Investigation of photoelectrochemical etching of textured silicon in solar cells

Jinchuan You; Jing Shi; Bobo Peng; Lianwei Wang; Paul K. Chu

doi:10.1117/12.840483

12 October 2009 Investigation of photoelectrochemical etching of textured silicon in solar cells

Jinchuan You, Jing Shi, Bobo Peng, Lianwei Wang, Paul K. Chu

Proceedings Volume 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies; 75180M (2009) https://doi.org/10.1117/12.840483
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

Abstract

Light trapping is an important method to increase the efficiency of solar cells. In this work, we study the combined effects of photoelectrochemical etching and texturing to enhance light trapping. Porous silicon (PSi) as an antireflection coating is fabricated on the surface of a textured silicon layer by photoelectrochemical etching. The effects of different electrochemical conditions such as acidic solutions, illumination, current densities, and etching time on the solar cell parameters and surface reflectance from the silicon are evaluated. Our results indicate that the average reflectance of the surface is lower when electrochemical etching is combined with texturing and the PSi thus formed can serve as an antireflection layer in single-crystal silicon solar cells. Our SEM results acquired from samples prepared under different conditions show that the morphology of the textured surface can be improved by electrochemical etching.

Citation Download Citation

Jinchuan You, Jing Shi, Bobo Peng, Lianwei Wang, and Paul K. Chu "Investigation of photoelectrochemical etching of textured silicon in solar cells", Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 75180M (12 October 2009); https://doi.org/10.1117/12.840483

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KEYWORDS

Silicon

Etching

Solar cells

Reflectivity

Electrochemical etching

Semiconducting wafers

Antireflective coatings

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