Abstract: An organic light-emitting device includes an emission layer between first and second electrodes, a first hole transport layer that is between the emission layer and the first electrode and that includes a first hole transport compound and a first electron acceptor, a second hole transport layer that is between the emission layer and first hole transport layer and that includes a second hole transport compound, a third hole transport layer that is between the emission layer and the second hole transport layer and that includes a third hole transport compound and a second electron acceptor, a fourth hole transport layer that is between the emission layer and the third hole transport layer and that includes a fourth hole transport compound, a buffer layer between the emission layer and the fourth hole transport layer, and an electron transport layer that includes a pyrimidine-based compound.

Abstract: An organic light emitting display includes a substrate; a first pixel electrode disposed on the substrate; a second pixel electrode disposed on the substrate; a hole auxiliary layer disposed on the first pixel electrode and the second pixel electrode; a first organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode; a blue organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode, the blue organic emission layer being further disposed on the first organic emission layer; a non-doping blue organic emission layer disposed on the blue organic emission layer; an electron auxiliary layer disposed on the non-doping blue organic emission layer; and a common electrode disposed on the electron auxiliary layer.

Abstract: Provided is an example method of preparing a porous metal oxide structure, the method including adsorbing a metal oxide precursor onto a template having a networked structure of branched polynucleotides, decomposing and converting the adsorbed metal oxide precursor into a metal oxide, and removing the template. The networked structure of branched polynucleotides may be used as a template so as to facilitate control of the pore structure of a porous metal oxide structure.

Abstract: Provided is a method of preparing a porous metal material. The method includes: obtaining a composite of a DNA hydrogel and a metal precursor by mixing the DNA hydrogel and the metal precursor; and reducing the composite of the DNA hydrogel and the metal precursor.

Abstract: Provided is an example method of preparing a porous metal oxide structure, the method including adsorbing a metal oxide precursor onto a template having a networked structure of branched polynucleotides, decomposing and converting the adsorbed metal oxide precursor into a metal oxide, and removing the template. The networked structure of branched polynucleotides may be used as a template so as to facilitate control of the pore structure of a porous metal oxide structure.

Abstract: An organic light-emitting diode including a film having a thermal evaporation material and metal particles between a first electrode and a substrate and/or on a second electrode.

Abstract: An organic light emitting diode display includes a p-doped layer that can obtain high efficiency at low-voltage driving and low current and prevent leakage current by differentially forming the p-doped layer for each pixel.

Abstract: An organic light emitting diode display includes a p-doped layer that can obtain high efficiency at low-voltage driving and low current and prevent leakage current by differentially forming the p-doped layer for each pixel.

Abstract: Provided are apparatus and methods for forming phase change layers, and methods of manufacturing a phase change memory device. A source material is supplied to a reaction chamber, and purges from the chamber. A pressure of the chamber is varied according to the supply of the source material and the purge of the source material.

Abstract: An electro-conductive hydrogel composite material that may be suitable as an artificial skin satisfies all four requirements of artificial skin, namely, flexibility, electrical conductivity, healing property, and biocompatibility. The electro-conductive hydrogel composite material includes a hydrogel composition including water and a cross-linkable polymer which reversibly forms cross-linkage by hydrogen bonding; and an electro-conductive material dispersed in the hydrogen bond-based hydrogel.

Abstract: An organic light-emitting device includes a first electrode, a second electrode, and an organic layer interposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, the emission layer includes a compound represented by Formula 2 below, and a second layer including a heterocyclic compound represented by Formula 1 below either between the emission layer and the first electrode or between the emission layer and the second electrode. Formula 1 and Formula 2 are defined in the same manner as described in the detailed description.

Abstract: An organic light emitting display includes a substrate; a first pixel electrode disposed on the substrate; a second pixel electrode disposed on the substrate; a hole auxiliary layer disposed on the first pixel electrode and the second pixel electrode; a first organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode; a blue organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode, the blue organic emission layer being further disposed on the first organic emission layer; a non-doping blue organic emission layer disposed on the blue organic emission layer; an electron auxiliary layer disposed on the non-doping blue organic emission layer; and a common electrode disposed on the electron auxiliary layer.

Abstract: An organic light emitting device that obtains stable image qualities through prevention of any significant decrease in brightness at high temperature. The organic light emitting device includes an anode; a cathode facing the anode; an organic emitting layer interposed between the anode and the cathode; an electron transport layer interposed between the organic emitting layer and the cathode and comprising an alkali metal compound or an alkali earth metal compound; and a buffer layer interposed between the organic emitting layer and the electron transport layer.

Abstract: An organic light emitting diode display including a substrate, a first electrode on the substrate, a light-emitting layer on the first electrode, a second electrode on the light-emitting layer, and a p-doping layer between the first electrode and the light-emitting layer.

Abstract: Provided are a nanoparticle assembly including a DNA hydrogel and gold nanoparticles, methods of preparing thereof, and an active material delivering composite including the same. The nanoparticle assembly has an excellent biocompatibility, an ability to prevent an accumulation of the nanoparticle assembly in a body, and is capable of being used to provide physical and chemical treatment.

Abstract: A semiconductor device includes a switching device disposed on a substrate. A buffer electrode pattern is disposed on the switching device. The buffer electrode pattern includes a first region having a first vertical thickness, and a second region having a second vertical thickness smaller than the first vertical thickness. A lower electrode pattern is disposed on the first region of the buffer electrode pattern. A trim insulating pattern is disposed on the second region of the buffer electrode pattern. A variable resistive pattern is disposed on the lower electrode pattern.

Abstract: Provided is an organic light emitting diode that is highly efficient and has a long lifespan. The organic light emitting diode includes a carbazole-based compound for improving light emission efficiency. In certain embodiments an electron transport layer can include an anthraces-based compound. The organic light emitting diode may be included in a flat display diode including a thin film transistor (TFT).

Abstract: A conductive pattern on a substrate is formed. An insulating layer having an opening exposing the conductive pattern is formed. A bottom electrode is formed on the conductive pattern and a first sidewall of the opening. A spacer is formed on the bottom electrode and a second sidewall of the opening. The spacer and the bottom electrode are formed to be lower than a top surface of the insulating layer. A data storage plug is formed on the bottom electrode and the spacer. The data storage plug has a first sidewall aligned with a sidewall of the bottom electrode and a second sidewall aligned with a sidewall of the spacer. A bit line is formed on the data storage plug.

Abstract: A method of forming a variable resistance memory device includes forming an opening in an insulating layer, and forming a variable resistance layer by filling the opening with an antimony rich antimony-tellurium compound.

Abstract: In an aspect, a deposition apparatus including a deposition chamber, a first group deposition source unit, and a second group deposition source unit is provided. The deposition chamber may include a first standby area, a deposition area, and a second standby area. The deposition area may be located between the first and second standby areas. The first group deposition source unit may move to the deposition area from the first standby area and provides a first group deposition material to a base member located in the deposition area. The second group deposition source unit may move to the deposition area from the second standby area and provides a second group deposition material to the base member.