Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Optimizing Surface Reflectance Properties of Low Cost Multicrystalline EFG Ribbon-silicon

저가 다결정 EFG 리본 웨이퍼의 표면 반사도 특성 최적화

  • Kim, Byeong-Guk (Department of Electronic Engineering, Chungju National University) ;
  • Lee, Yong-Koo (Department of Electronic Engineering, Chungju National University) ;
  • Chu, Hao (Department of Electronic Engineering, Chungju National University) ;
  • Oh, Byoung-Jin (Department of Electronic Engineering, Chungju National University) ;
  • Park, Jae-Hwan (Department of Electronic Engineering, Chungju National University) ;
  • Lee, Jin-Seok (Energy Conversion and Storage Research Center, Korea Institute of Energy Research) ;
  • Jang, Bo-Yun (Energy Conversion and Storage Research Center, Korea Institute of Energy Research) ;
  • An, Young-Soo (Energy Conversion and Storage Research Center, Korea Institute of Energy Research) ;
  • Lim, Dong-Gun (Department of Electronic Engineering, Chungju National University)
  • Received : 2010.10.12
  • Accepted : 2011.01.24
  • Published : 2011.02.01
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Abstract

Ribbon silicon solar cells have been investigated because they can be produced with a lower material cost. However, it is very difficult to get good texturing with a conventional acid solution. To achieve high efficiency should be minimized for the reflectance properties. In this paper, acid vapor texturing and anti-reflection coating of $SiN_x$ was applied for EFG Ribbon Si Wafer. P-type ribbon silicon wafer had a thickness of 200 ${\mu}m$ and a resistivity of 3 $\Omega-cm$. Ribbon silicon wafers were exposed in an acid vapor. Acid vapor texturing was made by reaction between the silicon and the mixed solution of HF : $HNO_3$. After acid vapor texturing process, nanostructure of less than size of 1 ${\mu}m$ was formed and surface reflectance of 6.44% was achieved. Reflectance was decreased to 2.37% with anti-reflection coating of $SiN_x$.

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References

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