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We propose a new architecture of metal-insulator-metal devices for solar energy harvesting at infrared and visible
frequencies based on asymmetrical alignment of insulating barrier relative to the Fermi level of metals and spatial
localization of hot electrons excited by photons. Photons absorbed by metals create hot electrons, which can transmit
through the thin insulating barrier, producing current. We theoretically investigated the photocurrent response and power
generations at different wavelengths. Short circuit current and open circuit voltage can be easily tuned by changing metal
thicknesses to adjust the forward and reverse photocurrent. By employing surface plasmons, power generation efficiency
is enhanced 9 times in a grating MIM device compared to direct illumination at 650 nm. Finally, we compared the
enhancement of power generation efficiency by SPs excited through grating structure and Kretschmann coupling system.
Fuming Wang andNicholas A. Melosh
"Theoretical analysis of hot electron collection in metal-insulator-metal devices", Proc. SPIE 8111, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion II, 81110O (20 September 2011); https://doi.org/10.1117/12.894250
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Fuming Wang, Nicholas A. Melosh, "Theoretical analysis of hot electron collection in metal-insulator-metal devices," Proc. SPIE 8111, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion II, 81110O (20 September 2011); https://doi.org/10.1117/12.894250