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조재억(Jaeeock Cho),양병기(Byungki Yang),이홍구(Honggu Lee),현덕환(Deochwan Hyun),정우원(Woowon Jung),이대종(Daejong Lee),홍근기(Keunkee Hong),이성은(Seong-Eun Lee),홍정의(Jeongeui Hong) 한국태양광발전학회 2013 Current Photovoltaic Research Vol.1 No.1
In contrast to conventional crystalline cells, back-contact solar cells feature high efficiencies, simpler module assembly, and better aesthetics. The highest commercialized cell and module efficiency was recorded by n-type back-contact solar cells. However, the mainstream PV industry uses a p?type substrate instead of n-type due to the high costs and complexity of the manufacturing processes in the case of the latter. P-type back-contact solar cells such as metal wrap?through and emitter wrap-through, which are inexpensive and compatible with the current PV industry, have consequently been developed. In this paper the characteristics of EWT (emitter wrapthrough) solar cells and their status and prospects for development are discussed.
EWT 태양전지 제작을 위한 레이저 미세 관통홀 가공 기술
이홍구(Lee,Hong-Gu),서세영(Seo,Se-Young),현덕환(Hyun,Deoc-hwan),이용화(Lee,Yong-wha),김강일(Kim,Gang-il),정우원(Jung,Woo-won),이아름(Lee,Ah-Reum),조재억(Cho,Jaee-ock) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.4
Laser drilling or vias is the one of key technologies in developing Emitter-Wrap Through(EWT) solar cell which is particularly attractive due to the use of industrial processing and common solar grade p-type silicon materials. While alternative economically feasible drilling process is not available to date, the processing time and laser induced damage should be as small as possible in this process. This paper provides an overview on various factors that should be considered in using the laser via drilling technology for developing highly efficient and industrially applicable EWT solar cells.
Wrap Through 태양전지의 효율 향상을 위한 Hole 가공과 열처리 기술
홍근기(Hong, Keun-Kee),이대종(Lee, Dae-Jong),정우원(Jung, Woo-Won),이홍구(Lee, Hong-Gu),현덕환(Hyun, Deoc-Hwan),양병기(Yang, Byung-Ki),이성은(Lee, Seong-Eun),조재억(Cho, Jae-Eock),홍정의(Hong, Jeong-Eui) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
In contrast to the conventional crystalline, back-contact solar cells feature high efficiencies, simpler module assembly, and better aesthetics. The highest commercialized cell and module efficiency is recorded by n-type back-contact solar cells. However, the mainstream PV industry uses p-type substrate instead of n-type due to high costs and complexity of manufacturing processes. Therefore p-type back-contact solar cells such as metal wrap-through and emitter wrap-through which are low cost and compatible with current PV industry have been developed. In this paper, we studied for hole formation process and firing process of EWT solar cells, status and prospects for development of EWT solar cell will be discussed.
조재억,황순영,김규영 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.12
A study was made to investigate the corrosion and corrosion-wear performances in strong acid (5 wt% H₂SO_(4)) solution for the high-velocity oxygen-fuel (HVOF) sprayed coatings of tungsten carbide (WC) cermets. Four different alloy compositions were used as WC cermet coating materials in this study, and they were WC-Co, WCNi, WC-Co-Cr and WC-CrC-Ni. The immersion test and electrochemical test showed that galvanic corrosion occurred between WC particle and binder metal in the coating layer and general corrosion occurred on metallic binder for non-Cr added WC-Co and WC-Ni coatings. The best anti-corrosion properties were observed in the metallic Cr containing WC-Co-Cr layer, which was presumably due to the formation of beneficial chromium oxide on the coating surface. It was found that the corrosion resistance of WC cermet coatings was dependent on the compositions of binder metals as well as the micro-crack ratio of coated layer. (Received June 12, 2004)