NOVELTY - The photovoltaic cell for converting solar energy into an electrical energy, comprises a silicon chip set for carrying an enhanced spectrum conversion film (20), which is made in the form of a thin-film polymer. The thin-film polymer comprises a hyperdispersant inorganic fluorescent powder (21) disposed in contact with a surface of the silicon chip set to enhance absorption of a first specific waveband of natural light and to radiate the absorbed first specific band of natural light to a second specific waveband. A wavelength of the second waveband is 530-610 nm.    USE - The photovoltaic cell is useful for converting solar energy into electrical energy.    ADVANTAGE - The photovoltaic cell has enhanced absorption and working coefficients, improves monocrystal silicon chips conversion efficiency at the higher energy band (380-550 nm) thus improving the conversion efficiency of the photovoltaic cell, and is inexpensive.    DETAILED DESCRIPTION - The photovoltaic cell for converting solar energy into an electrical energy, comprises a silicon chip set for carrying an enhanced spectrum conversion film (20), which is made in the form of a thin-film polymer. The thin-film polymer comprises a hyperdispersant inorganic fluorescent powder (21) disposed in contact with a surface of the silicon chip set to enhance absorption of a first specific waveband of natural light and to radiate the absorbed first specific band of natural light to a second specific waveband. A wavelength of the second waveband is 530-610 nm. The spectrum conversion film shows a color of yellow orange. A light absorption of the spectrum conversion film at 300-520 nm is greater than 60%. A quantum radiance of the spectrum conversion film is 75-96%, and is increased subject to optimization of concentration in the film of 0.1-0.5 mm. A reflective rate of the spectrum conversion film relative to the total natural light received by the photovoltaic cell is 4-6%. The fluorescent powder particles have garnet crystal architecture. INDEPENDENT CLAIMS are included for:    (1) an enhanced spectrum conversion film made in the form of a thin-film polymer; and    (2) a fluorescent powder preparation method.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a structure of a photovoltaic cell.    P-type monocrystal silicon chip (1)    Spectrum conversion film (20)    Inorganic fluorescent powder. (21)