Beck, FionaMokkapati, S.Polman, A.Catchpole, Kylie2015-12-022015-12-020003-6951http://hdl.handle.net/1885/16981We show experimentally that there is asymmetry in photocurrent enhancement by Agnanoparticle arrays located on the front or on the rear of solar cells. The scattering cross-section calculated for front- and rear-located nanoparticles can differ by up to a factor of 3.7, but the coupling efficiency remains the same. We attribute this to differences in the electric field strength and show that the normalized scattering cross-section of a front-located nanoparticle varies from two to eight depending on the intensity of the driving field. In addition, the scattering cross-section of rear-located particles can be increased fourfold using ultrathin spacer layers.This work is financially supported by the Australian Research Council and the Foundation for Fundamental Research on Matter FOM which is supported by NWO, as part of the Joint Solar Program.© 2010 American Institute of Physics.Ag nanoparticleCoupling efficiencyDriving fieldElectric field strengthPhotocurrent enhancementPlasmonic nanoparticle arraysScattering cross sectionSpacer layerUltra-thinElectric fieldsNanoparticlesScatteringSolar cellsSilver2010-01-2010.1063/1.32920202016-02-24