TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The adhesion provision component (D) is vinyl trimethoxysilane, vinyl triethoxysilane, ( gamma )-glycidoxy propyltrimethoxysilane, ( gamma )-glycidoxy propyl triethoxysilane, ( gamma )-acryloxypropyl trimethoxysilane or ( gamma )-methacryloxypropyl trimethoxysilane.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The curable silicone materials (a) and (b) contain 100 parts mass organopolysiloxane (A) containing alkenyl group coupled with 2 or more silicon atoms in 1 molecule and is of formula: RaR'bSiO(4-a-b)/2 (I), organo-hydrogen-polysiloxane (B) containing hydrogen atom coupled with 2 or more silicon atom in a molecule in an amount of 0.4-2.5 times of mole of hydrogen atoms coupled with silicon atom with respect to 1 mol silicon atom-bonded alkenyl groups of organopolysiloxane (A), and addition reaction catalyst (C). The organo-hydrogen-polysiloxane (B) is organo-hydrogenpoly siloxane containing epoxy group and/or alkoxy group in portion of one or more molecule. The curable silicone materials (a) and (b) further contain 0.5-20 parts mass adhesion provision components (D) with respect to 100 parts mass organopolysiloxane (A).R=alkyl;R'=1-10C optionally substituted monovalent hydrocarbyl which does not have aliphatic unsaturated bond;a=more than 0 and 2 or less;b=more than 0 and less than 3;andor a+b=more than 0 and 3 or less.Preferred Process: The injecting of curable silicone material (b) between two glass plates is carried out by a vacuum casting. The arranging of the photovoltaic cell string on the silicone cured film formation surface of one plate glass is carried out by contacting photovoltaic cell with some spacer, adhering to the silicone cured film, and performing positioning and fixation of the photovoltaic cell. The spacer has adhesiveness with respect to silicone cured film. The photovoltaic cell is formed using the silicon substrate. The photovoltaic cell is double sided light reception-type photovoltaic cell.