A Three Stage Selenization Process for the Preparation of High Efficiency CuInGaSe2/ CdS Thin Films Solar Cells

CuGaInSe2/CdS thin film solar cell with an efficiency in excess of 15% have been prepared by a novel three stage selenization method. The first stage consists in the deposition of Cu, In Ga elemental layer on Mo covered soda lime glass and selenization of the layers in a Se vapour. For the second and third stage only Cu and Ga are used as elemental layers in order to increase the amount of Ga in CuGaInsSe2 film

Cadmium and Zinc Chloride Treatments of CdS films for the preparation of High Efficiency CdTe/CdS Thin Films Solar Cells

CdTe/CdS thin film solar cells exhibiting conversion efficiency close to 14% have been prepared on glass substrates by treating the CdS film with ZnCl2 and CdCl2. This treatment has shown to be effective in rendering the CdS film less reactive with CdTe when this is deposited on top of CdS by Close Spaced Sublimation at a substrate temperature of 500-520\ub0C. This limits the interdiffusion between CdS and CdTe during the cell preparation and improves both the open-cicruit voltage and fill factor of the solar cell