NOVELTY - The device has a first electrically conductive layer comprising a photo-sensitized electrode. A photoelectrochemical layer comprising metal-oxide particles is dispersed in surfactant. A second electrically conductive layer comprises counter-electrode, and is provided with conductive elements. First asphaltene fraction is dissolved in 75:25 volume-to-volume n-pentane to toluene, second asphaltene fraction is dissolved in 85:15 volume-to-volume n-pentane to toluene and third asphaltene fraction is dissolved in 90:10 volume-to-volume n-pentane to toluene.    USE - Asphaltene based photovoltaic device for making a photovoltaic cell i.e. organic dye-sensitized solar cell.    ADVANTAGE - The device uses copper indium sulfide for improving conductive properties of the asphaltenes due to synergistic effect between the asphaltenes and the catalyst. The device improves energy conversion efficiency to correlate effect of different asphaltene portions, thus providing significant improvement of solar cell parameters by minimizing series resistance and improving photo current and open circuit voltage. The device improves adhesion of the titanium dioxide coating to trichloropropane and provides a larger contact area and more effective electron transfer. The device allows UV-Ozone treatment for applying synthesized porous nano-particulate films at room temperature, so that remarkable improvement of photo-conversion efficiency is obtained. The device improves efficiency in short circuit current and open circuit voltage such that asphaltene absorption is increased, thus eliminating organic contamination for higher photon capture and higher electron injection.    DETAILED DESCRIPTION - The surfactant is selected from a group consisting of triton (RTM: surfactant material), alkyl polyoxides, alkylphenols, alkyl polyglucosides, fatty alcohols, polysorbates and other non-ionic surfactants. The electrically conductive layers are made of metal or platinum coated indium-tin oxide glass. The conductive elements are made of carbon, graphite, soot and carbon allotropes. The electrically conductive layers are formed of flexible metal e.g. copper, nickel, iron and cobalt, and platinum coated indium-tin oxide glass. The sulfide is selected from copper indium sulfide, gallium diselenide and indium gallium sulfide. INDEPENDENT CLAIMS are also included for the following:    (1) a method for making a photovoltaic device    (2) a photovoltaic roadway.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a photovoltaic cell made with asphaltene solution.    Order of magnitude (2)    ITO glasses (4, 6)    Graphite coating (8)    Titanium dioxide coating (10)