The present invention addresses the problem of providing a novel polycyclic aromatic compound and an organic electroluminescent element using the same. The above problem is solved by providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are connected by boron atoms, oxygen atoms, or the like, thereby increasing the number of options for organic EL element materials, and also solved by providing a superior organic EL element using said novel polycyclic aromatic compound as an organic EL element material.

Polycyclic aromatic compound

The present invention relates to: a novel compound having an excellent light-emitting ability; and an organic electroluminescent element having improved characteristics such as light-emitting efficiency, driving voltage, and lifespan since at least one organic layer thereof contains the compound.

Organic compound and organic electroluminescent element comprising same

The present invention relates to a novel polycyclic aromatic compound (1) comprising a plurality of aromatic rings bonded by a boron atom and a nitrogen atom, and in combination with the novel polycyclic aromatic compound (1) A material for a light-emitting layer of a specific lanthanoid compound (3) which exhibits optimum luminescent properties An excellent organic EL element can be provided by the material for a light-emitting layer of the present invention having optimum light-emitting characteristics □A ring to C ring are aryl rings, etc, and X is a group represented by formula (3-X1), formula (3-X2) or formula (3-X3), Ar1
~Ar4
It is a phenyl group or a group represented by the formula (4)

Organic electroluminescent element

The present invention relates to an organic compound and an organic electroluminescent device which includes the same in at least one organic substance layer and thus exhibits improved properties such as luminous efficiency, driving voltage, and lifespan.

Organic compound and organic electroluminescent device comprising the same

The objective of the invention is to provide a polycyclic aromatic compound in which solubility to a solvent, film formability, wet coatability, thermal stability, and in-plane orientation are improved This objective is achieved by a light emission layer-forming composition comprising: as a first component, at least one type of dopant material selected from the group consisting of polycyclic aromatic compounds represented by general formula (A) and polycyclic aromatic oligomer compounds including a plurality of structures represented by general formula (A); as a second component, a specific low-molecular-weight host material; and, as a third component, at least one type of organic solvent In formula (A), ring A, ring B, and ring C each independently represent an aryl ring or a hetero aryl ring, Y1 is B, and X1 and X2 each independently represent O or N-R wherein at least one of X1 and X2 is N-R

Polycyclic aromatic compound and light emission layer-forming composition

A compound represented by the general formula below has high thermal stability and has excellent characteristics as a charge transport material. (Ar1 denotes a single bond, a benzene ring or the like; X1 denotes a linking group linked via an oxygen atom, a sulfur atom, a carbon atom, a nitrogen atom, a phosphorus atom or a silicon atom; one of L1 and L2 or L3 and L4 bond together to form a linking group linked via an oxygen atom, a sulfur atom, a carbon atom, a nitrogen atom, a phosphorus atom or a silicon atom and the other of L1 and L2 or L3 and L4 are hydrogen atoms or substituent groups; Y1 denotes a linking group linked via a nitrogen atom, a boron atom or a phosphorus atom; R1, R2, R5 to R7 and R10 to R12 are hydrogen atoms or substituent groups, and n1 is an integer of 2 or higher.)

Hidetaka Nishimura

Papers

Novel compound, charge transport material, and organic device