한국태양에너지학회:학술대회논문집

The Korean Solar Energy Society (한국태양에너지학회)
권호 표지

Surface Analysis and Conversion Efficiency of Multi-crystalline Silicon Solar Cell by Wet Chemical Etching

습식 화학 식각에 의한 다결정 실리콘 웨이퍼의 표면 분석 및 효율 변화

  • Park, Seok-Gi (Dept. of Electrical Engineering, Graduate School, Konkuk University) ;
  • Do, Kyeom-Seon (Dept. of New Materials Engineering, Graduate School, Yonsei University) ;
  • Song, Hee-Eun (Photovoltaic Research Group, Korea Institute of Energy Research) ;
  • Kang, Gi-Hwan (Photovoltaic Research Group, Korea Institute of Energy Research) ;
  • Ahn, Hyung-Keun (Dept. of Electrical Engineering, Graduate School, Konkuk University) ;
  • Han, Deuk-Young (Dept. of Electrical Engineering, Graduate School, Konkuk University)
  • 박석기 (건국대학교 대학원 전기공학과) ;
  • 도겸선 (연세대학교 대학원 신소재공학과) ;
  • 송희은 (한국에너지기술연구원) ;
  • 강기환 (한국에너지기술연구원) ;
  • 안형근 (건국대학교 대학원 전기공학과) ;
  • 한득영 (건국대학교 대학원 전기공학과)
  • Published : 2011.04.07
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Abstract

Surface Texturing is an essential process for high efficiency in multi-crystalline silicon solar cell. In order to reduce the reflectivity, there are two major methods; proper surface texturing and anti-reflection coating. For texturization, wet chemical etching is a typical method for multi-crystalline silicon. The chemical solution for wet etching consists of HF, $NHO_3$, DI and $CH_3COOH$. We carried out texturization by the change of etching time like 15sec, 30sec, 45sec, 60sec and measured the reflectivity of textured wafers. As making the silicon solar cells, we obtained the conversion efficiency and relationship between texturing condition and solar cell characteristics. The reflectivity from 300nm to 1200nm was the lowest with 15 sec texturing time and 60 sec texturing time showed almost same reflectivity as bare one. The 45 sec texturing time showed the highest conversion efficiency.

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