A kind of preparation method of quasi-monocrystalline silicon solar cell

Abstract

The invention discloses a preparation method for a pseudo-single crystal silicon solar cell. The preparation method includes the steps: classifying pseudo-single crystal silicon slices; selecting wool making methods according to different classifications and making wool on the front surfaces of the pseudo-single crystal silicon slices; forming P diffusion layers on the front surfaces of the silicon slices and then removing PSG (phosphorus silicon glass) on the front surfaces of the silicon slices and peripheral P diffusion layers; forming anti-reflection coatings on the front surfaces of the silicon slices; forming back electrodes and aluminum back surface fields on the back surfaces of the silicon slices; and forming positive electrodes on the front surfaces of the silicon slices. The pseudo-single crystal silicon slices are more particularly classified, and then proper wool making processes are selected according to different classifications of the pseudo-single crystal silicon slices to obtain the solar cell which is uniform in appearance, narrow in efficiency distribution and high in photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing a quasi-single crystal silicon solar cell. Background technique [0002] Quasi-single crystal silicon is a product similar to single crystal silicon or even full single crystal silicon produced by polycrystalline silicon ingot technology. Quasi-single crystal silicon combines the advantages of single crystal silicon and polycrystalline silicon, and has the characteristics of less grain boundaries, low dislocation density, large output, and high efficiency. At present, the preparation technology of quasi-monocrystalline silicon wafers is relatively mature, and its application in solar cells has become a focus of attention of major research institutions and manufacturers, and some enterprises have begun mass production of quasi-monocrystalline silicon cells. [0003] Although the proportion of single crystal silicon in quasi-single crystal silicon is rel...

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Problems solved by technology

[0006] In order to solve the problem of low efficiency of solar cells obtained after quasi-monocrystalline silicon is textured in the prior art, the invention provides a method for preparing quasi-monocrystalline silicon solar cells

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