Tridentate platinum, palladium, and gold complexes of Formulas A-I and A-II and tridentate iridium and rhodium compounds of Formulas B-I, B-II, and B-III suitable for delayed fluorescent and phosphorescent or phosphorescent emitters in display and lighting applications.

##STR00001##

This polarized light-emitting film contains a water-soluble coumarin compound represented by formula (1) (in formula (1), A represents an optionally substituted coumarin skeleton, X represents a sulfo group or a carboxyl group, and n represents an integer of 1 to 3.) or a salt thereof.

##STR00001##

An organic light-emitting device includes a first electrode, a second electrode facing the first electrode, an emission layer between the first electrode and the second electrode, and a hole transport region between the first electrode and the emission layer. The emission layer includes a first compound represented by Formula 1, and the hole transport region includes a second compound represented by Formula 2: ##STR00001##

The present invention provides a luminescent film containing at least a phosphorescent compound and a fluorescent compound, wherein the convolution integral value J of the emission spectrum of the phosphorescent compound and the absorption spectrum of the fluorescent compound satisfies equation (1), the light emission from the fluorescent compound accounts for at least 90% of the emission spectrum of the luminescent film, and the absolute photoluminescence quantum efficiency (PLQE) of the luminescent film is represented by equation (2). Equation (1): J≥1.5×10.sup.14, Equation (2): PLQE (a film composed of a phosphorescent compound and a host compound)×0.9≤PLQE (a film containing a phosphorescent compound and a fluorescent compound) [The lowest triplet excited state of the host compound is higher than the lowest triplet excited state of the phosphorescent compound, and does not suppress the luminescent property of the phosphorescent compound.]

A light-emitting device and an electronic apparatus including the same are provided. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode and including an emission layer, and a capping layer. The emission layer includes a first emitter, the first emitter emits a first light having a first emission spectrum, the capping layer is in a path on which the first light travels, an emission peak wavelength of the first light is about 520 nm to about 550 nm. The first emitter includes iridium, the capping layer includes an amine-free compound, and the value of ratio of CIEy to reflective index (RCR value) of the first light extracted to the outside through the capping layer is 38 or less, and the RCR value is calculated according to CIEy/R(cap)×100.

A compound comprising a first ligand L.sub.A of Formula I,

##STR00001##

is provided. In Formula I, Ring A is a 5-membered or 6-membered ring, and moiety G has a structure of

##STR00002##

where
the dashed line marked with * is coordinated to Ir; the dashed line marked with # is bonded to Ring A; Y is selected from the group consisting of BR, BRR′, NR, PR, O, S, Se, C═O, C═S, C═Se, C═NR, C═CRR′, S═O, SO.sub.2, CR, CRR′, SiRR′, and GeRR′. Formulations, OLEDs, and consumer products containing the compound are also provided.

A compound having the formula Ir(L.sub.A).sub.n(L.sub.B).sub.3−n, having the structure ##STR00001##
Formula I, is disclosed. In Formula I, each of Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 is CR.sup.2; X is O, S, or Se; n is an integer from 1 to 3; R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 each independently represent mono- to a maximum possible number of substitutions, or no substitution; R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are each independently selected from a variety of substituents; any two substitutions in R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are optionally joined to form a ring; at least one pair of substitutions in R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are joined together to form a bridge structure comprising a backbone structure that forms a fused first ring, which can be further substituted; and the backbone structure is saturated. Organic light emitting devices and consumer products containing the compounds are also disclosed.

An organometallic compound represented by Formula 1:

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

wherein, M is a transition metal, L.sub.1 and L.sub.2 are ligands as provided herein, n1 and n2 are each independently 1 or 2, the sum of n1 and n2 is 2 or 3, and L.sub.1 is different from L.sub.2.

According to an aspect of the present disclosure, a compound having a metal planar tetradentate coordination configuration is disclosed. In the compounds, the metal M is Pt or Pd; the four coordinating atoms are Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 and are each selected from N, C, and O. The compound includes a substituent R, and atoms M, Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 are used to define a first plane that passes through the metal M and is positioned to have a minimum sum of shortest distances with Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4. At least one non-hydrogen atom in R falls within a distal circle of a cylinder extending perpendicular to the first plane, where the distal circle of the cylinder is a height h from the base circle and the height h ranges from 3.3 Å to 4.8 Å.

An organometallic compound represented by Formula 1:

##STR00001##

wherein M.sub.1 is a transition metal, 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:

##STR00002##

##STR00003##

wherein ring CY.sub.3 is: a 5-membered N-containing heterocyclic group; or a 5-membered N-containing heterocyclic group condensed with a C.sub.5-C.sub.30 carbocyclic group or a C.sub.1-C.sub.30 heterocyclic group, ring CY.sub.4 is: a 6-membered carbocyclic group; a 6-membered heterocyclic group; a 6-membered carbocyclic group condensed with a C.sub.5-C.sub.30 carbocyclic group or a C.sub.1-C.sub.30 heterocyclic group; or a 6-membered heterocyclic group condensed with a C.sub.5-C.sub.30 carbocyclic group or a C.sub.1-C.sub.30 heterocyclic group, Y.sub.1 is O, S, Se, or C(R.sub.1)(R.sub.2), Y.sub.2 is O or S, and b30, b40, R.sub.1, R.sub.2, R.sub.11 to R.sub.14, R.sub.21 to R.sub.26, R.sub.30, and R.sub.40 are as defined herein.