Polycrystalline silicon solar cell light absorption enhancement 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 suede structure, a dielectric nano film and dielectric nanospheres which are sequentially laminated, wherein the dielectric nano film is located on aside of a suede surface of the polycrystalline silicon suede structure, the dielectric nanosphere monolayer is distributed on the surface of the dielectric nano film, the dielectric nanospheres are insensitive to an incident light angle and are capable of achieving forward scattering of sunlight over a broad spectrum to enhance battery trapping for light, the dielectric nanospheres are utilized in combination with the dielectric nano film, and the weak light trapping ability of a micron-scale suede structure technology is compensated. The light absorption enhancement structure is advantaged in that the monolayer dielectric nanospheres are simply integrated, compared with a polycrystalline silicon suede nano technology in the prior art, good compatibility is good, and polycrystalline silicon solar cell efficiency can be effectively improved.

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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