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Low-temperature silver paste for HJT solar cell with wide welding windows and preparation method of low-temperature silver paste

A technology of solar cells and welding windows, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of low electrical performance, high resistance, and low silver content, and achieve low-temperature paste Low material cost, simple process, good for large-scale promotion

Pending Publication Date: 2022-07-15
四川东树新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its silver content is low, and the resistance will be too high during use, resulting in low electrical properties

Method used

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  • Low-temperature silver paste for HJT solar cell with wide welding windows and preparation method of low-temperature silver paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A low-temperature silver paste for HJT solar cells with a wide welding window, comprising the following materials in parts by weight: 34.4 parts of flake silver powder with an average particle size of 1.37 μm, 51.6 parts of spherical silver powder with an average particle size of 0.75 μm, silver-X Alloy powder 3 parts, solvent diethylene glycol butyl ether acetate 3.8 parts, resin bisphenol F 5.8 parts, latent curing agent PN23J 1.4 parts. Wherein, the silver-X alloy powder, X is indium, the weight of metal indium accounts for 30% of the weight of the silver-X alloy powder, and the average particle size of the silver-X alloy powder is 1.15 μm. The above-mentioned preparation method of a low-temperature silver paste for HJT solar cells with a wide welding window, the specific steps are as follows:

[0046] ①Pre-mixing of silver paste: Take resin, solvent and latent curing agent, put them into double planetary high-speed disperser, stir at 800r / min, disperse at 65r / min, c...

Embodiment 2

[0050] A low-temperature silver paste for HJT solar cells with a wide welding window, comprising the following materials in parts by weight: 38 parts of flake silver powder with an average particle size of 1.25 μm, 48 parts of spherical silver powder with an average particle size of 0.83 μm, silver-X Alloy powder 3 parts, solvent diethylene glycol butyl ether acetate 3.8 parts, resin bisphenol F 5.8 parts, latent curing agent PN23J 1.4 parts. The silver-X alloy powder, X is tin, the weight of metal tin accounts for 30% of the weight of the silver-X alloy powder, and the average particle size of the silver-X alloy powder is 1.13 μm.

[0051] The above-mentioned preparation method of a low-temperature silver paste for HJT solar cells with a wide welding window, the specific steps are as follows:

[0052] ①Pre-mixing of silver paste: Take resin, solvent and latent curing agent, put them into double planetary high-speed disperser, stir at 800r / min, disperse at 65r / min, control tem...

Embodiment 3

[0056] A low-temperature silver paste for HJT solar cells with a wide welding window, comprising the following materials in parts by weight: 45 parts of flake silver powder with an average particle size of 1.31 μm, 41 parts of spherical silver powder with an average particle size of 0.93 μm, silver-X Alloy powder 3 parts, solvent diethylene glycol butyl ether acetate 3.8 parts, resin bisphenol F 5.8 parts, latent curing agent PN23J 1.4 parts. Wherein, the silver-X alloy powder, X is bismuth, the weight of metal bismuth accounts for 30% of the weight of the silver-X alloy powder, and the average particle size of the silver-X alloy powder is 1.73 μm.

[0057] The above-mentioned preparation method of a low-temperature silver paste for HJT solar cells with a wide welding window, the specific steps are as follows:

[0058] ①Pre-mixing of silver paste: Take resin, solvent and latent curing agent, put them into double planetary high-speed disperser, stir at 800r / min, disperse at 65r...

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Abstract

The invention relates to low-temperature silver paste for an HJT solar cell with wide welding windows and a preparation method of the low-temperature silver paste, and belongs to the technical field of polymer-based conductive materials. The low-temperature silver paste for the HJT solar cell with the wide welding window comprises silver powder, silver-X alloy powder, resin, a solvent and a curing agent. The mass ratio of the silver powder to the silver-X alloy powder to the resin to the solvent to the curing agent is (50-90): (1-10): (2-10): (0.1-10): (0.1-5); x is a metal element which has a melting point smaller than that of silver and can form an alloy with silver. The low-temperature silver paste for the HJT solar cell with the wide welding windows is wide in welding windows and good in weldability. The process is simple. The addition amount of the silver powder can be lower than 90%, the low-temperature paste is low in cost, and large-scale popularization of the heterojunction solar cell is facilitated.

Description

technical field [0001] The invention relates to a low-temperature silver paste for HJT solar cells with a wide welding window and a preparation method thereof, and belongs to the technical field of polymer-based conductive materials. Background technique [0002] Solar cells are photovoltaic devices that directly convert sunlight energy into electrical energy through the photovoltaic effect. The traditional solar cell is a crystalline silicon solar cell. In recent years, the industry has introduced a Heterojunction with Intrinsic Thin-layer (HJT) solar cell. Heterojunction technology (HJT) combines the dual advantages of crystalline silicon solar cells and thin-film technology by depositing intrinsic and doped amorphous silicon films and transparent conductive oxide (TCO) layers on both sides of n-type silicon wafers. Absorb the generated electricity, because amorphous silicon has the characteristics of strong light absorption and excellent passivation performance, which ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425
Inventor 陈浩宇王静伍洋杨红崔隆宇夏粱彭亮李加宁乔梦书张永福
Owner 四川东树新材料有限公司
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