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Journal of Nanomaterials
Volume 2013 (2013), Article ID 716012, 5 pages
http://dx.doi.org/10.1155/2013/716012
Research Article

Formation of Various Pyramidal Structures on Monocrystalline Silicon Surface and Their Influence on the Solar Cells

1State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, China
2Zhejiang Institute of Quality Inspection Science, Hangzhou 310013, China

Received 22 June 2013; Accepted 13 July 2013

Academic Editor: Jiamin Wu

Copyright © 2013 Yangang Han et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Texturization is a useful method to enhance the optical absorption of monocrystalline silicon wafers by light-trapping effect in solar cell processing. In present study, a series of textured wafers with various pyramid sizes ranging from 200 nm to 10 μm were fabricated by modified wet-chemical method and characterized. The results show that there is little difference in the reflectance with the pyramid sizes from 1 to 10 μm, which is consistent with the ray-tracing simulation results. However, the light-trapping function of the 200 nm sample below the geometrical optics limit is much weaker. The solar cells fabricated from the 1 μm samples own the highest power conversion efficiency of 18.17% due to a better coverage of metal finger lines than the larger ones, and the 200 nm samples have the lowest efficiency of 10.53%.