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Solar cell preparation method

A solar cell and battery technology, applied in the manufacture of circuits, electrical components, final products, etc., to achieve the effects of easy ohmic contact, reduced area resistance, and improved power generation efficiency

Active Publication Date: 2017-05-31
YINGLI ENERGY CHINA
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Problems solved by technology

[0016] The technical problem to be solved by the present invention is to provide a method for preparing a solar cell, which avoids the influence of the bypass diode on the light-receiving area of ​​the solar cell and the module, and at the same time solves the problem of the hot spot effect of the solar cell, improves power generation efficiency, and reduces power generation loss. Extend component operating life

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Embodiment Construction

[0059] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] see Figure 5 , Figure 6 , first, the principle of the method for preparing a solar cell provided by the embodiment of the present invention is described as follows:

[0061] Battery positive electrode 1: the positive pole of the main battery;

[0062] The first electrode 2 on the back: according to different applications, the electrical principle is different; when the battery is applied to double-sided glass components, it is the positive electrode of the secondary battery; when the battery is applied to single-sided glass components, it is the positive electrode of the protection diode;

[0063] The second electrode 3 on the back side: the common output electrode of the negative pole of the main battery and the negative pole of the secondary battery or the negative pole of the protection diode.

[0064] The preparation m...

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Abstract

The invention discloses a solar cell preparation method, and belongs to the technical field of solar cell preparation. The method mainly comprises the following steps that cleaning is conducted; texturing is conducted; boron diffusion is conducted; regional ion implantation is conducted, wherein the back is divided into a comb-shaped N type region and a comb-shaped P type region; annealing is conducted; laser etching is conducted, wherein PN junctions around a silicon wafer are removed, so that PN junctions of the front and the back are separated, the front adopts the main cell PN junction, and the back adopts the secondary cell or protection diode PN junction; by means of PECVD, the two sides of the silicon wafer are coated with films, and anti-reflection films are formed; silk-screen printing is conducted on the front and the back of the silicon wafer, and a front electrode, a first back electrode and a second back electrode are formed through sintering. Accordingly, the influence caused by a bypass diode on the solar cell and component sunlight area is avoided; meanwhile, the solar cell shot spot effect problem can be solved, the generating efficiency is improved, the power generation loss is lowered, and the component operating life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of solar cell preparation, and in particular relates to a method for preparing a solar cell. Background technique [0002] Photovoltaic modules are an important part of photovoltaic systems, and solar cells are the core of photovoltaic modules. The structural characteristics, stability, reliability, and differentiation of solar cells directly affect the working status of photovoltaic modules and the design and application of different occasions, and determine the packaging process and technical performance of modules. [0003] The characteristics of traditional photovoltaic modules produced at home and abroad are: (1) photovoltaic module products are composed of battery strings, busbars, packaging materials, and junction boxes; (2) busbars connect battery strings and then connect with junction boxes ; (3) Encapsulation materials include glass, backplane, EVA, aluminum profile frame, silica gel or adhesive t...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCH01L31/18Y02P70/50
Inventor 高艳杰张雷王亮王静孙晓娟张建旗田涛高航刘莹任秀强
Owner YINGLI ENERGY CHINA
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