Metasurface photoelectrodes for enhanced solar fuel generation
File(s)
Author(s)
Type
Journal Article
Abstract
Tailoring optical properties in photocatalysts by nanostructuring them can help increase solar light harvesting efficiencies in a wide range of materials. Whereas plasmon resonances are widely employed in metallic catalysts for this purpose, latest advances of nonradiative, dielectric nanophotonics also enable light confinement and enhanced visible light absorption in semiconductors. Here, a design procedure for large-scale nanofabrication of semiconductor photoelectrodes using imprint lithography is developed. Anapole excitations and metasurface lattice resonances are combined to enhance the absorption of the model material, amorphous gallium phosphide (a-GaP), over the visible spectrum. It is shown that cost-effective, high sample throughput is achieved while retaining the precise signature of the engineered photonic states. Photoelectrochemical measurements under hydrogen evolution reaction conditions and sunlight illumination reveal the contributions of the respective resonances and demonstrate an overall photocurrent enhancement of 5.7, compared to a planar film. These results are supported by optical and numerical analysis of single nanodisks and of the upscaled metasurface.https://onlinelibrary.wiley.com/doi/10.1002/aenm.202102877
Date Issued
2021-10-27
Date Acceptance
2021-10-09
Citation
Advanced Energy Materials, 2021, 11 (46)
ISSN
1614-6832
Publisher
Wiley-VCH Verlag
Journal / Book Title
Advanced Energy Materials
Volume
11
Issue
46
Copyright Statement
© 2021 The Authors. Advanced Energy Materials published by Wiley-VCH GmbH
License URL
Sponsor
Engineering & Physical Science Research Council (E
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000711526500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/M013812/1
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
anapole
gallium phosphide
hydrogen
nanoimprints
semiconductor photocatalysis
surface lattice resonance
water splitting
AMORPHOUS GALLIUM-PHOSPHIDE
3RD HARMONIC-GENERATION
ABSORPTION
NANOPHOTONICS
REDUCTION
GAP
CO2
Publication Status
Published
Article Number
ARTN 2102877