The present invention relates to an organic electroluminescent device including at least one light-emitting layer B composed of one or more sublayers, wherein the one or more sublayers of the light-emitting layer B as a whole include at least one host material H.sup.B, at least one phosphorescence material P.sup.B, at least one small FWHM emitter S.sup.B, and optionally at least one TADF material E.sup.B, wherein S.sup.B emits light with a full width at half maximum (FWHM) of less than or equal to 0.25 eV.

The present invention relates to an organic electroluminescent device including at least one light-emitting layer B composed of one or more sublayers, wherein the one or more sublayers of the light-emitting layer B as a whole include at least one host material H.sup.B, at least one phosphorescence material P.sup.B, at least one small FWHM emitter S.sup.B, and optionally at least one TADF material E.sup.B, wherein S.sup.B emits light with a full width at half maximum (FWHM) of less than or equal to 0.25 eV.

An aryldiamine compound represented by formula (1) and an organic electroluminescent device including a pair of electrodes and at least one organic layer disposed therebetween wherein the at least one organic layer contains the aryldiamine compound. The aryldiamine compound is excellent in hole transporting properties, hole injection properties, electron blocking properties, stability in thin film form, and heat resistance. The organic electroluminescent device achieves high emission efficiency and power efficiency, drives at a low voltage, and, in particular, has a long life. ##STR00001##

Provided are an organometallic compound represented by Formula 1, an organic light-emitting device including the organometallic compound, and a diagnostic composition including the organometallic compound:

M.sub.1(L.sub.11).sub.n11(L.sub.12).sub.n12   Formula 1

wherein L.sub.11 in Formula 1 is a ligand represented by Formula 1-1:

##STR00001##

wherein, in Formula 1-1, Ar.sub.1 is a phenyl group substituted with at least one of E.sub.1 and Ar.sub.2 is a phenyl group substituted with at least one E.sub.2, and the other substituents are described in the detailed description of the present specification.

An organic electroluminescent device includes at least two light-emissive units provided between a cathode electrode and an anode electrode opposed to the cathode electrode, each of the light-emissive units including at least one light-emissive layer. The light-emissive units are partitioned from each other by at least one charge generation layer, the charge generation layer being an electrically insulating layer having a resistivity of not less than 1.0×10.sup.2 Ωcm.

Provided is an electrochromic compound represented by the following general formula (I) or (II) where R.sub.1 to R.sub.13 are each independently a hydrogen atom, a halogen atom, a monovalent organic group, or a polymerizable functional group, and at least one of the R.sub.1 to the R.sub.13 is a polymerizable functional group. ##STR00001##

A composition which is useful for producing a light emitting device having excellent luminance life contains a compound represented by formula (C-1), a metal complex represented by formula (1) and a metal complex represented by formula (2):

##STR00001##

Ring R.sup.1 C to Ring R.sup.4 C represent an aromatic hydrocarbon ring and R.sup.C represents a carbon atom. M.sup.1 represents an iridium atom, n.sup.1 and n.sup.2 are integers, Ring R.sup.1 A represents a diazole ring, Ring R.sup.2 represents an aromatic hydrocarbon ring, E.sup.1, E.sup.2 and E.sup.1 1 A to E.sup.1 3 A represent a nitrogen or carbon atom, R.sup.1 1 A to R.sup.1 3 A represent a hydrogen atom, an alkyl group, or an aryl group, and A.sup.1-G.sup.1-A.sup.2 represents an anionic bidentate ligand. M.sup.2 represents an iridium atom, n.sup.3 and n.sup.4 are integers, E.sup.L represents a carbon atom, Ring L.sup.1 represents a 6-membered aromatic hetero ring, Ring L.sup.2 represents an aromatic hydrocarbon ring, and A.sup.3-G.sup.2-A.sup.4 represents an anionic bidentate ligand.

An aryldiamine compound represented by formula (1) and an organic electroluminescent device including a pair of electrodes and at least one organic layer disposed therebetween wherein the at least one organic layer contains the aryldiamine compound. The aryldiamine compound is excellent in hole transporting properties, hole injection properties, electron blocking properties, stability in thin film form, and heat resistance. The organic electroluminescent device achieves high emission efficiency and power efficiency, drives at a low voltage, and, in particular, has a long life.

##STR00001##

A compound of Formula I

##STR00001## wherein L is a bidentate ligand coordinated to a metal M; each ring K is the same, and represents a 5-membered or 6-membered heteroaryl ring and with ring J forms a 5-member cyclometallated ring; A.sup.1 and A.sup.1 are the same and selected from CR.sup.1 or N; A.sup.2 and A.sup.2 are the same and selected from CR.sup.2 or N; A.sup.3 and A.sup.3 are the same and selected from CR.sup.3 or N; each R.sup.4 with its corresponding ring position R.sup.4 are the same, and R.sup.1 to R.sup.5 are as defined in the specification. An OLED with an organic layer that includes a compound of Formula I and a consumer product that includes the OLED. A method of making a compound of Formula I is also described.

Provided is an electrochromic compound represented by the following general formula (I) or (II) where R.sub.1 to R.sub.13 are each independently a hydrogen atom, a halogen atom, a monovalent organic group, or a polymerizable functional group, and at least one of the R.sub.1 to the R.sub.13 is a polymerizable functional group.

##STR00001##