TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The synthesis of inorganic semiconductor particle and the formation of the photoactive layer result in two steps, preferably in a single step. The preparation of the inorganic semiconductor particle takes place directly in a solution or suspension of the organic semiconductor compound under micro wave irradiation and that the obtained suspension processed directly to form a photo active layer. The manufacture of the inorganic semiconductor particle is carried under the aid of surface-active material (capper). The microwave radiation produced in a wavelength of 1 m to 1 mm and a frequency of 0.3-300 GHz. Preferred Components: The inorganic semiconductor particles show a diameter of 1 nm to 1 microns, preferably 2-100 nm. The inorganic semiconductor particles are produced from metal chalcogenides. The metal chalcogenides are AB1X2, A(B1)5X9, A(B1)5X8, C1X and/or D2X3. The inorganic semiconductor particles are produced from the respective element of periodic system; metal salt and/or metallic components, or a chalcogenide compound. The inorganic semiconductor particles exist in the form of agglomerates or percolated cross-linked particle.A = Cu, Ag, Zn or Cd;B1 = In, Ga, or Al;C1 = Cu, Ag, Zn, Cd, Pb, Hg, Eu, Tm or Yb;D = Al, In, Ga, Tl, Y, La or B; andX = S, Se or Te.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic semiconductor compounds used are semiconductor polymer and/or semiconductor oligomer; or phthalocyanine and/or perylene. The semiconductor polymer and/or semiconductor oligomer are trans-polyacetylene, polypyrrole, polythiophene, polyaniline, poly-p-phenylenevinyl, poly-p-phenylene, polyfluorene, polyaromatic amine, poly(thienylen-vinylene) and/or their derivatives. EXAMPLE - Zinc sulfide was produced under microwave radiation directly into a solution of organic semiconductor polymer. Aqueous free zinc acetate and thio-acetamide mixture of toluene and pyridine was dissolved and suspended into a solution of poly-3-hexylthiophene as a semiconductor polymer. The reaction was carried out in the synthesis microwave oven. The polymer was dissolved its self, before the reaction termination of zinc sulfide nano-particle formation. The reaction mixture was first held for 20 minutes at 80degrees C under microwave radiation. The reaction mixture was held under microwave radiation for 10 minutes at 120degrees C and 30 minutes at 180degrees C to form a suspension. The suspension produced was applied as photoactive layer in the photovoltaic cell.