Abstract: An organic light emitting display device comprising a first electrode; a hole transport layer, an emitting layer and an electron transport layer disposed sequentially on the first electrode; and a second electrode formed on the electron transport layer, wherein the emitting layer comprises a host material comprising a calixarene compound represented by Chemical Formula (1) wherein, in the Chemical Formula (1), each of R1 to R4 independently represents hydrogen, deuterium, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C3-C50 cycloalkyl group, a substituted or unsubstituted C1-C50 alkoxy group, a substituted or unsubstituted C5-C50 aryloxy group, a substituted or unsubstituted C5-C50 arylthio group, a unsubstituted C6-C60 aryl group, a C6-C60 aryl group substituted with an aryl group, a C6-C60 aryl group substituted with a polyaromatic group, a C5-C50 amino group substituted with an aryl group, a C4-C60 unsubstituted heteroaryl group, a C4-C60 heteroaryl group substituted

Abstract: Provided are a heterocyclic compound represented by Formula 1 below, and an organic light-emitting diode and a flat display device each including the heterocyclic compound. The organic light-emitting diode including an organic layer including the heterocyclic compound has a low driving voltage, high luminescence efficiency, and long lifetime.

Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including an organic layer that includes the following heterocyclic compound: wherein R1 to R13 are each independently a hydrogen atom, a heavy hydrogen atom, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C5-C60 aryloxy group, a substituted or unsubstituted C5-C60 arylthio group, a substituted or unsubstituted C5-C60 aryl group, an amino group substituted with a C5-C60 aryl group or a C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C6-C60 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxy group, or a carboxy group.

Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the heterocyclic compound: wherein R1 to R13 are defined as in the specification.

Abstract: A full color organic light emitting diode having high efficiency and high color purity while having low manufacturing costs due to simple manufacturing processes.

Abstract: Embodiments of the present invention are directed to a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

Abstract: A heterocyclic compound, an organic light-emitting diode, and a flat display device, the heterocyclic compound being represented by Formula 1, below:

Abstract: A heterocyclic compound, an organic light-emitting diode, and a flat display device, the heterocyclic compound being represented by Formula 1, below:

Abstract: Embodiments of the present invention are directed to a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

Abstract: A heterocyclic compound, organic light-emitting device, and a flat panel display device, the heterocyclic compound being represented by Formula 1 or 2 below:

Abstract: A condensed-cyclic compound and an organic light-emitting diode including the same.

Abstract: A heterocyclic compound includes compounds represented by Formula 1 or Formula 2 below:

Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the heterocyclic compound: wherein R1 and R2, and A and A? are defined as in the specification.

Abstract: Embodiments of the present invention are directed to heteroarylamine compounds and organic light-emitting devices including the heteroarylamine compounds. The organic light-emitting devices using the heteroarylamine compounds have high-efficiency, low driving voltages, high luminance and long lifespans.

Abstract: Embodiments of the present invention are directed to a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

Abstract: Embodiments of the present invention are directed to a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltages, high luminance and long lifespans.

Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the heterocyclic compound: wherein Ar1, Ar2, X, and R1 to R5 are defined as in the specification.

Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the heterocyclic compound: wherein R1 to R12 are defined as in the specification.

Abstract: A heterocyclic compound represented by a general Formula 1 and an organic light-emitting device including the heterocyclic compound. In some embodiments the heterocyclic compound of Formula 1 may be used as a light-emitting material, a hole transporting material, or an electron transporting material. The heterocyclic compound of Formula 1 having a heterocyclic group in the molecules thereof has a high glass transition temperature (Tg) or a high melting point due to the inclusion of the heterocyclic group. Thus, the heterocyclic compound has high heat resistance against Joule's heat generated in an organic layer, between organic layers, or between an organic layer and a metal electrode when light emission occurs, and has high durability in high-temperature environments. An organic light-emitting device manufactured using the heterocyclic compound of Formula 1 has high durability when stored or operated.

Abstract: A condensed-cyclic compound of Formula 1, an organic light-emitting diode (OLED) including the same and a flat panel display device including the OLED. The condensed-cyclic compound of Formula 1 may be used in an organic light-emitting diode. Accordingly, an OLED according to an embodiment of the present invention includes a first electrode, a second electrode disposed opposite to the first electrode, and a first layer interposed between the first electrode and the second electrode, wherein the first layer includes the condensed-cyclic compound represented by Formula 1. The OLED may further include at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an emission layer, a hole blocking layer, an electron transport layer and an electron injection layer.