The invention relates to an electronic device, to the use thereof, and to a method for the production thereof.

The present invention relates to compounds of formula

##STR00001##

a process for their production and their use in electronic devices, especially electroluminescent devices. When used as host material for phasphorescent emitters in electroluminescent devices, the compounds of formula I may provide improved efficiency, stability, manufacturability, or spectral characteristics of electroluminescent devices.

A series of novel donor-acceptor type TADF luminogens have been designed with the aim of developing stable OLEDs with enhanced operational stability and improved color purity. These materials could be found utilization for full color displays and lighting applications.

A compound of: ##STR00001##
is disclosed. In Formula IV, ring B and ring C are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; A-B represents a bonded pair of carbocyclic or heterocyclic rings coordinated to a metal M via a nitrogen atom in ring A and an sp.sup.2 hybridized atom in ring B; A-C represents a bonded pair of carbocyclic or heterocyclic rings; M is a metal having an atomic number greater than 40; L′ is a monoanionic bidentate ligand; m is the oxidation state of the metal M; and n is at least 1.

A light emitting element includes a first electrode, a second electrode disposed on the first electrode, and a light emitting area disposed between the first electrode and the second electrode and including a phosphorescent dopant, a hole transporting host, and an electron transporting host, wherein the light emitting area includes at least one auxiliary light emitting layer including a thermally activated delayed fluorescence dopant, the hole transporting host, and the electron transporting host and spaced apart from the first electrode and the second electrode.

Described herein are two-coordinated d10 metal carbene complexes containing (i) Cu(I), Ag(I), or Au(I), (ii) a pyrazine-fused NHC ligand or a pyridine-fused NHC ligand, and (iii) a carbazole ligand, a pyrido[2,3-b]indole ligand, or a pyrido[3,4-b]indole ligand. The radiative properties of the compounds can be controlled by thermally activated delayed fluorescence. The emission colors of the complexes can be tuned by using carbazoles with varying donor strength. Also described are methods of using the complexes.

An organic light-emitting device including a first compound represented by Formula 1 and a second compound represented by one of Formulae 2A and 2B. ##STR00001##

Disclosed in the present invention is a deuterated indolocarbazole compound, mixture and formulation comprising the said compound, and an organic electronic device. For said deuterated indolocarbazole compound, in an indolocarbazole conjugated system, a C—H bonding is optionally replaced by a C-D bonding, thus reduces the reactivity of the compound and moreover allowing the superior chemical and environmental stability. The present invention applies the deuterated indolocarbazole compound to the organic electronic device and provided is a solution for improving the stability and lifespan of the device.

The present invention relates to a novel indole-based compound having excellent hole injection and transport capabilities, light-emitting capabilities, and the like, and an organic electroluminescence device which includes the indole-based compound in one or more organic material layers thereof so as to improve characteristics such as light-emitting efficiency, driving voltage, and lifespan.

An organometallic compound is represented by Formula 1. A 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 the organometallic compound. An electronic apparatus includes the light-emitting device.

##STR00001##

The description of Formula 1 is provided in the specification.