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Perovskite Solar Cell Produces Hydrogen at 12.3% Efficiency

Elektrolyse
Hydrogen and oxygen bubbles.

Solar panels are on the march worldwide. One of the disadvantages of solar power however is its intermittent character, making storage an essential ingredient of every solar based energy system. Researchers of the École Polytechnique Fédérale de Lausanne (epfl) have presented a new Perovskite solar cell able to split water and produce hydrogen at an acceptable efficiency of 12.3%. Hope exists that this efficiency could increase to 20% by applying semi-conductors. This could breathe new life into the moribund hydrogen economy. As things stand now large scale hydro storage is the most attractive proposition backing up a large scale renewable energy system.

[spiegel.de] – Billig-Zelle verwandelt Licht in Wasserstoff
[sciencemag.org] – Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts
[wikipedia] – Michael Grätzel
[cleantechnica.com] – Perovskite Solar Cells Beat New Records (In The Lab)

Note that Lausanne combined perovskite solar cells with electrochemistry.

[sciencenews.org]

Over the last five years, perovskites have been found to rival the efficiency and cost of silicon in converting sunlight to electricity.

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