The present invention relates to the preparation of a novel tetradentate platinum (II) complex and an application thereof, belonging to the field of OLED organic electroluminescent materials. The complex of the present invention has the following structural formula, and is used for a phosphorescent doping material having a photon emission effect in a light-emitting layer of an OLED luminescent device. The complex of the present invention has a high fluorescence quantum efficiency, a good heat stability and a low quenching constant, and can be used for the manufacture of a green light OLED device with a high luminous efficiency and low roll-off.

##STR00001##

The present invention relates to an iridium complex compound represented by the following formula (1):

##STR00001##

in the formula (1), Ir represents an iridium atom, R.sup.5 to R.sup.14, R.sup.21, and R.sup.22 each independently represent a hydrogen atom, D, F, Cl, Br, I, or a substituent group, the groups adjacent to each other may be further bonded to each other to form a ring, and any one of R.sup.12 and R.sup.13 is a substituent group represented by the formula (2).

Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

A display apparatus, comprising a substrate; a light-emitting device layer arranged on the substrate, wherein the light-emitting device layer comprises a first, second, and third areas, and at least one light-emitting device emitting a first light; and a color conversion layer arranged on the light-emitting device layer, wherein the color conversion layer comprises first, second, and third color conversion areas, wherein the first color conversion area emits a first color light, the second color conversion area emits a second color light, the third color conversion area emits a third color light, a maximum emission wavelength of the first, second, and third color lights are greater than a maximum emission wavelength of the first light, a color of the third color light is identical to that of the first light, and the maximum emission wavelength of the third color light is greater than the maximum emission wavelength of the first light.

A compound, Ir(L.sub.A).sub.m(L.sub.B).sub.3-m, having a structure of Formula I,

##STR00001##

is provided. In Formula I, each of moiety A and moiety C is independently a 5- or 6-membered ring or a polycyclic fused ring system comprising 5- or 6-membered rings; moiety B is a 5-membered heterocyclic ring; Z.sup.1, Z.sup.2, and Z.sup.3 are C or N; m is 1 or 2; at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 has a structure of Formula II,

##STR00002##

or is a 5-membered heterocyclic ring; each of X.sup.1, X.sup.2, X.sup.3, X.sup.4, and X.sup.5 is CR or N; each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.A, R.sup.B, R.sup.C, and R is hydrogen or a General Substituent; at least one of R.sup.1a, R.sup.2a, R.sup.3a, R.sup.4a, R.sup.5a is cycloalkyl, alkyl, silyl, germyl, deuterated variants thereof, fluorinated variants thereof, and combinations thereof. Formulations, OLEDs, and consumer products containing the compound are also provided.

The present invention relates to iridium complexes suitable for use in organic electroluminescent devices, especially as emitters.

A metal tetradentate complex is disclosed in which an imidazole moiety is used as a linker in the ligand. The complex is useful as an emitter or other functional roles in an OLED device.

An organometallic compound represented by Formula 1:
M(L.sub.1).sub.n1(L.sub.2).sub.n2(L.sub.3).sub.n3  Formula 1 wherein M, L.sub.1, L.sub.2, L.sub.3, n1, n2, and n3 are the same as described in the specification.

An organic electroluminescence device includes a first electrode, an organic layer disposed on the first electrode, and a second electrode disposed on the organic layer. The organic layer includes an organometallic compound represented by Formula 1 below. ##STR00001##
where R.sub.1 to R.sub.4, X.sub.1 to X.sub.4, Ar.sub.1 to Ar.sub.3, M, Q, m1 to m4, and n are as defined in the specification.

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 organometallic compound of Formula 1, and at least one selected from a second compound and a third compound, where the organometallic compound, the second compound, and the third compound are different from each other. When the emission layer comprises both the second compound and the third compound, the second compound and the third compound form an exciplex, and the organometallic compound and the second compound and/or the third compound do not form an exciplex:
M(L.sub.1).sub.n1(L.sub.2).sub.n2,  Formula 1
wherein in Formula 1, L.sub.1 is represented by Formula 2-1: ##STR00001##