Abstract: An organic light-emitting device including a substrate; a first electrode on the substrate, the first electrode including a first surface and a second surface opposite to the first surface; an organic layer on the first electrode, the organic layer being adjacent to the first surface of the first electrode; a second electrode on the organic layer, the second electrode including a first surface adjacent to the organic layer and a second surface opposite to the first surface; and a luminescent efficiency improvement layer on at least one of the second surface of the first electrode and the second surface of the second electrode, the luminescent efficiency improvement layer including a condensed-cyclic compound represented by Formula 1, below:

Abstract: A compound for use in an organic light emitting device is represented by The compound has excellent electrical properties and charge transporting characteristics, and is therefore useful as a material for a hole injection layer, a hole transport layer, and an emission layer of phosphorescent and fluorescent devices for emitting light of all colors, including red, green, blue, and white. Organic light emitting devices using the compounds have high efficiency, low driving voltages, and high brightness.

Abstract: A condensed-cyclic compound and an OLED including the same, the condensed-cyclic compound represented by Formula 1 below:

Abstract: A heterocyclic compound represented by Formula 1 or Formula 2 below, an organic light-emitting device including the heterocyclic compound, and a flat display device including the organic light-emitting device: wherein Ar1 to Ar16, and R1 to R4 are defined as in the specification.

Abstract: A condensed-cyclic compound is represented by Formula 1 below. An organic light-emitting device includes the condensed-cyclic compound. A flat panel display apparatus includes the organic light-emitting device. The organic light-emitting device includes an organic layer including the compound of Formula 1 and has low driving voltage, high emission efficiency, and a long lifetime.

Abstract: A condensed-cyclic compound represented by Formula 1 below, an organic light-emitting device including the same, and a flat panel display apparatus including the organic light-emitting device: wherein, X, Y, A1, A2, L1, L2, L3, Ar1, R1, R2, R3, R4, R5, R6, a, b, c, d, e, f, and g are described in the detailed description of the invention. The organic light-emitting device including an organic layer including the compound above has low driving voltage, high emission efficiency, and long lifetime.

Abstract: A condensed-cyclic compound represented by Formula 1 below, an organic light-emitting device including the same, and a flat panel display apparatus including the organic light-emitting device: Wherein, X1, Ar1 Ar2, Ar3, Ar4, Ar5, Ar6, Ar7, Ar8, Ar9, Ar10, Ar11, and Ar12 are described in the detailed description of the invention. The organic light-emitting device including an organic layer including the compound above has low driving voltage and high emission efficiency.

Abstract: Provided are a compound represented by Formula 1 or 2 below and an organic light emitting device including an organic layer having the compound: where Ar1, Ar2, Ar3, R1, R2 and R3 are as described in the detailed description. Since the compound represented by Formula 1 or 2 has excellent electrical properties and excellent charge transport capabilities, the compound can be efficiently used as a hole injecting material, a hole transporting material, and/or an emitting material which is suitable for a fluorescent or phosphorescent organic light emitting device which can realize all colors such as red, green, blue, and white. Thus, an OLED including the compound can have high efficiency, high current density, low driving voltage, excellent brightness, and long lifetime.

Abstract: A novel fluorene-containing compound and an organic electroluminescent device including an organic layer employing the same. The fluorene-containing compound has excellent electrical characteristics and an excellent charge transporting capability, and so can be used as a hole injecting material, hole transporting material, and/or emitting material that is suitable for all-color fluorescent and phosphorescent devices, such as red, green, blue, and white fluorescent and phosphorescent devices. Accordingly, an organic electroluminescent device employing the fluorene-containing compound has high efficiency, a low driving voltage, high brightness, and a long lifetime.

Abstract: Provided are a heterocyclic compound represented by Formula 1 below and an organic electroluminescent device including an organic layer comprising the heterocyclic compound: wherein Ar1, Ar2, Ar3, R1, and R2 are the same as defined in the detailed description. The heterocyclic compound represented by Formula 1 has excellent electrical characteristics and an excellent charge transporting capability, and thus the heterocyclic compound of Formula 1 can be used as a hole injecting material, a hole transporting material, and/or a light emitting material that are suitable for all-color fluorescent and phosphorescent organic light emitting devices such as red, green, blue, and white fluorescent and phosphorescent organic light emitting devices. In addition, the organic electroluminescent device including an organic layer comprising the heterocyclic compound represented by Formula 1 can have a high efficiency, a low driving voltage, and high luminosity.

Abstract: A condensed-cyclic compound represented by Formula 1 below, and an organic light-emitting diode including the condensed-cyclic compound. wherein R1 through R6, Ar5 and Ar6, and X1 through X10 are defined as in the specification.

Abstract: A dendrimer and an organic light-emitting device including an organic layer having the dendrimer.

Abstract: A dendrimer and an organic light-emitting device including an organic layer having the dendrimer.

Abstract: Provided are a silicon-containing compound having carbazole and fluorene in its molecule and an organic electroluminescent device including an organic layer employing the same. The silicon-containing compound is represented by the following formula: The silicon-containing compound has excellent electrical characteristics and a charge transporting capability, the silicon-containing compound can be used as a hole injecting material, a hole transporting material, and/or a light emitting material that are suitable for all-color fluorescent and phosphorescent organic light emitting devices such as red, green, blue, and white fluorescent and phosphorescent organic light emitting devices. When the silicon-containing compound is used to manufacture an organic electroluminescent device, the organic electroluminescent device has a high efficiency, a low driving voltage, high luminosity, and a long lifetime.

Abstract: Provided are a silanylamine-based compound of Formula 1 and an organic light emitting diode including an organic layer having the same: wherein R1, R2, R3, R4, R5, R6, R7, R8, Ar1, Ar2, X and X? are described herein. Embodiments of the silanylamine-based compound of Formula 1 exhibit superior electrical properties and high charge-transport properties, and can be efficiently used as hole injecting materials, hole transporting materials, and/or emitting materials suitable for phosphorescent and fluorescent organic light emitting diodes emitting light of all colors, including red, green, blue, and white. Furthermore, an organic light emitting diode having the silanylamine-based compound of Formula 1 can have high efficiency, low driving voltage, and high brightness.

Abstract: A polymer represented by Formula 1 below: wherein functional groups and n are defined as in the specification.

Abstract: A condensed-cyclic compound and an OLED including the same, the condensed-cyclic compound represented by Formula 1 below:

Abstract: An organic light-emitting device including a substrate; a first electrode on the substrate, the first electrode including a first surface and a second surface opposite to the first surface; an organic layer on the first electrode, the organic layer being adjacent to the first surface of the first electrode; a second electrode on the organic layer, the second electrode including a first surface adjacent to the organic layer and a second surface opposite to the first surface; and a luminescent efficiency improvement layer on at least one of the second surface of the first electrode and the second surface of the second electrode, the luminescent efficiency improvement layer including a condensed-cyclic compound represented by Formula 1, below:

Abstract: A polymer and an organic light-emitting device including the polymer. An example of the polymer is wherein in Formula 1, Ar1 is each independently represented by —(Q1)n—, and Q1 is selected from the group consisting of a substituted or unsubstituted C5-C30 arylene group, a substituted or unsubstituted C4-C30 heteroarylene group, a substituted or unsubstituted C2-C30 alkenylene group, and a group represented by —N(Z1)—, and n is an integer from 1 to 10, and n groups of Q1 in -(Q1)n- is identical to or different from each other, and X1 and X2 are each independently selected from the, group consisting of —O—, —S—, —N(Z2)—, and —C(Z3)(Z4)—.

Abstract: A novel fluorene-containing compound and an organic electroluminescent device including an organic layer employing the same. The fluorene-containing compound has excellent electrical characteristics and an excellent charge transporting capability, and so can be used as a hole injecting material, hole transporting material, and/or emitting material that is suitable for all-color fluorescent and phosphorescent devices, such as red, green, blue, and white fluorescent and phosphorescent devices. Accordingly, an organic electroluminescent device employing the fluorene-containing compound has high efficiency, a low driving voltage, high brightness, and a long lifetime.