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Title: Photovoltaic cell with light trapping for enhanced efficiency

The efficiency of a photovoltaic cell is enhanced by light trapping using Mie-scattering nanostructures. In one embodiment, an array of nanocylinders is formed on the front surface of a silicon film to enhance forward scattering into the film, and an array of nanocylinders is formed on the back surface to enhance backscattering so that more light is absorbed within the silicon film. In an alternate embodiment, a mirror layer is formed on the back surface of the silicon film to reflect light within the film back toward the front-surface nanocylinder array.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1226233
Assignee:
Sandia Corporation SNL-A
Patent Number(s):
9,190,542
Application Number:
14/555,438
Contract Number:
AC04-94AL85000
Resource Relation:
Patent File Date: 2014 Nov 26
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY

Works referenced in this record:

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  • DOI: 10.1364/JOSA.72.000899

Fundamental limit of nanophotonic light trapping in solar cells
journal, September 2010
  • Yu, Zongfu; Raman, Aaswath; Fan, Shanhui
  • Proceedings of the National Academy of Sciences, Vol. 107, Issue 41, p. 17491-17496
  • DOI: 10.1073/pnas.1008296107