A method for preparing a pile, a method for preparing a stacked battery, and a stacked battery

By thinning the initial textured surface of crystalline silicon solar cells and forming a micro-textured surface, the problems of uneven reflectivity and thickness in perovskite crystalline silicon tandem cells are solved, thereby improving the photoelectric conversion efficiency of tandem cells.

CN122349271APending Publication Date: 2026-07-07HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HENGDIAN GRP DMEGC MAGNETICS CO LTD
Filing Date
2025-01-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing perovskite-silicon tandem solar cells struggle to balance reducing the surface reflectivity of crystalline silicon solar cells with minimizing the thickness inhomogeneity of perovskite solar cells, resulting in reduced tandem cell efficiency.

Method used

By thinning the initial textured surface of crystalline silicon solar cells and forming a micro-textured surface, combined with wet and dry etching processes, intermediate textured and micro-textured structures are prepared to control the texture height and the degree of depression, thereby improving the light trapping effect.

Benefits of technology

This effectively reduces the thickness inhomogeneity of perovskite solar cells, improves the reflectivity and light absorption capacity of crystalline silicon solar cells, and thus enhances the photoelectric conversion efficiency of tandem cells.

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Abstract

The present application relates to the technical field of solar cells, and discloses a method for preparing a textured surface, a method for preparing a laminated cell, and a laminated cell. The method for preparing a textured surface comprises providing a substrate; performing a first texturing process on one side surface of the substrate to form an initial textured surface structure; thinning the side surface of the initial textured surface structure away from the substrate to form an intermediate textured surface structure; and performing a second texturing process on the side surface of the intermediate textured surface structure away from the substrate to form a micro-textured surface structure on the side surface of the intermediate textured surface structure away from the substrate. The initial textured surface structure is thinned to form the intermediate textured surface structure, which reduces the height of the intermediate textured surface and reduces the degree of concave of the intermediate textured surface structure. The micro-textured surface structure is formed on the side surface of the intermediate textured surface structure away from the substrate, which further reduces the degree of concave of the intermediate textured surface structure. In addition, the micro-textured surface structure can improve light trapping effect to reduce the reflectivity of the substrate.
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