TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: Auxiliary agent comprises 0.02-0.7 wt.%, preferably 0.05-0.4 wt.% UV light stabilizer, 0.02-0.7 wt.%, preferably 0.05-0.4 wt.% auxiliary antioxidant, 0.02-0.7 wt.%, preferably 0.05-0.4 wt.% tackifier, 0.02-0.7 wt.%, preferably 0.05-0.4 wt.% flame retardant, and/or 0.02-0.7 wt.%, preferably 0.05-0.4 wt.% antacids. UV-light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidyl) sebacic acid ester, auxiliary antioxidant is tris(4-nonylphenyl)phosphite and/or tris(2,4-di-tert.-butylphenyl)phosphite, preferably tris(4-nonylphenyl)phosphite and tris(2,4-di-tert.-butylphenyl)phosphite composite, tackifier is gamma -methacryloxypropyl trimethoxysilane, flame retardant is trioctyl phosphate, and antacid is calcium stearate.    TECHNOLOGY FOCUS - POLYMERS - Preferred Compositions: Photovoltaic EVA film comprises 0.1-2 wt.% crosslinking agent, 0.1-2 wt.% auxiliary crosslinking agent, 0.5-5 wt.% polyolefin ionomer, 0.2-2 wt.% hydrophobic agent, auxiliary agents, and balance EVA. Crosslinking agent is tert.-butylperoxy-2-ethylhexyl carbonate, auxiliary crosslinking agent is triallyl isocyanurate and/or trimethylolpropane trimethacrylate, preferably triallyl isocyanurate and trimethylolpropane trimethacrylate composite, polyolefin ionomer is polyethylene-methacrylic acid metal salt, polystyrene sulfonic acid metal salt, and/or sarin resin, preferably polyethylene-sodium methacrylate, polyethylene-potassium methacrylate, polyethylene-lithium methacrylate, polyethylene-zinc methacrylate, polyethylene-calcium methacrylate, sodium polystyrene sulfonate, potassium polystyrene sulfonate, lithium polystyrene sulfonate, zinc polystyrene sulfonate, calcium polystyrene sulfonate, and/or sarin resin, hydrophobic agent is modified polysiloxane, preferably polydimethylsiloxane and its derivatives and/or polymethyl phenyl siloxane and its derivatives. Photovoltaic EVA film comprises 0.1-2 wt.% crosslinking agent, 0.1-2 wt.% auxiliary crosslinking agent, 0.5-5 wt.% polyolefin ionomer, 0.2-2 wt.% hydrophobic agent, 0.05-0.4 wt.% UV light stabilizer, 0.05-4 wt.% auxiliary antioxidant, 0.05-0.4 wt.% tackifier, 0.05-0.4 wt.% flame retardant, 0.05-0.4 wt.% antacid, and balance EVA. Photovoltaic EVA film comprises 0.1-2 wt.% tert.-butylperoxy-2-ethylhexyl carbonate, 0.1-2 wt.% triallyl isocyanurate/trimethylolpropane trimethacrylate composite, 0.5-5 wt.% ethylene-methacrylic acid copolymer metal salt, 0.2-2 wt.% modified polysiloxane, 0.05-0.4 wt.% bis(2,2,6,6-tetramethyl-4-piperidyl) sebacic acid ester, 0.05-4 wt.% tris(4-nonylphenyl)phosphite/tris(2,4-di-tert.-butylphenyl)phosphite composite, 0.05-0.4 wt.% gamma -methacryloxypropyl trimethoxysilane, 0.05-0.4 wt.% trioctyl phosphate, 0.05-0.4 wt.% calcium stearate, and balance EVA.