An electrochromic compound has a structure represented by the following general formula (1):

##STR00001##

where each of X.sub.1 to X.sub.3 independently represents a carbon atom or a silicon atom, and each of R.sub.1 to R.sub.15 independently represents a member selected from a hydrogen atom, a halogen atom, a monovalent organic group, and a polymerizable functional group.

A fluorescent dye, as well as a preparation method and uses thereof, wherein the fluorescent dye is sensitive and specific to viscosity and has low background fluorescence; it can also be used as a fluorescent activated and lighted probe used for fluorescent labeling, quantification or monitoring of protein, enzymes or nucleic acid.

The present specification provides a compound of Chemical Formula 1, a coating composition including the same, and an organic light emitting device using the same.

A compound of Formula Ir(L.sub.A)(L.sub.B)(L.sub.C) is disclosed. In Formula Ir(L.sub.A)(L.sub.B)(L.sub.C), L.sub.A has Formula I,

##STR00001##

L.sub.B has Formula II,

##STR00002##

L.sub.C is a monoanionic bidentate ligand that does not comprise a phenylpyridine ligand; and each of L.sub.A, L.sub.B, and L.sub.C is different. Each of moieties A, C, and D is independently a monocyclic ring or a polycyclic fused ring structure or 5-membered and/or 6-membered rings; each of X.sup.1 to X.sup.6 is C or N; each of Z.sup.1 and Z.sup.2 is C or N; at least one of Z.sup.1 and Z.sup.2 is N; each R.sup.A, R.sup.B, R.sup.C, and R.sup.D is independently a hydrogen or a General Substituent; and any two adjacent substituents can be joined or fused together to form a ring. Formulations, OLEDs, and consumer products including the compound are also disclosed.

Thermally activated delayed fluorescent compounds and uses thereof are described. The thermally activated delayed fluorescent compounds are an analogues of 9,10-dihydro-9,9-dimethylacridine compounds.

A compound comprising a ligand L.sub.A comprising a moiety L having a structure of Formula I

##STR00001##

is provided. In Formula I, L.sub.A coordinated to a metal M; A.sup.1 is selected from B, N, P, P═O, P═S, Al, Ga, SiR″, GeR″, and SnR″; where rings A, B, and C are 5- or 6-membered rings; Y.sup.1, Y.sup.2, and Y.sup.3 are selected from direct bonds, the metal M, and a variety of linkers; a+b+c=2 or 3; and one of a number of specific conditions is met. OLED devices, consumer products, and formulations including the compound are also provided.

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.

Provided are compounds of Formula I and Formula II. Also provided are formulations comprising these compounds. Further provided are optoelectronic devices that utilize these compounds.

##STR00001##

The present invention discloses an iridium complex represented by the following formula (1) and an organic electroluminescence device using the iridium complex as a phosphorescent dopant material. The phosphorescent dopant material may be for lowering a driving voltage or power consumption or increasing a current efficiency of half-life of the organic electroluminescence device. ##STR00001## The same definition as described in the present invention.

In the organic electroluminescent device having at least an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the hole injection layer includes an arylamine compound of the following general formula (1) and an electron acceptor. ##STR00001##
In the formula, Ar.sub.1 to Ar.sub.4 may be the same or different, and represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.