Ultralight-trapping filters with volume reflection holograms

Deming Zhang, Juan M. Russo, Michael Gordon, Shelby Vorndran, Raymond K. Kostuk

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Light trapping is a useful approach for increasing the absorption of thin film photovoltaic (PV) cells. Simple light trapping can be achieved by incorporating a scattering layer on the top and bottom surface of cells and can increase absorption by a factor of 4$n2. Recently, ultralight trapping using Rugate and 1-D photonic bandgap filters have been proposed to increase light trapping by a factor of 4n2/sin2 θ, where θ is half of the acceptance angle. In this paper, we present the design of a holographic ultralight trapping filter. The holographic filter can be implemented in large areas at a low cost, which makes it scalable for PV applications. A design is presented that increases the optical path length for near bandgap wavelengths in a thin-film silicon PV cell. The optical path length enhancement is converted to electrical output using the PC-1D simulation software. The short-circuit current for a 10-μm-thick silicon PV cell increases by nearly 14.7% relative to a cell without light trapping.

Original languageEnglish (US)
Article number6322999
Pages (from-to)284-288
Number of pages5
JournalIEEE Journal of Photovoltaics
Issue number1
StatePublished - 2013


  • Holographic optical element
  • light trapping
  • photovoltaic (PV)
  • thin-film silicon solar cells

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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