NOVELTY - The member has a photovoltaic device with a photovoltaic semiconductor material body (24) for generating electrical current based on absorbed incident photons. The photovoltaic device comprises a substrate (16) for supporting the photovoltaic semiconductor material body at a first face. A resilient foamed adhesive body (18) is supported on a second face of the substrate to bond the photovoltaic device to a support member, while accommodating differential thermal expansion of the device and the support member, where the second face is opposite to the first face.    USE - Adhesively affixable power generating photovoltaic member for use with a support member e.g. building structure such as building panel and wall structure, and roofing membrane (all claimed).    ADVANTAGE - The resilient foamed adhesive body is supported on the opposite face of the substrate to bond the photovoltaic device to the support member, while accommodating differential thermal expansion of the device and the support member, thus preventing delamination and other stress-related damage to a photovoltaic installation. The foamed adhesive body has a void volume in the range of 40-50 percentage, thus enhancing the resilience and elongation of the adhesive under stress, and hence enabling the foamed adhesive to accommodate differences in thermal expansion and contraction of the photovoltaic device and the support member to which the device is bonded. The foamed adhesive is made of lesser amount of adhesive material, thus enabling reduction in weight of adhesive material without decreasing area of contact between the adhesive and the support member. The adhesive adopts a mixed open-cell/closed-cell structure, thus enabling better control of elasticity and moisture resistance of the adhesive, by controlling ratio of closed cells to open cells in the adhesive.    DETAILED DESCRIPTION - The foamed adhesive is contact adhesive, curable adhesive or hot melt adhesive, and has closed cellular structure. The foamed structure of the adhesive is provided by a set of gas bubbles comprising gas selected from a group consisting of air, nitrogen, argon, helium, and fluorocarbon. The substrate is made of metal, and includes a layer of encapsulant material. An INDEPENDENT CLAIM is also included for a method for affixing a photovoltaic device to a support member.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a portion of an adhesively affixable photovoltaic member.    Substrate (16)    Resilient foamed adhesive body (18)    Portion of photovoltaic member (22)    Photovoltaic semiconductor material bodies (24, 26)    Encapsulant material (28)