Silicon wafers for solar cells by horizontal ribbon growth

German A. Oliveros, Ruochen Liu, Seetharaman Sridhar, B. Erik Ydstie

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In this paper, we present a set of models that describe the principal components of the Horizontal Ribbon Growth process - mainly, the interaction between fluid flow and heat transfer, the crystallization dynamics, and the effect of impurities on the morphology of the interface. Fluid-flow and heat-transfer models show the relationship between the pulling rate and the thickness of the silicon film. A crystallization model is developed to find the concentration distribution of impurities - aluminum in this case - in the melt and in the ribbon. We find that, because of low growth velocities, there is no formation of a solute-enriched boundary layer and that a 50-fold reduction of aluminum impurities can be expected. Finally, we use the Mullins-Sekerka stability theory to show that aluminum impurities at the proposed levels do not destabilize the interface upon applied perturbations.

Original languageEnglish (US)
Pages (from-to)3239-3246
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume52
Issue number9
DOIs
StatePublished - Mar 6 2013
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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