containing heterocyclic compounds are disclosed, which can be used as emitters, hosts, charge blocking materials, charge transporting materials, etc. in an electroluminescent device. These novel compounds can offer very narrow emissive spectrum, and obtain high saturated deep blue emission. Also disclosed are an organic light-emitting device and a formulation.

An organic compound with characteristics excelling in hole-injecting/transporting performance and having an electron blocking ability, a highly stable thin-film state, and excellent heat resistance is provided as material for an organic electroluminescent device of high efficiency and high durability, and the organic electroluminescent device of high efficiency and high durability is provided using this compound. The compound of a general formula (Chemical Formula 1) having a substituted acridan ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes and one or more organic layers sandwiched between the pair of electrodes. ##STR00001##

Disclosed are a compound for an organic optoelectronic device, an organic light emitting diode including the same, and a display device including the organic light emitting diode. The compound for an organic optoelectronic device represented by a combination of the following Chemical Formula 1 and Chemical Formula 2 provides an organic light emitting diode having life-span characteristics due to excellent electrochemical and thermal stability, and high luminous efficiency at a low driving voltage.

OLED materials having the formula: T-A(-S-B(-P-B)m-S-A)n-T where A are independently selected rod-shaped, rigid molecular core units, S are independently selected flexible spacer units, B are polymerisable crosslinking groups independently selected, P are spacer groups independently selected, T are independently selected end groups, m are independently selected from values of from 1 to 4, n is equal to I to 3.

The present disclosure provides a display panel and a manufacturing method of the display panel, the display panel includes a base substrate, a pixel definition layer, and a color conversion medium; the pixel definition layer and the color conversion medium are successively formed on the base substrate; a pixel opening is defined on the pixel definition layer, the color conversion medium is positioned in the pixel opening; the color conversion medium includes a perovskite color conversion functional layer and a first water-oxygen barrier layer; the first water-oxygen barrier layer is positioned on a side of the perovskite color conversion functional layer away from the base substrate.

A light-emitting element that includes a fluorescent material and has a high emission efficiency is provided. A light-emitting element in which a delayed fluorescence component due to TTA accounts for a high proportion of emissive components is provided. A novel light-emitting device with a high emission efficiency and a low power consumption is provided. A light-emitting element includes an anode, a cathode, and an EL layer. The EL layer includes a light-emitting layer including a host material and an electron-transport layer including a first material in contact with the light-emitting layer. The LUMO level of the first material is lower than that of the host material. The proportion of a delayed fluorescence component due to TTA is greater than or equal to 10 percent of the light emission from the EL layer. The proportion of the delayed fluorescence component due to TTA may be greater than or equal to 15 percent of the light emission.

A compound of formula (7) is provided

##STR00001## wherein L.sub.4 is a linking group selected from the group consisting of:

##STR00002## provided that an asterisk (*) indicates the position bonding to the nitrogen atom of the carbazolyl group, R.sub.6 to R.sub.13 are independently a hydrogen atom, or a phenyl group, Ar.sub.17 is an unsubstituted phenylphenyl group, and Ar.sub.18 is a phenylphenyl group which may be substituted by a phenyl group or a naphthyl group, or a phenyl group which may be substituted by a naphthyl group.

A display apparatus includes: a substrate including an opening area, a display area, and a non-display area, the display area surrounding the opening area, and the non-display area being between the opening area and the display area; and a display element in the display area and including a first electrode, an emission layer, and a second electrode that are sequentially stacked, wherein the second electrode extends from the display area to the non-display area and includes a second electrode hole defined by an edge of the second electrode that faces and surrounds the opening area, and a first distance from a center of the opening area to a first portion of the edge of the second electrode is different from a second distance from the center of the opening area to a second portion of the edge of the second electrode.

The present disclosure provides a display panel and a manufacturing method of the display panel, the display panel includes a base substrate, a pixel definition layer, and a color conversion medium; the pixel definition layer and the color conversion medium are successively formed on the base substrate; a pixel opening is defined on the pixel definition layer, the color conversion medium is positioned in the pixel opening; the color conversion medium includes a perovskite color conversion functional layer and a first water-oxygen barrier layer; the first water-oxygen barrier layer is positioned on a side of the perovskite color conversion functional layer away from the base substrate.