@article{44c3ef94fb3746048485044b6dcebb9e,
title = "Metasurface Photoelectrodes for Enhanced Solar Fuel Generation",
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.",
keywords = "anapole, gallium phosphide, hydrogen, nanoimprints, semiconductor photocatalysis, surface lattice resonance, water splitting",
author = "Ludwig H{\"u}ttenhofer and Matthias Golibrzuch and Oliver Bienek and Wendisch, \{Fedja J.\} and Rui Lin and Markus Becherer and Sharp, \{Ian D.\} and Maier, \{Stefan A.\} and Emiliano Cort{\'e}s",
note = "Funding Information: The authors acknowledge the funding and support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany´s Excellence Strategy – EXC 2089/1 – 390776260, the Bavarian program Solar Energies Go Hybrid (SolTech), the Center for NanoScience (CeNS), and the European Commission through the ERC Starting Grant CATALIGHT (802989). The authors also acknowledge the support of the Central Electronics and Information Technology Laboratory—ZEIT. M.G. was supported by TUM International Graduate School of Science and Engineering (IGSSE). O.B. received support from the Federal Ministry of Education and Research (BMBF, Germany) project number 033RC021B within the CO2‐WIN initiative. The authors thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for funding (project number 245845833) within International Research Training Group IRTG 2022 – Alberta Technical University of Munich School for Functional Hybrid Materials (ATUMS). S.A.M. additionally acknowledges the Lee‐Lucas Chair in Physics and the EPSRC Reactive Plasmonics Programme (EP/M013812/1). lab Funding Information: The authors acknowledge the funding and support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany?s Excellence Strategy ? EXC 2089/1 ? 390776260, the Bavarian program Solar Energies Go Hybrid (SolTech), the Center for NanoScience (CeNS), and the European Commission through the ERC Starting Grant CATALIGHT (802989). The authors also acknowledge the support of the Central Electronics and Information Technology Laboratory?ZEITlab. M.G. was supported by TUM International Graduate School of Science and Engineering (IGSSE). O.B. received support from the Federal Ministry of Education and Research (BMBF, Germany) project number 033RC021B within the CO2-WIN initiative. The authors thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for funding (project number 245845833) within International Research Training Group IRTG 2022 ? Alberta Technical University of Munich School for Functional Hybrid Materials (ATUMS). S.A.M. additionally acknowledges the Lee-Lucas Chair in Physics and the EPSRC Reactive Plasmonics Programme (EP/M013812/1). Publisher Copyright: {\textcopyright} 2021 The Authors. Advanced Energy Materials published by Wiley-VCH GmbH",
year = "2021",
month = dec,
day = "9",
doi = "10.1002/aenm.202102877",
language = "English",
volume = "11",
journal = "Advanced Energy Materials",
issn = "1614-6840",
publisher = "Wiley-VCH Verlag GmbH \& Co. KGaA",
number = "46",
}
SDG 7 Affordable and Clean Energy