Abstract: An organic electroluminescence device includes: a first electrode; a second electrode disposed on the first electrode; and at least one organic layer disposed between the first electrode and the second electrode. wherein the at least one organic layer includes a polycyclic compound having a core structure including a n,n?-bicarbazole moiety and, outside the core structure, at least one optionally substituted carbazole group, and the substituted or unsubstituted carbazole groups of the core structure substituted at any one among carbon atoms at position n±1 of the n,n?-bicarbazole moiety, and any one among carbon atoms at position n?±1 of the n,n?-bicarbazole moiety, respectively; and n and n? are, independently from one another, integers of 1 to 4 (where n±1 and n?±1 are not 0).

Abstract: Provided are a material for an organic electroluminescence device and an organic electroluminescence device including the same. The material for an organic electroluminescence device is a monoamine compound represented by the following General Formula (1). where X1 is one selected from O, S, R9—C—R10, or N—R11, R1 to R11 are each independently alkyl having 10 or less carbon atoms, aryl having 6 to 30 carbon atoms for forming a ring, alkyloxy, alkylthio, trialkylsilyl, aryloxy, arylthio, triarylsilyl, alkyldiarylsilyl, dialkylarylsilyl, or heteroaryl having 2 to 30 carbon atoms for forming a ring, n is an integer of 0 to 4, m is an integer of 0 to 3, and o is an integer of 0 to 2.

Abstract: An organic electroluminescence device of the embodiments includes oppositely disposed first electrode and second electrode, and a plurality of organic layers disposed between the first electrode and the second electrode, wherein at least one among the organic layers includes a fused polycyclic compound represented by Formula 1 below, thereby showing improved emission efficiency and long life: Formula 1

Abstract: A silicon-containing compound which improves emission efficiency and an organic electroluminescence device including the same are provided. The silicon-containing compound according to the inventive concept is represented by Formula 1 below.

Abstract: A heterocyclic compound represented by the following Formula 1 and an organic electroluminescence device including the same are provided.

Abstract: A phosphine-based compound and an organic electroluminescence device including the same, the phosphine-based compound being represented by the following Formula 1:

Abstract: An organic electroluminescent device of which emission life may be improved. The organic electroluminescent device includes an anode, an emission layer, and an anode-side hole transport layer provided between the anode and the emission layer and including an anode-side hole transport material. An electron accepting material is doped in the anode-side hole transport layer. An intermediate hole transport material layer is provided between the anode-side hole transport layer and the emission layer and includes an intermediate hole transport material, and an emission layer-side hole transport layer is provided between the intermediate hole transport material layer and the emission layer and adjacent to the emission layer.

Abstract: An amine derivative represented by the following General Formula (1) is provided. In the above General Formula (1), Ar1, Ar2 and Ar3 are independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, at least one of Ar1, Ar2 and Ar3 is substituted with a substituted or unsubstituted silyl group, and L is a single bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group.

Abstract: An organic electroluminescence device and a polycyclic compound, the device including a first electrode; a hole transport region on the first electrode; an emission layer on the hole transport region; an electron transport region on the emission layer; and a second electrode on the electron transport region, wherein the emission layer includes a polycyclic compound represented by the following Formula 1:

Abstract: An organic electroluminescence device includes a first electrode, a hole transport region, an emission layer including a nitrogen-containing compound, an electron transport region, and a second electrode. The nitrogen-containing compound may include a heterocyclic moiety and two carbazole moieties, the heterocyclic moiety may be a substituted pyridine, a substituted pyrimidine, or a substituted 1,3,5-triazine, each of two carbons among carbons of 2-, 4-, and 6-positions of the substituted pyridine, the substituted pyrimidine, or the substituted 1,3,5-triazine may be substituted with a phenylene group, a carbon in an ortho position of each phenylene group may be linked with a nitrogen at a 9-position of one of the carbazole moieties, and the remaining carbon among the carbons of the 2-, 4-, and 6-positions may be substituted with a substituted or unsubstituted aromatic group, and the carbazole moieties may be linked together by a linker.

Abstract: An organic electroluminescence device and a heterocyclic compound, the device including a first electrode; a hole transport region on the first electrode; an emission layer on the hole transport region; an electron transport region on the emission layer; and a second electrode on the electron transport region, wherein the emission layer includes a heterocyclic compound that includes a nitrogen-containing monocycle, at least one linker, and two or more carbazole moieties, the at least one linker is a substituted or unsubstituted dibenzofuran group or a substituted or unsubstituted dibenzothiophene group, and at least one of the carbazole moieties and the nitrogen-containing monocycle are bonded to the at least one linker in an ortho relationship.

Abstract: A silicon-containing compound represented by Formula 1 and an organic electroluminescence device including the same in at least one of a plurality of organic layers of the device are provided.

Abstract: An organic electroluminescent device of which emission life may be improved. The organic electroluminescent device includes an anode, an emission layer, and an anode-side hole transport layer provided between the anode and the emission layer and including an anode-side hole transport material. An electron accepting material is doped in the anode-side hole transport layer. An intermediate hole transport material layer is provided between the anode-side hole transport layer and the emission layer and includes an intermediate hole transport material, and an emission layer-side hole transport layer is provided between the intermediate hole transport material layer and the emission layer and adjacent to the emission layer. The emission layer-side hole transport layer includes an emission layer-side hole transport material represented by the following Formula 1.

Abstract: An organic electroluminescence device 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, wherein the emission layer includes a polycyclic compound containing two electron donors and one electron acceptor, and the electron acceptor includes a benzonitrile part and a pyridine part, thereby showing high emission efficiency.

Abstract: An organic electroluminescent device of which emission life may be improved. The organic electroluminescent device includes an anode, an emission layer, and an anode-side hole transport layer provided between the anode and the emission layer and including an anode-side hole transport material. An electron accepting material is doped in the anode-side hole transport layer. An intermediate hole transport material layer is provided between the anode-side hole transport layer and the emission layer and includes an intermediate hole transport material, and an emission layer-side hole transport layer is provided between the intermediate hole transport material layer and the emission layer and adjacent to the emission layer. The emission layer-side hole transport layer includes an emission layer-side hole transport material represented by the following Formula 1.

Abstract: Provided are a material for an organic electroluminescent device having a high emission efficiency and an organic electroluminescent device including the same. The material for an organic electroluminescent device according to the present disclosure is represented by Formula 1: in which dibenzoheterole groups are coupled to a phenyl group of a triarylamine at the ortho positions relative to the nitrogen atom. The polarity of the molecule may be increased due to the heteroatoms of the dibenzoheterole groups, and the energy gap (e.g., HOMO-LUMO gap) of the molecule may be increased due to the large steric distortion of the molecule around the amine group. Accordingly, the emission efficiency of an organic EL device may be improved in the blue emission region.

Abstract: A material for an organic electroluminescent device having high emission efficiency and long life, and an organic electroluminescent device including the same. The material for an organic electroluminescent device may be represented by Formula (1).

Abstract: An organic electroluminescent device of which emission life may be improved. The organic electroluminescent device includes an anode, an emission layer, and an anode-side hole transport layer provided between the anode and the emission layer and including an anode-side hole transport material. An electron accepting material is doped in the anode-side hole transport layer. An intermediate hole transport material layer is provided between the anode-side hole transport layer and the emission layer and includes an intermediate hole transport material, and an emission layer-side hole transport layer is provided between the intermediate hole transport material layer and the emission layer and adjacent to the emission layer. The emission layer-side hole transport layer includes an emission layer-side hole transport material represented by the following Formula 1.

Abstract: Provided are a material for an organic electroluminescent device having a high emission efficiency and an organic electroluminescent device including the same. The material for an organic electroluminescent device according to the present disclosure is represented by Formula 1: in which dibenzoheterole groups are coupled to a phenyl group of a triarylamine at the ortho positions relative to the nitrogen atom. The polarity of the molecule may be increased due to the heteroatoms of the dibenzoheterole groups, and the energy gap (e.g., HOMO-LUMO gap) of the molecule may be increased due to the large steric distortion of the molecule around the amine group. Accordingly, the emission efficiency of an organic EL device may be improved in the blue emission region.

Abstract: A silicon-containing compound which improves emission efficiency and an organic electroluminescence device including the same are provided. The silicon-containing compound according to the inventive concept is represented by Formula 1 below.