NOVELTY - An assembly (400) comprises: encapsulant layer (450); first polymeric film substrate (440); barrier film disposed on first surface of the film; pressure sensitive adhesive layer (410) having first surface and a second surface opposite the first surface; and second polymeric film substrate (430) disposed on second surface of adhesive layer, where second polymeric film substrate has second coefficient of thermal expansion which is higher than first thermal expansion, where the assembly is transmissive to visible and infrared light.    USE - As an assembly useful for encapsulating photovoltaic cell (claimed), and solar cell.    ADVANTAGE - The assembly is flexible, transmissive to visible and infrared light; and has excellent barrier properties.    DETAILED DESCRIPTION - An assembly (400) comprises: encapsulant layer (450); first polymeric film substrate (440) having first surface, second surface opposite the first surface, and first coefficient of thermal expansion, where the second surface of the first polymeric film substrate is disposed on the encapsulant layer; barrier film disposed on the first surface of the first polymeric film; pressure sensitive adhesive layer (410) having first surface and second surface opposite the first surface, where the first surface of the pressure sensitive adhesive is disposed on the barrier film opposite the first polymeric film substrate; and second polymeric film substrate (430) disposed on the second surface of the pressure sensitive adhesive layer, where the second polymeric film substrate has a second coefficient of thermal expansion, which is higher than the first coefficient of thermal expansion, where the assembly is transmissive to visible and infrared light. The encapsulant layer is on a photovoltaic cell (460).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic side view of an assembly including photovoltaic module.    Assembly (400)    Pressure sensitive adhesive layer (410)    Second polymeric film substrate (430)    First polymeric film substrate (440)    Encapsulant layer (450)    Photovoltaic cell (460)