Abstract: A light emitting element of one or more embodiments includes a first electrode, a second electrode oppositely to the first electrode, and an emission layer between the first electrode and the second electrode. The light emitting element of one or more embodiments includes a polycyclic compound represented by a specific chemical structure in the emission layer, thereby showing improved emission efficiency and life characteristics.

Abstract: An organic electroluminescence device of an embodiment of the present disclosure includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region.

Abstract: A light emitting element includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode and including a polycyclic compound represented by Formula 1 below, thereby showing high emission efficiency. The substituents of Formula 1 are the same as defined in the detailed descriptions.

Abstract: A light emitting element includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer may include a first compound represented by Formula 1, and at least one of a second compound, a third compound, and a fourth compound. The light emitting element including the first compound represented by Formula 1 exhibits high efficiency and a long lifespan.

Abstract: Provided is a light emitting element includes a polycyclic compound in which an electron donor substituent, which may increase the photoluminescence quantum yield (PLQY) and oscillator strength (f), is introduced at the para-position of a boron atom, thereby exhibiting high efficiency and long service life characteristics.

Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The emission layer includes a polycyclic compound represented by Formula 1, thereby showing high emission efficiency.

Abstract: An organic electroluminescence device of an embodiment of the present disclosure includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region.

Abstract: A novel iridium complex which can be applied in an organic electroluminescent light emitting device, an organic electrochemical light emitting device, or the like, and which is thermally stable and has excellent sublimabilities. An iridium complex characterized by being represented by General Formula (1) (in General Formula (1), R1 to R11 and R13, R14, and R18 represent a hydrogen atom, an alkyl group with 1 to 30 carbon atoms, an aryl group with 6 to 30 carbon atoms, a halogen atom, or a cyano group; R12, R15 to R17 and R19 represent a hydrogen atom, an alkyl group with 1 to 30 carbon atoms, a halogen atom, or a cyano group; the alkyl group may be substituted with an aryl group, a halogen atom, or a cyano group; the aryl group may be substituted with an alkyl group, a halogen atom, or a cyano group; adjacent R12 to R19 may bind to each other to form a condensed ring; and m is an integer of 1 or 2, n is an integer of 1 or 2, and m+n is 3).

Abstract: A novel iridium complex which can be applied in an organic electroluminescent light emitting device, an organic electrochemical light emitting device, or the like, and which is thermally stable and has excellent sublimabilities. An iridium complex characterized by being represented by General Formula (1) (in General Formula (1), R1 to R11 and R13, R14, and R18 represent a hydrogen atom, an alkyl group with 1 to 30 carbon atoms, an aryl group with 6 to 30 carbon atoms, a halogen atom, or a cyano group; R12, R15 to R17 and R19 represent a hydrogen atom, an alkyl group with 1 to 30 carbon atoms, a halogen atom, or a cyano group; the alkyl group may be substituted with an aryl group, a halogen atom, or a cyano group; the aryl group may be substituted with an alkyl group, a halogen atom, or a cyano group; adjacent R12 to R19 may bind to each other to form a condensed ring; and m is an integer of 1 or 2, n is an integer of 1 or 2, and m+n is 3).

Abstract: A method for obtaining, with high selectivity as compared to a conventional method of mixing reaction substrates and thereafter reacting the mixture under heating, a facial isomer of tris-orthometallated iridium that is suitably used particularly as an organic electroluminescence device material, among complexes of tris-orthometallated iridium. The method for producing a complex of tris-orthometallated iridium according to the present disclosure includes, in order, a step (1) of preliminarily heating at least one of the complex of orthometallated iridium or the bidentate organic ligand; a step (2) of mixing the complex of orthometallated iridium and the bidentate organic ligand; and a step (3) of reacting the complex of orthometallated iridium and the bidentate organic ligand.

Abstract: A method for obtaining, with high selectivity as compared to a conventional method of mixing reaction substrates and thereafter reacting the mixture under heating, a facial isomer of tris-orthometallated iridium that is suitably used particularly as an organic electroluminescence device material, among complexes of tris-orthometallated iridium. The method for producing a complex of tris-orthometallated iridium according to the present disclosure includes, in order, a step (1) of preliminarily heating at least one of the complex of orthometallated iridium or the bidentate organic ligand; a step (2) of mixing the complex of orthometallated iridium and the bidentate organic ligand; and a step (3) of reacting the complex of orthometallated iridium and the bidentate organic ligand.