Preparation method of conventional single-crystal secondary-printed solar battery piece

A solar cell, secondary printing technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem of low cell performance, and achieve the effect of improving spectral responsivity, improving conversion efficiency, and large output

Inactive Publication Date: 2019-04-12
TONGWEI SOLAR ENERGY CHENGDU CO LID
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing preparation process of crystalline

Method used

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  • Preparation method of conventional single-crystal secondary-printed solar battery piece
  • Preparation method of conventional single-crystal secondary-printed solar battery piece
  • Preparation method of conventional single-crystal secondary-printed solar battery piece

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Embodiment Construction

[0048] 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.

[0049] The steps of the present invention include:

[0050] A. Texturing. The preparation of the monocrystalline silicon texture is to use the anisotropic etching of silicon to form millions of tetrahedral pyramids, that is, pyramid structures, on the silicon surface per square centimeter. Due to the multiple reflection and refraction of the incident light on the surface, the absorption of light is increased, and the short-circuit current and conversion efficiency of the battery are improved. The anisotropic etching solution for silicon usually uses a hot alkaline solution, and the available alkalis include sodium hydroxide, potassium hydroxide, lithium hydroxide, and ethylenediamine. Most of the cheap dilute sodium hydroxide solution with a concent...

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Abstract

The invention discloses a preparation method of a conventional single-crystal secondary-printed solar battery piece. The preparation method comprises the following steps of A, texturing; B, diffusion;C, etching; D, annealing; E, plating of an antireflection film; and F, printing, wherein annealing in the step D adopts oxygen-free annealing; and a non-net-knot secondary printing mode is adopted for printing in the step F.

Description

technical field [0001] The invention relates to a method for preparing solar cells from conventional monocrystalline 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 method for preparing conventional monocrystalline secondary printed solar cells, which greatly improves the performance of solar cells by adopting a new diffusion process, secondary printing process and oxygen-free annealing process. [0005] In order to solve the above technic...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/068H01L31/0224
CPCH01L31/022433H01L31/068H01L31/1804H01L31/1864Y02E10/547Y02P70/50
Inventor 吴俊旻扈静薛娟
Owner TONGWEI SOLAR ENERGY CHENGDU CO LID
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