http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
셀레늄과 세라믹 혼합분말을 사용한 Cu<sub>0.9</sub>In<sub>0.7</sub>Ga<sub>0.3</sub>Se<sub>2</sub> 분말층의 소결거동 연구
송봉근,황윤정,박보인,이승용,이재승,박종구,이도권,조소혜,Song, Bong-Geun,Hwang, Yoonjung,Park, Bo-In,Lee, Seung Yong,Lee, Jae-Seung,Park, Jong-Ku,Lee, Doh-Kwon,Cho, So-Hye 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.3
$Cu(In,Ga)Se_2$ (CIGS) thin films have been used as a light absorbing layer in high-efficiency solar cells. In order to improve the quality of the CIGS thin film, often selenization step is applied. Especially when the thin film was formed by non-vacuum powder process, selenization can help to induce grain growth of powder and densification of the thin film. However, selenization is not trivial. It requires either the use of toxic gas, $H_2Se$, or expensive equipment which raises the overall manufacturing cost. Herein, we would like to deliver a new, simple method for selenization. In this method, instead of using a costly two-zone furnace, use of a regular tube furnace is required and selenium is supplied by a mixture of selenium and ceramic powder such as alumina. By adjusting the ratio of selenium vs. alumina powder, selenium vaporization can be carefully controlled. Under the optimized condition, steady supply of selenium vapor was possible which was evidently shown by large grain growth of CIGS within a thin powder layer.
백서에서 흡인된 티타니아 나노입자의 생체 내 분포에 관한 연구
최세훈,박계현,전상훈,김주현,정진행,조소혜,박종구,김태헌,Choi, Se-Hoon,Park, Kay-Hyun,Jheon, San-Hhoon,Kim, Joo-Hyun,Chung, Jin-Haeng,Cho, So-Hye,Park, Jong-Ku,Kim, Tae-Heon 대한기관식도과학회 2010 大韓氣管食道科學會誌 Vol.16 No.1
Titania nanomaterials are widely used as cosmetics and dyes, however the impacts on human health are uncertain, We investigated the biodistribution of inhaled titania nanoparticles in rats, Methods Eight weeks-old SD rats were intubated and inhaled with 3 mg titania nanoparticles, twice a week, for 2 weeks, After inhalation, the rats were sacrificed and tissues or heart, lung. intestine, brain, and liver were obtained, We investigated the tissues with optical microscope (OM), transmission electron microscope (EM), scanning EM, And to analyze titania concentration of each tissue, we lysed the tissues with radioimmunoprecipitation assay (RlPA) lysis buffer or acid. Results Granulation tissues in lung were confirmed on the optical microscope, however the other organs had no abnormalities in OM images, In EM images, the rats which inhaled titania nanoparticles showed calcium deposition at heart, brain, and intestine, Titania concentration in lung was increased on the inhaled rat sacrificed I month after last exposure. Conclusion Inhaled titania nanoparticles is thought to be deposited and make inflammatory reaction in lung, and the deposition was not efficiently cleared over a month. However inhaled titania nanoparticles may rarely pass through the alveolus-blood barrier and distribute to other organs of the bod.
텅스텐이 도핑된 티타니아 나노분말의 화학기상합성 및 광촉매 활성
박보인(Bo-in Park),강계명(Kae-Myung Kang),지현석(Hyunseock Jie),송봉근(Bong-Geun Song),박종구(Jong-Ku Park),조소혜(So-Hye Cho) 한국가스학회 2012 한국가스학회지 Vol.16 No.6
티타니아(TiO₂) 나노분말의 우수한 광촉매 활성은 이를 친환경 소재로서 많은 주목을 받도록 하였다. 특히, 최근 들어 이러한 TiO₂의 광촉매 활성을 향상시키기 위하여 TiO₂ 나노분말에 금속 혹은 비금속 원소를 도핑하는 방법이 널리 시도되고 있다. 화염법, 화학기상합성법, 졸-젤법, 공침법, 이온 주입법 등 다양한 방법들이 사용되고 있으며 합성법에 따라 원소들의 도핑 거동이 달라지므로 TiO₂의 전자구조 및 표면성질들이 합성법의 영향을 받게 되며 광촉매 활성 역시 달라진다. TiO₂의 광촉매 활성은 합성법 자체에 영향을 받는 것 외에 후속의 열처리에 의해서도 달라질 수 있다. 본 연구에서는 우수한 광촉매 활성을 가진 TiO₂ 나노분말 소재를 제조하기 위하여 화학기상 합성법(chemical vapor synthesis, CVS)으로 텅스텐(W) 원소가 도핑된 TiO₂ 나노분말을 제조하고 물성 및 광촉매 특성을 조사하였다. 일부의 TiO₂ 나노분말은 300℃~700℃ 범위에서 열처리한 후 물성 및 광촉매 특성의 변화를 조사하였다. Photocatalytic properties of TiO₂ nanopowders has been received much attention due to their high potentials for environmental applications such as remediation of polluted environments. The TiO₂ nanopowders doped with metal or non-metal elements have been synthesized by variety methods such as flame method, chemical vapor synthesis, sol-gel, ion implantation, which affect a doping behavior in different ways resulting in different surface characteristics, leading to different photocatalytic activity. In addition to an effect of synthesis methods, the photocatalytic activity of TiO₂ nanopowders can be improved by subsequent heat-treatments. In this study, to obtain a highly efficient photocatalyst, we synthesized TiO₂ nanopowders doped with tungsten by the chemical vapor synthesis method (CVS) and determined their physical properties and photocatalytic activity, together with subsequent post-treatment in the range of 300℃ to 700℃.
셀레늄과 세라믹 혼합분말을 사용한 Cu<SUB>0.9</SUB>In<SUB>0.7</SUB>Ga<SUB>0.3</SUB>Se₂ 분말층의 소결거동 연구
송봉근(Bong-Geun Song),황윤정(Yoonjung Hwang),박보인(Bo-In Park),이승용(Seung Yong Lee),이재승(Jae-Seung Lee),박종구(Jong-Ku Park),이도권(Doh-Kwon Lee),조소혜(So-Hye Cho) 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.3
Cu(In,Ga)Se₂ (CIGS) thin films have been used as a light absorbing layer in high-efficiency solar cells. In order to improve the quality of the CIGS thin film, often selenization step is applied. Especially when the thin film was formed by non-vacuum powder process, selenization can help to induce grain growth of powder and densification of the thin film. However, selenization is not trivial. It requires either the use of toxic gas, H₂Se, or expensive equipment which raises the overall manufacturing cost. Herein, we would like to deliver a new, simple method for selenization. In this method, instead of using a costly two-zone furnace, use of a regular tube furnace is required and selenium is supplied by a mixture of selenium and ceramic powder such as alumina. By adjusting the ratio of selenium vs. alumina powder, selenium vaporization can be carefully controlled. Under the optimized condition, steady supply of selenium vapor was possible which was evidently shown by large grain growth of CIGS within a thin powder layer.