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RF-Sputtering법에 의한 CoSi₂/Si 박막 형성에 관한 특성
조금배(Geum-Bae Cho),이강연(Kang-Yoen Lee),최연옥(Youn-Ok Choi),김남오(Nam-Oh Kim),정병호(Byeong-Ho Jeong) 대한전기학회 2010 전기학회논문지 Vol.59 No.7
In this paper, the CoSi₂ thin films with thicknesses of about 5 ㎛ were deposited on n-type silicon (111) substrates by RF magnetron sputtering method using a CoSi₂ target (99.99%). The flow rate of argon of 50 sccm, substrate temperature of 100 ℃, RF power of 60 watts, deposition time of 30 minutes, and the vacuum of 1×10?? Torr. The annealing treatments of the CoSi₂ thin film were performed from 500, 700 and 900 ℃ for 1h in air ambient by an electric furnace. In order to investigate the CoSi₂ thin film X-ray diffraction patterns were measured using the X-ray diffractometer (XRD). The structure of the thin films were investigated by using scanning the electron microscope (SEM) were used for review. The surface morphology of the thin films was measured with a atomic force microscopy (AFM). Temperature dependence of sheet resistivity and property of Hall effect was measured in the CoSi₂ thin film.
정병호(Byeong-Ho Jeong),이강연(Kang-Yoen Lee),박주훈(Ju-Hoon Park),문은아(Eun-Ah Moon),이상현(Sang-Hyun Lee),김대곤(Dae-Gon Kim) 대한전기학회 2012 전기학회논문지 P Vol.61 No.2
CPV system in the desert areas or areas near the equator, as is suitable for high-temperature region. As compared to silicon solar cells, CPV system have a high proportion of a BOS (balance of system). Solar cells because of its low proportion when designing a module technology is applied in a variety of ways. Applied to the CPV system is classified into two kinds of optical technology. One of those using fresnel lens uses refraction of light energy. The other is a mirror reflection of the structure using sprays. Both of these two ways to condense the sun to collect solar cell is a form of light. And goals by using a small solar cell materials is to produce more energy. In this paper, suitable for a domestic environment, with the aim CPV Manufacturing Technology, built on a variety of modular process technology to the development of a prototype performance analysis was carried out. In particular, silicone coated on the glass by the method oi implementation of the Fresnel lens SOG(Silicon on glass) by applying the lens to absorb the solar spectrum was broad. In addition to, for the analyze to characteristics of the CPV module, developed CPV module performance and generating characteristics studied. These related technology through research and development of high-performance multi-junction solar cells, modules, development of concentrating solar power systems to facilitate the growth of the market is considered to be.
구형렌즈를 적용한 CPV 모듈 발전성능 분석에 관한 연구
정병호(Byeong-Ho Jeong),김남오(Nam-Oh Kim),이강연(Kang-Yoen Lee) 대한전기학회 2010 전기학회논문지 P Vol.59 No.3
Next generation concentrating photovoltaic technologies could have a large-scale impact on world electricity production once they will become economically attractive and grid parity will be reached. Multi-junction solar cells will be characterised by a high value of the cell economical performance index if the cells were able to operate at high concentration level. Concentrating the sunlight by optical devices like lenses or mirrors reduces the area of expensive solar cells or modules, and, moreover, increases their efficiency. Accurate and reliable tracking is an important issue to maintain high the CPV system output power. Further, for high concentration CPV systems, the actual tracker cost is about 20% of the total CPV system cost. In this paper high-concentration is defined as systems using concentration ratios well above 100 times the one sun intensity and trackerlss CPV system studied. Using sphericalness lens and parallel MJ cell connection method were suggested and achieved experiment on a clear day in summer. Development of these high performance multi-junction CPV module promises to accelerate growth in photovoltaic power generation.
백색 LED와 RGB 멀티칩 LED 조명장치의 특성 분석
정병호(Byeong-Ho Jeong),김남오(Nam-Oh Kim),김덕구(Deog-Goo Kim),오금곤(Geum-Gon Oh),조금배(Geum-Bae Cho),이강연(Kang-Yoen Lee) 한국조명·전기설비학회 2009 조명·전기설비학회논문지 Vol.23 No.12
LED조명장치는 자동차분야, 항공, 디스플레이, 전송장치 그리고 특수조명등의 응용장치로의 활용이 증가하고 있다. 일반적으로 고출력 RGB 멀티칩 LED는 표시용이나 경관조명용 또는 감성조명용으로 적용되고 백색 LED는 표시용 조명에서 최근 들어 일반조명용으로 적용되고 있으며, 고출력 백색 LED의 출시와 광효율의 증가는 이를 더욱 가속화하고 있다. 본 논문에서는 백색 LED와 RGB 멀티칩 LED 조명장치를 동일한 사양으로 제작하여 물리적, 전기적, 광학적 조명특성을 분석하여 향후 LED조명시스템의 제작에 정량적 데이터를 제공하고자 한다. 이를 위해 LED의 주요한 물리적 특성인 방열특성에 대한 성능분석, 전기적 특성의 분석을 위한 전력 및 드라이브 효율에 대한 성능분석을 수행하였고 조명특성을 위한 연색성, 배광특성, 광효율을 측정하였다. 백색 LED와 RGB 멀티칩 LED 조명장치를 활용한 응용장치의 적용방법을 확립하고 나아가 다양한 조명시스템에 LED 조명장치를 적용하는데 참고가 되는 기초 데이터를 제시하고자 한다. LEDs are increasingly used for many applications including automotive, aviation, display, transportation and special lighting applications. Generally, the RGB multichip LED luminaire applied to signboard, emotional lighting system and display device and the white LED luminaire applied to general lighting system. white LED spectra for general lighting should be designed for high luminous efficacy as well as good color rendering. This paper describes characteristics of LED luminaire white LED and RGB multichip LED. Two type of LED luminaire prototype used experiment physical, electrical and optic test and performance analyzed. RGB multi-chip and phosphor-type white LED luminaire were analyzed by experiment on their color characteristics and luminous efficacy of radiation, distribution curve, and electrical characteristics. Research work is in progress to develop an improved performance for optic and electrical works well for two type of LED luminaires.