Journal
OPTICS EXPRESS
Volume 19, Issue 12, Pages 11256-11263Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.011256
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Funding
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/C511786/1, EP/F059396/1, EP/E040241]
- Gates Cambridge Scholarship
- Engineering and Physical Sciences Research Council [EP/C511786/1, EP/G060649/1, EP/F05534X/1, EP/F059396/1] Funding Source: researchfish
- EPSRC [EP/G060649/1, EP/F059396/1, EP/F05534X/1] Funding Source: UKRI
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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
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