Effects of pretexturization chemical processing on the optical and morphological properties of solar-grade monocrystalline silicon wafers

Surface texturization is a route to improving the efficiency of silicon solar cells by enhancing their light trapping ability. In this paper, solar-grade, monocrystalline, unpolished, silicon wafers were chemically processed via different routes before texturization. The effect of this pre-texturization processing on the morphological evolution with corresponding changes in optical properties has been systematically studied with a scanning electron microscope, atomic force microscope, and UV-Vis spectrophotometer. It has been found that the uniformity and size distribution of pyramid structures, as well as the reflectance of the textured surfaces, depend on the pre-textured chemical processing. Moreover, it has also been found that etching the oxide layer with HF prior to texturization does not affect the optical properties of textured silicon substrates.

Abstract licence: CC BY

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