The present specification relates to a spiro structure compound and an organic light emitting device including the same.

Provided is a novel chalcogen-containing organic semiconductor compound having excellent carrier mobility. The compound is represented by Formula (1a) or (1b): [Chem. 1] where in Formulas (1a) and (1b), X represents S, O, or Se, and R.sup.1 each independently represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, a pyridyl group, a furyl group, a thienyl group, or a thiazolyl group.

Provided is a novel chalcogen-containing organic semiconductor compound having excellent carrier mobility. The compound is represented by Formula (1a) or (1b): [Chem. 1] where in Formulas (1a) and (1b), X represents S, O, or Se, and R.sup.1 each independently represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, a pyridyl group, a furyl group, a thienyl group, or a thiazolyl group.

The present invention relates to compounds of the formula (1) and (2) which are suitable for use in electro¬nic devices, in particular organic electroluminescent devices.

The present invention relates to compounds of the formula (1) and (2) which are suitable for use in electro¬nic devices, in particular organic electroluminescent devices.

Provided are a monoamine compound and an organic electroluminescence device including the same. The monoamine compound according to an example embodiment is represented by the following Formula 1

##STR00001##

Provided are a monoamine compound and an organic electroluminescence device including the same. The monoamine compound according to an example embodiment is represented by the following Formula 1

##STR00001##

The present disclosure provides a compound having a formula (I):

##STR00001##

wherein C.sub.y represents substituted or unsubstituted C5-C40 aryl; X represents oxygen atom or sulfur atom; L.sub.1 is selected from substituted or unsubstituted C5-C40 aryl, or substituted or unsubstituted C3-C40 heteroaryl; A includes a structure represented by formula (II):

##STR00002##

wherein each of L.sub.2 and L.sub.3 is independently selected from substituted or unsubstituted C5-C40 aryl, or substituted or unsubstituted C3-C40 heteroaryl; each of Ar.sub.1, Ar.sub.2, and Ar.sub.3 is independently selected from substituted or unsubstituted C5-C40 aryl, substituted or unsubstituted C3-C40 heteroaryl, or substituted or unsubstituted arylamine containing one or two nitrogen atoms; each of m, q, and r is independently selected from 0 or 1; and * indicates a connection position.

The present invention provides a curable composition containing a compound represented by General Formula A and a compound represented by General Formula B.

ArL-Sp-Pol).sub.n  (General Formula A)

In General Formula A, Ar represents an n-valent group containing a nitrogen-containing fused aromatic ring as a partial structure; L represents a linking group such as —O— and —C(═O)O—; Sp represents a single bond or a divalent linking group; Pol represents a hydrogen atom or a polymerizable group; n represents 1 or 2; and the compound represented by General Formula A has at least one polymerizable group.

##STR00001##

In General Formula B, R′, R″, and R′″ are each independently a hydrogen atom or a substituent; R′ and R″ or R″ and R′″ may be bonded to each other to form a ring that may have a substituent; and W is a hydrogen atom or a substituent. Using the curable composition of the present invention, it is possible to form a cured product having a small Abbe number, a large partial dispersion ratio, and high light stability.

An object is to provide a light-emitting element with a favorable lifetime. A light-emitting element which includes a first electrode, a second electrode, and an EL layer and in which the EL layer includes a hole-injection layer and first to fourth layers; the hole-injection layer includes an organic acceptor and is positioned between the first electrode and the first layer; the first layer includes a first hole-transport material; the second layer includes a second hole-transport material and is positioned between the first layer and the third layer; the third layer includes a third hole-transport material; the fourth layer includes a host material and a light-emitting material and is positioned between the third layer and the second electrode; the HOMO level of the second hole-transport material is deeper than the HOMO level of the first hole-transport material; the HOMO level of the host material is deeper than the second hole-transport material HOMO level; the HOMO level of the third hole-transport material is deeper than or equal to the HOMO level of the host material; a difference between the HOMO level of the second hole-transport material and the HOMO level of the third hole-transport material is less than or equal to 0.3 eV; and the second hole-transport material is a triarylamine compound having a structure where a dibenzofuran skeleton or a dibenzothiophene skeleton is bonded to nitrogen of an amine directly or via a divalent aromatic hydrocarbon group.