An organic electroluminescence device of one or more embodiments 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 emission layer includes a polycyclic compound represented by Formula 1, thereby showing high emission efficiency:

##STR00001##

wherein Y is O or S.

An organic electroluminescence device of one or more embodiments 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 emission layer includes a polycyclic compound represented by Formula 1, thereby showing high emission efficiency:

##STR00001##

wherein at least one of n1 to n6 is 1.

The present disclosure relates to the technical field of display, and specifically relates to an organic electroluminescent device, and in particular, to a highly efficient fluorescence device. An organic electroluminescent device includes a hole transport layer, and a light-emitting layer. The hole transport layer and the light-emitting layer has an interface exciplex formed at an interface therebetween.

An active material for organic image sensors, where the active material is a squaraine-based active material or a thiophene-based active material. A photoelectric conversion layer containing the active material, which is a squaraine-based active material or a thiophene-based active material. An organic image sensor containing the photoelectric conversion layer containing the active material.

A photoelectric conversion module includes photoelectric conversion elements electrically coupled. The photoelectric conversion elements each sequentially include first electrode, photoelectric conversion layer, and second electrode. The photoelectric conversion module includes first photoelectric conversion element, second photoelectric conversion element, coupling portion to couple the first and second photoelectric conversion elements in series, first partition portion, and second partition portion. The first electrode or the second electrode forming the first photoelectric conversion element includes a contact region in contact with the coupling portion. A value of X/(Y−X) is 0.3 or greater, where X denotes a length of the contact region and Y denotes a predetermined length in the coupling direction around the contact region.

Provided is an organic electroluminescence device including 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. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode, the first hole transport layer including a first organic compound having a first dielectric constant and a second hole transport layer disposed between the first hole transport layer and the emission layer, the second hole transport layer including a second organic having a second dielectric constant which is greater than the first dielectric constant.

The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. The organic electroluminescent device of the present disclosure can exhibit excellent lifespan characteristics while maintaining high luminous efficiency by including a specific combination of a plurality of host compounds.

SUMMARY

The invention relates to a light emitting organic molecule, in particular for the application in optoelectronic devices. According to the invention, the organic molecule has one first chemical moiety with a structure of Formula I,

##STR00001## and two second chemical moieties with a structure of Formula II,

##STR00002## wherein # represents the binding site of a single bond linking the first chemical moiety to the second chemical moiety; exactly one substituent selected from the group consisting of W, X, and Y is cyanophenyl; exactly one substituent selected from the group consisting of T, V and W represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties; exactly one substituent selected from the group consisting of W′, X′, and Y′ is cyanophenyl; exactly one substituent selected from the group consisting of T′, V′ and W′ represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties; and exactly one substituent selected from the group consisting of R.sup.11, R.sup.12, R.sup.13, R.sup.14, and R.sup.15 is cyanophenyl.

A light emitting device includes a first electrode, a hole transporting layer in contact with the first electrode, a second electrode, an electron transporting layer in contact with the second electrode; and an emissive layer between the hole transporting layer and the electron transporting layer. The emissive layer includes a metal-assisted delayed fluorescent (MADF) emitter, a fluorescent emitter, and a host, and the MADF emitter harvests electrogenerated excitons and transfers energy to the fluorescent emitter.

An object is to provide an azoline ring-containing compound which achieves characteristics required for an organic EL element, such as a driving voltage, a quantum efficiency, and element lifetime in a well-balanced manner, and particularly can obtain a high quantum efficiency, for example, in a case where the azoline ring-containing compound is used for the organic EL element. The above object is achieved by an azoline ring-containing compound represented by the following general formula (1). ##STR00001## In formula (1), φ represents an m-valent group derived from an aromatic hydrocarbon having 6 to 40 carbon atoms or the like, Y represents —O—, —S—, or >N—Ar, R.sup.1 to R.sup.5 each represent a hydrogen atom or an alkyl having 1 to 4 carbon atoms, and L represents a phenylene group or the like.