Rocking disc electro-deposition of CuIn alloys, selenisation, and pinhole effect minimisation in CISe solar absorber layers

The co-electrodeposition of copper and indium from a pH 3 tartrate bath onto 4.8cm×2.5cm Mo and MoSe2 substrates is studied and conditions are optimised for CuIn alloy films. Selenisation at ca. 500°C for 30min in selenium vapour gives CuInSe2 (or CISe). Mapping using the photo-electrochemical reduction of Eu(NO3)3 is used to asses the relative photoactivity as a function of position and surface treatment.