Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Investigation of Improving Texturing Effect by Surface Saw Damage Etching Using Acidic Etchant for Silicon Solar Cells

산성 표면절삭결함 제거 공정에 의한 실리콘 태양전지의 텍스쳐링 효과 개선

  • Park, Hayoung (Department of materials science and engineering, Korea University) ;
  • Lee, Joon Sung (Department of materials science and engineering, Korea University) ;
  • Kwon, Soonwoo (R&D center, TS Corporation) ;
  • Yoon, Sewang (R&D center, TS Corporation) ;
  • Lim, Heejin (Department of materials science and engineering, Korea University) ;
  • Kim, Donghwan (Department of materials science and engineering, Korea University)
  • Received : 2008.09.16
  • Published : 2008.12.25
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Abstract

Texturing for crystalline silicon solar cells is one of the important techniques to increase conversion efficiency by effective photon trapping. Generally, incoming wafers or alkali etched wafers are used for texturing. From this conventional etching process, $7{\sim}10{\mu}m$-sized random pyramids are formed. In this study, acid etching for removal of saw damages was practiced before texturing. This improved the resulting surface morphology, which consisted of $2{\sim}4{\mu}m$-sized pyramids. Because these pyramids covered the surface much more extensively, we obtained reduction of optical losses on the surface. In order to compare with conventional texturing, FE-SEM is used for observing surface morphology and reflectance data is analyzed by UV-VIS spectrophotometer.

Keywords

Acknowledgement

Supported by : 지식경제부

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