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Proceedings Paper

Using self-assembled nanoparticles to fabricate and optimize sub-wavelength textured structures in solar cells
Author(s): D. H. Wan; H. L. Chen; C. C. Yu; Y. C. Lee
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Paper Abstract

In this study, we demonstrated the textured structure on silicon surface by metal assisted etching method, using Au nanoparticles as catalysts in HF and H2O2 solution. The size and density of the nanoparticles could be tuned easily. The porous layers filled with cylinder- or cone-shaped were uniformly formed by immersing the gold deposited silicon wafers in a mixed solution containing HF and H2O2 under different etching conditions. The optimized textured structure was close-packed pyramids-like surface in subwavelength scale and showed the lowest reflectance less than 0.5% over whole visible and near IR wavelengths. The large reduction of reflectance was attributed from the gradient refractive index of the silicon surface with the depth along the light propagation.

Paper Details

Date Published: 5 May 2008
PDF: 9 pages
Proc. SPIE 7002, Photonics for Solar Energy Systems II, 70020X (5 May 2008); doi: 10.1117/12.781279
Show Author Affiliations
D. H. Wan, National Taiwan Univ. (Taiwan)
H. L. Chen, National Taiwan Univ. (Taiwan)
C. C. Yu, National Taiwan Univ. (Taiwan)
Y. C. Lee, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7002:
Photonics for Solar Energy Systems II
Andreas Gombert, Editor(s)

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