Flexible superstrate solar cells were directly grown on commercially available 10 mm thin polyimide (UpilexTM) foils. A process for the deposition of ITO (front contact) has been developed to have a stable front contact on the UpilexTM foil. Post-deposition annealing treatments of the ITO/polyimide stacks bring a significant stability to the front contact, having almost the same sheet resistance at the beginning and at the end of the cell fabrication process. Solar cells with AM1.5 efficiency of 11.4% on UpilexTM foils (highest efficiency recorded for flexible CdTe cell) have been developed. A comparison of the cells prepared on different polyimides is presented.
High Efficiency flexible CdTe solar cells on polymer substrates
ROMEO, Alessandro;
2006-01-01
Abstract
Flexible superstrate solar cells were directly grown on commercially available 10 mm thin polyimide (UpilexTM) foils. A process for the deposition of ITO (front contact) has been developed to have a stable front contact on the UpilexTM foil. Post-deposition annealing treatments of the ITO/polyimide stacks bring a significant stability to the front contact, having almost the same sheet resistance at the beginning and at the end of the cell fabrication process. Solar cells with AM1.5 efficiency of 11.4% on UpilexTM foils (highest efficiency recorded for flexible CdTe cell) have been developed. A comparison of the cells prepared on different polyimides is presented.
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