Controlled thermomechanical delamination of thin films
AssigneeAlliance for Sustainable Energy, LLC
InventorsMatthew Owen Reese, Deborah Lee McGott, Michael David Kempe, Teresa Marie Barnes, Colin Andrew Wolden
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Abstract
Disclosed herein are CdTe-based solar cells that are successfully removed from their glass superstrate through a combination of lamination to a backsheet followed by thermal shock.
Claims20
A method for making a polycrystalline device stack film comprising the steps of laminating a polycrystalline device stack on a substrate to a stressor layer wherein the stressor layer and the polycrystalline device stack have a coefficient of thermal expansion (CTE) mismatch between the stressor layer and the polycrystalline device stack and wherein the polycrystalline device stack is delaminated from the substrate to make the polycrystalline device stack film.
A method for a crack-free liftoff of a polycrystalline device stack film that comprises first laminating a polycrystalline device stack device to a polymeric handle and then using materials with a coefficient of thermal expansion (CTE) mismatch between a stressor layer and a substrate to delaminate the polycrystalline device stack film at temperatures less than about −30° C.
Dependencies are inferred from the claim text.