Nanotextured crystalline silicon solar cells

✍ Scribed by Dimitrov, Dimitre Z. ;Lin, Ching-Hsi ;Du, Chen-Hsun ;Lan, Chung-Wen

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 781 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127150

✦ Synopsis

Abstract

Nano‐scale textures are formed on crystalline silicon surfaces by using a two‐step electroless wet‐chemical method consisting of a treatment in an activated Na~2~S~2~O~8~ (K~2~S~2~O~8~) solution for localized oxidation/surface reaction and silver nanoparticles deposition. The oxidation/reaction products are etched in an aqueous solution of HF and H~2~O~2~ assisted by the presence of silver nanoparticles. The reflectance of the nanotextured silicon wafer surfaces less than 5% in the spectral interval 300–900 nm is observed. It was found that the surface texture can withstand without significantly changing the high‐temperature solar cell processing. A weighted reflectance of 9.5% and 16.43% efficiency are obtained on nanotextured mc‐Si solar cells with an active area of 146 mm^2^ prepared using the standard screen‐printing technique.