CN115240898A - Conductive silver paste for heterojunction battery and preparation method thereof - Google Patents
Conductive silver paste for heterojunction battery and preparation method thereof Download PDFInfo
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- CN115240898A CN115240898A CN202210920045.5A CN202210920045A CN115240898A CN 115240898 A CN115240898 A CN 115240898A CN 202210920045 A CN202210920045 A CN 202210920045A CN 115240898 A CN115240898 A CN 115240898A
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910052709 silver Inorganic materials 0.000 claims abstract description 32
- 239000004332 silver Substances 0.000 claims abstract description 32
- 239000003822 epoxy resin Substances 0.000 claims description 33
- 229920000647 polyepoxide Polymers 0.000 claims description 33
- 238000000227 grinding Methods 0.000 claims description 24
- 239000011521 glass Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 15
- 239000004843 novolac epoxy resin Substances 0.000 claims description 13
- 125000002723 alicyclic group Chemical group 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000013008 thixotropic agent Substances 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 4
- 229910021485 fumed silica Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 3
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims description 2
- 239000000378 calcium silicate Substances 0.000 claims description 2
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 2
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims description 2
- -1 hexahydromethylbenzene anhydride Chemical class 0.000 claims description 2
- ZETYUTMSJWMKNQ-UHFFFAOYSA-N n,n',n'-trimethylhexane-1,6-diamine Chemical compound CNCCCCCCN(C)C ZETYUTMSJWMKNQ-UHFFFAOYSA-N 0.000 claims description 2
- 229940116411 terpineol Drugs 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000009974 thixotropic effect Effects 0.000 abstract description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- QEZFOHDPTRQZBD-UHFFFAOYSA-N [B].FN1C(C=C(C=C1C)C)C Chemical compound [B].FN1C(C=C(C=C1C)C)C QEZFOHDPTRQZBD-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000011353 cycloaliphatic epoxy resin Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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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
-
- 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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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Conductive Materials (AREA)
Abstract
The invention provides a conductive silver paste for a heterojunction cell and a preparation method thereof, and relates to the technical field of solar cell paste, wherein the raw materials of the conductive silver paste for the heterojunction cell comprise 88.4-89.55 parts by weight of a conductive phase, 0.2-0.45 part by weight of an inorganic bonding phase and 10-11.4 parts by weight of an organic carrier. The silver paste provided by the invention has excellent viscosity, tensile force, thixotropic index, solid content, printing effect and resistivity. The viscosity is 60-120 Pa.s, the thixotropic index is 3.5-5.0, the solid content is 91-94.5 wt%, the tensile force is 1.59-2.82N, the printing speed is 300-400 mm/s, the spreading speed is 600-800 mm/s, the printing effect is good, and the electrical property of the battery is excellent when the battery is used for the positive and negative surfaces of a battery, particularly a 9BB PVD sheet source battery.
Description
Technical Field
The invention belongs to the technical field of solar cell paste, and particularly relates to conductive silver paste for a heterojunction cell and a preparation method thereof.
Background
With the advancement of science and technology, the battery technology is iterated to an N type and is developed towards an efficient route. The conversion efficiency of the p-type cell is greatly limited due to the problems of light attenuation, light and heat attenuation and potential induced attenuation, but the efficiency potential of the heterojunction cell exceeds 28% and is far higher than that of the traditional p-type cell. Compare in the high temperature silver thick liquid on traditional P type battery, the HIT (heterojunction) battery of N type need use low temperature silver thick liquid owing to the sensitivity of inside amorphous silicon layer to the temperature, just can not cause the damage to the film structure of HJT battery, consequently, is also changing to the demand of battery silver thick liquid.
Patent No. CN109273137B provides a low-temperature conductive silver paste for a solar HIT cell and a preparation method thereof, and a low-viscosity carrier resin is prepared by mixing acrylic modified epoxy resin and diethylene glycol butyl ether acetate, so that the viscosity of the silver paste is improved to 260-300 Pa.s. Patent No. CN111145934B provides a silver paste for a Heterojunction (HIT) solar cell capable of being stored at room temperature and a preparation method thereof, wherein 1-fluoro-2, 4, 6-trimethylpyridine boron tetrafluoride is used, so that the viscosity of the silver paste is 133.5Pa · s, and the silver paste can be stored at room temperature for a long time.
In general, the glass powder is only added into the high-temperature conductive silver paste, and the adding proportion is generally 1 to 2 weight percent. The defect of printing effect is increased on the contrary by too high or too low proportion of the added glass powder; the thermal expansion coefficient of the added glass powder is too high or too low, so that the Isc (short circuit current) is too low in the printing process, and the screen printing plate is difficult to clean due to the phenomenon of adhering to the screen printing plate when the screen printing plate is cleaned after printing.
However, in the prior art, the viscosity of the silver paste and the tensile force after the interconnection of the electrodes still cannot be balanced, and the printability of the silver paste is affected.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the present invention, there is provided a conductive silver paste for a heterojunction cell comprising 88.4 to 89.55 parts by weight of a conductive phase, 0.2 to 0.45 parts by weight of an inorganic binder phase, and 10 to 11.4 parts by weight of an organic vehicle.
Preferably, the conductive phase comprises a plate-like silver powder and a spherical silver powder, wherein the weight ratio of the plate-like silver powder to the spherical silver powder is 25 to 38, and further 29.6;
the particle size of the flake silver powder is 2-7 um, and the particle size of the spherical silver powder is 1-4 um.
Preferably, the inorganic binder phase is glass powder, the adding proportion of the glass powder accounts for 0.2-0.45 wt% of the total mass of the conductive silver paste, and the thermal expansion coefficient of the glass powder is 50 x 10 -7 /℃～100×10 -7 The particle size is 1.5-3.5 um.
Preferably, the organic vehicle comprises, among others, an epoxy resin, a curing agent, a solvent, a thixotropic agent and a dispersing agent.
Preferably, the epoxy resin is one or more of alicyclic epoxy resin, novolac epoxy resin and bisphenol F type epoxy resin, and the tensile strength of the novolac epoxy resin is 55-67 MPa;
when the epoxy resin is selected from alicyclic epoxy resin and novolac epoxy resin, the weight ratio of alicyclic epoxy resin to novolac epoxy resin is 1.
Preferably, the curing agent is one or more of tetraethylenepentamine, hexahydromethylbenzene anhydride and trimethyl hexamethylene diamine.
Preferably, the thixotropic agent is fumed silica and/or calcium silicate.
Preferably, in the organic vehicle, the weight ratio of the epoxy resin, the curing agent, the thixotropic agent and the dispersing agent is 6 to 9.
Preferably, the solvent is at least one of diethylene glycol butyl ether acetate and terpineol.
A preparation method of conductive silver paste for a heterojunction battery comprises the following steps:
the method comprises the following steps of: pouring epoxy resin, a curing agent, a thixotropic agent and a dispersing agent into a reaction kettle, adding a solvent until the volume is 1.3-2 times of the original volume, controlling the temperature of the reaction kettle at 30-40 ℃, stirring at a speed of 1500r/min for 2-3 hours until uniform viscous liquid is formed, and then filtering by using a 250-mesh filter screen to obtain an organic carrier;
step two, silver paste mixing, and the specific method comprises the following steps: adding the conductive phase, the inorganic adhesive and the organic carrier into a double-planet stirring kettle, controlling the temperature within 40 ℃, stirring at 100r/min and 150r/min at a dispersion disc, and stirring for 4 hours to obtain uniformly stirred slurry;
step three, three-roller grinding and filtering, the specific method comprises the following steps: grinding the uniformly stirred slurry in the step two for two times at grinding gaps of 80um and 60 um; grinding twice with grinding gaps of 60um and 30 um; grinding twice with grinding clearance of 40um, 20um, grinding the end, test fineness with the scraper blade fineness meter and be less than 10um, obtain electrically conductive silver thick liquid.
The invention at least comprises the following beneficial effects: in the invention, 0.2-0.45 wt% of silver paste system is added with the thermal expansion coefficient of (50-100) multiplied by 10 -7 The glass powder with the grain size of 1.5-3.5 um is beneficial to ensuring good printing effect and reducing the resistivity of the silver paste. The phenolic epoxy resin and the alicyclic epoxy resin with the tensile strength of 55-67 MPa are added into the organic carrier, the weight ratio of the alicyclic epoxy resin to the phenolic epoxy resin is controlled to be 1 (2-3), the viscosity of the conductive silver paste is reduced, the fluidity of the silver paste is improved, the weldability of the silver paste is improved, the silver paste and the electrode are well combined after interconnection, the printing effect of the silver paste is also improved unexpectedly, the recess of the obtained silver paste after screen printing is reduced, and the collapse degree of the fine grid is reduced. The silver paste provided by the invention has excellent viscosity, tensile force, thixotropic index, solid content, printing effect and resistivity. The viscosity is 60-120 Pa.s, the thixotropic index is 3.5-5.0, the solid content is 91-94.5 wt%, the tensile force is 1.59-2.82N, the printing speed is 300-400 mm/s, the spreading speed is 600-800 mm/s, the printing effect is good, and the electrical property of the battery is excellent when the battery is used for the positive and negative surfaces of a battery, particularly a 9BB PVD sheet source battery.
General conditionsUnder the condition, the glass powder is only added into the high-temperature conductive silver paste, and the adding proportion is generally 1 to 2 weight percent. In the present application, however, applicants have found that the addition of 0.2 to 0.45wt% of a silver paste system having a coefficient of thermal expansion of (50 to 100). Times.10 -7 The glass powder with the grain size of 1.5-3.5 um is beneficial to ensuring good printing effect and reducing the resistivity of the silver paste.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is an SEM scanning electron micrograph of the conductive silver paste obtained in example 1.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The compositions of the examples were prepared from commercially available raw materials, wherein the plate-like silver powders of examples 1 and 3 were obtained from different sources, the plate-like silver powder of example 1 was obtained from BROFO, having a Brofos-Ag-P05 in trade name and a particle size of 5um, the plate-like silver powder of example 3 was obtained from BROFO, having a Brofos-Ag-P01 in trade name and a particle size of 1um, the spherical silver powder was obtained from BROFO, having a Brofos-Ag-W02 in trade name and a particle size of 2um, the glass frit was obtained from Guizhou Baibo in trade name of BYB552 in trade name of thermal expansion coefficient (80-90). Times.10 -7 V. degree, particle size 2.5um, novolac Epoxy resin from Nippon Sumitomo, model E16521A, tensile strength 62MPa, cycloaliphatic Epoxy resin from Xinnaxi, model Syna Epoxy S-100, fumed silica from Hubei Huichi nanometer materials GmbH, model HL-300, dispersant from bike, model BYK-111.
Example 1
This example provides a conductive silver paste for a heterojunction cell, which comprises 89kg of electrical phase, 0.34kg of glass frit and 10.66kg of organic vehicle.
The conductive phase is flake silver powder and spherical silver powder. In the conductive phase, the weight ratio of the flake silver powder to the spherical silver powder was 29.6, 59.4, and the flake silver powder was purchased from BROFO under the trade name Brofos-Ag-P05, and had a particle size of 5um.
The inorganic binding phase is glass powder.
The organic carrier comprises the raw materials of resin, a curing agent, a solvent, a thixotropic agent and a dispersing agent. In the organic vehicle, the weight ratio of the epoxy resin, the curing agent, the thixotropic agent and the dispersing agent is 7.4.
The epoxy resin is alicyclic epoxy resin and novolac epoxy resin. In the epoxy resin, the weight ratio of the alicyclic epoxy resin to the novolac epoxy resin is 1.
The curing agent is tetraethylenepentamine.
The thixotropic agent is fumed silica.
The organic carrier also comprises a solvent, and the solvent is diethylene glycol butyl ether acetate.
The embodiment also provides a preparation method of the conductive silver paste for the heterojunction battery, which comprises the following steps: the preparation method of the organic carrier comprises the following steps: pouring epoxy resin, a curing agent, a thixotropic agent and a dispersing agent into a reaction kettle, adding a solvent until the volume is 1.5 times of the original volume, controlling the temperature of the reaction kettle to be 30-40 ℃, stirring at a speed of 1500r/min for 3 hours until uniform viscous liquid is formed, and then filtering by using a 250-mesh filter screen to obtain an organic carrier;
step two, silver paste mixing, and the specific method comprises the following steps: adding the conductive phase, the inorganic adhesive and the organic carrier into a double-planet stirring kettle, controlling the temperature within 40 ℃, stirring at 100r/min and a dispersion disc at 150r/min, and stirring for 4 hours to obtain uniformly stirred slurry;
step three, three-roller grinding and filtering, the specific method comprises the following steps: grinding the uniformly stirred slurry in the step two for two times at grinding gaps of 80um and 60 um; grinding twice with grinding gaps of 60um and 30 um; grinding twice with grinding clearance of 40um, 20um, grinding the end, test fineness with the scraper blade fineness meter and be less than 10um, obtain electrically conductive silver thick liquid.
Example 2
This example provides a conductive silver paste for a heterojunction cell, which is different from example 1 in that the raw material includes 88.5kg of a conductive phase, 0.5kg of an inorganic binder phase, and 11kg of an organic vehicle.
The embodiment also provides a preparation method of the conductive silver paste for the heterojunction cell, which is the same as the embodiment 1.
Example 3
This example provides a conductive silver paste for a heterojunction battery, which differs from example 1 in that the flake silver powder is obtained from broofo, cat # BROFOs-Ag-P01, and has a particle size of 1um, and the weight ratio of the flake silver powder to the spherical silver powder in the conductive phase is 27.
The embodiment also provides a preparation method of the conductive silver paste for the heterojunction cell, which is the same as the embodiment 1.
Example 4
The present example provides a conductive silver paste for a heterojunction cell, which is different from example 1 in that the raw material of the conductive silver paste for the heterojunction cell comprises 89kg of a conductive phase, 0.1kg of an inorganic binder phase, and 10kg of an organic vehicle.
The embodiment also provides a preparation method of the conductive silver paste for the heterojunction cell, which is the same as the embodiment 1.
Example 5
The present embodiment provides a conductive silver paste for a heterojunction battery, which is different from embodiment 1 in that the weight ratio of the alicyclic epoxy resin to the novolac epoxy resin in the epoxy resin is 1.
The embodiment also provides a preparation method of the conductive silver paste for the heterojunction cell, which is the same as the embodiment 1.
And (3) performance testing: viscosity test the conductive silver pastes obtained in examples 1 to 5 were tested using a viscosity tester and the results are shown in table 1:
TABLE 1
| Examples | Viscosity (Pa. S,25 ℃ C.) |
| 1 | 90 |
| 2 | 95 |
| 3 | 104 |
| 4 | 155 |
| 5 | 172 |
As can be seen from table 1, the viscosity of the conductive silver paste prepared in example 1 is significantly lower than that of examples 2-5.
Solid content test: the conductive silver pastes obtained in examples 1 to 5 were tested using a muffle furnace and the results are given in table 2:
TABLE 2
| Examples | Solid content (wt%) |
| 1 | 92 |
| 2 | 91 |
| 3 | 89 |
| 4 | 85 |
| 5 | 87 |
As can be seen from table 2, the solid content of the conductive silver paste prepared in example 1 can reach 92%, which is significantly higher than that of examples 2 to 5.
And (3) testing tension: the conductive silver pastes of examples 1-5 were tested using a 9BB PVD sheet source, per YS/T612-2014, with the results shown in table 3:
TABLE 3
| Examples | Battery piece front pull (N) |
| 1 | 2.91 |
| 2 | 2.85 |
| 3 | 2.78 |
| 4 | 2.37 |
| 5 | 2.33 |
As can be seen from table 3, in example 1, the amount of the glass powder is 0.34wt%, in the epoxy resin, the weight ratio of the alicyclic epoxy resin to the novolac epoxy resin is 1.5, and the technical scheme provided by the present invention is adopted, so that the front tension of the battery piece of the prepared conductive silver paste is superior to that in examples 2 to 5.
And (4) SEM test: the conductive silver paste obtained in example 1 is tested by using an SEM, and the result is shown in fig. 1, and it can be seen from fig. 1 that the conductive silver paste prepared in this example is densely filled and has relatively good conductivity.
And (3) testing the battery efficiency: the conductive silver pastes obtained in examples 1-5 were tested using a photovoltaic apparatus of type jiejiegao 2A, using a 9BB PVD film source for cell selection, cured at 180 ℃ for 38min, with the results shown in table 4:
TABLE 4
As can be seen from table 4, the conductive silver pastes prepared in examples 1 to 5 all have very high charge and discharge efficiency Eta, short circuit current Isc and fill factor FF when the 9BB PVD sheet source is used as the battery plate, wherein the charge and discharge efficiency Eta, short circuit current Isc and fill factor FF are significantly better than those of the conductive silver pastes prepared in example 2 with the glass frit content of 0.34wt% in example 1.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.
Claims (10)
1. The conductive silver paste for the heterojunction battery is characterized by comprising 88.4-89.55 parts by weight of conductive phase, 0.2-0.45 part by weight of inorganic bonding phase and 10-11.4 parts by weight of organic carrier.
2. The conductive silver paste for a heterojunction battery according to claim 1, wherein the conductive phase is a flake silver powder and a spherical silver powder, and the weight ratio of the flake silver powder to the spherical silver powder is 25 to 38;
the particle size of the flake silver powder is 2-7 um, and the particle size of the spherical silver powder is 1-4 um.
3. The conductive silver paste for a heterojunction battery as claimed in claim 1, wherein the inorganic binder phase is glass powder, the addition proportion of the glass powder is 0.2-0.45 w/t% of the total mass of the conductive silver paste, and the thermal expansion coefficient of the glass powder is 50 x 10 -7 /℃～100×10 -7 The particle size is 1.5-3.5 um.
4. The conductive silver paste for a heterojunction cell of claim 1, wherein the organic vehicle comprises an epoxy resin, a curing agent, a solvent, a thixotropic agent and a dispersant.
5. The conductive silver paste for a heterojunction battery according to claim 4, wherein the epoxy resin is one or more of alicyclic epoxy resin, novolac epoxy resin and bisphenol F type epoxy resin, and the novolac epoxy resin has a tensile strength of 55 to 67MPa;
when the epoxy resin is selected from alicyclic epoxy resin and novolac epoxy resin, the weight ratio of alicyclic epoxy resin to novolac epoxy resin is 1.
6. The conductive silver paste for a heterojunction cell of claim 4, wherein the curing agent is one or more of tetraethylenepentamine, hexahydromethylbenzene anhydride and trimethylhexamethylenediamine.
7. The conductive silver paste for a heterojunction cell of claim 4, wherein the thixotropic agent is fumed silica and/or calcium silicate.
8. The conductive silver paste for a heterojunction battery according to claim 4, wherein the weight ratio of the epoxy resin, the curing agent, the thixotropic agent and the dispersing agent in the organic vehicle is 6-9: 2.1-2.7: 0.45-1.
9. The conductive silver paste for a heterojunction cell of claim 8, wherein the solvent is at least one of diethylene glycol butyl ether acetate and terpineol.
10. The method for preparing the conductive silver paste for the heterojunction battery according to any one of claims 1 to 9, comprising the following steps:
the preparation method of the organic carrier comprises the following steps: pouring epoxy resin, a curing agent, a thixotropic agent and a dispersing agent into a reaction kettle, adding a solvent until the volume is 1.3-2 times of the original volume, controlling the temperature of the reaction kettle at 30-40 ℃, stirring at a speed of 1500r/min for 2-3 hours until uniform viscous liquid is formed, and then filtering by using a 250-mesh filter screen to obtain an organic carrier;
step two, silver paste mixing, wherein the specific method comprises the following steps: adding the conductive phase, the inorganic adhesive and the organic carrier into a double-planet stirring kettle, controlling the temperature within 40 ℃, stirring at 100r/min and a dispersion disc at 150r/min, and stirring for 4 hours to obtain uniformly stirred slurry;
step three, three-roller grinding and filtering, and the specific method comprises the following steps: grinding the uniformly stirred slurry in the step two for two times at grinding gaps of 80um and 60 um; grinding twice with grinding gaps of 60um and 30 um; grinding twice with the grinding clearance of 40um, 20um, grinding is finished, and it is below 10um to test the fineness with the scraper blade fineness gauge, obtains the conductive silver paste.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3011982A1 (en) * | 2013-10-15 | 2015-04-17 | Commissariat Energie Atomique | PROCESS FOR PRODUCING A PHOTOVOLTAIC CELL |
| CN108417291A (en) * | 2018-02-08 | 2018-08-17 | 浙江正泰太阳能科技有限公司 | Conductive silver paste for solar cell and preparation method thereof and solar cell |
| CN109616240A (en) * | 2018-12-13 | 2019-04-12 | 东莞市银屏电子科技有限公司 | A kind of thin grid low-temperature conductive silver paste of solar energy HIT battery and preparation method thereof |
| CN110176325A (en) * | 2019-06-10 | 2019-08-27 | 苏州柏特瑞新材料有限公司 | A kind of low-temperature bake heterojunction solar battery conductive silver paste and preparation method thereof |
| CN112562885A (en) * | 2020-12-29 | 2021-03-26 | 四川东树新材料有限公司 | High-welding-tension main grid low-temperature silver paste for solar heterojunction battery and preparation method thereof |
| CN114334219A (en) * | 2021-12-06 | 2022-04-12 | 广东南海启明光大科技有限公司 | Low-temperature curing silver paste for heterojunction solar cell and preparation method and application thereof |
-
2022
- 2022-08-01 CN CN202210920045.5A patent/CN115240898A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3011982A1 (en) * | 2013-10-15 | 2015-04-17 | Commissariat Energie Atomique | PROCESS FOR PRODUCING A PHOTOVOLTAIC CELL |
| CN108417291A (en) * | 2018-02-08 | 2018-08-17 | 浙江正泰太阳能科技有限公司 | Conductive silver paste for solar cell and preparation method thereof and solar cell |
| CN109616240A (en) * | 2018-12-13 | 2019-04-12 | 东莞市银屏电子科技有限公司 | A kind of thin grid low-temperature conductive silver paste of solar energy HIT battery and preparation method thereof |
| CN110176325A (en) * | 2019-06-10 | 2019-08-27 | 苏州柏特瑞新材料有限公司 | A kind of low-temperature bake heterojunction solar battery conductive silver paste and preparation method thereof |
| CN112562885A (en) * | 2020-12-29 | 2021-03-26 | 四川东树新材料有限公司 | High-welding-tension main grid low-temperature silver paste for solar heterojunction battery and preparation method thereof |
| CN114334219A (en) * | 2021-12-06 | 2022-04-12 | 广东南海启明光大科技有限公司 | Low-temperature curing silver paste for heterojunction solar cell and preparation method and application thereof |
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