TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The method (M1) further involves providing photovoltaic device encapsulated by the second substrate. The first substrate is ethylene-tetrafluoroethylene (ETFE), copolymers of ethylene and chlorotrifluoroethylene (ECTFE), homopolymers of chlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), or fluorinated ethylene propylene (FEP). The second substrate is olefin polymer or copolymer, functionalized polyolefin, ionomer, thermoplastic silicone, polyvinylbutryal, and/or thermoplastic urethane. The polar functionality of the first substrate is a part of the polymeric backbone of the fluoropolymer and from surface modification of substrate, where the surface modification is by corona discharge or plasma. The corona treatment is conducted in the presence of solvent atmosphere. The second substrate is a modified fluoropolymer having polar functionality. The laminate has an adhesive strength of at least 5 N/inch measured by ASTM D-903. EXAMPLE - An unmodified ethylene-tetrafluoroethylene (ETFE) resin was extruded into 2 mils film and surface treated by corona in presence of acetone vapors with nitrogen blanketing. The film was passed beneath the corona electrodes at a distance of 1 mm at speed of 100 feet per minute, using power source of 7.8 kW to deliver a treatment strength or watt density of 12-16 kW/ft2/min. A polyolefin resin Notio PN3560 (RTM: polyolefin elastomer) was pressed out into 7 mils film using heated press set at 350 F under 15 tons for 5 minutes. Then, the ETFE and polyolefin films were heat laminated with a cheminstruments HL-100 hot roll laminator with a nip pressure dial setting of 40 psi and speed of 2.6 fpm. The upper roll was anodized Teflon coated aluminum. The lower roll was aluminum covered with 80 durometer silicone rubber. Finally, the laminate was irradiated by ultraviolet (UV) wavelength with using 600W H-Bulb. Laminates were placed on a belt advancing at a rate of 12 feet/min with the fluoropolymer layer facing the ceiling. The UV source irradiated the sample in between a 1 inch wide gap; therefore the irradiation time was 0.4 second for each pass. A total of five passes was used to treat the laminate, which makes the total irradiation time of 2 seconds and a dose of 194 J/cm2. The adhesion was measured by a T-peel test method using a crosshead speed of 2 inches per minutes.