Journal article

Hot Carrier Extraction with Plasmonic Broadband Absorbers

Charlene Ng, Jasper J Cadusch, Svetlana Dligatch, Ann Roberts, Timothy J Davis, Paul Mulvaney, Daniel E Gomez

ACS Nano | American Chemical Society | Published : 2016

Abstract

Hot charge carrier extraction from metallic nanostructures is a very promising approach for applications in photocatalysis, photovoltaics, and photodetection. One limitation is that many metallic nanostructures support a single plasmon resonance thus restricting the light-to-charge-carrier activity to a spectral band. Here we demonstrate that a monolayer of plasmonic nanoparticles can be assembled on a multistack layered configuration to achieve broadband, near-unit light absorption, which is spatially localized on the nanoparticle layer. We show that this enhanced light absorbance leads to ∼40-fold increases in the photon-to-electron conversion efficiency by the plasmonic nanostructures. We..

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Grants

Awarded by ARC


Funding Acknowledgements

This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). C.N. was supported by an OCE Fellowship from CSIRO. D.E.G. acknowledges the ARC for support through a Future Fellowship (FT140100514). D.E.G. and T.J.D. acknowledge the ANFF for the MCN Technology Fellowships.