Optical characterization of nanopillar black silicon for plasmonic and solar cell application

M. R. Gartia, Y. Chen, Z. Xu, Y. C. Bordain, J. Eichorst, J. C. Mabon, J. A.N.T. De Soares, R. M. Clegg, G. L. Liu

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

1 Scopus citations


With the goal of improving photo-absorption of photovoltaic device and for plasmonic application we have fabricated nanopillar black silicon devices through etching-passivation technique which does not require any photomask and whole wafer scale uniformity is achieved at room temperature in a short time. We have carried out thorough optical characterization for nanopillar black silicon devices to be used for solar cell and plasmonic applications. Cathodoluminescence (CL), current dependent CL spectroscopy, photoluminescence (at room temperature and 77 K), Raman spectroscopy, reflectance and absorption measurement have been performed on the device. A thin layer of Ag is deposited to render with plasmonic property and the plasmonic effect is probed using surface plasmon enhanced fluorescence, angle dependent reflectance measurements, high resolution cathodoluminescence (CL), surface enhanced Raman spectroscopy (SERS) measurement and Fluorescence Lifetime Imaging Microscopy (FLIM) experiment. We obtained reduction in optical reflection of ∼ 12 times on b-Si substrate from UV to NIR range, the nanostructured fluorescence enhancement of ∼40 times and the Raman scattering enhancement factor of 6.4×107.

Original languageEnglish (US)
Title of host publicationPlasmonics
Subtitle of host publicationMetallic Nanostructures and Their Optical Properties IX
StatePublished - 2011
Externally publishedYes
EventPlasmonics: Metallic Nanostructures and Their Optical Properties IX - San Diego, CA, United States
Duration: Aug 21 2011Aug 25 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferencePlasmonics: Metallic Nanostructures and Their Optical Properties IX
Country/TerritoryUnited States
CitySan Diego, CA


  • Antireflection
  • Black silicon
  • Cathodoluminescence
  • SERS
  • Solar cell
  • Surface plasmon


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