Abstract: A solar cell device of improved efficiency consists of a photovoltaic solar cell and an efficiency-improving antireflective nanocoating film that is applied on the solar cell and interacts with the photovoltaic process of the cell. The coating film has a thickness ranging from 100 nm to 100 ?m, and comprises a dielectric material that contains metal nanoparticles having dimensions from 4.5 to 10 nm and concentration ranging from 1 to 5%. The effect of improved efficiency is presumably obtained due to organization of nanoparticles into specific clusters. The method of manufacturing the solar-cell device of the invention comprises preparation of the polymer solution that contains uniformly dispersed metal nanoparticles of silver, gold, or another diamagnetic metal and forming the aforementioned coating film by heat-treating and drying the applied solution under specific conditions.

Abstract: An antireflective coating applied onto a substrate in the form of at least one layer of nanoparticles arranged on the aforementioned substrate at equal distances from each other in accordance with a specific nanostructure. The nanoparticles are made from a material that under effect of incident light generates between the neighboring particles optical resonance interaction with a frequency that belongs to a visible optical range. The interaction between the nanoparticles reduces reflection of the incident light. The nanoparticles have a radius in the range of 10 to 100 nm and a pitch between the adjacent particles that ranges between 1.5 diameters to several diameters.