Crystalline silicon solar cell capable of realizing double-side light entrance and preparation method therefor

Abstract

A crystalline silicon solar cell capable of realizing double-side light entrance and a preparation method therefor are disclosed. The crystalline silicon solar cell comprises a metal grid line I, a transparent conductive oxide antireflection conductive layer, a doped silicon based thin film emitting electrode layer, an intrinsic silicon based thin film passivating layer, a crystal silicon wafer, a doped crystalline silicon thin film back surface field layer, a passivating antireflection layer and a metal grid line II. The preparation method comprises the steps of cleaning and texturing firstly, then preparing the doped crystalline silicon thin film back surface field layer, the passivating antireflection layer and the metal grid line II in sequence; then cleaning the surface, of the crystal silicon wafer, where the emitting electrode is positioned, then preparing the intrinsic silicon based thin film passivating layer, the doped silicon based thin film emitting electrode layer, the transparent conductive oxide antireflection conductive layer and the metal grid line I in sequence. The crystalline silicon solar cell has the advantages of capability of realizing double-side light entrance, high open-circuit voltage and good low light effect; the series resistance of the solar cell is further reduced, the consumption of valuable raw materials is reduced, and the cost is reduced; and in addition, the preparation method is suitable for large-scale production, capable of reducing the cost of the production equipment, and is expected to improve the stability and the yield of the products.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to the structure and preparation method of solar cells. Background technique [0002] In the field of solar cells, it is recognized that the solar cell technology that can replace p-type diffused crystalline silicon solar cells and become the mainstream in the market is based on n-type crystalline silicon wafers. The most potential is heterogeneous crystalline silicon solar cell technology. The preparation technology represented by Japan's Panasonic's HIT, which is currently the mainstream technology of this type of solar cell, has the advantages of high open circuit voltage, double-sided light input, good weak light effect, and no PID effect. There are still many problems to be overcome for large-scale popularization. For example: the performance of the product still needs to be improved, especially in terms of series resistance; the raw material cost of the product is too high...

AI Technical Summary

Problems solved by technology

For example: the performance of the product still needs to be improved, especially in terms of series resistance; the raw material cost of the product is too high, especially indium tin oxide as a transparent conductive oxide material and silver as the main material of the gate line; the price of the entire production line is too high ; The stability and yield rate of mass production still need to be considered; etc.

These problems have led to the fact that the technology has not yet been widely used

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