TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic semiconductor layer comprises a combination several substances suitable for the active layer of solar cells. The combination of the substances comprise phenyl-C61-butyric acid methyl ester, poly (3-hexylthiophene), poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene, poly(2-methoxy-5-(3,7-dimethyloctyloxy))-1,4-phenylenevinylene, poly(5,7-di-2-thienyl-2,3-bis(3,5-di(2-ethylhexyloxy)phenyl)-thieno(3,4-b) pyrazine), poly(N-9''-hepta-decanyl-2,7-carbazole-alt-5, 5-(4', 7'-di-2-thienyl-2', 1', 3'-benzothiadiazole)), poly(4, 8-bis-substituted-benzo(1, 2-b:4, 5-b')dithiophenes-2, 6-diyl-alt-4-substituted-thieno(3,4-b)thiophene-2 ,6-diyl), poly(4,8-bis(2-ethylhexyloxy)-benzo(1, 2-b:4, 5-b')dithiophenes-2,6-diyl-alt-(4-octanoyl-5-fluoro-thieno(3,4-b)thiophene-2-carboxylate)-2,6-diyl), poly((4,8-bis ((2-ethylhexyl) oxy)-benzo(1, 2-b:4, 5-b') dithiophenes-2, 6-diyl)(3-fluoro-2-((2-ethylhexyl)carbonyl)thieno(3,4-b)thiophenediyl)), preferably from the combination of poly(3-hexylthiophene) and phenyl-C61-butyric acid methyl ester and poly(2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta(2,1-b, 3 ,4-b')dithiophene)-alt-4,7-(2,1,3-benzothiadiazole) and poly (2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene). The laser beam source exhibits a wavelength of 532 nm, and comprises a flat-top laser source or a Gaussian laser source. At least one flat-top laser source comprises a cylindrical lens, a scanner, and the multi-layer material with at least one organic semiconductor layer. At least one Gaussian laser source comprises a homogenizer (7), a cylindrical lens, a scanner, and the multi-layer material having at least one organic semiconductor layer. The beam guidance and shaping at any point, comprises additionally at least one mirror, focusing optics, and combinations of lenses (3) of different shapes and/or a scanner of f-theta lens. The multi-layer material with at least one organic semiconductor layer is mounted and/or fixed on rollers or a movable work table. The multi-layer material with at least one organic semiconductor layer is arranged in a closed chamber with inert gas, reduced pressure or vacuum, and has glass or polymer transparent for the laser radiation in an optical path through an optical window, which is protected in the chamber interior by an additional upstream or immediately adjacent structure made of a glass sheet, polymer sheet, metal plate and/or wheels mounted on a polymer film.