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

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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. (C) 2011 Optical Society of America

Original languageEnglish
Pages (from-to)11256-11263
Number of pages8
JournalOptics Express
Volume19
Issue number12
Publication statusPublished - 06 Jun 2011

Cite this

Lal, N. N., Soares, B. F., Sinha, J. K., Huang, F., Mahajan, S., Bartlett, P. N., Greenham, N. C., & Baumberg, J. J. (2011). Enhancing solar cells with localized plasmons in nanovoids. Optics Express, 19(12), 11256-11263.