Atomic force microscopy analysis of alkali textured silicon substrates for solar cell applications

  • Abstract
  • Keywords
  • References
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  • Abstract

    In this paper, the surface morphology of textured silicon substrates is explored. Prior to the surface morphology analysis, textured silicon substrates were obtained by KOH anisotropic texturing of polished silicon wafers. This was achieved by investigating of the dependence surface texturing on the process parameters; etchant concentration, etching time and temperature. The surface morphology of the textured silicon samples was obtained using atomic force microscopy that was operated in the tapping mode. The resulting atomic force microscopy (AFM) images were analyzed using the Nanoscope and Gwyddion software packages. The AFM analysis revealed more surface details such as the depth, roughness, section, and step height analysis. The analysis was limited to a length scale of a few micrometers, which carefully reveals the number of individualities of the initial stages of pyramid growth. The average roughness was found to be 593nm for an optimally textured silicon wafer. The implications of the study are then discussed for potential light trapping application in silicon solar cells.

  • Keywords

    AFM; Surface Texturing; Surface Roughness; Pyramid Formation and C-Si Solar Cell.

  • References

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Article ID: 8795
DOI: 10.14419/ijpr.v6i1.8795

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