Abstract:
The present invention relates to a fabrication method of anode paste employing a silica/titanium dioxide core/shell nanoparticle as a light scattering material, and provides a distinct method of fabricating the paste by introducing the silica/titanium dioxide core/shell nanoparticle onto a titanium dioxide layer. According to the present invention, when the silica/titanium dioxide core/shell nanoparticle is used as the light scattering material in an appropriate ratio, a back scattering of the light occurs due to the difference of the refraction index of silica and titanium dioxide, thus limiting the light passing through. Thus, the efficiency of a dye sensitized solar cell can be improved.
Abstract:
본 발명은 광 산란과 표면 플라즈몬의 협력효과를 나타내는 금속 나노입자가 표면에 위치한 이산화티타늄 나노섬유를 포함하는 염료감응형 태양전지의 산화전극의 제조방법에 관한 것으로 다양한 크기를 가지는 이산화티타늄 나노섬유를 만들어 화학적 환원 방법으로 금속을 이산화티타늄 표면에 형성시켜 광 산란과 표면 플라즈몬 공명 협력효과를 나타내는 물질을 제조한다. 그 후 금속 나노입자가 표면에 위치한 이산화티타늄 나노섬유와 나노크기의 이산화티타늄 입자를 포함하는 페이스트와 혼합하여 염료감응 태양전지용 산화전극을 제조하여 고 효율의 태양전지를 제공하는 것이다. 금속 나노입자가 표면에 위치한 이산화티타늄 나노섬유는 입사된 태양광을 제한하고 산화전극 내에서 빛이 진행되는 길이가 늘어나도록 산란을 시켜주기 때문에 광전류 밀도 향상이 가능하며 뿐만 아니라 태양광의 흡수를 증대시키고 여기상태의 염료에서 이산화티타늄 전도대로 전자 이동속도가 빨라진다는 특징도 있다. 이러한 관점에서 보면 광산란과 표면 플라즈몬 현상의 협력효과를 나타내는 물질을 개발한다면 광전류 밀도가 향상될 것이고 최종적으로 높을 효율의 염료감응형 태양전지를 구현하게 될 것이다.
Abstract:
PURPOSE: Fabrication of titanium dioxide nanofiber containing zinc oxide nanoparticles and an antibactericidal application of the same are provided to easily fabricate titanium dioxide nanofiber containing zinc oxide nanoparticles using a mixed solution of a titanium dioxide precursor, a zinc oxide precursor, and a polymer. CONSTITUTION: Fabrication of titanium dioxide nanofiber includes the following steps of: preparing the mixed solution of a titanium dioxide precursor, a zinc oxide precursor, polymer, and acetic acid; preparing polymer nanofiber, in which the titanium dioxide precursor and the zinc oxide precursor are mixed, by an electrospinning method; forming titanium dioxide from the titanium dioxide precursor by hydrolysis; and preparing titanium dioxide nanofiber containing zinc oxide nanoparticles by thermally treatment. The sizes of the voltages in the electrospinning method are in a range between 1-60kV. The thermal treatment temperature is in a range between 400-550°C, and the thermal treatment time is in a range between 1 and 4 hours.
Abstract:
PURPOSE: A method for fabricating carbon dioxide nanofiber containing tin oxide nanoparticles is provided to enhance performance of decomposing organic materials. CONSTITUTION: A method for fabricating carbon dioxide nanofiber containing tin oxide nanoparticles comprises: a step of preparing a mixture solution containing titanium dioxide precursor, tin oxide precursor, polymers, and acetic acid; a step of electrospinning the mixture solution to prepare titanium dioxide precursor/tin oxide precursor/polymer nanofiber; a step of inducing hydrolysis of titanium dioxide precursor/tin oxide precursor/polymer nanofiber under the presence of moisture to form titanium dioxide; a step of inducing covalent bond of the hydroxyl group and tin oxide precursor to prepare titanium dioxide/tin oxide precursor/polymer nanofiber; and a step of performing thermal treatment of the nanofiber.