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마그네트론 코스퍼터링법으로 형성한 SiO<sub>2</sub>/Si 양자점 초격자 구조의 특성
박영빈,김신호,하린,이현주,이정철,배종성,김양도,Park, Young-Bin,Kim, Shin-Ho,Ha, Rin,Lee, Hyun-Ju,Lee, Jung-Chul,Bae, Jong-Seong,Kim, Yang-Do 한국재료학회 2010 한국재료학회지 Vol.20 No.11
Solar cells have been more intensely studied as part of the effort to find alternatives to fossil fuels as power sources. The progression of the first two generations of solar cells has seen a sacrifice of higher efficiency for more economic use of materials. The use of a single junction makes both these types of cells lose power in two major ways: by the non-absorption of incident light of energy below the band gap; and by the dissipation by heat loss of light energy in excess of the band gap. Therefore, multi junction solar cells have been proposed as a solution to this problem. However, the $1^{st}$ and $2^{nd}$ generation solar cells have efficiency limits because a photon makes just one electron-hole pair. Fabrication of all-silicon tandem cells using an Si quantum dot superlattice structure (QD SLS) is one possible suggestion. In this study, an $SiO_x$ matrix system was investigated and analyzed for potential use as an all-silicon multi-junction solar cell. Si quantum dots with a super lattice structure (Si QD SLS) were prepared by alternating deposition of Si rich oxide (SRO; $SiO_x$ (x = 0.8, 1.12)) and $SiO_2$ layers using RF magnetron co-sputtering and subsequent annealing at temperatures between 800 and $1,100^{\circ}C$ under nitrogen ambient. Annealing temperatures and times affected the formation of Si QDs in the SRO film. Fourier transform infrared spectroscopy (FTIR) spectra and x-ray photoelectron spectroscopy (XPS) revealed that nanocrystalline Si QDs started to precipitate after annealing at $1,100^{\circ}C$ for one hour. Transmission electron microscopy (TEM) images clearly showed SRO/$SiO_2$ SLS and Si QDs formation in each 4, 6, and 8 nm SRO layer after annealing at $1,100^{\circ}C$ for two hours. The systematic investigation of precipitation behavior of Si QDs in $SiO_2$ matrices is presented.
박영빈(Young Bin Park),양윤경(Yun Kyoung Yang),박주영(Ju Young, Park),박진철(Jin Chul, Park) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
This study was intended to propose direction of facility improvement for the creation of zero-energy school facilities, in summary, as follows. In other words, most school facilities were rated 1++ (80 - 140 kWh/m22r) after checking the current 715 energy performance levels of school facilities. In particular, it was confirmed that the building has a higher energy efficiency rating than other buildings due to the high application of passive elements, such as EHP, GHP, and high efficiency materials such as LED lighting, and new and renewable energy.
심전도와 호흡신호를 동시에 모니터링 가능한 치과용 체어 시스템
박영빈(Young-Bin Park),조봉균(Bong-Gyun Jo),이태균(Tae-Gyoun Lee),박준석(Jun-Suk Park),정현영(Hyun-young Jung),김민규(Min-Kyu Kim),박광범(Kwang-Bum Park) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6
Dentistry has improved various medical instruments for patients and doctor. However, instruments which monitor ECG, respiratory signal for checking stress and body transformation, etc of patients need a lot of improvement. In this paper, proposed system measures ECG and respiratory signal with non-contact back plate sensor and wrists sensor. The system is used for dental chair.
박영빈(Young-Bin Park),김문상(Moon-Sang Kim),김학봉(Hark-Bong Kim) 한국항공우주학회 2005 韓國航空宇宙學會誌 Vol.33 No.12
타원형 실린더의 두께와 받음각 및 레이놀즈수가 실린더에 작용하는 항력과 양력에 어떤 영향을 미치는가를 고찰하기 위해서 수치적 연구를 수행하였다. 타원형 실린더 주위를 흐르는 비정상 점성 유동을 해석하기 위하여 SIMPLER 기법을 이용한 2차원 비압축성 Navier-Stokes 유동 해석 프로그램을 개발하였으며, 두께-시위길이 비가 0.2, 0.4, 0.6인 타원형 실린더 형상에 대해서 레이놀즈수가 400, 600인 조건, 그리고 받음각이 10도, 20도, 30도인 조건하에서 유동을 해석하였다. 본 연구를 통해서 실린더 두께 비와 받음각 및 레이놀즈수가 항력과 양력 계수의 시간 평균값 및 진폭의 크기, 그리고 진동 주기에 크게 영향을 미침을 확인할 수 있었다. A parametric study has been accomplished to figure out the effects of the elliptic cylinder thickness, angle of attack, and Reynolds number on the lift and drag forces exerted on the elliptic cylinder. A two-dimensional incompressible Navier-Stokes flow solver is developed using SIMPLER method to analyze the unsteady viscous flow over elliptic cylinder. Thickness-to-chord ratios of 0.2, 0.4, and 0.6 elliptic cylinders are simulated at different Reynolds numbers of 400 and 600, and angles of attack of 10°, 20°, and 30°. Through this study, it is observed that the elliptic cylinder thickness, angle of attack, and Reynolds number affect significantly not only the time-mean values and the amplitudes of the drag and lift forces but also the frequencies of the force oscillations.
박영빈(Young Bin Park),장춘만(Choon Man Jang),양상호(Sang Ho Yang) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-
Pressure characteristics according to the duct shape of a turbo blower connected in serial have been performed to reduce pressure loss in the piping system of a blower. To analyze three-dimensional flow field in the turbo blower, general analysis code, CFX, is employed in the present work. SST turbulence model is introduced to estimate the eddy viscosity. Throughout the numerical analysis for the duct system of the turbo blower having a various shape of inlet guide, optimal shape of the inlet guide can be selected. It is found that the pressure loss in the duct system having a optimal inlet guide is reduced by minimizing the recirculation region in the blade passage of the impeller. Detailed flow analysis of the blower serially connected is also performed and analyzed.