TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Roof Structure: The roof structure (S1), which comprises the first support and the second support, each of the first support and a second support having an insertion hole with a depth smaller than a thickness of the solar cell panel such that the solar cell panel can be inserted in it without void, the solar cell panel inserted in the insertion holes of the first and second supports, and the bonding material layer disposed in a space formed by the first and second supports and the solar cell panel. The roof structure (S1), which comprises the first support and the second support each having an insertion hole with a width wider than that of the solar cell panel and a depth smaller than a thickness of the solar cell panel formed such that the solar cell panel is insertable to be unified at left and right sides, the solar cell panel inserted in the insertion holes of the first and second supports, the bonding material layer formed between the first and second supports and the adhesive member layer filled in a space formed by the first and second supports, the solar cell panel and the bonding material layer. The roof structure (S1), which comprises the first support and the second support each having an insertion hole with a width corresponding to that of the solar cell panel, the adhesive member layer formed on the first and second supports except for a side where the insertion holes are formed, the solar cell panel formed between the adhesive member layers of the first and second supports and inserted in the insertion holes of the first and second supports and the bonding material layer formed between the first and second supports. The roof structure (S1), which comprises the first support and the second support each having an insertion hole with a depth and a width larger than a thickness and a width of the solar cell panel, the adhesive member layer coated on an entire surface of the insertion holes of the first and second supports, the solar cell panel inserted in the insertion holes of the first and second supports having the adhesive member layer and the bonding material layer formed between the first and second supports.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The bonding material layer comprises at least one polyvinyl butyrate (PVB) film and resin, ethylene vinyl acetate (EVA) sheet and resin, polyolefin, ionomer film, polyvinyl alcohol, polyvinyl acetate, poly(methyl methacrylate) (PMMA), polyacryl, polystyrene (PS), styrene-butadiene-styrene (SBS) block copolymer, styrene-isoprene-styrene (SIS) triblock copolymer, styrene-ethylene-butylene-styrene (SEBS) block copolymer, acrylonitrile-butadiene-styrene (ABS) copolymer, methyl cellulose, ethyl cellulose or butyl cellulose. The bonding material layer is a polymer substrate comprising at least one polydimethylsiloxane (PDMS), polysilazane, polysilsesquioxane (PSSQ), polysilicon, polyurethane, epoxy, synthetic rubber, natural rubber, modified elastomer, polyacryl such as poly(methyl methacrylate) (PMMA), polyolefin, acryl, urethane, modified acryl and modified urethane or their blend, copolymer or laminate having bonding layers comprising at least one epoxy, acryl, urethane, modified acryl, modified urethane, modified elastomer and silicone, formed on their both sides. The first support, the solar cell panel, the bonding material layer and the second support are sequentially laminated. The first support, the bonding material layer, the solar cell panel and the second support are sequentially laminated. An adhesive member layer is further disposed between the first and second supports. The adhesive member layer comprises at least one PDMS, polysilazane, PSSQ, silicon, polyurethane, epoxy, synthetic rubber, natural rubber, modified elastomer, PMMA, polystyrene (PS), styrene-butadiene-styrene (SBS) block copolymer, styrene-isoprene-styrene (SIS) triblock copolymer, styrene-ethylene-butylene-styrene (SEBS) block copolymer, acrylonitrile-butadiene-styrene (ABS) copolymer, methyl cellulose, ethyl cellulose and butyl cellulose. The first support, the bonding material layer, the adhesive member layer, the solar cell panel, a second adhesive member layer, a second bonding material layer and the second support are sequentially laminated. The first support, the adhesive member layer in which a solar cell panel is completely inserted and unified, the bonding material layer and the second support are sequentially laminated. A first support having an insertion hole formed in it such that a solar cell panel is insertable in it without void, the solar cell panel inserted in the insertion hole, the bonding material layer and the second support are sequentially laminated. The first support having an insertion hole with a width wider than that of the solar cell panel and a depth corresponding to a thickness of the solar cell panel, the solar cell panel inserted in the insertion hole, the bonding material layer, the adhesive member layer filled in a space formed by the first support not filled by the solar cell panel and the bonding material layer, and the second support are sequentially laminated. The first support having an insertion hole with a depth deeper than a thickness of the solar cell panel and a width corresponding to that of the solar cell panel, the solar cell panel inserted in the insertion hole, the bonding material layer, the adhesive member layer filled in a space formed by the first support not filled by the solar cell panel and the bonding material layer, and the second support are sequentially laminated. The first support having an insertion hole with a depth and a width larger than a thickness and a width of the solar cell panel, the adhesive member layer formed on an entire surface of the first support, the solar cell panel inserted in the insertion hole parallel to the first support, the bonding material layer and the second support are sequentially laminated. The first support having an insertion hole with a depth and a width larger than a thickness and a width of the solar cell panel, the adhesive member layer formed on an entire surface of the first support, the solar cell panel inserted in the insertion hole parallel to the first support, the adhesive member layer formed below them and the second support are sequentially laminated. The first support having an insertion hole in which a solar cell panel is insertable without void, the solar cell panel inserted in the insertion hole, the bonding material layer, the adhesive member layer and the second support are sequentially laminated. A protective coating layer is further formed on an outer surface of the second support. A scattering layer is formed between the solar cell panel and the second support. A scattering layer is formed on an outer surface of the second support. A low-reflection film is formed between the first support and the solar cell panel or on an outer surface of the first support.