TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The acid terpolymer: comprises 18-25 wt.% of copolymerized units of the alpha , beta -ethylenically unsaturated carboxylic acid and 0.5-5 (preferably 15-40) wt.% of copolymerized units of the alpha , beta -ethylenically unsaturated carboxylic acid ester; and has 10-50 (preferably 20-40)% of its carboxylic acid content neutralized. The terionomer is derived from a poly(ethylene-co-butyl acrylate-co-methacrylic acid) that has 20-40% of its carboxylic acid content neutralized with metallic ions comprising zinc (preferred), sodium, lithium and/or magnesium. The film or sheet comprised of the terionomer composition is in a multilayer form and comprises a first surface sub-layer, a second surface sub-layer, and optionally one or more inner sub-layers, where the first surface sub-layers comprises or is made of the terionomer composition and each of the other sub-layers comprise or are made of a polymer material comprising acid copolymers, ionomers, ethylene vinyl acetates, poly(vinyl acetals), polyurethanes, polyvinylchlorides, polyethylenes, polyolefin block elastomers, poly( alpha -olefin-co- alpha , beta -ethylenically unsaturated carboxylic acid ester) copolymers, silicone elastomers and/or epoxy resins. The film or sheet comprised of the terionomer composition has its second surface sub-layer, at least one of the optional inner sub-layers, or both, comprising or formed of an ionomer having a melting point of at least 80 degrees C. The film or sheet comprised of the terionomer composition has each of its first and second surface sub-layers comprising or made of the terionomer composition and at least one inner sub-layer comprising or made of the ionomer having a melting point of at least 80 degrees C. The inner sub-layer comprises or is made of the ionomer having a melting point of at least 90 degrees C. The film or sheet comprised of the terionomer composition has a total thickness of 2 mils (0.051 mm) to 20 mils (0.51 mm). In (I), each of the first and second surface sub-layers have a thickness of 0.5 mils (0.013 mm) to 5 mils (0.13 mm); and the total thickness of the multilayer film or sheet is 2 mils (0.051 mm) to 20 mils (0.51 mm). The film or sheet comprised of the terionomer composition has undergone an adhesion enhancing treatment on its surfaces. The solar cell pre-lamination assembly comprises a front encapsulant layer positioned next to the light-receiving side of the solar cell component and a back encapsulant layer positioned next to the back side of the solar cell component, where the front encapsulant layer is formed of the film or sheet comprised of the terionomer composition, and the back encapsulant layer is formed of a polymeric material containing acid copolymers, ionomers, ethylene vinyl acetates, poly(vinyl acetals), polyurethanes, polyvinylchlorides, polyethylenes, polyolefin block elastomers, poly( alpha -olefin-co- alpha , beta -ethylenically unsaturated carboxylic acid ester) copolymers, silicone elastomers and/or epoxy resins. In (I), each of the front encapsulant layer and the back encapsulant layer comprises or is formed of the film or sheet comprised of the terionomer composition. The solar cell pre-lamination assembly further comprises an incident layer positioned next to the front encapsulant layer and a backing layer positioned next to the back encapsulant layer. The incident layer and the backing layer comprises or is formed of: glass sheets; polymeric sheets comprised of or formed of polycarbonates, acrylics, polyacrylates, cyclic polyolefins, polystyrenes, polyamides, polyesters and/or fluoropolymers; or polymeric films comprised of or formed of polyesters, polycarbonate, polyolefins, norbornene polymers, polystyrene, styrene-acrylate copolymers, acrylonitrile-styrene copolymers, polysulfones, nylons, polyurethanes, acrylics, cellulose acetates, Cellophane (RTM: Flexible, transparent film made of regenerated cellulose), poly(vinyl chlorides) and/or fluoropolymers. The solar cell pre-lamination assembly contains essentially of, from a top side that faces the light source to a bottom side that is opposite from the light source, an incident layer that is positioned next to, a front encapsulant layer that is positioned next to, the solar cell component that is positioned next to, a back encapsulant layer that is positioned next to, a backing layer, where one or both of the two encapsulant layers are formed of the film or sheet comprised of the terionomer composition. Preferred Process: The laminating step is conducted by subjecting the assembly to heat. The laminating step further comprises subjecting the assembly to vacuum or pressure.