UDC Ireland Limited

The invention relates to heteroaromatic compounds which are suitable for use in electronic devices, and to electronic devices, in particular organic electroluminescent devices, containing said compounds

The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.

The present invention relates to the use of transition metal-carbene complexes in organic light-emitting diodes (OLEDs), to a light-emitting layer, to a blocking layer for electrons or excitons, or to a blocking layer for holes, each comprising these transition metal-carbene complexes, to OLEDs comprising these transition metal-carbene complexes, to devices which comprise an inventive OLED, and to transition metal-carbene complexes.

The invention relates to compounds which are suitable for use in electronic devices, and to electronic devices, in particular organic electroluminescent devices, containing said compounds.

The present invention relates to a compound of the formula (1), to the use of the compound in an electronic device, and to an electronic device comprising a compound of the formula (1). The present invention furthermore relates to a formulation comprising one or more compounds of the formula (1).

The present invention relates to organic light-emitting devices comprising (a) an anode, (i) a cathode, and (e) an emitting layer between the anode and cathode, comprising 2 to 40% by weight of a triplet emitter X having a difference of the singlet energy (E S1 (X)) and the triplet energy (E T1 (X)) of less than or equal to 0.4 eV [Δ(E S1 (X))−(E T1 (X))≤0.4 eV], 0.05 to 5.0% by weight of a fluorescent emitter Y and 55 to 97.95% by weight of a host compound(s), wherein the amount of the triplet emitter X, the fluorescent emitter Y and the host compound(s) adds up to a total of 100% by weight and the singlet energy of the triplet emitter X (E S1 (X)) is greater than the singlet energy of the fluorescent emitter Y (E S1 (Y)) [(E S1 (X))>E S1 (Y)]. By doping, for example, an emitting layer containing a luminescent organometallic complex having a small S 1 -T 1 splitting, with a fluorescent emitter the emission decay time can significantly be shortened without sacrificing external quantum efficiency (EQE) because of very efficient energy transfer.

An organic electroluminescent device includes a pair of electrodes; and an organic layer between the pair of electrodes, which includes a light-emitting layer, wherein the organic layer contains a compound represented by the following formula (I); and the light-emitting layer contains a iridium complex phosphorescent material: wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 each represents a hydrogen atom or a substituent, and contiguous substituents of R 1 to R 8 may be bonded to each other to form a condensed ring; R 9 represents an alkyl group, an alkenyl group, an aryl group, a hetero-aryl group, or a silyl group, and each of which group may be substituted with a substituent; and at least one of R 1 to R 9 represents a deuterium atom or a substituent containing a deuterium atom.

The present invention relates to metal complexes which are substituted by aromatic and bicydic aliphatic substituents and are suitable for use as emitters in organic electroluminescent devices. The electronic devices of the invention, especially organic electroluminescent devices, are notable for advantages that are not accompanied by a deterioration in the further electronic properties. The invention provides a compound of the following formula (1): wherein B is a group of the following formula (2):

An organic electroluminescent element including a substrate, a pair of electrodes including an anode and a cathode, disposed on the substrate, and at least one organic layer including a light emitting layer, disposed between the electrodes, in which at least one layer of the organic layer(s) contains a compound represented by the following formula, has low driving voltage and excellent durability. (X 1 to X 11 represent CR 0 or N, and R 0 represents a hydrogen atom or a substituent. Adjacent two of X 1 to X 11 each independently represent at least CR 0 , R 0 s of the adjacent two CR 0 s are bonded to each other to form a ring, and only one R 0 of the adjacent two CR 0 s represents an aryl group or a heteroaryl group.)

The present invention relates to compounds of formula 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.