TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The UV hardening-type resin includes polyol, multifunctional isocyanate, nitro carbon monoxide (NCO) activator, methacrylate group, polypropylene glycol, polycarbonatepolyol, polytetramethylene glycol and polycaprolactone diol; and comprises hydroxy ethyl acrylate (HEA), hydroxyproylacrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2-HEMA). The methacrylate group reacts acrylate compound and hydroxy radical. The polyurethane methacrylate has a range of 3-20, preferably 4-10. The NCO activator comprises dibutyltin dilaurate, zirconium octoate, dibutyltin bis(o-phenylphenate) and dibutyltin-s,s-dibutyldithio-carbonate. The molecular weight of the polycarbonatepolyol, polytetramethylene glycol and polyol is 1000-4000. The multifunctional isocyanate is diisocyanate or diisocyanate trimer form. The diisocyanate trimer comprises hexamethylene diisocyanate, 4,4-diisocyanate, 1,4-tetramethylene diisocyanate, 1,10-deca-methylene-diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, 1,5-naphthalene diisocyanate, 4-methoxy-1,3-phenylene diisocyanate, 4-chloro-1,3-phenylene diisocyanate, 2,4-dimethyl-1,3-phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate, methylene-bis(4-phenylisocyanate), 1,3-phenylene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate. The molar ratio of the acrylate compound and hydroxy radical is 1:2:2-1:2:4 and 1:2:2-4:5:2. The molecular weight of the polyurethane methacrylate is 1500-40000 in range. The UV curable resin composition comprises UV ray reactive monomer. The UV curable resin composition includes premise composition (100 parts by weight (pbw)), the UV hardening-type resin (30-68 pbw), the UV ray reactive monomer (30-68 pbw), and the photopolymerization initiator (0.5-2 pbw). The solar cell is placed in the lower substrate. A lower part of the UV curable resin layer is placed between the solar cell and lower substrate. The protection cover layer is formed in an outside of the UV curable resin layer. The protection cover layer has a thickness of 50-300. An outside of the protection cover layer is hard-coated. The UV curable resin layer has: a thickness of 0.5-2 mm in range; an optical wavelength region of 330-800 nm; and an optical transmittance rate of 92%.