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 hole transport region includes a polycyclic compound represented by Formula 1, and the device shows high emission efficiency:

Abstract: A diagnostic imaging catheter is disclosed, which is capable of preventing a solution from an internal space of a hub from flowing into a portion communicating with the internal space of the hub and to which the signal lines such as the optical fiber and the electric signal cable are electrically or optically connected. The optical diagnostic catheter includes a rotatable drive shaft, an elongated sheath configured to be inserted into a biological lumen, a hub that includes a port connected to the sheath for supplying the solution, a connector portion that includes an optical connector accommodated in an internal space of the hub and optically connected to an external optical connector, a first seal portion that prevents the solution from the port from flowing into a first connection portion, and a second seal portion that prevents the solution from the port from flowing into a second connection portion.

Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode provided on the first electrode, and a plurality of organic material layers provided between the first electrode and the second electrode, wherein at least one organic material layer among the plurality of organic material layers include a monoamine compound, and the monoamine compound includes a core structure including two condensed rings which are combined to form a spiro structure, where each condensed ring has a condensed structure of three or more pentagonal or hexagonal rings. High emission efficiency may be achieved.

Abstract: A light emitting device, includes: a first electrode; a second electrode disposed on the first electrode; and at least one functional layer disposed between the first electrode and the second electrode and including an amine compound of Formula 1: in Formula 1, the variables are described herein.

Abstract: A light emitting device includes: a first electrode; a second electrode facing the first electrode; and a plurality of organic layers disposed between the first electrode and the second electrode, wherein at least one of the organic layers includes a compound including a nitrogen moiety, and the compound is of Formula 1 below: wherein, in Formula 1, the variables are defined herein.

Abstract: An organic electroluminescence device of an embodiment includes a first electrode and a second electrode facing each other, and at least one organic layer disposed between the first electrode and the second electrode, wherein at least one organic layer includes a condensed cyclic compound represented by Formula 1, thereby showing improved device efficiency and life.

Abstract: A light emitting device of an embodiment includes a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode. The at least one functional layer includes a polycyclic compound represented by Formula 1, thereby showing high emission efficiency properties and improved life characteristics.

Abstract: An organic electroluminescence device of an embodiment includes a first electrode and a second electrode facing each other, and at least one organic layer disposed between the first electrode and the second electrode, wherein at least one organic layer includes a condensed cyclic compound represented by Formula 1, thereby showing improved device efficiency and life.

Abstract: A light emitting diode of an embodiment includes a first electrode, a second electrode, and at least one functional layer disposed between the first electrode and the second electrode and including an amine compound represented by Formula 1, thereby showing high emission efficiency properties and improved life characteristics.

Abstract: A luminescence 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 hole transport region includes an amine compound represented by Formula 1, thereby providing high emission efficiency.

Abstract: A light emitting device includes a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode. The at least one functional layer includes a polycyclic compound represented by Formula 1, thereby providing a light emitting device having high luminous efficiency and improved life characteristics.

Abstract: An organic electroluminescence device includes an amine compound represented by Formula 1 below in at least one organic layer among a plurality of organic layers, and an amine compound represented by Formula 1: where R1 to R3, Ar1, Ar2, n, m, L and X are as defined in the specification.

Abstract: An monoamine compound and an organic electroluminescence device including the monoamine compound, the monoamine compound being represented by the following Formula 1:

Abstract: An amine compound which improves emission efficiency and an organic electroluminescence device including the same are provided. The amine compound is represented by the structure below, wherein X is O or S, Y is C or Si, each of Ar1 and Ar2 is independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 50 carbon atoms for forming a ring, which includes O or S as a heteroatom, and each of L1 and L2 is independently a direct linkage, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroarylene group having 2 to 30 carbon atoms for forming a ring. R1 through R5 are defined in the description.

Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and a plurality of organic layers disposed between the first electrode and the second electrode, wherein at least one among the plurality of organic layers includes an amine compound represented by Formula 1a, thereby showing excellent emission efficiency and/or improved life characteristics:

Abstract: An amine compound which improves emission efficiency and an organic electroluminescence device including the same are provided. The amine compound is represented by the structure below, wherein X is O or S, Y is C or Si, each of Ar1 and Ar2 is independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 50 carbon atoms for forming a ring, which includes O or S as a heteroatom, and each of L1 and L2 is independently a direct linkage, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroarylene group having 2 to 30 carbon atoms for forming a ring. R1 through R5 are defined in the description.

Abstract: An organic electroluminescence device and an amine compound for an organic electroluminescence device are provided. The amine compound according to an embodiment of the present disclosure is represented by Formula 1.

Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and a plurality of functional layers between the first electrode and the second electrode, wherein at least one functional layer selected from the plurality of functional layers includes an amine compound represented by Formula 1 below, thereby showing high emission efficiency and improved life characteristics:

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 hole transport region includes a monoamine compound represented by Formula 1, thereby providing high emission efficiency:

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 hole transport region includes a polycyclic compound of Formula 1: wherein, in Formula 1, the variables are defined herein.