Efficient direct solar-to-hydrogen conversion by in situ interface transformation of a tandem structure
Abstract
Photosynthesis is nature's route to convert intermittent solar irradiation into storable energy, while its use for an industrial energy supply is impaired by low efficiency. Artificial photosynthesis provides a promising alternative for efficient robust carbon-neutral renewable energy generation. The approach of direct hydrogen generation by photoelectrochemical water splitting utilizes customized tandem absorber structures to mimic the Z-scheme of natural photosynthesis. Here a combined chemical surface transformation of a tandem structure and catalyst deposition at ambient temperature yields photocurrents approaching the theoretical limit of the absorber and results in a solar-to-hydrogen efficiency of 14%. The potentiostatically assisted photoelectrode efficiency is 17%. Present benchmarks for integrated systems are clearly exceeded. Details of the in situ interface transformation, the electronic improvement and chemical passivation are presented. The surface functionalization procedure is widely applicable and can be precisely controlled, allowing further developments of high-efficiency robust hydrogen generators.
- Authors:
-
[1];
- Institute for Solar Fuels, Berlin (Germany). Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Technische Universität Ilmenau (Germany). Department of Physcis; Humboldt-Universität zu Berlin (Germany). Department of Physics
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP)
- Fraunhofer Institute for Solar Energy Systems ISE, Freiburg (Germany)
- Technische Universität Ilmenau (Germany). Department of Physcis
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1457517
- Grant/Contract Number:
- SC0004993
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 30 DIRECT ENERGY CONVERSION
Citation Formats
May, Matthias M., Lewerenz, Hans-Joachim, Lackner, David, Dimroth, Frank, and Hannappel, Thomas. Efficient direct solar-to-hydrogen conversion by in situ interface transformation of a tandem structure. United States: N. p., 2015.
Web. doi:10.1038/ncomms9286.
May, Matthias M., Lewerenz, Hans-Joachim, Lackner, David, Dimroth, Frank, & Hannappel, Thomas. Efficient direct solar-to-hydrogen conversion by in situ interface transformation of a tandem structure. United States. https://doi.org/10.1038/ncomms9286
May, Matthias M., Lewerenz, Hans-Joachim, Lackner, David, Dimroth, Frank, and Hannappel, Thomas. Tue .
"Efficient direct solar-to-hydrogen conversion by in situ interface transformation of a tandem structure". United States. https://doi.org/10.1038/ncomms9286. https://www.osti.gov/servlets/purl/1457517.
@article{osti_1457517,
title = {Efficient direct solar-to-hydrogen conversion by in situ interface transformation of a tandem structure},
author = {May, Matthias M. and Lewerenz, Hans-Joachim and Lackner, David and Dimroth, Frank and Hannappel, Thomas},
abstractNote = {Photosynthesis is nature's route to convert intermittent solar irradiation into storable energy, while its use for an industrial energy supply is impaired by low efficiency. Artificial photosynthesis provides a promising alternative for efficient robust carbon-neutral renewable energy generation. The approach of direct hydrogen generation by photoelectrochemical water splitting utilizes customized tandem absorber structures to mimic the Z-scheme of natural photosynthesis. Here a combined chemical surface transformation of a tandem structure and catalyst deposition at ambient temperature yields photocurrents approaching the theoretical limit of the absorber and results in a solar-to-hydrogen efficiency of 14%. The potentiostatically assisted photoelectrode efficiency is 17%. Present benchmarks for integrated systems are clearly exceeded. Details of the in situ interface transformation, the electronic improvement and chemical passivation are presented. The surface functionalization procedure is widely applicable and can be precisely controlled, allowing further developments of high-efficiency robust hydrogen generators.},
doi = {10.1038/ncomms9286},
journal = {Nature Communications},
number = 1,
volume = 6,
place = {United States},
year = {2015},
month = {9}
}
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- Nature Communications, Vol. 7, Issue 1
Efficient solar hydrogen generation in microgravity environment
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An efficient and stable photoelectrochemical system with 9% solar-to-hydrogen conversion efficiency via InGaP/GaAs double junction
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A miniature solar device for overall water splitting consisting of series-connected spherical silicon solar cells
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Efficiency gains for thermally coupled solar hydrogen production in extreme cold
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- Universität Ulm