EP02.09.02 : Plasmonic Hot Electron Solar Cells—The Effect of Nanoparticle Size on Quantum Efficiency

5:00 PM–7:00 PM Apr 4, 2018

PCC North, 300 Level, Exhibit Hall C-E

Philipp Reineck3 Delia Brick1 P. Mulvaney2 Udo Bach1

3, RMIT University, Melbourne, Victoria, Australia
1, Monash University, Clayton, Victoria, Australia
2, University of Melbourne, Melbourne, Victoria, Australia

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.