Checking the stoichiometry of I-III-VI layers for use in photovoltaic using improved electrolysis conditions

Manufacturing process for a compound for photovoltaic applications, in thin layer form, including the steps of:

• a) electrodeposition of a layer structure comprising a succession of elemental layers of at least the respective X and Y elements, where X is an element among the elements I and III and Y is the other of the elements I and III, on the surface of one and a same electrode, and
• b) incorporating at least one element VI in the structure to obtain the compound,
• wherein the electrodeposition step a) comprises an operation of mechanical sweeping to control the layer thickness to less than 3% variation in uniformity of thickness over the surface of the electrode receiving the deposition,
• in that the mechanical sweeping operation involves at least two electrolytic bath stirrers in front of the surface of the electrode, the two stirrers having phased back-and-forth movements parallel to the surface of the electrode, having the same speed and same amplitude,
• and in that, each stirrer having a predetermined thickness and the stirrers being spaced by a predetermined distance, the movement amplitude of each stirrer is:
• greater than the distance between the stirrers less one stirrer thickness, and
• less than twice the distance between the stirrers.