Metasurface photoelectrodes for enhanced solar fuel generation
| Autor: | Markus Becherer, Ludwig Hüttenhofer, Oliver Bienek, Fedja J. Wendisch, Matthias Golibrzuch, Stefan A. Maier, Emiliano Cortés, Rui Lin, Ian D. Sharp |
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| Přispěvatelé: | Engineering & Physical Science Research Council (E |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Hydrogen Energy & Fuels nanoimprints Materials Science chemistry.chemical_element Materials Science Multidisciplinary 02 engineering and technology 010402 general chemistry 0915 Interdisciplinary Engineering 7. Clean energy 01 natural sciences water splitting Physics Applied chemistry.chemical_compound Gallium phosphide NANOPHOTONICS surface lattice resonance ABSORPTION General Materials Science 0912 Materials Engineering Science & Technology Renewable Energy Sustainability and the Environment business.industry Chemistry Physical semiconductor photocatalysis Physics 3RD HARMONIC-GENERATION GAP 0303 Macromolecular and Materials Chemistry 021001 nanoscience & nanotechnology Solar fuel anapole 0104 chemical sciences AMORPHOUS GALLIUM-PHOSPHIDE Chemistry REDUCTION chemistry Physics Condensed Matter hydrogen Physical Sciences gallium phosphide Optoelectronics Water splitting CO2 0210 nano-technology business |
| Zdroj: | Advanced Energy Materials |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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