Plasmonic Hot Electron Solar Cells: The Effect of Nanoparticle Size on Quantum Efficiency.
Gold nanoparticles located at a metal oxide/hole conductor interface generate photocurrents upon visible light illumination. We demonstrate that the quantum efficiency of this process depends on the nanoparticle size. Gold nanoparticles (5 nm) show a maximum absorbed photon-to-electron conversion efficiency (APCE) of 13.3%. For increasing particle sizes, the average APCE decreases to 3.3% for the largest particles (40 nm) investigated. Three possible causes for this efficiency change are discussed.
Department of Materials Engineering, Monash University , Clayton, Victoria 3800, Australia.
Philipp
P
Reineck
Department of Materials Engineering, Monash University , Clayton, Victoria 3800, Australia.
Delia
D
Brick
School of Chemistry & Bio21 Institute, University of Melbourne , Parkville, Victoria 3010, Australia.
Paul
P
Mulvaney
Department of Materials Engineering, Monash University , Clayton, Victoria 3800, Australia.|Commonwealth Scientific and Industrial Research Organization, Manufacturing Flagship , Clayton, Victoria 3168, Australia.|Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton, Victoria 3168, Australia.
Udo
U
Bach