Polycrystalline silicon solar cell light absorption enhanced structure, polycrystalline silicon solar cell and preparation method thereof

Abstract

The invention relates to a polycrystalline silicon solar cell light absorption enhancement structure, a polycrystalline silicon solar cell and a preparation method thereof. The light absorption enhancement structure includes a polycrystalline silicon textured structure, a dielectric nano film and a dielectric nano ball that are sequentially stacked, wherein the dielectric nano The thin film is located on the textured side of the polysilicon textured structure, and the medium nano ball monolayer is distributed on the surface of the medium nano film. The dielectric nanospheres are not sensitive to the angle of incident light, and can forward-scatter sunlight in a wide spectral range, enhancing the light capture of the battery, and the combination of the dielectric nanospheres and the dielectric nanofilm makes up for the existing There is a disadvantage of weak light-harvesting ability of micron-scale textured structure technology. In addition, the single-layer dielectric nanosphere integration method of the present invention is simple, has good compatibility with the existing polysilicon textured technology, and can effectively improve the efficiency of polysilicon solar cells.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a polycrystalline silicon solar cell light absorption enhancement structure, a polycrystalline silicon solar cell and a preparation method thereof. Background technique [0002] As a major photovoltaic technology, crystalline silicon solar cells have an extremely important position and many extensive application scenarios, such as power supply for residential buildings, solar power stations, power supply for street lamps, self-driven displays and so on. Crystalline silicon materials are divided into monocrystalline silicon and polycrystalline silicon, among which polycrystalline silicon occupies a dominant position in the photovoltaic market due to its low manufacturing cost and high cost performance. However, due to the different crystal orientations on the surface of polycrystalline silicon cells, it is difficult to use an alkaline chemical solution etching method to achi...

AI Technical Summary

Problems solved by technology

However, on the surface of the textured battery, especially on the micron-scale textured structure of polysilicon, and there is no effective nano-enhanced technical solution under the condition of an anti-reflection film

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