Effect of the anisotropy of etching surface morphology on light-trapping and photovoltaic conversion efficiencies of silicon solar cell. (15th May 2020)

• Record Type: Journal Article
• Authors: Li, Jiayan; Cai, Min; Wu, Xiaowei; Li, Pengting; Tan, Yi
• Is Part Of: Solar energy. Volume 202(2020)
• Page Start: 190
• Page End: 197
• Publication Date: 2020-05-15
• Subjects: Multi-crystalline silicon -- Texturization -- Wet chemical etching -- Acid etching; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2020.03.107
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: A homogeneous surface with nanoscale oval pits was obtained. Textured surface shows orientation dependence. Light-trapping efficiency features a difference of 22–27% in different directions. Photovoltaic conversion efficiency also features a difference of 0.6–0.8%. Abstract: 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 R ave 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.