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##

The present invention relates to a compound and an organic light-emitting device containing the compound. The compound has a structure as shown in Formula (1), where X is selected from the group consisting of: O, S, Se, CR.sub.3R.sub.4, SiR.sub.5R.sub.6, GeR.sub.7R.sub.8 and BR.sub.9. The compound can be used in organic light-emitting devices, particularly as a host material or a hole blocking layer material in an emitting layer of a device or both as the host material and hole blocking layer material simultaneously. Moreover, the compound can provide a higher luminous efficiency for a device, especially has the advantages such as a longer service life of a device, and has the possibility to be applied to the AMOLED industry.

##STR00001##

A compound of Formula I ##STR00001## wherein at least one of R.sup.1 or R.sup.2 includes a polycyclic group selected from the group consisting of Formula A, Formula B, and Formula C: ##STR00002##
wherein X.sup.1, X.sup.2, X.sup.3, and X.sup.4 are independently CR.sup.A or N; X.sup.5, X.sup.6, X.sup.7, and X.sup.8 are independently CR.sup.B or N; X.sup.9, X.sup.10, X.sup.11, and X.sup.12 are independently CR.sup.C or N; X.sup.13, X.sup.14, X.sup.15, and X.sup.16 are independently CR.sup.D or N; X.sup.17, X.sup.18, X.sup.19, and X.sup.20 are independently CR.sup.E or N; X.sup.21, X.sup.22, X.sup.23, and X.sup.24 are independently CR.sup.F or N; X.sup.25, X.sup.26, X.sup.27, and X.sup.28 are independently CR.sup.G or N; X.sup.29, X.sup.30, X.sup.31, and X.sup.32 are independently CR.sup.H or N; Y is selected from the group consisting of O, S, NR, and CRR′; the maximum number of N atoms that can connect to each other within each ring is two; with the proviso that R.sup.1 does not connect to ring B, and R.sup.2 does not connect to ring A, and wherein at least one of R.sup.C and R.sup.D of Formula A is a direct bond or an organic linker, one of R.sup.E and R.sup.F of Formula B is a direct bond or an organic linker, or one of R.sup.G, R.sup.H, and R.sup.N of Formula C is a direct bond or an organic linker.

Provided are compounds capable of functioning as an emitter in an organic light emitting device at room temperature, and the compounds are at least 40% deuterated. Also provided are their uses in OLED related electronic devices.

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, 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:

##STR00001##

wherein, in Formulae 1A, 1B, CY.sub.1, CY.sub.2, CY.sub.4, X.sub.1, X.sub.2, Y.sub.1, R.sub.1, R.sub.2, R.sub.10, R.sub.20, R.sub.40, R.sub.31, R.sub.32, R.sub.33, R.sub.34, R.sub.40, b10, b20, and b40 are as provided herein, and wherein * and * each indicate a binding site to M.sub.1.

The present disclosure relates to compounds capable of emitting delayed fluorescence, and uses of these compounds in organic light-emitting diodes.

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.]

The near-infrared window of fluorescent heptamethine cyanine dyes greatly facilitates biological imaging because there is deep penetration of the light and negligible background fluorescence. But dye instability, aggregation, and poor pharmacokinetics are current drawbacks that limit performance and the scope of possible applications. All these limitations are simultaneously overcome with a new molecular design strategy that produces a charge balanced and sterically shielded fluorochrome. The key design feature is a meso-Aryl group that simultaneously projects two shielding arms directly over each face of a linear heptamethine polyene. Cell and mouse imaging experiments compared a shielded heptamethine cyanine dye (and several peptide and antibody bioconjugates) to benchmark heptamethine dyes and found that the shielded systems possess an unsurpassed combination of photophysical, physiochemical and biodistribution properties that greatly enhance bioimaging performance.

Provided is a light-emitting device and an electronic apparatus including the same. 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, wherein 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 along 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 platinum, the capping layer includes an amine-containing compound, and a value of a 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 Equation 1.

CIEy/R(cap)×100  Equation 1

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.