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Proceedings Paper

Investigation of photoelectrochemical etching of textured silicon in solar cells
Author(s): Jinchuan You; Jing Shi; Bobo Peng; Lianwei Wang; Paul K. Chu
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Paper 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.

Paper Details

Date Published: 13 October 2009
PDF: 7 pages
Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 75180M (13 October 2009); doi: 10.1117/12.840483
Show Author Affiliations
Jinchuan You, East China Normal Univ. (China)
Jing Shi, East China Normal Univ. (China)
Bobo Peng, East China Normal Univ. (China)
Lianwei Wang, East China Normal Univ. (China)
Paul K. Chu, City Univ. of Hong Kong (China)


Published in SPIE Proceedings Vol. 7518:
Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies
Michael Grätzel; Hiroshi Amano; Chin Hsin Chen; Changqing Chen; Peng Wang, Editor(s)

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