High temperature annealing of bent multicrystalline silicon rods

Torunn Ervik, Maulid Kivambe, Gaute Stokkan, Birgit Ryningen, Otto Lohne

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Dislocation etch-pit structures on multicrystalline silicon rods deformed at 900 °C in four-point bending were studied prior to and after a high-temperature annealing. After deformation, the majority of the dislocation etch-pits were aligned along traces of {1 1 1} planes. Certain localized areas revealed network structures, where etch-pit arrays deviated in the range of 2-10° from the {1 1 1} plane traces. After annealing at 1350 °C for 12 h, a marked change in dislocation density and structure which varied from grain to grain was observed. Some grains showed incomplete polygonized structures, with notable irregularities and Y-junctions. The results were compared with observations on as-cast industrial multicrystalline silicon wafers for solar cells, where similar incomplete polygonized structures can be found.

Original languageEnglish
Pages (from-to)6762-6769
Number of pages8
JournalActa Materialia
Volume60
Issue number19
DOIs
Publication statusPublished - 1 Nov 2012

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Keywords

  • Dislocation structures
  • Plastic deformation
  • Recovery
  • Silicon
  • Solar cells

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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