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Enhancing solar cells with localized plasmons in nanovoids

  • N. N. Lal
  • , B. F. Soares
  • , J. K. Sinha
  • , F. Huang
  • , S. Mahajan
  • , P. N. Bartlett
  • , N. C. Greenham
  • , J. J. Baumberg

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)

Abstract

Localized plasmon resonances of spherical nanovoid arrays strongly enhance solar cell performance by a factor of 3.5 in external quantum efficiency at plasmonic resonances, and a four-fold enhancement in overall power conversion efficiency. Large area substrates of silver nanovoids are electrochemically templated through self-assembled colloidal spheres and organic solar cells fabricated on top. Our design represents a new class of plasmonic photovoltaic enhancement: that of localized plasmon-enhanced absorption within nanovoid structures. Angularly-resolved spectra demonstrate strong localized Mie plasmon modes within the nanovoids. Theoretical modelling shows varied spatial dependence of light intensity within the void region suggesting a first possible route towards Third Generation plasmonic photovoltaics.

Original languageEnglish
Pages (from-to)11256-11263
Number of pages8
JournalOptics Express
Volume19
Issue number12
DOIs
Publication statusPublished - 6 Jun 2011
Externally publishedYes

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