NOVELTY - The photovoltaic cell assembly comprises flexible, thin film, crystalline photovoltaic cells (34), an elastomeric film (30) comprising an isobutylene-based elastomer and a transparent encapsulant (38) between which the photovoltaic cell is sandwiched, and a tie-layer sandwiched between the photovoltaic cells and the elastomeric film. The tie-layer is a blend of 1-99 wt.% a material that comprises the transparent film, and 99-1 wt.% of the materials that comprise the elastomeric film. A sealing layer contacts the transparent film and the tie-layer around the photovoltaic cells.    USE - The photovoltaic cell assembly is useful for end use articles including roofing shingles, automotive components, building components, and solar arrays.    ADVANTAGE - The photovoltaic cell assembly is electrically non-conductive, moisture impermeable and oxygen impermeable, can be easily and efficiently fabricated with excellent structural integrity, strength and flexibility, and can be easily folded and cornered or conforms to any desirable shape or profile.    DETAILED DESCRIPTION - The photovoltaic cell assembly comprises flexible, thin film, crystalline photovoltaic cells (34), an elastomeric film (30) comprising an isobutylene-based elastomer and a transparent encapsulant (38) between which the photovoltaic cell is sandwiched, and a tie-layer sandwiched between the photovoltaic cells and the elastomeric film. The tie-layer is a blend of 1-99 wt.% a material that comprises the transparent film, and 99-1 wt.% of the materials that comprise the elastomeric film. A sealing layer contacts the transparent film and the tie-layer around the photovoltaic cells, and is applied at the edges of the voltaic cell to achieve electrical isolation. The sealing layer is a blend of the material that makes up the transparent film and the elastomeric film or continuous layer of material adjacent to the photovoltaic cell. The elastomeric film comprises a non-conductive filler (5-85 wt.%). A substrate layer (32) is placed adjacent to and sandwiched between the photovoltaic cell and the elastomeric film. An INDEPENDENT CLAIM is included for a method of making a photovoltaic cell assembly.    DESCRIPTION OF DRAWING(S) - The diagram shows a side-view cutaway diagram of the photovoltaic assembly.    Elastomeric film (30)    Substrate layer (32)    Photovoltaic cells (34)    Electrical lead (36)    Transparent encapsulant. (38)