Texturing technology and diffusion technology of diamond wire solar cell pieces

A technology of solar cell sheet and diffusion process, which is applied in the direction of diffusion/doping, sustainable manufacturing/processing, circuits, etc., and can solve problems such as increased cost, insignificant anti-reflection effect, and mismatching polycrystalline diamond wire texturing process, etc. , to achieve the effect of improving the finished product, good light trapping effect, and improving the fill factor

Inactive Publication Date: 2017-09-22
ZHEJIANG GUANGLONG ENERGY TECH
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Problems solved by technology

[0004] ①Conventional chemical method; this method has simple process and low cost, but its anti-reflection effect is not significant;
[0005] ② Black silicon technology; the suede structure of the black silicon technology can be flexibly controlled between nanoscale and micron, and its anti-reflection effect is very good, but the cost is increased by more than ten times when the complete process is matched.
[0006] There is a problem that the existing diffusion process does not match the polycrystalline diamond wire texturing process

Method used

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  • Texturing technology and diffusion technology of diamond wire solar cell pieces
  • Texturing technology and diffusion technology of diamond wire solar cell pieces
  • Texturing technology and diffusion technology of diamond wire solar cell pieces

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Embodiment Construction

[0081] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0082] The texturing process of the diamond wire solar cells comprises the following steps:

[0083] a. Texturing: immerse silicon wafers in a mixed solution of nitric acid, hydrofluoric acid and water, add polycrystalline additives, and perform acid texturing on silicon wafers;

[0084] b. Clean the surface of the silicon wafer with ultrapure water: use ultrapure water to clean the surface of the silicon wafer to remove the acid on the surface of the silicon wafer;

[0085] c. Alkali cleaning: immerse the silicon wafer in alkaline solution for cleaning to remove the porous silicon on the surface of the silicon wafer and neutralize the residual acid on the surface of the silicon wafer;

[0086] d. Clean the surface of the...

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Abstract

The invention provides a texturing technology and a diffusion technology of diamond wire solar cell pieces. The technical problems that the antireflection effect of an existing conventional chemical method is not obvious, the cost is increased by more than ten times after the whole set of a black silicon technology is matched and an existing diffusion technology is not matched with a texturing technology of diamond wires are solved. The texturing technology of the diamond wire solar cell pieces provided by the invention comprises the following steps: a, texturing; b, silicon wafer surface washing with ultrapure water; c, alkaline washing; d, silicon wafer surface washing with ultrapure water; e, mixed acid solution washing of hydrofluoric acid and hydrochloric acid; and f, ultrapure water washing and drying. The texturing technology has the advantage of low polycrystalline silicon reflectivity.

Description

technical field [0001] The invention relates to a texture making process and a diffusion process of a diamond wire solar battery sheet. Background technique [0002] With the development of society, non-renewable resources such as coal and oil are decreasing day by day, and finding and developing new energy sources has become an urgent issue facing mankind. Photovoltaic power generation, as one of the most potential renewable energy utilization methods, has become the main technology to replace traditional petrochemical energy and support the sustainable development of mankind. It has achieved rapid development in recent years and will occupy the world's energy resources in the near future. An important seat for consumption. [0003] In recent years, as the market has higher and higher requirements for battery conversion efficiency and consumption and cost reduction. The cost of diamond wire-cut polycrystalline solar cells is much lower than that of the traditional ingot c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0236H01L31/18C30B31/06C30B33/10
CPCC30B31/06C30B33/10H01L31/02363H01L31/02366H01L31/1804H01L31/182Y02E10/546Y02E10/547Y02P70/50
Inventor 朱金浩蒋剑波朱世杰许布陈珏荣
Owner ZHEJIANG GUANGLONG ENERGY TECH
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