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

Research output: Contribution to journalArticlepeer-review

91 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. © 2013 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1502-1508
Number of pages7
JournalNano Letters
Issue number4
StatePublished - Mar 6 2013
Externally publishedYes


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