Quantum dot sensitized solar cells are in need of a highly active, stable, and inexpensive cathode material for practical devices. We predicted MoS2 would be an excellent cathode material for the reduction of the polysulfide electrolyte, but needed a preparation that exposed a large number of the catalytic edge sites. We show a new, facile, hydrothermal preparation of nanostructured MoS2. Grown directly from a planar Mo metal foil, the MoS2 films have a petaled morphology that exposes a large number of edge sites, and are highly active and stable for the electrochemical reduction of water and aqueous polysulfide. We also present preliminary results of its performance in solar devices, demonstrating superior QDSSC efficiency and stability compared to the use of Pt cathodes.

Petaled MoS<sub>2</sub> films as cathodes for polysulfide reduction

247th National Meeting (2014)

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Petaled MoS2 films as cathodes for polysulfide reduction

Petaled MoS₂ films as cathodes for polysulfide reduction