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N-type solar cell front fine grid slurry and preparation method thereof

A technology of solar cells and fine grids, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of solar cell compounding increase, increase production cost, increase process equipment, etc., to achieve The effect of reducing production costs, reducing corrosion, and simplifying process steps

Active Publication Date: 2019-11-22
NANTONG T SUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When aluminum-doped silver paste is used on the front side, it can improve solderability, but the presence of silver-aluminum peaks will increase the recombination of solar cells. If aluminum paste is used, it will cause grid failure because aluminum is more active and has a lower melting point. The line is not smooth, aluminum beads or aluminum packets appear
In addition, the process of printing fine grids in the prior art is mostly grooved first and then printed, such as Chinese patents CN201510207047.X and CN105742378A. For laser grooving, it is necessary to increase the process equipment and increase the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The preparation method of the high-activity glass powder in the present application is not particularly limited, and can be any one known to those skilled in the art, such as completely melting the mixed inorganic raw materials into molten glass in a high-temperature furnace, and then pouring the molten glass into a roller The rolling mill makes glass flakes, and then puts the glass flakes into a ball mill to pulverize them into glass powder.

[0028] In some preferred embodiments, the median particle size of the high-activity glass powder is 50-100 nanometers; more preferably, the median particle size of the high-activity glass powder is 80 nanometers.

[0029] The applicant found that, compared with ordinary glass powder, the use of high-activity glass powder can react with the anti-reflection layer, and it is not necessary to use the conventional process of opening holes on the surface of the anti-reflection layer before printing, avoiding the damage caused by opening...

Embodiment 1

[0064] Embodiment 1 provides a front fine grid paste for N-type solar cells. The preparation raw materials include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder and 18 parts of organic components in parts by weight.

[0065] In parts by weight, the raw materials for the preparation of the highly active glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, 6 parts of silicon dioxide share.

[0066] The silicon content in the aluminum-silicon alloy powder is 15wt%.

[0067] The median particle size of the highly active glass powder is 80 nanometers, the median particle size of the silicon powder is 80 nanometers, and the median particle size of the aluminum-silicon alloy powder is 2 microns.

[0068] In parts by weight, the raw materials for the preparation of the organic component include 4...

Embodiment 2

[0080] Example 2 provides a front fine grid paste for N-type solar cells. The preparation raw materials include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components in parts by weight.

[0081] In parts by weight, the raw materials for the preparation of the high-activity glass powder include 5 parts of boric acid, 45 parts of lead oxide, 2 parts of zinc oxide, 5 parts of cesium carbonate and 1 part of silicon dioxide.

[0082] The silicon content in the aluminum-silicon alloy powder is 15wt%.

[0083] The median particle size of the highly active glass powder is 80 nanometers, the median particle size of the silicon powder is 80 nanometers, and the median particle size of the aluminum-silicon alloy powder is 2 microns.

[0084] In parts by weight, the raw materials for the preparation of the organic component include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic ag...

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Abstract

The invention discloses N-type solar cell front fine grid slurry which comprises the following preparation raw materials in parts by weight: 1-5 parts of high-activity glass powder, 1-5 parts of silicon powder, 75-79 parts of aluminum-silicon alloy powder and 15-20 parts of organic components. According to the N-type solar cell front fine grid slurry and the preparation method thereof provided bythe invention, the aluminum paste is used for replacing aluminum-doped silver paste in the prior art; the production cost of the N-type solar cell is reduced, the slotting process before printing is omitted due to the high-activity glass powder contained in the aluminum paste, the process steps are simplified, a passivation layer cannot be damaged, and the electrical performance of the solar cellis improved.

Description

technical field [0001] The invention relates to the field of polymer-based conductive materials, in particular to an N-type solar cell front fine grid paste and a preparation method thereof. Background technique [0002] With the improvement of people's awareness of environmental protection, the development and utilization of clean energy are developing faster and faster. Solar energy is inexhaustible and inexhaustible, making solar cells the focus of research and development in the field of new energy. At present, solar cells occupying a large number of markets are mainly P-type solar cells, but N-type solar cells have the advantages of high conversion rate, low light-induced degradation, good stability, and high cost performance, and have gradually attracted attention in the market. At the same time, N-type solar cells are also With the advantages of double-sided power generation, suitable for building integration and vertical installation, the application in the market is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B1/16H01B13/00H01L31/0224C03C12/00
CPCH01B1/22H01B1/16H01B13/00H01L31/022425C03C12/00C03C3/0745C03C8/10C03C8/18C03C8/16H01B1/08H01B1/12H01L31/18
Inventor 朱鹏刘媛刘梦雪王叶青
Owner NANTONG T SUN NEW ENERGY CO LTD
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