Investigation of improving texturing effect by surface saw damage etching using acidic etchant for silicon solar cells

Hayoung Park, Joon Sung Lee, Soonwoo Kwon, Sewang Yoon, Heejin Lim, Donghwan Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

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, 7-10 μm-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 2-4 μm-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.

Original languageEnglish
Pages (from-to)835-840
Number of pages6
JournalJournal of Korean Institute of Metals and Materials
Volume46
Issue number12
Publication statusPublished - 2008 Dec 1

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Keywords

  • Crystalline silicon
  • Optical losses
  • Random pyramids
  • Saw damage etching
  • Solar cells
  • Texturing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Modelling and Simulation

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