Abstract:
Provided are a photosensor, a photosensor apparatus including the photosensor, and a display apparatus including the photosensor apparatus. The photosensor includes a substrate; a first light receiving layer which is formed on the substrate and comprises an oxide; a second light receiving layer which is connected to the first light receiving layer and comprises an organic material; and first and second electrodes which are respectively connected to the first and second light receiving layers.
Abstract:
Nicotinamide and/or a compound which is chemically combined with nicotinamide may be used as a carbon nanotube (“CNT”) n-doping material. CNTs n-doped with the CNT n-doping material may have long-lasting doping stability in the air without de-doping. Further, CNT n-doping state may be easily controlled when using the CNT n-doping material. The CNT n-doping material and/or CNTs n-doped with the CNT n-doping material may be used for various applications.
Abstract:
Provided are a method of doping a carbon nanotube (CNT) of a field effect transistor and a method of controlling the position of doping ions. The method may include providing a source, a drain, the CNT as a channel between the source and the drain, and a gate, applying a first voltage to the gate, and adsorbing ions on a surface of the CNT.
Abstract:
A convertible logic circuit includes a plurality of carbon nanotube transistors. Each carbon nanotube transistors are configurable as p-type or an n-type transistors according to a voltage of a power source voltage. Each carbon nanotube transistor includes a source electrode, a drain electrode, a channel formed of a carbon nanotube between the source electrode and the drain electrode, a gate insulating layer formed on the carbon nanotubes, and a gate electrode formed on the gate insulating layer.
Abstract:
Disclosed is a method of encapsulating a carbon material within aluminum, the method including the steps of: (i) functionalizing a carbon material by introducing a defect therein; (ii) mixing the functionalized carbon material with aluminum; and (iii) ball milling the mixture under an inert gas atmosphere. In addition, the present invention discloses a method of fabricating an aluminum-carbon material composite, the method comprising the steps of: (i) functionalizing the carbon material by introducing a defect therein; (ii) mixing the functionalized carbon material with aluminum; and (iii) ball milling the mixture under an inert gas atmosphere, thereby encapsulating a carbon material within aluminum. Furthermore, the present invention discloses an aluminum-carbon material composite fabricated according to the method.
Abstract:
A method to manufacture a carbon fiber electrode comprises synthesizing polyamic acid (PAA) as a polyimide (PI) precursor from pryomellitic dian hydride (PMDA) and oxydianiline (ODA) as monomers and triethylamine (TEA) as a catalyst, adding dimethylformamide (DMF) to the polyamic acid (PAA) solution to prepare a spinning solution and subjecting the spinning solution to electrostatic spinning at a high voltage to obtain a PAA nanofiber paper, converting the PAA nanofiber paper into a polyimide (PI) nanofiber paper by heating, and converting the polyimide (PI) nanofiber paper into a carbon nanofiber (CNF) paper by heating under an Ar atmosphere. Also, the method to manufacture a polyimide carbon nanofiber electrode and/or a carbon nanotube composite electrode may utilize carbon nanofibers having diameters that are lessened by optimizing electrostatic spinning in order to improve spinnability.
Abstract:
Disclosed are a solar cell manufactured using a composite thin film comprising amorphous silicon and nanocrystalline silicon, a method of manufacturing the solar cell, and a composition for the composite thin film used in manufacturing the solar cell. More particularly, a silicon semiconductor layer in the solar cell is fabricated by using the composite thin film comprising the amorphous silicon and the nanocrystalline silicon, the composite thin film being formed by dispersing nanoparticles of the crystalline silicon in a liquid silicon precursor and modifying them.The solar cell of the present invention is manufactured by dispersing the crystalline silicon nanoparticles in the liquid silicon precursor, coating the dispersion on a substrate or printing the substrate with the dispersion, and heating the coated or printed substrate to modify the liquid silicon precursor into the amorphous silicon.According to the present invention, any expensive equipment requiring alternative complicated installations is not needed to form a composite thin film comprising both of amorphous silicon and crystalline silicon. In addition, it is possible to form a composite thin film comprising plural materials with different band gap energy which can remarkably improve conversion efficiency of a solar cell by using a liquid precursor and nanocrystalline particles in a solution process with low production cost.
Abstract:
Provided is a nanocomposite for the catalyst layer of a fuel cell electrode including: a carbon nanofiber; and metal catalyst particles uniformly applied to the surface of the carbon nanofiber, wherein the carbon nanofiber has a surface oxygen content of at least 0.03 calculated by the formula: Oxygen content=[atomic percentage of oxygen/atomic percentage of carbon] using atomic percentages of oxygen and carbon, respectively calculated from an area of an oxygen peak having a binding energy of 524 to 540 eV, an area of a nitrogen peak having a binding energy of 392 to 404 eV, and an area of a carbon peak having a binding energy of 282 to 290 eV in X-ray photoelectron spectroscopy. The nanocomposite according to the present invention has high surface oxygen content and has metal catalyst nano particles densely and uniformly distributed on the outer wall of the carbon fibers, thereby having high electrochemical efficiency. Thus, efficiency of fuel cells can be improved using the nanocomposite.
Abstract:
Semiconductor carbon nanotubes functionalized by hydrogen and a method for fabricating the same, wherein the functional hydrogenated semiconductor carbon nanotubes have chemical bonds between carbon and hydrogen atoms. The semiconductor carbon nanotube fabricating method includes heating carbon nanotubes in a vacuum, dissociating hydrogen molecules in hydrogen gas into hydrogen atoms, and exposing the carbon nanotubes to the hydrogen gas to form chemical bonds between carbon atoms of the carbon nanotubes and the hydrogen atoms. The conversion of metallic carbon nanotubes into semiconductor nanotubes and of semiconductor nanotubes having a relatively narrow energy bandgap into semiconductor nanotubes having a relative wide energy bandgap can be achieved using the method. The functional hydrogenated semiconductor carbon nanotubes may be applied and used in, for example, electronic devices, optoelectronic devices, and energy storage.
Abstract:
A fixed-point cell for connection with a thermometer protecting tube and apparatus for estimating the lifetime of thermometerin the thermometer protecting tube including: a reference temperature material layer made of high-purity metallic materials to indicate a reference temperature based on a phase change of material, which coexists in a two-phase or three-phase state; a container part of a multiple structure having the reference temperature material layer embedded and sealed therein for achieving thermal correlation between the reference temperature material layer and the thermometer protecting tube having a thermometer contained therein, the thermometer protecting tube being inserted into the central hole of the fixed-point cell while being in contact with the inner circumference of the container part; and fixing devices disposed on the top portion of the container part for fixing the thermometer protecting tube to the container part in a fastening manner.