An organometallic compound, represented by Formula 1:

M.sub.1(Ln.sub.1).sub.n1(Ln.sub.2).sub.n2  Formula 1

wherein, in Formula 1, Ln.sub.1 is a ligand represented by Formula 1A, Ln.sub.2 is a ligand represented by Formula 1B, n1 is 1 or 2, and n2 is 1 or 2:

##STR00001##

wherein X.sub.1, X.sub.2, Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4, Y.sub.5, Y.sub.6, Y.sub.7, Y.sub.8, Y.sub.9, Y.sub.10, CY.sub.1, CY.sub.2, CY.sub.3, T.sub.1, T.sub.2, a1, a2, R.sub.10, R.sub.20, R.sub.30, b10, b20, and b30 are each as described herein.

The disclosure pertains to an organic molecule for use in optoelectronic devices. The organic molecule has a structure of Formula I:

##STR00001## wherein X is selected from the group consisting of a direct bond, NR.sup.1, O, S, SiR.sup.1R.sup.2 and CR.sup.1R.sup.2; Y is selected from the group consisting of a direct bond, NR.sup.3, O, S, SiR.sup.3R.sup.4 and CR.sup.3R.sup.4; and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently selected from the group consisting of: hydrogen, deuterium, N(R.sup.5).sub.2, OR.sup.5, SR.sup.5, Si(R.sup.5).sub.3, B(OR.sup.5).sub.2, OSO.sub.2R.sup.5, CF.sub.3, CN, halogen, C.sub.1-C.sub.40-alkyl, C.sub.1-C.sub.40-alkoxy, C.sub.1-C.sub.40-thioalkoxy, C.sub.2-C.sub.40-alkenyl, C.sub.2-C.sub.40-alkynyl, C.sub.6-C.sub.60-aryl, and C.sub.3-C.sub.57-heteroaryl.

A fluorescent material and a method of synthesizing thereof are provided. The fluorescent material includes a formula (1) as follows:

##STR00001##

formula (1), and Y is N or B; X.sub.1 and X.sub.2 are the same or different; X.sub.1 and X.sub.2 are selected from C or Si; R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different; R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are selected from a hydrogen atom, an alkyl group, an aromatic hydrocarbon group, or a heteroaryl group; R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are the same or different; R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are selected from an alkyl group, an aromatic hydrocarbon group, or a heteroaryl group; or R.sub.5 and R.sub.6 form a cyclic group; or R.sub.7 and Rs form a cyclic group.

Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers includes a first host selected from indolocarbazole compounds, a second host selected from the compounds represented by the following general formula (2), and, as a light emitting dopant, a polycyclic aromatic compound represented by the following general formula (3) or a polycyclic aromatic compound represented by the general formula (3) as a substructure, wherein Y.sup.4 is B, P, P═O, P═S, Al, Ga, As, Si—R.sup.4 or Ge—R.sup.5, and X.sup.4 is O, N—Ar.sup.4, S or Se.

##STR00001##

Provided is a light-emitting material with polycyclic ligand. The light-emitting material is a metal complex with polycyclic ligand and may be used as a light-emitting material in an electroluminescent device. While maintaining a very narrow FWHM, these novel metal complexes can better adjust the light-emitting color of the device, reduce the driving voltage of the device or maintain the driving voltage at a low level, improve device efficiency, greatly increase the lifetime of the device, and provide better device performance. Further provided are an electroluminescent device and a compound composition.

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having the structure of Formula VIII. ##STR00001##

The triarylamine compound having a specific structure in the present invention is excellent in hole injection/transport ability, stability and durability of thin film. By selecting the triarylamine compound having a specific structure as the material for the hole transport layer, holes injected from the anode side can be efficiently transported. Furthermore, various organic EL devices combining luminescent materials having a specific structure or the like exhibit good device characteristics. The triarylamine compound having a specific structure in the present invention is excellent in hole injection/transport ability, stability and durability of thin film. By selecting the triarylamine compound having a specific structure as the material for the hole transport layer, holes injected from the anode side can be efficiently transported. Furthermore, various organic EL devices combining luminescent materials having a specific structure or the like exhibit good device characteristics.

Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic electroluminescent device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers comprises one or more hosts selected from the indolocarbazole compounds represented by the following general formula (1) and, as a light emitting dopant, a polycyclic aromatic compound represented by the following general formula (2) or a polycyclic aromatic compound having the structure represented by the general formula (2) as a substructure, and wherein in the formulae Z is an indolocarbazole ring-containing group, X.sup.1 is O, N—Ar.sup.3, S, or Se, and Y.sup.1 is B, P, P═O, P═S, Al, Ga, As, Si—R.sup.2 or Ge—R.sup.3.

##STR00001##

A composition containing a phosphorescent compound represented by the formula (1) and a compound (F) having a condensed hetero ring skeleton containing at least one atom (a) selected from the group consisting of a nitrogen atom and a boron atom in the ring is provided. If the value of the energy level in the lowest triplet excited state of the above-described phosphorescent compound is expressed as T.sub.p (eV), the value of the energy level of the lowest triplet excited state of the above-described compound (F) is expressed as T.sub.F (eV) and the number of the above-described atom (a) in the condensed hetero ring skeleton per 1000 of the molecular weight of the above-described compound (F) is expressed as N.sub.f, then, the formula (A) and the formula (B) are satisfied:

|T.sub.P|−|T.sub.F|≥0.15  (A)

0.01≤N.sub.f≤4.5  (B)

##STR00001##

Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device comprises one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains a first host, a second host, and a light emitting dopant; the first host is a carbazole compound or a bicarbazole compound; the second host is an indolocarbazole compound; and the light emitting dopant is a polycyclic aromatic compound represented by the general formula (4) or a polycyclic aromatic compound having this structure as a partial structure. In the formula, Y.sup.4 is B, P, P═O, P═S, AL, Ga, As, Si—R.sup.4, or Ge—R.sup.41, and X.sup.4 is O, N—Ar.sup.4, S, or Se.