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Issue 9, 2013
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A H2-evolving photocathode based on direct sensitization of MoS3 with an organic photovoltaic cell

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Abstract

An organic solar cell based on a poly-3-hexylthiophene (P3HT):phenyl-C61-butyric acid (PCBM) bulk hetero-junction was directly coupled to molybdenum sulfide resulting in the design of a new type of photocathode for the production of hydrogen. Both the light-harvesting system and the catalyst were deposited by low-cost solution-processed methods, i.e. spin coating and spray coating respectively. Spray-coated MoS3 films are catalytically active in strongly acidic aqueous solutions with the best efficiencies for thicknesses of 40 to 90 nm. The photocathodes display photocurrents higher than reference samples, without a catalyst or without coupling with a solar cell. Gas chromatography analysis confirms the light-induced hydrogen evolution. The addition of titanium dioxide in the MoS3 film enhances electron transport and collection within thick films and therefore the performance of the photocathode.

Graphical abstract: A H2-evolving photocathode based on direct sensitization of MoS3 with an organic photovoltaic cell

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Article information


Submitted
18 Apr 2013
Accepted
26 Jun 2013
First published
04 Jul 2013

Energy Environ. Sci., 2013,6, 2706-2713
Article type
Paper

A H2-evolving photocathode based on direct sensitization of MoS3 with an organic photovoltaic cell

T. Bourgeteau, D. Tondelier, B. Geffroy, R. Brisse, C. Laberty-Robert, S. Campidelli, R. de Bettignies, V. Artero, S. Palacin and B. Jousselme, Energy Environ. Sci., 2013, 6, 2706
DOI: 10.1039/C3EE41321G

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