Provided are a light-emitting device including a heterocyclic compound and an electronic apparatus including the light-emitting device. The light-emitting device includes: a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode and including an emission layer, and the emission layer includes at least one heterocyclic compound represented by Formula 1.

An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer. The emission layer includes at least one heterocyclic compound of Formula 1. The heterocyclic compound may be a host or a delayed fluorescent dopant. The organic light-emitting device including the heterocyclic compound may have a low driving voltage, high efficiency, high luminance, and a long lifespan.

The present invention relates to 5,6-diphenyl-5,6-dihydrodibenz[c,e][1,2]azaphosphorin and 6-phenyl-6H-dibenzo[c,e][1,2]thiazine 5,5-dioxide derivatives and similar compounds of the formula (1) as organic electroluminescent materials for use in organic electroluminescent devices, for example in organic light-emitting diodes (OLEDs), where the symbols used are as follows: Z is the same or different at each instance and is PAr.sup.2 or S(═O); E is the same or different at each instance and is O or S when the symbol Z to which this E binds is PAr.sup.2, and O when the symbol Z to which this E binds is S(═O); L is selected from the group consisting of a single bond, NAr.sup.2, O, S, S(═O).sub.2, P(═O)Ar.sup.2, —X═X— and —C(═O)—NAr.sup.2; the rest of the symbols are defined in the claims. The present invention discloses synthesis examples of inventive compounds, productions of OLEDs containing these example compounds, and results for these electroluminescent devices.

Disclosed are a novel organic electroluminescent material and a device thereof. Such a novel organic electroluminescent material has a structure of Formula 1, and when applied to the organic electroluminescent device, can improve the balance of electrons and holes in the organic electroluminescent device and thus bring excellent device effects such as the improvement of external quantum efficiency, current efficiency, and service life. The novel organic electroluminescent material can be used to prepare organic semiconductor devices and is suitable for different types of organic semiconductor devices, including but not limited to fluorescent OLEDs, phosphorescent OLEDs, white OLEDs, laminated OLEDs, OTFTs, OPVs, etc. Further disclosed are an electroluminescent device comprising the organic electroluminescent material and a compound formulation comprising the organic electroluminescent material.

Provided is a compound of Chemical Formula 1:

##STR00001## wherein: each X is independently N or CH, provided that at least one X is N; Ar.sub.1 and Ar.sub.2 are each independently a substituted or unsubstituted C.sub.6-60 aryl or a substituted or unsubstituted C.sub.5-60 heteroaryl containing one or more of N, O and S; Ar.sub.3 is a substituted or unsubstituted C.sub.5-60 heteroaryl containing at least one N; D is a substituent of any one of the following Chemical Formulas 2-1 to 2-3:

##STR00002## wherein: Y.sub.1 is O, S, NR.sub.2, or CR.sub.3R.sub.4; n is an integer of 0 to 10; each R.sub.1 is independently hydrogen, deuterium, or a substituted or unsubstituted: C.sub.1-60 alkyl, C.sub.3-60 cycloalkyl, C.sub.6-60 aryl, or C.sub.5-60 heteroaryl containing one or more of N, O and S; and R.sub.2 to R.sub.4 are each independently a substituted or unsubstituted C.sub.1-60 alkyl or a substituted or unsubstituted C.sub.6-60 aryl,
and an organic light emitting device comprising the same.

The present specification relates to a compound of Chemical Formula 1, a coating composition including the compound of Chemical Formula 1, an organic light emitting device using the same, and a method for manufacturing the same.

An organic electroluminescence device exhibiting high light emission efficiency is provided, which includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer may include a compound represented by Formula 1.

##STR00001##

The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the host materials according to the present disclosure, an organic electroluminescent device having a high power efficiency and/or long lifespan can be provided.

Provided is an organic compound represented by the general formula [1]: ##STR00001## in the formula [1], R.sub.1 to R.sub.18 each represent a hydrogen atom, an alkyl group having 1 or more and 8 or less carbon atoms, an aromatic hydrocarbon group having 6 or more and 18 or less carbon atoms, or an aromatic heterocyclic group having 3 or more and 15 or less carbon atoms, and may be identical to or different from each other, and the plurality of R.sub.17's or the plurality of R.sub.18's may be identical to or different from each other, and the R.sub.1 to the R.sub.18 may each further have a substituent selected from a halogen atom and an alkyl group having 1 or more and 8 or less carbon atoms, and n represents an integer of 1 or more and 3 or less.

A photoelectric conversion device includes a first electrode and a second electrode and a photoelectric conversion layer between the first electrode and the second electrode. The photoelectric conversion layer includes a first material and a second material, the first material and the second material being configured to form a pn junction, and a third material different from the first material and the second material. The third material includes an electron withdrawing group.