다결정 실리콘 태양전지의 상부 전극용 금속 박막 적용

The Application of Metallic Thin Film for Tep Electrode of Poly-Si Solar Cell

  • 김상수 (성균관대학교 공대 전기공학과) ;
  • 임동건 (성균관대학교 공대 전기전자 및 컴퓨터공학부) ;
  • 심경석 (성균관대학교 공대 에너지 시스템 공학과) ;
  • 이준신 (성균관대학교 공대 전기전자 및 컴퓨터공학부) ;
  • 김흥우 (한국에너지기술연구소 태양광 발전팀)
  • 발행 : 1997.11.01

초록

We investigated grain boundary effect for terrestrial applications of solar cell\ulcorner with low cost, large area, and high efficiency. Grain boundaries are known as potential barriers and recombination centers for the photo-generated charge carriers, which make it difficult to achieve a high efficiency cell. To reduce these effects of grain boundaries, we investigated various influencing factors such as thermal treatments, various grid patterns, selective wet etchings for grain boundaries, buried contact metallizations along grain boundaries, and use of metallic thin films. From the various grid patterns we learned that the series resistance of solar cell reduced open circuit voltage and consequently decreased the cell efficiency. This paper describes the effect of various grid patterns and the employment of metallic thin films for a top electrode.

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