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Broadband Absorptance High Efficiency Silicon Nanowire Fractal Arrays for Photovoltaic Applications

Published online by Cambridge University Press:  07 July 2014

Omar H. Alzoubi ,
Husam Abu-Safe ,
Khalid Alshurman  and
Hameed A. Naseem
Omar H. Alzoubi
Affiliation:
Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
Husam Abu-Safe
Affiliation:
Natural Resources Engineering and Management, German-Jordanian University, Madaba, Jordan
Khalid Alshurman
Affiliation:
Microelectronics and photonics program, University of Arkansas, Fayetteville, AR 72701, U.S.A.
Hameed A. Naseem
Affiliation:
Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
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Abstract

Nanowire arrays have been proposed to enhance light trapping, increase efficiencies, and reduced material cost in photovoltaic solar cells. In this work we present a new crystalline silicon nanowire array structure, inspired by fractal geometry. The array structure is assumed to be an infinite 2D array in the x and y directions, and composed of vertically aligned SiNW suspended in air. Hexagonal fractal-like geometry is adapted in arranging cylindrical SiNW in these arrays. Full-wave finite element method 3D simulation is used to compute reflectance, transmittance and absorptance of the array for a normal incidence plane wave. The proposed fractal-like distribution of SiNW arrays yield broad absorption spectrum and enhanced efficiency while using less material. The efficiency of the proposed fractal-like SiNW arrays achieve ∼100% enhancement over that of the equivalent thickness flat c-Si film, and ∼18% enhancement over an equivalent height hexagonal array. The proposed optimized structures achieved a filling ratio ∼25%, which is ∼33% less than the corresponding hexagonal array.

Keywords

photovoltaicopticalnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1707: Symposium UU – Semiconductor Nanowires—Synthesis, Properties and Applications , 2014 , mrss14-1707-uu06-02
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Hua, B., Lin, Q., Zhang, Q. & Fan, Z. Efficient photon management with nanostructures for photovoltaics. Nanoscale 5, 6627–6640 (2013).CrossRefGoogle ScholarPubMed
Zeman, M. et al. . Advanced Light Management Approaches for Thin-Film Silicon Solar Cells. Energy Procedia 15, 189–199 (2012).CrossRefGoogle Scholar
Beaucarne, G. Silicon Thin-Film Solar Cells. Advances in OptoElectronics, vol. 2007, 36970, ( 2007).Google Scholar
Wang, W., Wu, S., Reinhardt, K., Lu, Y. & Chen, S. Broadband Light Absorption Enhancement in Thin-Film Silicon Solar Cells. Nano Lett. 10, 2012–2018 (2010).CrossRefGoogle ScholarPubMed
Spinelli, P. et al. . Plasmonic light trapping in thin-film Si solar cells. J. Opt. 14, 024002 (2012).CrossRefGoogle Scholar
Wang, C., Yu, S., Chen, W. & Sun, C. Highly Efficient Light-Trapping Structure Design Inspired By Natural Evolution. Sci. Rep. 3, (2013).Google ScholarPubMed
Du, Q. G., Kam, C. H., Demir, H. V., Yu, H. Y. & Sun, X. W. Broadband absorption enhancement in randomly positioned silicon nanowire arrays for solar cell applications. Opt. Lett. 36, 1884–1886 (2011).CrossRefGoogle ScholarPubMed
Bao, H. & Ruan, X. Optical absorption enhancement in disordered vertical silicon nanowire arrays for photovoltaic applications. Opt. Lett. 35, 3378–3380 (2010).CrossRefGoogle ScholarPubMed
Tsakalakos, L. et al. . Silicon nanowire solar cells. Appl. Phys. Lett. 91, 233117 (2007).CrossRefGoogle Scholar
Palik, E. D.., Handbook of Optical Constants of Solids. New York: Academic, 1985.Google Scholar
Hu, L. & Chen, G. Analysis of Optical Absorption in Silicon Nanowire Arrays for Photovoltaic Applications. Nano Lett. 7, 3249–3252 (2007).CrossRefGoogle ScholarPubMed