Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2007.06a
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- Pages.192-193
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- 2007
Investigation of Plated Contact for Crystalline Silicon Solar Cells
결정질 실리콘 태양전지에 적용될 도금전극 특성 연구
- Kim, Bum-Ho (Strategic Energy Research Institute, Dept. of Electronic Engineering, Sejong Univ.) ;
- Choi, Jun-Young (Strategic Energy Research Institute, Dept. of Electronic Engineering, Sejong Univ.) ;
- Lee, Eun-Joo (Strategic Energy Research Institute, Dept. of Electronic Engineering, Sejong Univ.) ;
- Lee, Soo-Hong (Strategic Energy Research Institute, Dept. of Electronic Engineering, Sejong Univ.)
- 김범호 (세종대학교 전자공학과 전략에너지개발사업단) ;
- 최준영 (세종대학교 전자공학과 전략에너지개발사업단) ;
- 이은주 (세종대학교 전자공학과 전략에너지개발사업단) ;
- 이수홍 (세종대학교 전자공학과 전략에너지개발사업단)
- Published : 2007.06.21
Abstract
An evaporated Ti/Pd/Ag contact system is most widely used to make high-efficiency silicon solar cells, however, the system is not cost effective due to expensive materials and vacuum techniques. Commercial solar cells with screen-printed contacts formed by using Ag paste suffer from a low fill factor and a high shading loss because of high contact resistance and low aspect ratio. Low-cost Ni and Cu metal contacts have been formed by using electro less plating and electroplating techniques to replace the Ti/Pd/Ag and screen-printed Ag contacts. Ni/Cu alloy is plated on a silicon substrate by electro-deposition of the alloy from an acetate electrolyte solution, and nickel-silicide formation at the interface between the silicon and the nickel enhances stability and reduces the contact resistance. It was, therefore, found that nickel-silicide was suitable for high-efficiency solar cell applications. Cu was electroplated on the Ni layer by using a light induced plating method. The Cu electroplating solution was made up of a commercially available acid sulfate bath and additives to reduce the stress of the copper layer. In this paper, we investigated low-cost Ni/Cu contact formation by electro less and electroplating for crystalline silicon solar cells.