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Photoelectrochemical water splitting

A photoelectrochemical (PEC) water splitting cell uses solar energy to split water into oxygen and hydrogen. Hydrogen is an excellent chemical fuel and can be efficiently transformed into electrical energy by a fuel cell. The flexibility of transforming solar energy to hydrogen and back to electricity is a promising step towards a hydrogen energy economy.

At ICP, we aim to understand the physics of PEC water splitting and describe the optical and electronic processes with numerical models. Our models are used for understanding the efficiency bottlenecks of PEC cells in order to bring them closer to industrial application.

Energy band diagram of the semiconductor-electrolyte junction, online calculation tool https://home.zhaw.ch/~cend/PEC/.
Energy band diagram of the semiconductor-electrolyte junction, online calculation tool.

 

 

Links

Publications

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    Targeting Ideal Dual-Absorber Tandem Water Splitting Using Perovskite Photovoltaics and CuInxGa1-xSe2 Photocathodes

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    Advanced Energy Materials Peer reviewed.

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    Energy Diagram of Semiconductor/Electrolyte Junctions

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    The Journal of Physical Chemistry Letters, 5 205-207. Peer reviewed.

Funding

  • Swiss Federal Office of Energy
    Swiss Federal Office of Energy
  • Swiss National Science Foundation
    Swiss National Science Foundation