NOVELTY - The photovoltaic device comprises an assembly of photovoltaic cells, and a lamination interlayer material (300) laid between each photovoltaic cell. Each photovoltaic cell comprises two current output terminals (185, 185'), a photovoltaic junction, a current collecting bus (180, 180', 181, 181') and connection strips (190, 190', 191, 191') extending from the current collecting bus to the current output terminals, where current output terminals are arranged on single face of the photovoltaic device. The device has parallelepiped shape.    USE - The photovoltaic device is useful as a roof component or a non-transparent facade of a building and a building window (all claimed).    ADVANTAGE - The photovoltaic device prevents the possibility of short circuit between the electrodes, has improved electrical conversion efficiency, and improves the optical confinement of the solar radiation in the building.    DETAILED DESCRIPTION - The photovoltaic device comprises an assembly of photovoltaic cells, and a lamination interlayer material (300) laid between each photovoltaic cell. Each photovoltaic cell comprises two current output terminals (185, 185'), a photovoltaic junction, a current collecting bus (180, 180', 181, 181') and connection strips (190, 190', 191, 191') extending from the current collecting bus to the current output terminals, where current output terminals are arranged on single face of the photovoltaic device. The device has parallelepiped shape. The current output terminals are arranged on the face above or below the parallelepiped, and wired and aligned near the opposite side of the device. The current output terminals are of made of contacts at the ends of the connection bands. The photovoltaic cells comprise a front photovoltaic cell, an intermediate photovoltaic cell, a rear photovoltaic cell, two holes (195, 195') for passing the extensions obtained from photovoltaic cells and optionally two openings for the passage of current output terminals of the intermediate photovoltaic cell. The rear photovoltaic cell comprises a light reflecting material layer. The two electrodes are constituted of a transparent conductive oxide present on each side of the junction. The current output terminals are grouped together in a junction box by forming a first group constituted of positive current output terminals and by forming a second group constituted of the negative current output terminals. INDEPENDENT CLAIMS are included for:    (1) a photovoltaic assembly; and    (2) a process for fabrication of a photovoltaic device.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an electrical cable of a photovoltaic device.    Current collection buses (180, 180', 181, 181')    Current output terminals (185, 185')    Connection strips (190, 190', 191, 191')    Extension holes (195, 195')    Lamination interlayer material. (300)