Electrochemical photovoltaic systems: Some advances in ferrocene-protected n-doped silicon cells

The use of photoelectrochemical cells - those comprising doped semiconductor in contact with electrolyte solution requires a layer of protectant to prevent corrosion at the interface. The role of a variety of ferrocene compounds is examined, and one of these. (dichloromethylsilyl) ferrocene, is encouragingly effective. The scope for varying experimental parameters gives indications of where real advances are to be made.