CN114360768B - Main grid silver paste for front electrode of crystalline silicon solar TOPCO battery piece and preparation method thereof - Google Patents
Main grid silver paste for front electrode of crystalline silicon solar TOPCO battery piece and preparation method thereof Download PDFInfo
- Publication number
- CN114360768B CN114360768B CN202111669055.8A CN202111669055A CN114360768B CN 114360768 B CN114360768 B CN 114360768B CN 202111669055 A CN202111669055 A CN 202111669055A CN 114360768 B CN114360768 B CN 114360768B
- Authority
- CN
- China
- Prior art keywords
- particle size
- powder
- glass powder
- size distribution
- main grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 44
- 239000004332 silver Substances 0.000 title claims abstract description 44
- 229910021419 crystalline silicon Inorganic materials 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 32
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- -1 alcohol ester Chemical class 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 5
- 239000002952 polymeric resin Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 150000008431 aliphatic amides Chemical group 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000013008 thixotropic agent Substances 0.000 claims description 3
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims description 2
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-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
- 238000000227 grinding Methods 0.000 claims description 2
- 229940116411 terpineol Drugs 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000005424 photoluminescence Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000011572 manganese Substances 0.000 description 8
- 239000010949 copper Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01B13/0036—Details
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Photovoltaic Devices (AREA)
- Conductive Materials (AREA)
Abstract
The invention relates to H01B1, in particular to front electrode main grid silver paste of a crystalline silicon solar TOPCON battery piece and a preparation method thereof. The main grid silver paste at least comprises 82-88% of spherical silver powder, 1-2% of glass powder and 10-17% of organic binder by weight percent. Through regulating and controlling particle size distribution, tap density and 538 ℃ loss on ignition condition of spherical silver powder, greatly improved sintering activity, simultaneously, the utility model abandons to add Mn, cu element in the traditional glass powder in this application, reduced the sintering activity of glass powder, reduced the destruction of thick liquids to TOPCON battery piece front rete, have the wide sintering temperature at 740~820 ℃, in addition, this glass powder can have better synergism with spherical silver powder in this application for electrode pull-out force is higher than 2N after sintering, detects its electrode part through photoluminescence tester and presents brilliant white.
Description
Technical Field
The invention relates to H01B1, in particular to front electrode main grid silver paste of a crystalline silicon solar TOPCON battery piece and a preparation method thereof.
Background
TOPCON solar cell is a tunneling oxide passivation contact (Tunnel Oxide Passivated Contact) solar cell technology based on selective carrier principle, the cell structure is an N-type silicon substrate cell, and an ultrathin silicon oxide layer and a doped silicon thin layer are sequentially prepared on the back of the cell, so that a passivation contact structure is formed, surface recombination and metal contact recombination are effectively reduced, and the conversion efficiency of the N-PERT cell is improved.
The metallization process of the front side of TOPCON cells differs from conventional P-type PERC cells, which place higher demands on the performance of the front side silver (aluminum) paste, and typically require the preparation of the front side electrode by means of secondary printing. In addition, glass powder containing Mn and Cu is commonly used in the current main grid silver paste, for example, chinese patent CN202010869014 provides a main grid silver paste of an N-type solar cell, which comprises glass powder which is copper-bismuth-manganese-tellurium glass powder, however, the glass powder containing Mn and Cu can lead the film layer in the TOPCON main grid to be easily damaged.
Therefore, compared with the main grid silver paste of the P-type secondary printing main grid, the main grid silver paste of the TOPCO front electrode has low corrosiveness to the front silicon nitride film under the condition of wide firing temperature, so that the battery has higher open voltage and lower J0 MATEL, and the battery efficiency is improved.
Disclosure of Invention
In order to solve the problems, the first aspect of the invention provides a crystalline silicon solar TOPCON battery piece front electrode main grid silver paste, which at least comprises 82-88% of spherical silver powder, 1-2% of glass powder and 10-17% of organic binder by weight percent; the particle size distribution D50 of the spherical silver powder is 0.55-0.7 mu m and the tap density is 5.5-6.5g/cm by the test of a laser particle size distribution instrument 3 。
At present, the front fine grid silver paste of the solar cell is usually used with D50 of 1-2 mu m and tap density of 5.5-6.5g/cm 3 The silver powder of (C) is usually used with a D50 of 0.4-0.8 μm and a tap density of 2.5-4.5g/cm 3 The silver powder of the main grid silver paste is usually selected from the front fine grid silver paste silver powder, the back silver paste silver powder or the combination thereof, however, the electrical performance is inconsistent, each has advantages and disadvantages, and better tensile force value and battery efficiency can not be obtained at the same time, and the applicant adopts the D50 of 0.55-0.7 mu m and the tap density of 5.5-6.5g/cm 3 The spherical silver powder not only integrates the advantages of the front fine grid silver paste silver powder and the back silver paste silver powder, but also has better wetting dispersibility and printability, and improves the conductivity of the electrode. And the D50 particle size is too large, so that silver particles are betweenThe contact probability of the silver particles is reduced, so that the space between the silver particles may be replaced by other components, resulting in a reduction in photoelectric efficiency, and also resulting in a reduction in tensile force value, while the D50 particle size is smaller, and the agglomeration is easily generated during sintering, resulting in poor dispersion.
In one embodiment, the primary grid silver paste comprises at least 86-88% spherical silver powder, 1-1.5% glass frit, and 11-13% organic binder by weight.
In a preferred embodiment, the spherical silver powder further satisfies at least one of the following conditions;
a, testing the particle size distribution D10 to be 0.1-0.35 mu m through a laser particle size distribution instrument;
b, the particle size distribution D90 is 1-1.5 μm through the measurement of a laser particle size distribution instrument.
The size distribution of the silver powder particles has a great relationship with the conductive properties of the silver paste, and it is further preferred that the spherical silver powder has a particle size distribution D10 of 0.1 to 0.35 μm, for example, 0.1 μm,0.12 μm,0.15 μm,0.18 μm,0.2 μm,0.25 μm,0.28 μm,0.3 μm,0.35 μm, as measured by a laser particle size distribution meter. Further preferably, the spherical silver powder has a particle size distribution D90 of 1 to 1.5 μm, for example, 1 μm,1.2,1.5 μm, as measured by a laser particle size distribution analyzer. By using the silver powder with the particle size distribution, the occurrence of agglomeration is further avoided, the same tap density is high, the contact property between silver powder particles is high, the silver film after sintering is compact, the shrinkage rate is reduced, the occurrence of pinholes and other holes on the silver film is avoided, and the photoelectric efficiency is improved.
The traditional main grid silver paste generally uses glass powder containing Mn and Cu as an inorganic binder, has good pulling-out force and strong corrosiveness, and is easy to damage a film layer in the TOPCON main grid. In one embodiment, the glass frit comprises at least the elements and/or oxides of the following components in parts by weight: 25-50% Pb,10-25% Si,5-15% Ti,0-15% Bi,3-10% B,0-5% Mg,0-8% W,0-5% Ca,0-3% Zn,0-5% Ba, but no Mn or Cu. The problem that the film layer is easily damaged due to the fact that glass powder containing Mn and Cu is used as an inorganic binder is avoided.
In order to improve the pull-out force after sintering of silver paste using Mn, cu-free glass frit, it is preferable that the softening point of the glass frit is 500-650 ℃, for example 500 ℃,550 ℃,600 ℃,650 ℃. The glass powder with the softening point can be mutually matched with the high-activity spherical silver powder in the application, the silver powder is fully soaked, the surface spreadability of the silver powder and the substrate is improved, and meanwhile, electrons can move through tunnel effect.
Preferably, the glass frit has a particle size of 0.5-2.5 μm, for example 0.5 μm,0.8 μm,1 μm,1.5 μm,2 μm,2.5 μm. The particle size of glass powder is too big, leads to being low with the complex degree of silver granule in this application, unable faster moist silver powder, leads to the linear continuity of silver film poor, influences the continuous spreadability of silver powder at the substrate, and the particle size is too little, probably because great appeal between the glass powder granule, influences the wettability of silver granule equally, influences the electric property.
The glass powder can be purchased or self-made, and the self-making method is not particularly limited, and a person skilled in the art can make routine selections.
In one embodiment, the method of preparing the glass frit includes: and after uniformly mixing the raw materials of the glass powder, smelting at 800-1000 ℃ until glass liquid is clear and transparent, quenching and ball milling to obtain the glass powder.
In order to improve fluidity of the silver paste, an organic binder needs to be added. In one embodiment, the organic binder includes, in parts by weight, 5 to 20 parts of a polymeric resin, 70 to 90 parts of a solvent, 0 to 8 parts of a dispersant, and 0 to 8 parts of a thixotropic agent.
Preferably, the polymer resin is selected from one or more of acrylic resin, polyurethane, epoxy resin, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, rosin, hydrogenated rosin tetra amyl alcohol ester and polyamide, preferably ethyl cellulose. The use of the organic adhesive containing 5-20 parts of the polymer resin in the application increases the printability and leads to smoother printed lines.
Preferably, the solvent is selected from one or more of DBE, alcohol ester 12, butyl carbitol acetate, terpineol, aliphatic hydrocarbon. Further preferred are DBE, alcohol ester 12, butyl carbitol acetate, in a weight ratio of 1: (0.5-1.5): (2-4): (2-4), preferably in a weight ratio of 1:1:3:3. The applicant found that the above weight ratio was 1: (0.5-1.5): (2-4): the DBE, the alcohol ester 12, the butyl carbitol and the butyl carbitol acetate in the (2-4) are taken as solvents, so that the high polymer resin can be effectively dissolved, and in addition, the high-activity spherical silver powder and the glass powder are combined, so that the carbonization is complete in the sintering process, and the decomposition products can be volatilized in time without affecting the distribution of silver particles.
In a preferred embodiment, the dispersant is an aliphatic amide-based dispersant, and more preferably a dispersant Dumeen TDO, and the applicant has found that when the dispersant is an aliphatic amide-based dispersant, the micro-flatness of the film is further reduced, and the applicant believes that it is possible that the double long chain structure promotes leveling of the solid particles, reducing the roughness of the film.
The thixotropic agent herein is not particularly limited and includes, but is not limited to, hydrogenated castor oil, polyamide wax, fumed silica, bentonite, polyethylene wax, and the like.
The invention provides a preparation method of a crystal silicon solar TOPCO battery piece front electrode main grid silver paste, which comprises the following steps: mixing spherical silver powder, glass powder and organic binder, stirring, grinding to fineness of less than 12 μm, and filtering with 200-500 mesh filter cloth.
In the method for preparing silver paste of the present application, the manner of stirring is not particularly limited, and includes, but is not limited to, dispersing using a high-speed dispersant, stirring using a planetary stirrer, and the like.
Compared with the prior art, the invention has the following beneficial effects:
the application provides a crystalline silicon solar TOPCO battery piece front electrode main grid silver paste, particle size distribution, tap density and 538 ℃ loss of weight condition through regulation and control spherical silver powder, sintering activity has been greatly improved, simultaneously, the need of adding Mn, cu element in traditional glass powder has been abandoned in this application, the sintering activity of glass powder has been reduced, the damage of paste to TOPCO battery piece front rete has the wide sintering temperature at 740~820 ℃, in addition, this glass powder can have better synergism with spherical silver powder in this application for electrode pull-out force is higher than 2N after sintering, detect its electrode part and appear bright and white through photoluminescence tester.
Drawings
FIG. 1 is a graph of electrode brightness obtained using the silver paste of example 1;
FIG. 2 is a graph of electrode brightness obtained using the silver paste of example 2;
FIG. 3 is a graph of electrode brightness obtained using the silver paste of example 5.
Detailed Description
Examples
Examples 1 to 5
The main grid silver paste of the front electrode of the crystalline silicon solar TOPCO battery piece comprises the following components in parts by weight in table 1.
TABLE 1
Wherein, the glass powder 1 is 45 percent Pb,15 percent Si,5 percent Ti,15 percent Bi,3 percent B,3 percent Mg,6 percent W,5 percent Ca,3 percent Zn, and the grain diameter is 0.5-2.5 mu m.
Glass frit 2 conventional glass frit containing manganese and copper is commercially available.
Spherical silver powder 1: the particle size distribution D50 is 0.6 μm, D10 is 0.3 μm, D90 is 1.5 μm, and tap density is 6.5g/cm 3 。
Spherical silver powder 2: the particle size distribution D50 is 1.5 μm, D10 is 0.9 μm, D90 is 2.5 μm, and tap density is 6.5g/cm 3 。
Spherical silver powder 3: the particle size distribution D50 is 0.4 μm, D10 is 0.19 μm, D90 is 0.87 μm and tap density is 4 g/cm 3 。
The preparation methods of the glass powder 1 and the glass powder 2 are as follows: and after uniformly mixing the raw materials of the glass powder, smelting at 900 ℃ for 2 hours until the glass liquid is clear and transparent, quenching, ball milling and drying to obtain the glass powder.
The composition of the organic binder in weight percent is shown in table 2.
TABLE 2
The preparation method of the organic adhesive comprises the following steps: the raw materials in Table 2 were weighed, mixed, heated in an oil bath at 80℃and stirred with a stirring paddle for dissolution for 2 hours until the materials were completely miscible with the organic binder.
The preparation method of the main grid silver paste comprises the following steps: the raw materials in table 1 are respectively and correspondingly weighed, mixed, stirred by a stirrer for 30 minutes until the materials are uniform and wet, ground by a three-roller machine for 5 times, so as to obtain slurry with good dispersibility, the FOG scraper fineness gauge is used for testing the slurry with the fineness of less than 7 mu m, and then 400-mesh filter cloth is used for filtering the slurry.
Performance evaluation
Silver pastes of examples 1-5 were printed on 100-sheet resistance N-TOPCON single crystal 166 size silicon wafers, with the printer being a BACCINI solar cell printing system. The main grid adopts 9BB customized graph screen printing, and the foundation D is main grid silver paste purchased in the market. The sintering adopts a CT sintering furnace, and the peak temperature is 760-800 ℃. The damage condition of the silver paste of the main gate electrode to the film layer of the battery piece is detected by adopting a photoluminescence tester, the conductivity of the electrode is detected by adopting a KJ1065D-B peel strength tester, the pull-off force of the electrode is detected by adopting a PL score of 1-10 minutes, the higher the score is, the brighter and whiter the surface of the electrode is, and the result is shown in Table 3. Wherein Uoc in table 3: an open circuit voltage; isc: breaking the current; rs: a series resistor; FF: a fill factor; ncell: conversion efficiency.
TABLE 3 Table 3
The brightness of the electrodes obtained by using the silver pastes of example 1, example 2 and example 5 are shown in fig. 1-3, respectively, and the brightness of the electrodes is shown in fig. 1; fig. 2 shows that the electrodes have no significant effect, and fig. 3 shows that the electrodes are blackened.
Claims (2)
1. The front electrode main grid silver paste of the crystalline silicon solar TOPCO battery piece is characterized by at least comprising 82-88% of spherical silver powder, 1-2% of glass powder and 10-17% of organic adhesive by weight percent; the particle size distribution D50 of the spherical silver powder is 0.55-0.7 mu m and the tap density is 5.5-6.5g/cm by the test of a laser particle size distribution instrument 3 The method comprises the steps of carrying out a first treatment on the surface of the The particle size distribution D10 of the spherical silver powder is 0.1-0.35 mu m through the measurement of a laser particle size distribution instrument, and the particle size distribution D90 of the spherical silver powder is 1-1.5 mu m through the measurement of the laser particle size distribution instrument; the glass powder at least comprises the following simple substances and/or oxides in percentage by weight: 25-50% of Pb,10-25% of Si,5-15% of Ti,0-15% of Bi,3-10% of B,0-5% of Mg,0-8% of W,0-5% of Ca,0-3% of Zn and 0-5% of Ba, but does not contain Mn and Cu; the softening point of the glass powder is 500-650 ℃; the particle size of the glass powder is 0.5-2.5 mu m; the organic adhesive comprises, by weight, 5-20 parts of high polymer resin, 70-90 parts of solvent, 0-8 parts of dispersing agent and 0-8 parts of thixotropic agent; the solvent is one or more selected from DBE, alcohol ester 12, butyl carbitol acetate, terpineol and aliphatic hydrocarbon; the solvent comprises the following components in percentage by weight: (0.5-1.5): (2-4): DBE, alcohol ester 12, butyl carbitol acetate of (2-4); the dispersing agent is an aliphatic amide dispersing agent.
2. A method for preparing the main grid silver paste of the front electrode of the crystalline silicon solar TOPCO battery piece according to claim 1, which is characterized by comprising the following steps: mixing spherical silver powder, glass powder and organic binder, stirring, grinding to fineness of less than 12 μm, and filtering with 200-500 mesh filter cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111669055.8A CN114360768B (en) | 2021-12-31 | 2021-12-31 | Main grid silver paste for front electrode of crystalline silicon solar TOPCO battery piece and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111669055.8A CN114360768B (en) | 2021-12-31 | 2021-12-31 | Main grid silver paste for front electrode of crystalline silicon solar TOPCO battery piece and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114360768A CN114360768A (en) | 2022-04-15 |
| CN114360768B true CN114360768B (en) | 2024-01-05 |
Family
ID=81104781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111669055.8A Active CN114360768B (en) | 2021-12-31 | 2021-12-31 | Main grid silver paste for front electrode of crystalline silicon solar TOPCO battery piece and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114360768B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150131937A (en) * | 2014-05-16 | 2015-11-25 | 덕산하이메탈(주) | Silver Paste Composition and Solar Cell using the same |
| JP2019052054A (en) * | 2017-09-14 | 2019-04-04 | Ｄｏｗａエレクトロニクス株式会社 | Silver coated tin tellurium glass powder, manufacturing method therefor, and conductive paste |
| CN110504070A (en) * | 2019-09-30 | 2019-11-26 | 无锡帝科电子材料股份有限公司 | Electrocondution slurry, preparation method and application, electrode of solar battery and solar battery comprising it |
| CN110619971A (en) * | 2019-09-09 | 2019-12-27 | 江苏正能电子科技有限公司 | Formula and preparation method of high-tension front silver paste suitable for high-tellurium glass |
| CN111564235A (en) * | 2020-06-02 | 2020-08-21 | 佛山市瑞纳新材科技有限公司 | Crystalline silicon solar cell, front main grid electrode silver paste and preparation method thereof |
| CN113161036A (en) * | 2021-04-28 | 2021-07-23 | 佛山市顺德区百锐新电子材料有限公司 | Anti-adhesion and anti-vulcanization surface electrode silver paste and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004119692A (en) * | 2002-09-26 | 2004-04-15 | Koa Corp | Resistor composition and resistor |
-
2021
- 2021-12-31 CN CN202111669055.8A patent/CN114360768B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150131937A (en) * | 2014-05-16 | 2015-11-25 | 덕산하이메탈(주) | Silver Paste Composition and Solar Cell using the same |
| JP2019052054A (en) * | 2017-09-14 | 2019-04-04 | Ｄｏｗａエレクトロニクス株式会社 | Silver coated tin tellurium glass powder, manufacturing method therefor, and conductive paste |
| CN110619971A (en) * | 2019-09-09 | 2019-12-27 | 江苏正能电子科技有限公司 | Formula and preparation method of high-tension front silver paste suitable for high-tellurium glass |
| CN110504070A (en) * | 2019-09-30 | 2019-11-26 | 无锡帝科电子材料股份有限公司 | Electrocondution slurry, preparation method and application, electrode of solar battery and solar battery comprising it |
| CN111564235A (en) * | 2020-06-02 | 2020-08-21 | 佛山市瑞纳新材科技有限公司 | Crystalline silicon solar cell, front main grid electrode silver paste and preparation method thereof |
| CN113161036A (en) * | 2021-04-28 | 2021-07-23 | 佛山市顺德区百锐新电子材料有限公司 | Anti-adhesion and anti-vulcanization surface electrode silver paste and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114360768A (en) | 2022-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107746184B (en) | Glass powder composition, conductive silver paste containing glass powder composition and preparation method of conductive silver paste | |
| JP2014510990A (en) | Conductive paste composition and solar cell electrodes and contacts formed therefrom | |
| CN110364286B (en) | Single-crystal double-sided PERC battery back electrode silver paste and preparation method thereof | |
| CN109903885B (en) | Conductive paste, application thereof, solar cell electrode and solar cell | |
| CN114315159B (en) | Glass powder for TOPCON battery main gate electrode silver paste, and preparation method and application thereof | |
| TWI711594B (en) | Electrode paste for solar cell's electrode and solar cell using the same | |
| CN111302638B (en) | Glass powder composition, conductive silver paste containing glass powder composition and solar cell | |
| JP2017092251A (en) | Conductive composition | |
| CN110648781B (en) | Main grid front silver paste suitable for step-by-step screen printing | |
| CN106531282B (en) | Photovoltaic solar cell conductive silver paste | |
| CN114360767A (en) | Solar cell positive electrode silver paste with excellent printing performance and preparation method thereof | |
| CN115497662A (en) | Silicon solar cell front electrode slurry and preparation method thereof | |
| CN113362983B (en) | Conductive paste, solar cell electrode, manufacturing method of solar cell electrode and solar cell | |
| CN113488223B (en) | Solar cell conductive silver paste without silicone oil and application thereof | |
| CN114360768B (en) | Main grid silver paste for front electrode of crystalline silicon solar TOPCO battery piece and preparation method thereof | |
| KR102152840B1 (en) | Electrode Paste For Solar Cell's Electrode And Solar Cell using the same | |
| KR102152836B1 (en) | Electrode Paste For Solar Cell's Electrode And Solar Cell using the same | |
| CN114360765A (en) | Silver paste suitable for high-temperature sintering of PERC battery piece back electrode and preparation method thereof | |
| WO2023272655A1 (en) | Conductive paste, solar cell electrode and manufacturing method therefor, and solar cell | |
| CN111524639B (en) | Electrode silver paste, preparation method and N-type crystalline silicon solar cell | |
| TWI716760B (en) | Conductive paste for solar cell's electrode and solar cell using the same | |
| TWI364847B (en) | An electroconductive paste for solar cell | |
| CN113896424A (en) | Glass powder for silver paste on back of PERC crystalline silicon solar cell and preparation method | |
| CN110337726B (en) | Conductive paste for solar cell electrode and solar cell manufactured using the same | |
| WO2012067463A2 (en) | Silver paste composition for forming an electrode, and silicon solar cell using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |