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Effect of the anisotropy of etching surface morphology on light-trapping and photovoltaic conversion efficiencies of silicon solar cell
摘要： A homogeneous diamond wire sawing multicrystalline Si surface with nanoscale oval pits was obtained in an acid solution by adding NaNO2, polyethylene glycol–polyvinyl alcohol, and dodecylbenzene sulfonic acid at 12 °C for 130 s. The textured surface showed orientation dependence. The anisotropy of H/D caused different experimental results. The Rave of incident light originating from the direction parallel to saw marks was 22–27% larger than that from the direction perpendicular to saw marks. The photovoltaic conversion efficiency was 0.6–0.8% higher when the thin grid line of Ag electrode was parallel to the saw marks than when in the perpendicular direction. These results indicated that using saw marks can improve the conversion efficiency of solar cells.
关键词： Acid etching,Multi-crystalline silicon,Texturization,Wet chemical etching
更新于2025-09-23 15:21:01
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Chemical Texturization Processes for Non-conventional Silicon Substrates for Silicon Heterojunction Solar Cell Applications
摘要： The present work addresses the exhaustive study of the surfaces of multicrystalline silicon wafers after being subjected to a texturization process for silicon heterojunction solar cell applications. The investigations described include the effect that the time of isotropic etching based on combinations of hydrofluoric and nitric acids has on the reflectance, the morphology of the surfaces and the surface recombination through the evolution of the implicit open-circuit voltage. The influence of previous treatments and the elimination of porous silicon or silicon oxide formed on wafer surfaces as a consequence of these texturization processes are also addressed. Textured multicrystalline silicon wafer surfaces with a good uniformity and low weighted hemispherical reflectances (23–24%) have been achieved with short etching times. These texturization processes have also been tested on upgraded metallurgical silicon wafers, resulting in weighted hemispherical reflectance values around 23%, but at the cost of the appearance of important surface defects.
关键词： Multicrystalline silicon,Reflectance,Chemical texturization,Surface morphology,Silicon heterojunction solar cells,UMG silicon
更新于2025-09-12 10:27:22