Effective medium analysis on the optical properties of silicon nanowire arrays

Han Wang, Xianglei Liu, Liping Wang, Zhuomin Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In search of next-generation solar cells, silicon nanowire arrays have attracted great attention since they are costeffective and may absorb more light compared to thin-film silicon solar cells. Theoretical studies using finite-different time-domain and transfer matrix methods have been performed to investigate the optical properties of silicon nanowire (SiNW) arrays, however, they are computationally intensive and require periodic condition, which may not be satisfied with most fabricated samples. In the present study, an effective medium analysis is performed to study the optical properties of vertically-aligned SiNWs on Si substrate in the wavelength range from 310 nm to 1100 nm, which is of the most important interest for solar cells. The effective dielectric function of the SiNW layer is obtained from the Bruggeman approximation. Thin-film optics formulae are employed to calculate the reflectance, transmittance and absorptance of the SiNWs on silicon substrate at normal incidence. The effect of geometric parameters such as filling ratio and wire length will be investigated to understand the light absorption and to facilitate the optimal design of highperformance SiNW solar cells.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8495
DOIs
StatePublished - 2012
EventReflection, Scattering, and Diffraction from Surfaces III - San Diego, CA, United States
Duration: Aug 13 2012Aug 16 2012

Other

OtherReflection, Scattering, and Diffraction from Surfaces III
CountryUnited States
CitySan Diego, CA
Period8/13/128/16/12

Fingerprint

Silicon Nanowires
Silicon
Solar Cells
Optical Properties
Nanowires
nanowires
Optical properties
solar cells
optical properties
Silicon solar cells
silicon
Thin Films
Solar cells
Substrate
absorptance
Transfer matrix method
Transfer Matrix Method
Transmittance
Substrates
thin films

Keywords

  • Absorption
  • Effective medium
  • Silicon nanowires
  • Thin film optics

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Wang, H., Liu, X., Wang, L., & Zhang, Z. (2012). Effective medium analysis on the optical properties of silicon nanowire arrays. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8495). [84950C] https://doi.org/10.1117/12.930881

Effective medium analysis on the optical properties of silicon nanowire arrays. / Wang, Han; Liu, Xianglei; Wang, Liping; Zhang, Zhuomin.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8495 2012. 84950C.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, H, Liu, X, Wang, L & Zhang, Z 2012, Effective medium analysis on the optical properties of silicon nanowire arrays. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8495, 84950C, Reflection, Scattering, and Diffraction from Surfaces III, San Diego, CA, United States, 8/13/12. https://doi.org/10.1117/12.930881
Wang H, Liu X, Wang L, Zhang Z. Effective medium analysis on the optical properties of silicon nanowire arrays. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8495. 2012. 84950C https://doi.org/10.1117/12.930881
Wang, Han ; Liu, Xianglei ; Wang, Liping ; Zhang, Zhuomin. / Effective medium analysis on the optical properties of silicon nanowire arrays. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8495 2012.
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