Light conversion film capable of improving efficiency of silicon solar cell and preparation and application thereof

Abstract

The invention discloses a light conversion film capable of improving the efficiency of a silicon solar cell and preparation and application thereof. The light conversion film is made of fluorescent powder and transparent polymer and is provided with a zigzag surface, the height of the minimum sawtooth in the zigzag surface is larger than 0.5 mm, the included angle between adjacent inclined planes in the sawteeth is smaller than or equal to 60 degrees, and the included angle between the inclined planes and the horizontal plane is larger than or equal to 60 degrees or smaller than or equal to 120 degrees. The preparation method comprises: uniformly stirring the fluorescent powder and the transparent polymer after vacuumizing to obtain a rubber powder mixture; and preparing a mold and a sheet with a zigzag structure on the surface by using a transparent film, pouring the rubber powder mixture into the mold, pre-drying, putting the sheet on the semi-solidified rubber powder mixture, the zigzag structure facing the semi-solidified mixture, pressing, shaping and drying to prepare the light conversion film capable of improving the efficiency of the silicon solar cell. The light conversion film inhibits reflection light in the film from emitting through total reflection and a zigzag structure, is used for a silicon-based solar cell, and improves the utilization rate of solar energy.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials and relates to a light conversion film, in particular to a light conversion film capable of improving the photoelectric conversion rate of a silicon solar cell; the invention also relates to a preparation method and application of the light conversion film. Background technique [0002] Solar energy is considered to be one of the most important energy sources in the 21st century. It has incomparable advantages over traditional fossil energy such as coal and oil. Solar cells can convert solar energy into electrical energy, which is a long-term sustainable source generation method with green and sustainable characteristics. However, the energy utilization rate of existing mainstream silicon-based solar cells on the market is low, and the photoelectric conversion rate is about 20%. The main reasons for the low photoelectric conversion efficiency of silicon solar cells are: the poor sp...

AI Technical Summary

Problems solved by technology

This method has many disadvantages: the combination efficiency of phosphor powder and solar cells is unstable, the improvement of photoelectric conversion efficiency of solar cells is extremely low, the energy utilization efficiency of light sources is low, and it is not suitable for industrial mass production, etc.

Although this method can overcome the lower spectral response in the short-wave region and be more directly applied to the surface of solar cells, its biggest disadvantage is that because short-wavelength light is easier to reflect, a considerable part of short-wavelength photons are reflected into the air without being absorbed. The cell absorbs, thus resulting in a lower photoelectric conversion

In addition, the polymers commonly used in the lower transfer layer of phosphors, such as PDMS, are expensive, not suitable for mass production, and have disadvantages such as relatively small refractive index resulting in more outgoing light.

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