CN115331865A - Organic carrier for double-sided PERC aluminum paste and preparation method thereof - Google Patents
Organic carrier for double-sided PERC aluminum paste and preparation method thereof Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 51
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- 230000001070 adhesive effect Effects 0.000 claims abstract description 13
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- 239000003960 organic solvent Substances 0.000 claims description 40
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 claims description 32
- 229920000147 Styrene maleic anhydride Polymers 0.000 claims description 32
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- 229920002301 cellulose acetate Polymers 0.000 claims description 11
- 229910019142 PO4 Inorganic materials 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
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- 239000010452 phosphate Substances 0.000 claims description 10
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- 239000002253 acid Substances 0.000 claims description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
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- 238000007599 discharging Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
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- 238000005516 engineering process Methods 0.000 description 6
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 4
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- 239000002994 raw material Substances 0.000 description 3
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- IBLKWZIFZMJLFL-UHFFFAOYSA-N 1-phenoxypropan-2-ol Chemical compound CC(O)COC1=CC=CC=C1 IBLKWZIFZMJLFL-UHFFFAOYSA-N 0.000 description 2
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Sustainable Energy (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
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- Paints Or Removers (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses an organic carrier for double-sided PERC aluminum paste and a preparation method thereof, belonging to the technical field of solar cells, wherein the organic carrier for double-sided PERC aluminum paste comprises an organic adhesive, a thixotropic agent and a surface dispersing agent, and the mass ratio of the organic adhesive to the thixotropic agent to the surface dispersing agent is as follows: thixotropic agent: dispersant = (150 to 200): (1.5-3.5): (2.5-4.5). The invention can balance two aspects of metallization contact and passivation of the double-sided PERC aluminum paste by taking the organic adhesive, the thixotropic agent and the surface dispersant with specific compositions as an organic carrier, has good printing performance and plasticity, obviously improves important parameters such as PL corrosion strength, contact resistance, line resistance, BSF thickness, doping concentration and passive film corrosion, obviously improves the efficiency and improves the double-sided rate.
Description
Technical Field
The invention relates to the technical field of solar cells, in particular to an organic carrier for double-sided PERC aluminum paste and a preparation method thereof.
Background
Since the photovoltaic industry to the advent of PERC technology, the permeability of PERC cells in 2021 has been over 70% through three or four years of rapid development, wherein the double-sided PERC technology has become the mainstream of PERC. The efficiency improvement brought by the double-sided PERC is mainly represented by improvement of slurry, the double-sided PERC aluminum slurry can support grid line pattern printing, the back contact area is reduced to the maximum extent, lower volume resistance is kept, and the double-sided rate is greatly improved while the front efficiency is ensured as much as possible. Statistically, the double-sided PERC battery can bring 10-25% of power generation gain under the premise of hardly increasing the cost.
However, with technological innovations and product upgrades, high efficiency solar cells such as HJT and TOPCon have created challenges to the faucet position of the double-sided PERC cell. The efficiency of the double-sided PERC battery on the current production line is about 23.0-23.4%, the efficiency of the TOPCon battery is about 24%, and the efficiency of the HJT battery is about 24.5%, and meanwhile, the theoretical limit efficiency of the PERC technology is 24.5%, which is far lower than 27.5% of HJT and 28.7% of TOPCon, although the TOPCon and the HJT technologies are limited by cost problems and cannot be comprehensively spread, the absolute advantage of the efficiency is that the application of the double-sided PERC technology is limited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the organic carrier for the double-sided PERC aluminum paste and the preparation method thereof.
In order to realize the purpose, the invention adopts the technical scheme that:
the organic carrier for the double-sided PERC aluminum paste comprises an organic adhesive, a thixotropic agent and a surface dispersing agent, wherein the mass ratio of the organic adhesive to the thixotropic agent to the surface dispersing agent is as follows: thixotropic agent: dispersant = (150 to 200): (1.5-3.5): (2.5-4.5).
The inventor of the present invention found in a great deal of research that the organic vehicle obtained by using the organic binder, the thixotropic agent and the surface dispersant in the specific ratio can effectively balance the fluidity and the thixotropy of the double-sided PERC aluminum paste, so that the aluminum paste can adapt to various production process conditions.
As a preferred embodiment of the present invention, the organic binder comprises an organic resin and an organic solvent, and the mass ratio of the organic resin to the organic solvent is: organic solvent = (10 to 50): (90-150).
When the resin and the organic solvent are matched according to the mass ratio, the fluidity and the thixotropy of the double-sided PERC aluminum paste can be balanced.
In a preferred embodiment of the present invention, the organic resin is at least one of styrene maleic anhydride resin, modified acrylic resin, modified butyl cellulose acetate, ethyl cellulose, and polyvinyl butyral.
As a preferred embodiment of the present invention, the organic resin comprises styrene maleic anhydride resin, modified acrylic resin, and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin, the modified acrylic resin, and the modified butyl acetate cellulose is styrene maleic anhydride resin: modified acrylic resin: modified butyl cellulose acetate = (1 to 3): (2-6): (1-4).
As a preferred embodiment of the present invention, the organic resin comprises one or more of styrene maleic anhydride resin and modified acrylic resin, modified butyl cellulose acetate, ethyl cellulose, polyvinyl butyral.
As a preferred embodiment of the present invention, the organic solvent is at least one of butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol ethyl ether acetate, diethylene glycol dibenzoate, alcohol ester hexadecane, dimethyl adipate, dimethyl nylon acid, and ethylene glycol phenyl ether.
The inventor of the invention finds that when the organic resin and the organic solvent are adopted as the raw materials, the metallization contact and passivation of the double-sided PERC aluminum paste can be well balanced, and the printing performance and plasticity are good, so that the important parameters of PL corrosion strength, contact resistance, line resistance, BSF thickness, doping concentration and passivation film corrosion are obviously improved, the efficiency is obviously improved, and the double-sided rate is improved.
As a preferred embodiment of the present invention, the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate, the mass ratio of butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate being butyl carbitol: diethylene glycol dibutyl ether: diethylene glycol diethyl ether: diethylene glycol dibenzoate = (2 to 6): (0.5-2): (2-5): (1-4).
The inventors of the present invention have found, through extensive studies, that the organic resin compounded with styrene maleic anhydride resin, modified acrylic resin, and modified butyl cellulose acetate in the above-mentioned specific mass ratio, and butyl carbitol, diethylene glycol dibutyl ether in the above-mentioned specific mass ratio: the diethylene glycol diethyl ether and the diethylene glycol dibenzoate are used as organic adhesives, so that the dispersion and wetting performance of the aluminum paste are better, the aluminum paste has better thixotropic performance, the plasticity is improved, the aluminum paste has smaller line resistance and smaller corrosion performance, the open-circuit voltage is obviously improved, and the front efficiency and the double-sided rate of the double-sided PERC aluminum paste are improved.
When the types of the organic resin and/or the organic solvent are changed or the parts by mass are changed, the double-sided PERC aluminum paste metallization contact and passivation cannot be effectively balanced, so that the efficiency is reduced.
As a preferred embodiment of the present invention, the organic resin comprises styrene maleic anhydride resin, modified acrylic resin, and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin, the modified acrylic resin, and the modified butyl acetate cellulose is styrene maleic anhydride resin: modified acrylic resin: modified butyl cellulose acetate =2:5:3.
as a preferred embodiment of the present invention, the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate, the mass ratio of butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate being butyl carbitol: diethylene glycol dibutyl ether: diethylene glycol diethyl ether: diethylene glycol dibenzoate =4:1:3:2.
particularly, when the organic resin and the organic solvent are combined according to the mass ratio, the aluminum paste has the minimum line resistance and the smaller corrosion performance, the open-circuit voltage is obviously improved, and the important parameters of contact resistance, line resistance, BSF thickness, doping concentration and passivation film corrosion are obviously improved, so that the front efficiency and the double-sided rate of the double-sided PERC aluminum paste are obviously improved.
As a preferred embodiment of the present invention, the thixotropic agent is at least one of a polyurea thixotropic agent and fumed silica.
In a preferred embodiment of the present invention, the dispersant is at least one of a polypropylene maleic anhydride graft-based compound, a phosphate-based dispersant, a fatty acid-based dispersant, and dimethicone.
The invention also provides a preparation method of the organic carrier for the double-sided PERC aluminum paste, which comprises the following steps:
adding an organic solvent into a reaction kettle, heating a reaction kettle jacket by using heat conduction oil to ensure that the temperature in the kettle is 60-100 ℃, and stirring for 0.2-1 h at the rotating speed of 400-600 rpm;
adding organic resin, adjusting the temperature of the heat conducting oil to ensure that the temperature in the kettle is 100-140 ℃, stirring at the rotation speed of 600-1000 rpm for 0.5-2 h,
adjusting the temperature of the heat-conducting oil to enable the temperature in the kettle to be 50-55 ℃, adding the thixotropic agent and the dispersing agent, preserving the temperature for 0.2-1 h, and discharging to obtain the organic carrier for the double-sided PERC aluminum paste.
It should be noted that the temperature in the kettle reaches a corresponding temperature value by adjusting the temperature of the heat conduction oil.
The invention has the beneficial effects that: the invention can balance two aspects of metallization contact and passivation of the double-sided PERC aluminum paste by taking the organic adhesive, the thixotropic agent and the surface dispersant with specific compositions as an organic carrier, has good printing performance and plasticity, obviously improves important parameters such as PL corrosion strength, contact resistance, line resistance, BSF thickness, doping concentration and passive film corrosion, obviously improves the efficiency and improves the double-sided rate.
Drawings
Fig. 1 is a printed image of an aluminum paste prepared from the organic vehicle described in example 1 in the area of a PERC cell.
Fig. 2 is a printed image of an aluminum paste prepared from the organic vehicle described in example 2 in the area of a PERC cell.
Fig. 3 is a printed image of an aluminum paste prepared from the organic vehicle described in comparative example 1 in the region of a PERC cell.
Fig. 4 is a printed image of an aluminum paste prepared from the organic vehicle described in comparative example 2 in the region of a PERC cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise specified, the parts are all parts by mass.
The reagents or instruments used in the present invention are not indicated by manufacturers, and are all conventional products commercially available. The information on the raw materials used in the examples of the present invention and the comparative examples is as follows:
styrene maleic anhydride resin was purchased from Shenzhen, pasteur New materials science and technology, model: plas-easy A1058.
The modified acrylic resin is purchased from Shanghai Borler chemical Co., ltd, model number: BM99.
Modified butyl cellulose acetate was purchased from eastman chemical company, model number: CAB-381-20.
Polyvinyl butyral was purchased from, model number: and B16H.
Maleic anhydride grafted polypropylene was purchased from, model number: POE grafted GMA.
Phosphate dispersants were purchased from DISPARLON, model: and DA-234.
The preparation methods of the organic vehicle for the double-sided PERC aluminum paste described in the examples and the comparative examples respectively comprise the following steps:
adding an organic solvent into the reaction kettle shown in the figure 1, heating a jacket of the reaction kettle by using heat conduction oil to ensure that the temperature in the kettle is 80 ℃, and stirring for 0.5h at the rotating speed of 200 rpm;
adding organic resin, adjusting the temperature of the heat-conducting oil to make the temperature in the kettle be 120 ℃, stirring at the rotation speed of 800rpm for 1h,
adjusting the temperature of the heat-conducting oil to make the temperature in the kettle be 53.5 ℃, adding the thixotropic agent and the dispersing agent, preserving the temperature for 0.5h, and discharging to obtain the organic carrier for the double-sided PERC aluminum paste.
Example 1
An organic vehicle for a double-sided PERC aluminum paste, comprising: 171 parts by mass of an organic binder, 2.4 parts by mass of a thixotropic agent, and 3.3 parts by mass of a surface dispersant.
The organic adhesive comprises organic resin and organic solvent, wherein the mass ratio of the organic resin to the organic solvent is 21:150.
the organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is 2:5:3.
the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether and diethylene glycol dibenzoate, and the mass ratio of the butyl carbitol to the diethylene glycol dibutyl ether to the diethylene glycol diethyl ether to the diethylene glycol dibenzoate is 4.
The thixotropic agent comprises polyamide wax and fumed silica, and the mass ratio of the polyamide wax to the fumed silica is 1.1.
The dispersing agent comprises maleic anhydride grafted polypropylene and a phosphate dispersing agent, wherein the mass ratio of the maleic anhydride grafted polypropylene to the phosphate dispersing agent is 0.5.
Example 2
An organic vehicle for a double-sided PERC aluminum paste, comprising: 171 parts by mass of an organic binder, 2.4 parts by mass of a thixotropic agent, and 2.55 parts by mass of a surface dispersant.
The organic adhesive comprises organic resin and organic solvent, wherein the mass ratio of the organic resin to the organic solvent is 21:150.
the organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is 2:5:3.
the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether and diethylene glycol dibenzoate, and the mass ratio of the butyl carbitol to the diethylene glycol dibutyl ether to the diethylene glycol diethyl ether to the diethylene glycol dibenzoate is 4.
The thixotropic agent comprises polyamide wax and fumed silica, and the mass ratio of the polyamide wax to the fumed silica is 1.1.
The dispersant is phosphate dispersant.
Example 3
An organic vehicle for a double-sided PERC aluminum paste, comprising: 150 parts by mass of an organic binder, 1.5 parts by mass of a thixotropic agent, and 4.5 parts by mass of a surface dispersant.
The organic adhesive comprises organic resin and organic solvent, wherein the mass ratio of the organic resin to the organic solvent is 50:100.
the organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, wherein the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is that the styrene maleic anhydride resin: modified acrylic resin: modified butyl cellulose acetate =3:3:4.
the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether and diethylene glycol dibenzoate, and the mass ratio of the butyl carbitol to the diethylene glycol dibutyl ether to the diethylene glycol diethyl ether to the diethylene glycol dibenzoate is 6.
The thixotropic agent comprises polyamide wax and fumed silica, and the mass ratio of the polyamide wax to the fumed silica is 1.1.
The dispersing agent comprises maleic anhydride grafted polypropylene and a phosphate dispersing agent, wherein the mass ratio of the maleic anhydride grafted polypropylene to the phosphate dispersing agent is 0.5.
Example 4
An organic vehicle for a double-sided PERC aluminum paste, comprising: 200 parts by mass of an organic binder, 3.5 parts by mass of a thixotropic agent, and 2.5 parts by mass of a surface dispersant.
The organic adhesive comprises organic resin and organic solvent, wherein the mass ratio of the organic resin to the organic solvent is 50:150.
the organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, wherein the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is that the styrene maleic anhydride resin: modified acrylic resin: modified butyl cellulose acetate =1:6:3.
the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether and diethylene glycol dibenzoate, and the mass ratio of the butyl carbitol to the diethylene glycol dibutyl ether to the diethylene glycol diethyl ether to the diethylene glycol dibenzoate is 2.
The thixotropic agent comprises polyamide wax and fumed silica, and the mass ratio of the polyamide wax to the fumed silica is 1.1.
The dispersing agent comprises maleic anhydride grafted polypropylene and a phosphate dispersing agent, wherein the mass ratio of the maleic anhydride grafted polypropylene to the phosphate dispersing agent is 0.5.
Example 5
Example 5 differs from example 1 in that the organic resin described in example 5 is selected differently from example 1, and is otherwise the same.
The organic resin comprises styrene maleic anhydride resin, polyvinyl butyral and ethyl cellulose, and the mass ratio of the styrene maleic anhydride resin to the polyvinyl butyral to the ethyl cellulose is 2:5:3.
example 6
Example 6 differs from example 1 in that the organic solvent described in example 6 is different from example 1, and is the same as the others.
The organic solvent comprises dimethyl adipate, dimethyl nylon acid, ethylene glycol phenyl ether and diethylene glycol dibenzoate, wherein the mass ratio of the dimethyl adipate to the dimethyl nylon acid to the ethylene glycol phenyl ether to the diethylene glycol dibenzoate is 4.
Comparative example 1
Comparative example 1 is different from example 2 in that the mass ratio of styrene maleic anhydride resin, modified acrylic resin, modified butyl acetate cellulose in the organic resin described in comparative example 2 is different from example 2, which is not within the scope defined by the present invention, and the others are the same.
The organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is 4:1:5.
comparative example 2
Comparative example 2 is different from example 2 in that the mass ratio of butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate in the organic solvent described in comparative example 2 is different from example 2,
the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether and diethylene glycol dibenzoate, and the mass ratio of the butyl carbitol to the diethylene glycol dibutyl ether to the diethylene glycol diethyl ether to the diethylene glycol dibenzoate is 1.5.
Comparative example 3
Comparative example 3 differs from example 2 in that the organic resin of comparative example 3 is selected differently from example 2, and is otherwise the same.
The organic resin comprises polyvinyl alcohol Ding Quanzhi, epoxy resin and diethylene glycol monobutyl ether acetate, and the mass ratio of the polyvinyl alcohol Ding Quanzhi to the epoxy resin to the diethylene glycol monobutyl ether acetate is 2:5:3.
comparative example 4
Comparative example 4 differs from example 2 in that the organic solvent described in comparative example 4 is selected differently from example 2, and is otherwise the same.
The organic solvent comprises tributyl acetylcitrate, diethylene glycol dibutyl ether, butyl carbitol acetate and propylene glycol phenyl ether, and the mass ratio of the tributyl acetylcitrate, the diethylene glycol dibutyl ether, the butyl carbitol acetate and the propylene glycol phenyl ether is 4.
Test example
The same aluminum powder and glass powder are used according to the following mass percent: 78% of aluminum powder, 2% of glass powder and 20% of organic carrier, and the organic carriers described in the above examples 1-6 and comparative examples 1-4 are matched to prepare aluminum paste for testing.
1. The aluminum pastes of examples 1 to 2 and comparative examples 1 to 2 were printed in the areas of the PERC cell, and the printing properties and plasticity were shown in fig. 1 to 4, respectively, and it can be seen from fig. 1 to 4 that examples 1 and 2 had no ghost at all, the middle of comparative example 2 had a slight ghost, and the middle and the edge of comparative example 1 had a severe ghost.
2. The aluminum pastes described in examples 1 to 6 and comparative examples 1 to 4 were printed in the area of the PERC cell, and the printing performance, open circuit voltage and double-sided rate of the aluminum pastes were measured, and the test results are shown in tables 1 and 2.
TABLE 1
TABLE 2
| Counting | Eta | Voc | Isc | FF | Rsh | RS | Double face ratio | |
| Example 1 | 3000 | 23.501 | 0.6855 | 11.344 | 83.14 | 563.3 | 1.26 | 75.8 |
| Example 2 | 3010 | 23.498 | 0.6853 | 11.344 | 83.11 | 560.1 | 1.27 | 75.6 |
| Example 3 | 3294 | 23.487 | 0.6848 | 11.333 | 83.04 | 559.5 | 1.30 | 74.2 |
| Example 4 | 3315 | 23.486 | 0.6849 | 11.336 | 83.09 | 559.4 | 1.29 | 74.0 |
| Example 5 | 3084 | 23.479 | 0.6849 | 11.335 | 83.06 | 558.3 | 1.31 | 74.1 |
| Example 6 | 3116 | 23.485 | 0.6848 | 11.334 | 83.07 | 558.1 | 1.30 | 73.9 |
| Comparative example 1 | 3288 | 23.468 | 0.6842 | 11.323 | 82.94 | 539.5 | 1.33 | 73.7 |
| Comparative example 2 | 3119 | 23.463 | 0.6843 | 11.326 | 82.90 | 539.4 | 1.39 | 73.0 |
| Comparative example 3 | 3275 | 23.465 | 0.6842 | 11.325 | 82.94 | 538.7 | 1.36 | 73.2 |
| Comparative example 4 | 3135 | 23.466 | 0.6843 | 11.324 | 82.92 | 539.1 | 1.39 | 73.6 |
As can be seen from tables 1 and 2, the aluminum paste prepared from the organic carrier prepared by the invention has the advantages of narrow line width, highest double-sided rate, small line resistance, small corrosion to the laser grooving part of the cell, good contact, improved open-circuit voltage, larger FF and highest efficiency.
It can be seen from comparative examples 1 to 6 that different organic carriers, selection of organic solvents and different raw material ratios can affect the performance of the prepared organic carrier to a certain extent, wherein example 1 is the best mode and has the best performance.
It is understood from the comparison of example 2 and comparative examples 1 to 4 that if the mass ratio of the organic solvent to the organic resin and the selection of the organic solvent to the organic resin are out of the range of the present invention, the efficiency, line width, line resistance, contact resistivity, corrosion, etc. are significantly reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The organic carrier for the double-sided PERC aluminum paste is characterized by comprising an organic adhesive, a thixotropic agent and a surface dispersing agent, wherein the mass ratio of the organic adhesive to the thixotropic agent to the surface dispersing agent is as follows: thixotropic agent: dispersant = (150 to 200): (1.5-3.5): (2.5-4.5).
2. The organic vehicle for the double-sided PERC aluminum paste according to claim 1, wherein the organic binder comprises an organic resin and an organic solvent, and the mass ratio of the organic resin to the organic solvent is organic resin: organic solvent = (10 to 50): (90-150).
3. The organic vehicle for double-sided PERC aluminum paste as claimed in claim 2, wherein the organic resin is at least one of styrene maleic anhydride resin, modified acrylic resin, modified butyl cellulose acetate, ethyl cellulose, and polyvinyl butyral.
4. The organic carrier for the double-sided PERC aluminum paste according to claim 3, wherein the organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is that the styrene maleic anhydride resin: modified acrylic resin: modified butyl cellulose acetate = (1 to 3): (2-6): (1-4).
5. The organic vehicle for the dual-sided PERC aluminum paste according to claim 2, wherein the organic solvent is at least one of butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol ethyl ether acetate, diethylene glycol dibenzoate, alcohol ester hexadecane, dimethyl adipate, dimethyl nylon acid, and ethylene glycol phenyl ether.
6. The organic vehicle for a double-sided PERC aluminum paste according to claim 5, wherein the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate, the mass ratio of butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dibenzoate being butyl carbitol: diethylene glycol dibutyl ether: diethylene glycol diethyl ether: diethylene glycol dibenzoate = (2 to 6): (0.5-2): (2-5): (1-4).
7. The organic carrier for the double-sided PERC aluminum paste according to claim 2, wherein the organic resin comprises styrene maleic anhydride resin, modified acrylic resin and modified butyl acetate cellulose, and the mass ratio of the styrene maleic anhydride resin to the modified acrylic resin to the modified butyl acetate cellulose is that the styrene maleic anhydride resin: modified acrylic resin: modified butyl cellulose acetate =2:5:3;
the organic solvent comprises butyl carbitol, diethylene glycol dibutyl ether, diethylene glycol diethyl ether and diethylene glycol dibenzoate, wherein the mass ratio of the butyl carbitol to the diethylene glycol dibutyl ether to the diethylene glycol diethyl ether to the diethylene glycol dibenzoate is butyl carbitol: diethylene glycol dibutyl ether: diethylene glycol diethyl ether: diethylene glycol dibenzoate =4:1:3:2.
8. the organic vehicle for double-sided PERC aluminum paste as recited in claim 1, wherein said thixotropic agent is at least one of polyurea thixotropic agent and fumed silica.
9. The organic vehicle for the double-sided PERC aluminum paste according to claim 1, wherein the dispersant is at least one of a polypropylene maleic anhydride graft-based compound, a phosphate-based dispersant, a fatty acid-based dispersant, and a dimethicone.
10. The method of preparing the organic vehicle for double-sided PERC aluminum paste of any one of claims 1 to 9, comprising the steps of:
adding an organic solvent into a reaction kettle, heating a reaction kettle jacket by using heat conduction oil to ensure that the temperature in the kettle is 60-100 ℃, and stirring for 0.2-1 h at the rotating speed of 400-600 rpm;
adding organic resin, adjusting the temperature of the heat conducting oil to ensure that the temperature in the kettle is 100-140 ℃, stirring at the rotating speed of 600-1000 rpm for 0.5-2 h,
adjusting the temperature of the heat-conducting oil to enable the temperature in the kettle to be 50-55 ℃, adding the thixotropic agent and the dispersing agent, preserving the temperature for 0.2-1 h, and discharging to obtain the organic carrier for the double-sided PERC aluminum paste.
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| CN116285512A (en) * | 2022-12-12 | 2023-06-23 | 广州市儒兴科技股份有限公司 | Organic carrier for slurry, preparation method of organic carrier, conductive slurry and application of conductive slurry |
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