PRINTER FOR SUCCESSIVE DEPOSITION OF ULTRA-THIN LAYERS OF DIFFERENT PHYSICAL-CHEMICAL PROPERTIES

摘要

The invention relates to a printer for successive deposition of ultra-thin layers, with thicknesses ranging between 0.5...2 μm, having different properties of composition, viscosity, content and nanoparticle size, the printer being meant to be used for manufacturing photovoltaic solar cells based on perovskite-halides. According to the invention, the printer may provide the ultra-thin layers by applying any of the three specific deposition techniques, namely: screen printing, doctor blade and wire bar, to deposit successive layers of different types of materials with various viscosities as liquid or paste, which may be kept at a temperature of up to 150°C, depending on the material characteristics, the printer having a modular structure with three basic modules: the carriage module subassembly (1), the vertical module subassembly (2) and the oven module subassembly (3), and two other modules used depending on the deposition technique to be applied, namely: the rubber blade support module subassembly (5) for the screen printing and doctor blade techniques, and the bar support module subassembly (4) for wire bar technique, the printer also comprising an atomizing system with two types of tanks, depending on the viscosity of the material to be deposited, namely: a cylindrical tank for the liquid materials and a parallelepipedal tank for the materials of high viscosity, the regulation of the compressed-air flow used for entraining the liquid material through the atomization nozzle orifice being performed depending on the viscosity of the material, as well.