Solar cell conductive silver paste free of silicone oil and application thereof

A technology for solar cells and conductive silver paste, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc. , to achieve the effect of improving the linear aspect ratio, improving the viscosity characteristics, and improving the conductivity and plasticity.

Active Publication Date: 2021-10-08
SUZHOU ISILVER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solar cell conductive silver paste does not need to add silicone oil during the preparation process, which avoids the problems that the front conductive silver paste containing silicon oil cannot completely volatilize the silicone oil during the sintering process, and there is silicon residue, which will cause the series resistance of the cell to increase and the sintering to be poor. occur

Method used

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  • Solar cell conductive silver paste free of silicone oil and application thereof
  • Solar cell conductive silver paste free of silicone oil and application thereof
  • Solar cell conductive silver paste free of silicone oil and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]This embodiment provides a series of polymer additives, and the raw material composition of each polymer additive is shown in Table 1 in parts by weight.

[0033] Table 1

[0034]

[0035] The preparation method of the above-mentioned polymer additive is as follows: uniformly mixing the dendritic polymer and the polar solvent according to the ratio to obtain the polymer additive.

Embodiment 2

[0037] This embodiment provides a series of conductive silver pastes. The raw material composition of each conductive silver paste is shown in Table 2, based on the total weight of the silver paste raw materials as 100%. Among them, the numbers corresponding to the organic resin, organic solvent, thixotropic agent and dispersant are the parts by weight of each component in the organic vehicle, for example: in formula combination 1, the organic vehicle is composed of a weight ratio of 10:75:5 : 10 organic resins, organic solvents, thixotropic agents and dispersants, and the weight ratio of the organic vehicle in the raw materials is 14.5%. The polymer additives in Table 2 can be any one or a combination of two or more of the polymer additives shown in Table 1.

[0038] The glass powder used in Table 2 is a tellurite glass powder composition with an average particle size of 0.1 μm-5 μm and a softening point of 200°C-600°C; the silver powder is spherical silver powder with a tap ...

Embodiment 3

[0045] This embodiment provides the test results of the viscosity characteristics, plastic characteristics, sintering ability and tensile ability of the conductive silver paste, which are summarized in Table 3.

[0046] Example samples 5-1 to 5-5 in table 3 represent the conductive silver paste obtained according to the formula composition in table 2, and the polymer additives used are respectively the raw materials whose serial numbers are 3, 6, 9, 12 and 18 in table 1 composition. The preparation method of conductive silver paste is: mix silver powder, glass powder, organic vehicle and polymer additive according to a certain proportion, grind and disperse through three-roll mill after mixing, and control the average scraper fineness of silver paste to below 10 μm, preferably controlled The fineness reaches below 5μm.

[0047] For example, the preparation method of embodiment sample 5-1 is:

[0048] 1. Mix dendritic polyamide, dendritic polyester resin, ethylene glycol, eth...

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Abstract

The invention provides solar cell conductive silver paste free of silicone oil and application thereof. Raw materials of the conductive silver paste comprise silver powder, glass powder, an organic carrier and a polymer additive, and the polymer additive comprises a dendritic polymer and a polar solvent. The invention further provides a solar cell which comprises the solar cell conductive silver paste free of silicone oil. According to the conductive silver paste provided by the invention, silicone oil does not need to be added, and the problems that the silicone oil cannot be completely volatilized in the sintering process, silicon residues exist, the series resistance of a battery piece is increased, and sintering is poor in the front conductive silver paste containing the silicone oil are solved.

Description

technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a silicone oil-free solar cell conductive silver paste and an application thereof. Background technique [0002] Solar energy is the source of energy for the earth. It is widely distributed and easy to obtain. It is an inexhaustible clean energy source. In the context of the depletion of non-renewable energy such as coal and oil, the development of solar energy is imminent. Solar cells have emerged as the times require and become the most direct and effective means of developing and utilizing solar energy. Among them, silicon-based solar energy has become the most mature and commercialized solar cell solution. [0003] The electrode is responsible for collecting and exporting the current generated by the battery sheet, which is one of the cores of the manufacturing process of crystalline silicon solar cells. Among the many processes for manufacturing electrodes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 汪山周欣山
Owner SUZHOU ISILVER MATERIALS
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