TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The solar cell is chosen from monocrystalline silicon solar cell, polycrystalline silicon solar cell and nano-silicon solar cells. The thin-film solar cell is chosen from non-crystalline thin-film silicon solar cell, cadmium telluride thin-film solar cell, and copper-indium gallium selenide thin-film solar cell.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The polyester substrate further comprises a coat of metal, metal oxide, or non-metal oxide. The poly(2-6C)alkylene phthalate is chosen from polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyhexylene terephthalate, polyethylene o-phthalate, polytrimethylene o-phthalate, polybutylene o-phthalate and polyhexylene o-phthalate. The poly(2-6C)alkylene naphthalate is chosen from polyethylene naphthalate, polytrimethylene naphthalate and polybutylene naphthalate. The fluorine-containing polymer is chosen from polymer of fluoroethylene, copolymer of fluoroethylene and other non-fluorinated, partially-fluorinated or perfluorinated monomer, polymer of vinylidene fluoride, copolymer of vinylidene fluoride and other non-fluorinated, partially-fluorinated or perfluorinated monomer, polymer of chlorotrifluoroethylene, copolymer of chlorotrifluoroethylene and other non-fluorinated, partially-fluorinated or perfluorinated monomer, polymer of tetrafluoroethylene, and copolymer of tetrafluoroethylene and other non-fluorinated, partially-fluorinated or perfluorinated monomer. The other non-fluorinated, partially-fluorinated or perfluorinated monomers are chosen from ethylene, propylene, fluoroethylene, ethylene difluoride, vinylidene fluoride, chlorotrifluoroethylene, hexafluoropropylene, tetrafluoroethylene, perfluoroalkoxyvinyl ether and perfluoropropylene. The polyester substrate comprises layer comprising copolymer chosen from poly(2-6C)alkylene phthalate and poly(2-6C)alkylene naphthalate and layer comprising polyfluoroethylene or polyvinylidene fluoride. The bonding layer comprises copolymer of ethylene and one or more monomers chosen from methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, butyl acrylate, glycidyl methacrylate and maleic anhydride. The copolymer of the bonding layer is chosen from ethylene-methyl acrylate-methacrylic acid terpolymer, ethylene-butyl acrylate-methacrylic acid terpolymer, ethylene-propyl methacrylate-acrylic acid terpolymer, ethylene-butyl acrylate-glycidyl methacrylate terpolymer, and ethylene-methyl acrylate-maleic anhydride terpolymer, preferably ethylene-butyl acrylate-glycidyl methacrylate terpolymer including 50-99 wt.% of ethylene, 2-30 wt.% of butyl acrylate, and 1-15 wt.% of glycidyl methacrylate. The bonding layer is a single layer or multilayered laminate of copolymer of ethylene and one or more monomer chosen from 1-4C alkyl acrylate, 1-4C alkyl methacrylate, methacrylic acid, glycidyl methacrylate, and maleic anhydride. The bonding layer further comprises one or more polymer sheets formed by polymer materials chosen from polyethylene, polypropylene, ethylene-propylene copolymers, ethylene-(1-4C) alkyl methacrylate copolymers, ethylene-methacrylic acid copolymer, ethylene-maleic anhydride copolymer, copolymers derived from ethylene and at least two monomers chosen from 1-4C alkyl methacrylate, methacrylic acid and maleic anhydride and glycidyl methacrylate-containing copolymers formed from ethylene and glycidyl methacrylate and co-monomer chosen from 1-4C alkyl methacrylate, methacrylic acid and maleic anhydride. The polyethylene is chosen from high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene and metallocene-derived low density polyethylene. The polypropylene is homopolypropylene. The laminated film further comprises primer layer including imine or amine-type primer between the polyester substrate and the bonding layer. The adhesive layer comprises polyurethane. The solar cell(s) is encapsulated with ethylene-vinyl acetate copolymer. The polymeric encapsulant comprises ethylene-vinyl acetate copolymer. The bonding layer is extrusion-coated on the substrate. Preferred Properties: The bonding layer has thickness of 10-400 microns. The primer layer has thickness of less than 0.99 microns. Preferred Process: The method further involves applying primer layer on the surface (b) of the polyester substrate before the bonding layer is extruded on the surface (b) of the polyester substrate and applying corona treatment or flame treatment to the surface (b) of the polyester substrate before the bonding layer is extruded on the surface (b) of the polyester substrate.