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Screen mesh array conducting film, solar cell and preparation method thereof

A solar cell and conductive film technology, applied in circuits, electrical components, semiconductor devices, etc., can solve the problems of no benefit to the industry and high cost of silver materials, and achieve the effect of reducing production costs, high conductivity, and reducing dosage

Inactive Publication Date: 2015-04-29
黄华松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of silver materials that needs to be invested is far higher than the return that can be earned by improving efficiency, which does not benefit the industry

Method used

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  • Screen mesh array conducting film, solar cell and preparation method thereof
  • Screen mesh array conducting film, solar cell and preparation method thereof
  • Screen mesh array conducting film, solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 1 , figure 1 It is a structural schematic diagram of Embodiment 1 of the screen array conductive film of the present invention.

[0045] In Embodiment 1, the present invention provides a wire mesh array conductive film, the wire mesh array conductive film includes an optical film 1 and a conductive metal mesh, and the conductive metal mesh is arranged on either side of the optical film 1 , the conductive metal mesh includes a horizontal metal wire 2 and a vertical metal wire 3, and the horizontal metal wire 2 and the vertical metal wire 3 both include a high-conductivity metal core, and the outer surface of the high-conductivity metal core is coated with a low melting point metal layer.

[0046] It is worth noting that, figure 1 The grid of the conductive metal mesh is rectangular. However, according to the needs of battery manufacturers or users and other reasons, the grid can also be set to be honeycomb, circular, rectangular, square, polygonal and va...

Embodiment 2

[0063] see figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 and Figure 8 , figure 2 It is a structural schematic diagram of solar cell embodiment 2 of the present invention; image 3 for figure 2 Schematic diagram of the structure of the middle conductive metal mesh in contact with the auxiliary grid line; Figure 4 for image 3 Schematic diagram of the enlarged structure of part C in middle; Figure 5 for image 3 A schematic diagram of the cross-sectional structure of A-A; Image 6 for image 3 Schematic diagram of the cross-sectional structure of B-B in the middle; Figure 7 for figure 2 Schematic diagram of the cross-sectional structure of the wire mesh array conductive film; Figure 8 for figure 2 Schematic diagram of the cross-sectional structure of a crystalline silicon cell without busbars in the middle.

[0064] In order to achieve the above object, Embodiment 2 of the present invention also provides a solar cell, which include...

Embodiment 3

[0071] see Figure 9-Figure 14 , Figure 9 It is a schematic flow chart of Embodiment 3 of the preparation method of the solar cell of the present invention; Figure 10-Figure 14 for Figure 9 The structural schematic diagram of each step of the preparation method of the solar cell shown.

[0072] In order to achieve the above object, Embodiment 3 of the present invention also provides a method for preparing a solar cell, the method comprising the following steps:

[0073] Step S10, preparing a wire mesh array conductive film (see Figure 10 );

[0074] The wire mesh array conductive film in the present invention includes an optical film 1 and a conductive metal mesh, the conductive metal mesh is arranged on either side of the optical film, the conductive metal mesh includes a horizontal metal wire and a vertical metal wire, so Both the horizontal metal wire and the vertical metal wire include a high-conductivity metal core 6 , and the outer surface of the high-conductivi...

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Abstract

The invention discloses a screen mesh array conducting film, a solar cell and a preparation method of the screen mesh array conducting film. The screen mesh array conducting film comprises an optical film and an electric conducting metal mesh, the electric conducting metal mesh is arranged on either side of the optical film, the electric conducting metal mesh comprises horizontal metal wires and longitudinal metal wires, the horizontal metal wires and the longitudinal metal wires both comprise high-conductivity metal cores, and the outer surfaces of the high-conductivity metal cores are coated with low-melting-point metal layers. Firstly, main grid lines are replaced by the electric conducting metal mesh, owing to the high-conductivity metal cores and small radical widths of the electric conducting metal mesh, the electric conducting metal mesh has the advantages that the through holes are numerous, the light shading volume is small, and the electric conductivity is high. Accordingly, in the process of solar cell manufacturing, main grid lines production using sliver paste is not needed, and the usage volume of the sliver paste is reduced; meanwhile, the screen mesh array conducting film can match with the existing production technology and procedures of a crystal silicon solar cell in a compatible mode, deserting or adding of an original technology or production equipment are not needed, and the production cost is effectively reduced by the screen mesh array conducting film.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a wire mesh array conductive film, a solar battery and a preparation method thereof. Background technique [0002] Since sunlight enters the battery from the front of the battery, the metal electrode on the front will block a part of the silicon wafer, so the light energy shining on the metal electrode cannot be converted into electrical energy. From this point of view, the thinner the grid lines of the metal electrodes, the better. However, the function of the grid lines of the metal electrodes is to conduct current. From the perspective of resistivity, the thinner the grid lines, the smaller the conductive cross-sectional area and the greater the resistance loss. To sum up, the core of battery grid design is to strike a balance between shading and conductivity. [0003] On the basis of current solar cell production technology, in order to further improve the pho...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/18
CPCH01L31/0216H01L31/0224H01L31/18Y02P70/50
Inventor 黄华松宫华姜晶
Owner 黄华松
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