Research On Low-cost Nanostructured Solar Cell Antireflection Film

Solar energy,as a green,clean and renewable energy source,is an important means to solve the current energy shortage problem.Solar cell is a device that converts solar energy into electric energy and is a research hotspot at home and abroad.Solar cells are difficult to be widely used because of their low efficiency and high material cost.At present,the most effective methods to improve the efficiency of solar cells include optimizing the internal structure to improve the carrier life and making the actual fabric in the cell packaging layer to reduce the reflection and improve the utilization rate of light.Based on the anti-reflection performance of micro-nano structures,this paper proposes a low-cost method to prepare two-dimensional composite grating anti-reflection coatings to improve the efficiency of solar cells,as follows:1.A technique for improving the packing density of microstructures by using a soft mold to emboss and shrink the structure is proposed.This technology can effectively increase the packing density of the microstructure,and at the same time transform the smooth microstructure into a rough microstructure with wrinkles.Experiments and theories consistently prove that the increase of the packing density of the microstructure is of great significance to the improvement of the antireflection performance of the microstructure.2.A method of combining soft mold imprinting and shrinking technology with surface treatment technology is proposed to prepare two-dimensional composite grating.Experimental tests show that the anti-reflection performance of two-dimensional composite grating is further optimized.And transfer this structure to the surface of the solar cell as an encapsulation layer,which can reduce the reflection loss on the surface of the cell and improve the photoelectric conversion efficiency of the cell and the self-cleaning ability of the cell.