Abstract: An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode; and a hole transport region between the first electrode and the emission layer, wherein the emission layer includes a first compound represented by Formula 1, and the hole transport region includes a second compound represented by Formula 2:

Abstract: An organic light-emitting device including a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode and including an emission layer, wherein the organic layer includes a first compound represented by one selected from Formulae 1-1 and 1-2, and a second compound represented by one selected from Formulae 2-1 to 2-3: An organic light-emitting device including the first compound as host in the emission layer and the second compound in the hole transport region may have high efficiency and a long lifespan.

Abstract: An organic light-emitting device including a first electrode; a second electrode; and an organic layer including an emission layer between the first electrode and the second electrode; wherein the organic layer includes a first compound represented by Formula 1 and a second compound represented by one selected from Formulae 2-1 to 2-3:

Abstract: An organic light-emitting device including: a first electrode; a second electrode; and an organic layer including an emission layer between the first electrode and the second electrode. The organic layer may include at least one compound selected from a first compound and a second compound, in addition to a third compound.

Abstract: The present disclosure relates to a metal-organic framework and a method for preparing the same. In accordance with the present disclosure, a metal-organic framework having large specific surface area can be prepared and the prepared porous material exhibits high carbon dioxide and carbon monoxide adsorption characteristics at room temperature.

Abstract: Disclosed is a method of manufacturing carbonized fine cellulose, which enables the formation of carbonized nano-sized cellulose by subjecting cellulose to drying, carbonization, and pulverization by means of shock waves using ultrasonic waves and microbubbles, thus realizing mass producibility, making it possible to fabricate a carbonized nano-sized material having uniform quality, and reducing the manufacturing costs. The carbonized fine cellulose is in the form of a nano-sized uniform carbon powder, and can thus be utilized as a catalyst support in various forms, such as fuel cell electrodes, electrodes of energy storage devices such as supercapacitors or secondary batteries, catalyst supports for micro-nano hybrid reactors, etc.

Abstract: An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer, wherein the organic layer includes a first compound selected from organometallic compounds represented by Formula 1, and a second compound selected from compounds represented by Formulae 2 and 3: M1(L1)n1(L2)(L3)??Formula 1

Abstract: A metal-carbon composite supported catalyst for hydrogen production using co-evaporation and a method of preparing the same, wherein the catalyst is configured such that a metal-carbon composite having a core-shell structure resulting from co-evaporation is supported on the surface of an oxide-based support coated with carbon, thereby maintaining superior durability without agglomeration even in a catalytic reaction at a high temperature. Because part or all of the surface of metal is covered with the carbon shell, even when the catalyst is applied under severe reaction conditions including high temperatures, long periods of time, acidic or alkaline states, etc., the metal particles do not agglomerate or are not detached, and do not corrode, thus exhibiting high performance and high durability. Therefore, inactivation of the catalyst or the generation of side reactions can be prevented, so that the catalyst can be efficiently utilized in hydrogen production.

Abstract: A method for preparing a carbon dioxide absorbent based on natural biomass, and a carbon dioxide absorbent based on natural biomass that is prepared by the method. The method utilizes alkali metal or alkaline earth metal components, such as Ca, Ma and K, inherent to a natural plant biomass material. The method can provide a carbon dioxide absorbent with improved performance in an environmentally friendly manner at greatly reduced cost.

Abstract: Provided is a method of synthesizing boron nitride, comprising the steps of: preparing a boron compound and a nitrogen compound; mixing the boron compound and the nitrogen compound in a non-aqueous solvent; forming an ester compound by melting the mixture in the non-aqueous solvent; dehydrating the ester compound; and forming boron nitride by nitriding the ester compound in a reductive atmosphere.

Abstract: Disclosed is a method of forming a nitrogen-doped porous graphene envelope. The method of forming the nitrogen-doped porous graphene envelope includes dissolving a nitrogen precursor in an organic precursor and then vaporizing the resulting precursor to thus simultaneously synthesize the graphene envelope and perform nitrogen doping in a single step.

Abstract: An organic light-emitting device includes a first electrode; a second electrode; an organic layer between the first electrode and the second electrode; and a light efficiency-improvement layer disposed on the first electrode or the second electrode. The light efficiency-improvement layer includes a heterocyclic compound represented by Formula 1, which is described in more detail in the detailed description section of the present application.

Abstract: The present invention relates to a method and a kit for monitoring an immune status after transplant. The kit for monitoring an immune status after transplant and the method for monitoring an immune status of an individual after transplant as provided in the present invention make it easy and accurate to determine an immune status in the individual after transplant and thus have an effect of reducing overuse of an immunosuppressive agent prescribed after transplant and also have an effect of conveniently managing an immune status of each patient.

Abstract: An organic light emitting diode comprises a first electrode; a second electrode; and an organic layer comprising a first hole-transporting host, a second electron-transporting host, and a phosphorescent guest, and arranged between the first electrode and the second electrode, wherein the first hole-transporting host comprising at least one selected from the group consisting of compounds expressed by chemical formulas 1 and 2 below, wherein in the chemical formulas 1 and 2, A, L, and R1 to R20 are defined the same as in the specification.

Abstract: A fluorene-based compound represented by Formula 1 below and an organic light-emitting device (OLED) including the fluorene-based compound. wherein R1 to R3, R10 to R17 and a, b, c, d, e, and f are defined as in the specification.

Abstract: Provided are a carbon electrode particularly suitable to be used as a negative electrode of an energy storing apparatus and the like and a method for manufacturing the same by forming the carbon electrode by heat-treating a natural carbon material such as a natural fiber sheet including a natural fiber or cellulose sheet including a natural cellulose fiber which is a natural material other than a petroleum-based material or a petroleum-based synthetic material to reduce manufacturing cost, shorten a manufacturing process, minimize discharge of a hazardous substance, and uniformly maintain storage capacitance even in repeated charging and discharging when being applied to the energy storing apparatus. The carbon electrode includes any one of an alkali metal particle and an alkali earth metal particle having an average particle size of less than 100 nm which is formed on a surface in a process of carbonizing a natural carbon material.

Abstract: The invention is directed to bipyridine-based compound and organic light emitting diodes (OLED) including organic layers having the bipyridine-based compound. OLEDs including organic layers having the bipyridine-based compounds can have low driving voltages, high current densities, high efficiencies and long lifetimes.

Abstract: A composite synthesis method and apparatus, a vaporizer for the composite synthesis apparatus, a vaporizer heater and a composite. In the composite synthesis apparatus using simultaneous vaporization, two or more vaporizers are heated by heaters such that samples vaporized by the vaporizers are supplied into a reactor to synthesize a composite. The apparatus and method may prepare multiple-metal or metal-carbon heterogeneous composites, and may be applied to various metal- and carbon-based adsorbents, absorbents, gas/liquid separation membranes and various catalyst processes. Further, the composite may be applied to various industrial fields through change in metal components or carbon structures.

Abstract: The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.

Abstract: The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.