Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Optimization of Passivation Process in Upgraded Metallurgical Grade (UMG)-Silicon Solar Cells

UMG 실리콘 태양전지의 패시베이션 공정 연구

  • Chang, Hyo-Sik (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Kim, Yoo-Jin (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Hwang, Kwang-Taek (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Choi, Kyoon (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Ahn, Jon (Millinet Solar Co.)
  • Published : 2009.06.18
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Abstract

We have investigated the effect of forming gas annealing for Upgraded Metallurgical Grade (UMG)-silicon solar cell in order to obtain low-cost high-efficiency cell using post deposition anneal at a relatively low temperature. We have observed that high concentration hydrogenation effectively passivated the defects and improved the minority carrier lifetime, series resistance and conversion efficiency. It can be attributed to significantly improved hydrogen-passivation in high concentration hydrogen process. This improvement can be explained by the enhanced passivation of silicon solar cell with antireflection layer due to hydrogen re-incorporation. The results of this experiment represent a promising guideline for improving the high-efficiency solar cells by introducing an easy and low cost process of post hydrogenation in optimized condition.

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