NOVELTY - Multilayer thin films production involves hydrophilizing optical glass substrate by immersing in sulfuric acid solution in a ratio of 7:3 by volume, where the sulfuric acid solution is heated at 80 degrees C for 1 hour. The treated substrate is washed with deionized water and then immersed in a solution of ammonium hydroxide, hydrogen peroxide and water in a ratio of 1:1:5 by volume at 70 degrees C for 1 hour. The substrate is immersed in aqueous solution of poly(xylylidene tetrahydrothiophenium chloride) (PTHT) for 1 minute and then rinsed with deionized water.    USE - Method for producing multilayer thin films used for producing organic photoelectrochemical solar cells for generating electricity (all claimed).    ADVANTAGE - The method produces multilayer thin films that absorb significant amounts of light due to strong absorption in materials, and meet energy demands of future, which makes photovoltaic technology of growing interest.    DETAILED DESCRIPTION - Multilayer thin films production involves hydrophilizing optical glass substrate by immersing in sulfuric acid solution in a ratio of 7:3 by volume, where the sulfuric acid solution is heated at 80 degrees C for 1 hour. The treated substrate is washed with deionized water and then immersed in a solution of ammonium hydroxide, hydrogen peroxide and water in a ratio of 1:1:5 by volume at 70 degrees C for 1 hour. The substrate is immersed in aqueous solution of poly(xylylidene tetrahydrothiophenium chloride) (PTHT) for 1 minute and then rinsed with deionized water. The washed substrate is dried in nitrogen gas. A substrate layer of electrolyte anionic sodium dodecylbenzene sulfonates is deposited on the substrate by immersion for 1 minute. The substrate is washed with deionized water and then dried in nitrogen gas. A bilayer of poly-p-phenylenevinylene (PPV) precursor or sodium dodecylbenzene sulfonate is deposited by using single wall carbon nanotubes and polyethylamine. The substrate is washed with deionized water and then dried in nitrogen gas. The substrate is immersed in an aqueous solution of polyethylenimine for 1 minutes, washed with deionized water and then dried in nitrogen gas. The deposited layers of poly(xylylidene tetrahydrothiophenium chloride) and poly-p-phenylenevinylene are converted by heating into films at 110 degrees C for 1 hour in an inert nitrogen atmosphere.    DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation depicting optical absorption spectra in ultraviolet-visible region for the films. (Drawing includes non-English language text).