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Ag/TiO<sub>2</sub> 미세입자 합성물의 특성 분석
강경호 ( Kyungho Kang ),조용기 ( Yonggi Jo ),김순금 ( Sun-geum Kim ) 한국전기전자재료학회 2024 전기전자재료학회논문지 Vol.37 No.2
This study examines a manufacturing process for the photoelectrode material of dye-sensitized solar cell (DSSC) intending to increase efficiency through the surface plasmon resonance phenomenon of nanoparticles with a composite structure made of Ag and TiO<sub>2</sub>. This invention involves the use of Ag and TiO<sub>2</sub> nanoparticles in the solar cell. These nanoparticles cause surface plasmon resonance, which amplifies and scatters incident solar energy, enhancing the dye’s rate of light absorption. It also makes it possible to absorb energy in wavelength ranges that were previously difficult to do, which increases efficiency. Centrifugal separation and heat synthesis are used to create the composite metal structures, and certain combinations are used to decide the particle morphologies. To increase the efficiency of organic solar cells and DSSC, the Ag/TiO<sub>2</sub> composite structure is therefore quite likely to be used.
Grade II 순수 타이타늄의 단시간 양극산화에 의한 TiO<sub>2</sub> 나노튜브 형성
이광민,김용재,강경호,윤두현,노상현,강석일,유대흥,임현필,윤귀덕,박상원,김현승,Lee, Kwangmin,Kim, Yongjae,Kang, Kyungho,Yoon, Duhyeon,Rho, Sanghyun,Kang, Seokil,Yoo, Daeheung,Lim, Hyunpil,Yun, Kwiduk,Park, Sangwon,Kim, Hyun Seung 한국재료학회 2013 한국재료학회지 Vol.23 No.4
Electrochemical surface treatment is commonly used to form a thin, rough, and porous oxidation layer on the surface of titanium. The purpose of this study was to investigate the formation of nanotubular titanium oxide arrays during short anodization processing. The specimen used in this study was 99.9% pure cp-Ti (ASTM Grade II) in the form of a disc with diameter of 15 mm and a thickness of 1 mm. A DC power supplier was used with the anodizing apparatus, and the titanium specimen and the platinum plate ($3mm{\times}4mm{\times}0.1mm$) were connected to an anode and cathode, respectively. The progressive formation of $TiO_2$ nanotubes was observed with FE-SEM (Field Emission Scanning Electron Microscopy). Highly ordered $TiO_2$ nanotubes were formed at a potential of 20 V in a solution of 1M $H_3PO_4$ + 1.5 wt.% HF for 10 minutes, corresponding with steady state processing. The diameters and the closed ends of $TiO_2$ nanotubes measured at a value of 50 cumulative percent were 100 nm and 120 nm, respectively. The $TiO_2$ nanotubes had lengths of 500 nm. As the anodization processing reached 10 minutes, the frequency distribution for the diameters and the closed ends of the $TiO_2$ nanotubes was gradually reduced. Short anodization processing for $TiO_2$ nanotubes of within 10 minutes was established.