Transparent Catalytic Nickel Oxide Protecting
Films for Photoanodes
Reactively sputtered NiOx layer provides a transparent, anti-reflective, conductive, chemically stable, inherently catalytic coating that stabilizes many efficient and technologically important semiconducting photoanodes.
Significance & impact
Demonstrated protection scheme allows the use of many high-efficiency, small-band-gap photoanodes in an integrated water-splitting device.
Top: SEM image of a cross-section of a sputtered NiOx film; Bottom: Optical images of
NiOxfilms exhibit overpotentialswithin 70 mVof the lowest value reported to date for water oxidation in 1.0 M KOH at 10 mA/cm2.
- The optical properties of NiOx films are consistent with those typically exhibited by transparent conducting oxides.
- NiO-coated electrodes showed more than 1000-h stable operation in 1 M KOH under 1 Sun illumination.