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CIGS 박막 태양전지 CBD-CdS buffer 층에 관한 연구
신준철,조성희,이상협,송찬문,임동건,양계준 한국교통대학교 2015 한국교통대학교 논문집 Vol.50 No.-
Cadmium sulfide (CdS), belonging to a II–VI compound semiconductor, is widely used for solar cells, optical detectors, and optoelectronic devices. It is a suitable window material for many heterojunction solar cells. chemical bath deposition (CBD) process conditions for depositing CdS buffer layers was studied for high efficiencies of CIGS thin film solar cell. They were analyzed in terms of structural, optical and electrical properties of CdS films according to the [S2-]/[Cd2+] ratio. In the case of Cd concentration higher than S concectration, CdS thin films were formed mainly by cluster-by-cluster formation due to the homogeneous reaction between Cd and S in the solution. Therefore the grain size increased and the transmittance decreased. As the reaction temperatures were increased, the deposition rate of CdS films prepared by CBD was increased and the grain size was large due to increasing reaction rate in solution, also optical transmittance of the films in visible lights was increased on rising reaction temperatures.
결정질 실리콘 태양전지용 스크린 프린팅 전극 공정 개발
엄태우(Taewoo Eom),이상협(Sang Hyeop Lee),송찬문(Chan Moon Song),박상용(Sang Yong Park),임동건(Donggun Lim) 한국태양광발전학회 2017 Current Photovoltaic Research Vol.5 No.1
The screen printing technique is one of process to form electrode for crystalline silicon solar cell and has been studied a lot, because it has many advantages such as low price, high efficiency and mass production due to simple and fast process. The reason why electrode formation is important is for influence of series resistance and amount of incident light in crystalline silicon solar cell. In this study, electrode was formed by screen printing method with various conditions like squeegee angle, printing speed, snap off, printing pressure. After optimizing various conditions, double printing method was applied to obtain low series resistance and high aspect ratio. As a result, we obtained electrode resistance 45.31 ohm, aspect ratio 4.38, shading loss 7.549% mono-crystalline silicon solar cell with optimal double screen printing condition.