title: Enhancing solar cells with localized plasmons in nanovoids.
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.
authors.affiliation: Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
authors.forename: N N
authors.initials: NN
authors.lastname: Lal
authors.forename: B F
authors.initials: BF
authors.lastname: Soares
authors.forename: J K
authors.initials: JK
authors.lastname: Sinha
authors.forename: F
authors.initials: F
authors.lastname: Huang
authors.forename: S
authors.initials: S
authors.lastname: Mahajan
authors.forename: P N
authors.initials: PN
authors.lastname: Bartlett
authors.forename: N C
authors.initials: NC
authors.lastname: Greenham
authors.forename: J J
authors.initials: JJ
authors.lastname: Baumberg