Development of demonstrators for direct solar water splitting

H2Demo

first large-scale demonstrators for direct solar hydrogen production.

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© Dr. Fatwa F. Abdi Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

In Short

About the project

The aim of the H2Demo project is to produce the first large-scale demonstrators for direct solar hydrogen production. This is the absorption of sunlight in a semiconductor structure that generates a sufficiently large photovoltage > 1.6 volts to decompose water directly into hydrogen and oxygen. In the project, particularly promising tandem absorbers made of GaAsP/Si are being developed, which have the best chances of economic viability in combination with high efficiency and scalability.

Work Packages

Work Package 1

Work Package 1

GaAsP/Si Tandem Cell
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Work Package 2

Work Package 2

High Pressure MOVPE Throughput
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Work Packages 3-5

Work Packages 3-5

Photoelectric-Chemical Cell and Module
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Students

Tim Rieth

Tim Rieth

TU München
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Erica Schmitt

Erica Schmitt

University of Tübingen
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Jonas Grutke

Jonas Grutke

TU Ilmenau
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Kai Hanke

Kai Hanke

TU Ilmenau
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Patrick Redmond

Patrick Redmond

Fraunhofer ISE
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Sven Schneider

Sven Schneider

Helmholtz-Zentrum Berlin
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Diwakar Suresh Babu

Diwakar Suresh Babu

Helmholtz-Zentrum Berlin
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Christoph Klein

Christoph Klein

Fraunhofer ISE
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Publications

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Integration of multi-junction absorbers and catalysts for efficient solar-driven artificial leaf structures: a physical and materials science perspective
T. Hannappel, S. Shekarabi, W. Jaegermann, E. Runge, J.P. Hofmann, R. van de Krol, M.M. May, A. Paszuk, F. Hess, A. Bergmann, A. Bund, C. Cierpka, C. Dreßler, F. Dionigi, D. Friedrich, M. Favaro, S. Krischok, M. Kurniawan, K. Lüdge, Y. Lei, B. Roldan Cuenya, P. Schaaf, R. Schmidt-Grund, W.G. Schmidt, P. Strasser, E. Unger, M.V. Montoya, D. Wang, H. Zhang

Solar RRL 8 (2024) 2301047 (1-49)

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Wafer-bonded two-terminal III-V//Si triple-junction solar cell with power conversion efficiency of 36.1% at AM1.5g
Patrick Schygulla, Ralph Müller, Oliver Höhn, Michael Schachtner, David Chojniak, Andrea Cordaro, Stefan Tabernig, Benedikt Bläsi, Albert Polman, Gerald Siefer, David Lackner, Frank Dimroth

Progress in Photovoltaics: Research and Applications

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Photoelectrochemical Schlenk cell functionalization of multi-junction watersplitting photoelectrodes
Erica A. Schmitt, Margot Guidat, Max Nusshör, Anna-Lena Renz, Kristof Möller, Marco Flieg, Daniel Lörch, Moritz Kölbach, Matthias M. May

Cell Reports Physical Science

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(Photo-)electrochemical reactions on semiconductor surfaces, part B: III-V surfaces–atomic and electronic structure
A. Hajduk, M.A. Zare Pour, A. Paszuk, M. Guidat, M. Löw, F. Ullmann, D.C. Moritz, J.P. Hofmann, S. Krischok, E. Runge, W.G. Schmidt, W. Jaegermann, M.M. May, T. Hannappel

Encyclopedia of Solid-Liquid Interfaces (First Edition) (2024) 120-156, ISBN 9780323856706

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Impact of beam size and diffraction effects in the measurement of long-range electric fields in crystalline samples via 4DSTEM
D. Heimes, V.S. Chejarla, S. Ahmed, F. Hüppe, A. Beyer, K. Volz

Ultramicroscopy Vol 253

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Measuring Spatially‐Resolved Potential Drops at Semiconductor Hetero‐Interfaces Using 4D‐STEM
V.S. Chejarla, S. Ahmed, J. Belz, J. Scheunert, A. Beyer, K. Volz

Small Methods

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Generalized Modeling of Photoluminescence Transients
M. Grossmann, S. Bohm, S. Heyder, K. Schwarzburg, P. Kleinschmidt, E. Runge, T. Hannappel

Basic Solid State Physics

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The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices
Moritz Kölbach, Oliver Höhn, Kira Rehfeld, Manuel Finkbeiner, James Barry and Matthias M. May

Sustainable Energy Fuels, 2022,6

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A Route to Obtaining Low-Defect III–V Epilayers on Si(100) Utilizing MOCVD
Manali Nandy, Agnieszka Paszuk, Markus Feifel, Christian Koppka, Peter Kleinschmidt, Frank Dimroth, and Thomas Hannappel

Cryst. Growth Des. 2021, 21, 10, 5603–5613

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Counter-balancing light absorption and ionic transport losses in the electrolyte for integrated solar water splitting with III-V/Si dual-junctions
Moritz Kölbach, Ciler Özen, Oliver Höhn, David Lackner, Markus Feifel, Fatwa F. Abdi and Matthias M. May

Appl. Phys. Lett. 119, 083904 (2021)

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Combining experimental and computational methods to unravel the dynamical structure of photoelectrosynthetic interfaces
Matthias M. May, Wolfram Jaegermann

Current Opinion in Electrochemistry, Volume 34, August 2022

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Combining experimental and computational methods to unravel the dynamical structure of photoelectrosynthetic interfaces
Matthias M. May, and Wolfram Jaegermann

Current Opinion in Electrochemistry, Volume 34, 100968

Blog

News from the project