TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The solvent additionally serves as a stabilizer and/or at least one separate stabilizer is added to the solvent, preferably based on the stabilizer function of the solvent and/or based on the separate stabilizer the CZTS-semiconductor-nanocrystallite forms an organic coat. A mixture of the solvent, separate stabilizer, copper, zinc and tin compounds, selenium-containing compounds and/or sulfur-containing compounds is mixed (preferably stirred) for a predetermined temperature, where the mixture is preferably mixed at a given temperature, which is dependent on the used solvent. The synthesis of the CZTS-semiconductor-nanocrystallite is carried out at -10 degrees C to 250 degrees C. The concentration of the CZTS-semiconductor-nanocrystallite in the solvent is increased by concentrating (preferably centrifuging) and/or the CZTS-semiconductor-nanocrystallite is purified by washing, preferably using absolute ethanol. The CZTS-semiconductor-nanocrystallite is transferred by dispersion in usual dispersion agents, preferably ethanol or isopropanol, to a preferably printable, colloidal suspension, where the dispersion is carried out for preparing the colloidal suspension preferably under the addition of additives. Preferred Components: Individual or a mixture of water, acid, base, mono-, di- or poly-alcohol, mono-, di- or poly-thiol, mono-, di- or poly-amine, ether, ketone and/or at least one compound from a combination of thiol, alcohol, amine, ether and/or ketofunction is used as the solvent and/or as the separate stabilizer. The anions of copper, zinc and tin compounds include acetate, chloride, nitrate, sulfate and/or alcoholate, the sulfur-containing compounds include hexamethyl disilathiane, thiourea and/or hydrogen sulfide gas, and/or the selenium-containing compounds include selenium sulfide, selenium tetrachloride, selenium urea, sodium selenosulfate, potassium selenocyanate and/or hydrogen selenide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent and/or separate stabilizer comprises an organic compound alone or as a mixture from one or more carboxyl-, hydroxyl-, thiol-, alcohol-, amine-, ether- and/or ketofunction and/or any combination of the above organic compounds. Preferred Composition: The colloidal suspension and/or the CZTS-semiconductor-nanocrystallites during manufacturing a semiconductor, is/are applied by an application process on a carrier material. The application process includes printing process, dip-coating, and/or streaming, where the printing process is carried out preferably by mask-free manner and preferably formed as ink jet and/or aerosol printing process. The application process is carried out simultaneously during the structuring of the applied semiconductor layer. The semiconductor layer is sintered by sintering process, preferably by focused laser treatment and/or thermal treatment, where the sintering process is carried out under inert gas (preferably argon and/or nitrogen) and/or reduced atmosphere (preferably hydrogen) at 300-900 degrees C (preferably 450 degrees C). The crystal structure and/or crystal composition of the CZTS-semiconductor material of the semiconductor layer is verified by X-ray diffraction. EXAMPLE - A solvent (preferably water-free ethanol) was added into a container, where the solvent acted as a self-stabilizer or a separate stabilizer (preferably N-ethyl diisopropylamine) was added. The solvent was stirred with the stabilizer for short period of time. The stabilizer formed an organic coat around the nanoparticle. Copper(I) acetate, zinc(II) acetate and tin(IV) acetate compounds were added to the solvent. The mixture was subsequently mixed and heated in oil bath at 60 degrees C. The mixture was stirred for 1 hour, followed by the addition of ethylene glycol and stirred for one hour to obtain first variant of dicopper-zinc-tin-tetrasulfide and/or tetraselenide (Cu2ZnSnSe4). The mixture was cooled to room temperature, followed by the sulfidation step by addition of hexamethyldisilathiane. The mixture was stirred for 2 hours to obtain dicopper-zinc-tin tetrasulfide semiconductor nanocrystalline.