The present application relates to a polycyclic compound including nitrogen and an organic light emitting device including the same.

The present invention relates to a compound for an organic optoelectronic element, represented by chemical formula I, an organic optoelectronic element employing the same, and a display device. The details of chemical formula I above are defined as in the specification.

Thermally activated delayed fluorescent compounds and uses thereof are described. The thermally activated delayed fluorescent compounds are an analogues of 9,10-dihydro-9,9-dimethylacridine compounds.

Described herein are molecules for use in organic light emitting diodes. Example molecules comprise at least one moiety A and at least one moiety D. Values and preferred values of the moieties A and D are described herein. The molecules comprise at least one atom selected from Si, Se, Ge, Sn, P, or As.

To provide a light-emitting element including an exciplex that efficiently emits light. The light-emitting element includes a first organic compound and a second organic compound. A combination of the first organic compound and the second organic compound forms an exciplex. The energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound is greater than the emission energy of the exciplex by −0.1 eV or more and 0.4 eV or less. The lower of the lowest triplet excitation energy level of the first organic compound and the lowest triplet excitation energy level of the second organic compound has energy that is larger than the emission energy of the exciplex by −0.2 eV or more and 0.4 eV or less.

Disclosed is a novel compound represented by formula (1) below. In the formula, A represents an optionally substituted aromatic hydrocarbon ring or aromatic heterocyclic group, B represents a group including a chain of one to four pieces of one or more groups selected from groups represented by specific formulae (B-1) to (B-13) (such as —C═C— or —N═N—, specifically see the description), R1 to R3 each represent an optionally substituted hydrocarbon or hydrocarbonoxy group, at least one of R1 to R3 represents an optionally substituted hydrocarbonoxy group, R4 and R5 each represent an optionally substituted hydrocarbon group, R4 and R5 may be linked together to form a ring, and R4 and R5 may be each independently linked with A to form a ring ##STR00001##

An organic light emitting display device is discussed. The organic light emitting display device in one embodiment includes at least one light emitting layer between an anode and a cathode, and an electron transport layer between the at least one light emitting layer and the cathode. The electron transport layer may include a first electron transport material for blocking holes from the light emitting layer to the electron transport layer, and a second electron transport material for assisting in a transfer of electrons to the light emitting layer, wherein the first electron transport material and the second electron transport material have different triplet exciton energy levels and different electron mobilities.

An organic electronic material containing a charge transport compound having a structural region represented by formula (I) and having a weight average molecular weight greater than 40,000.
—Ar—X—Y—Z  (I)
In the formula, Ar represents an arylene group or heteroarylene group of 2 to 30 carbon atoms, X represents a linking group, Y represents an aliphatic hydrocarbon group of 1 to 10 carbon atoms, and Z represents a substituted or unsubstituted polymerizable functional group.

A light emitting device is provided which includes an anode, a cathode, and an organic layer disposed between the anode and the cathode and including a composition containing a thermally activated delayed fluorescent compound (A), a boron atom, and a compound (B) having a condensed hetero ring skeleton. The absolute value (|EB−AA|) of a difference between the energy value of the maximum peak of the emission spectrum at 25° C. of compound (B) and the energy value of a peak at the lowest energy side of the absorption spectrum at 25° C. of compound (A) is 0.60 eV or less. The absolute value of a difference between the energy levels of the lowest triplet and singlet excited states of compound (A) is 0.50 eV or less. The absolute value of a difference between the energy levels of the lowest triplet and singlet excited states of compound (B) is 0.50 eV or less.

The present disclosure relates to the technical field of display, and specifically relates to an organic electroluminescent device, and in particular, to a highly efficient fluorescence device. An organic electroluminescent device includes a hole transport layer, and a light-emitting layer. The hole transport layer and the light-emitting layer has an interface exciplex formed at an interface therebetween.