Jointly tuned plasmonic-excitonic photovoltaics using nanoshells

Daniel Paz-Soldan, Anna Lee, Susanna M. Thon, Michael M. Adachi, Haopeng Dong, Pouya Maraghechi, Mingjian Yuan, André J. Labelle, Sjoerd Hoogland, Kun Liu, Eugenia Kumacheva, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


Recent advances in spectrally tuned, solution-processed plasmonic nanoparticles have provided unprecedented control over light's propagation and absorption via engineering at the nanoscale. Simultaneous parallel progress in colloidal quantum dot photovoltaics offers the potential for low-cost, large-area solar power; however, these devices suffer from poor quantum efficiency in the more weakly absorbed infrared portion of the sun's spectrum. Here, we report a plasmonic-excitonic solar cell that combines two classes of solution-processed infrared materials that we tune jointly. We show through experiment and theory that a plasmonic-excitonic design using gold nanoshells with optimized single particle scattering-to-absorption cross-section ratios leads to a strong enhancement in near-field absorption and a resultant 35% enhancement in photocurrent in the performance-limiting near-infrared spectral region.

Original languageEnglish (US)
Pages (from-to)1502-1508
Number of pages7
JournalNano letters
Issue number4
StatePublished - Apr 10 2013


  • Colloidal quantum dots
  • localized surface plasmons
  • nanoshells
  • near-field
  • photovoltaics

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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