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Preparation method of conventional poly-crystal secondary printing solar cell

A solar cell sheet and secondary printing technology, which is applied in printing, printing machines, rotary printing machines, etc., can solve the problems of low performance of the cell sheet, improve spectral responsivity, increase absorption rate, and improve grid line printing quality Effect

Inactive Publication Date: 2019-03-05
TONGWEI SOLAR ENERGY CHENGDU CO LID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing preparation process of crystalline silicon solar cells results in low performance of cells

Method used

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  • Preparation method of conventional poly-crystal secondary printing solar cell
  • Preparation method of conventional poly-crystal secondary printing solar cell
  • Preparation method of conventional poly-crystal secondary printing solar cell

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Embodiment Construction

[0058] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0059] The invention provides a method for preparing a conventional polycrystalline secondary printed solar cell, comprising the following steps:

[0060] A. Texturing. Use a mixed solution of HF, HNO3 and pure water to acid-etch the surface of polycrystalline silicon wafers. After acid-etching, the suede surface is microscopically worm-like. Due to the multiple reflections and refractions of incident light on the surface, the light absorption is increased and the performance is improved. The short-circuit current and conversion efficiency of the battery. Among them, the HNO3 concentration is 540-600g / L, the HF concentration is 70-90g / L, and the texturing temperature is 10°C. . In order to obtain a uniform suede surface, alcohols such as ethanol an...

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PUM

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Abstract

The invention discloses a preparation method of a conventional poly-crystal secondary printing solar cell. The preparation method comprises the following steps: A, flocking; B, diffusing; C, etching;D, annealing; E, reducing light attenuation; F, plating an anti-reflection film; and G, printing; the annealing in the step D adopts anaerobic annealing; and the printing in the step G adopts knotlessprinting.

Description

technical field [0001] The invention relates to a method for preparing solar cells from conventional polycrystalline silicon. Background technique [0002] A solar cell, also known as a photovoltaic cell, is a semiconductor device that converts the sun's light energy directly into electrical energy. Because it is a green product, does not cause environmental pollution, and is a renewable resource, solar cells are a new energy source with broad development prospects in today's energy shortage situation. [0003] The existing preparation process of crystalline silicon solar cells produces cells with low performance. Contents of the invention [0004] In view of this, the present invention provides a preparation method of conventional polycrystalline secondary printing solar cells, which adopts a new diffusion process, non-network secondary printing process, oxygen-free annealing process, and light attenuation process, which greatly improves solar energy. battery performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/068H01L31/18B41F15/36
CPCB41F15/36H01L31/022425H01L31/068H01L31/1804H01L31/1864Y02E10/547Y02P70/50
Inventor 常青扈静闫涛
Owner TONGWEI SOLAR ENERGY CHENGDU CO LID
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