CN110176325A - A kind of low-temperature bake heterojunction solar battery conductive silver paste and preparation method thereof - Google Patents
A kind of low-temperature bake heterojunction solar battery conductive silver paste and preparation method thereof Download PDFInfo
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- CN110176325A CN110176325A CN201910498911.4A CN201910498911A CN110176325A CN 110176325 A CN110176325 A CN 110176325A CN 201910498911 A CN201910498911 A CN 201910498911A CN 110176325 A CN110176325 A CN 110176325A
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 24
- 229920002521 macromolecule Polymers 0.000 claims abstract description 21
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 229910052709 silver Inorganic materials 0.000 claims abstract description 17
- 239000004332 silver Substances 0.000 claims abstract description 17
- 239000012948 isocyanate Substances 0.000 claims abstract description 12
- 238000009736 wetting Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000004593 Epoxy Substances 0.000 claims description 17
- 239000003822 epoxy resin Substances 0.000 claims description 13
- 229920000647 polyepoxide Polymers 0.000 claims description 13
- 239000003960 organic solvent Substances 0.000 claims description 10
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 3
- AYLRODJJLADBOB-QMMMGPOBSA-N methyl (2s)-2,6-diisocyanatohexanoate Chemical compound COC(=O)[C@@H](N=C=O)CCCCN=C=O AYLRODJJLADBOB-QMMMGPOBSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 2
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims description 2
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 claims description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 2
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- DGTNSSLYPYDJGL-UHFFFAOYSA-N phenyl isocyanate Chemical compound O=C=NC1=CC=CC=C1 DGTNSSLYPYDJGL-UHFFFAOYSA-N 0.000 claims description 2
- 239000011297 pine tar Substances 0.000 claims description 2
- 229940068124 pine tar Drugs 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 241001614291 Anoplistes Species 0.000 claims 1
- 239000005058 Isophorone diisocyanate Substances 0.000 claims 1
- 235000009508 confectionery Nutrition 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 239000004519 grease Substances 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 238000007639 printing Methods 0.000 abstract description 5
- 238000005538 encapsulation Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 5
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- COTZVJGHVRNXLY-UHFFFAOYSA-N 1,1-diisocyanatoheptane Chemical compound CCCCCCC(N=C=O)N=C=O COTZVJGHVRNXLY-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 1
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
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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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Conductive Materials (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention relates to a kind of low-temperature bake heterojunction solar battery conductive silver paste and preparation method thereof, silver paste is prepared by every 100 parts of mass fraction by 85-92 parts of combination silver powder, 6-12 parts of macromolecule resin carrier, 1.5-2.5 parts of Isocyanates curing agent and 0.2-0.6 parts of wetting dispersing agent；Combination silver powder is made of spherical silver powder and flake silver powder；The average grain diameter of spherical silver powder is 0.05 μm~3 μm；The average grain diameter of flake silver powder is 1 μm~3 μm.Preparation method: macromolecule resin carrier is prepared；Prepare silver paste；Filtering, encapsulation.A kind of low-temperature bake heterojunction solar battery conductive silver paste of the invention and preparation method thereof, preparation method design is easy rationally, the properties such as electric conductivity, printing, the pulling force of manufactured low temperature baking heterojunction solar battery conductive silver paste are superior, meet market mainstream heterojunction solar battery silk-screen grid requirement.
Description
Technical field
The present invention relates to silver paste of solar cells technical fields, more particularly to a kind of low-temperature bake heterojunction solar electricity
Pond conductive silver paste and preparation method thereof.
Background technique
Global photovoltaic market enters the epoch of high speed development, and efficiently the product of drop originally increasingly becomes substantive markets and capital
The ultimate aim chased, and realize the trend of the times of cheap internet access.PERC(Passivated Emitter and Rear
Cell), i.e. passivation emitter and back side battery technology battery already becomes main product currently on the market, and hetero-junctions, i.e. HIT
(Heterojunction with Intrinsic Thin Layer) battery, be otherwise known as HJT or SHJ (Silicon
Heterojunction solar cell), then it can become the photovoltaic products or an important skill of the mainstream of future update type
Art arm product.Substrate is usually made with N-shaped crystalline silicon, the amorphous silicon of broad-band gap makees emitter, which has double-sided symmetrical knot
Structure, n-type silicon substrate two sides two layers of thin intrinsic amorphous silicon layer, positive one layer of P-type non-crystalline silicon emitter layer, one layer of back side N-shaped amorphous
Silicon fiml back surface field；Transparent conductive oxide TCO (Transparent is deposited with sputtering method on the thin amorphous silicon layer of two sides
Conductive Oxide) film, finally prepare conductive grid.
Due to the special construction of HIT battery, it is contemplated that the factors such as electric conductivity, printing, pulling force of silver paste, high temperature sintering slurry
Material is no longer applicable in, because high temperature can cause transparent conductive oxide greatly to damage, it is therefore desirable to which low-temperature bake makes slurry
Ohmic contact is formed with HIT battery, this just proposes high requirement to low-temperature bake type slurry, and temperature will be lower than 220 DEG C,
Under this cryogenic conditions, not no metallization processes of the melting of glass powder and silver powder, only realized by organic phase silver powder with
Binding force between silver powder, the adhesive force between slurry and silicon chip substrate, and to play the role of collecting carrier.
Summary of the invention
The present invention provides a kind of low-temperature bake heterojunction solar battery conductive silver paste and preparation method thereof, preparation methods
Design is easy rationally, and it is each that made low temperature bakes electric conductivity, printing, pulling force of heterojunction solar battery conductive silver paste etc.
Item superior performance, is able to satisfy market mainstream heterojunction solar battery silk-screen grid requirement.
A kind of low-temperature bake heterojunction solar battery conductive silver paste, by every 100 parts of mass fraction by 85-92 parts of combination
Silver powder, 6-12 parts of macromolecule resin carrier, 1.5-2.5 parts of Isocyanates curing agent and 0.2-0.6 parts of wetting and dispersing
Agent is prepared；Wherein, combination silver powder is made of spherical silver powder and flake silver powder；The average grain diameter of the spherical silver powder is 0.05
μm~3 μm；The average grain diameter of the flake silver powder is 1 μm~3 μm.
The surface of one or both of the spherical silver powder and flake silver powder is coated with one or more dispersing agents；It is described
Dispersing agent is selected from the dispersing agent based on fatty acid, amine, alcohol, mercaptan and polymer.
The Isocyanates curing agent includes but is not limited to phenylisocyanate, 2,4- toluene di-isocyanate(TDI), 4, and 4 ',
4 "-triphenylmethane triisocyanate, isophorone diisocyanate (IPDI), methyl diphenylene diisocyanate (MDI), two rings
Hexyl methane diisocyanate (HMDI), hexamethylene diisocyanate (HDI), one in lysine diisocyanate (LDI)
Kind or in which the mixture of several arbitrary proportions combination.
The macromolecule resin carrier is by mass percentage by the organic of the modified epoxy of 40-60% and 40-60%
Solvent is mixed with.
The modified epoxy includes but is not limited to solid propenoic acid modified epoxy, glycidyl ether modified epoxy
Resin, ethylene oxidic ester modified epoxy, glycidol amine-modified epoxy resin, polyester modified epoxy resin, aliphatic carboxylic
One of sour modified epoxy, bisphenol A modified epoxy resin or in which the mixture of several arbitrary proportions combination.
The organic solvent is organic solvent of the boiling point between 150~250 DEG C.
The organic solvent includes but is not limited to butyl carbitol acetate, butyl carbitol, diethylene glycol ether, second two
One of alcohol ether and terpinol or in which the mixture of several arbitrary proportions combination.
A kind of preparation method of low-temperature bake heterojunction solar battery conductive silver paste, specifically carries out according to the following steps
:
One, it prepares macromolecule resin carrier: the modified epoxy of 40-60% being taken to be added to 40- by mass percentage
Progress constant temperature, which is stirred to modified epoxy, in 60% organic solvent, after being heated to 80-100 DEG C sufficiently dissolves, and then filters
Impurity and the incomplete resin of dissolution are removed, the macromolecule resin carrier of low viscosity is obtained；
Two, it prepares silver paste: taking the combination silver powder, the 6- that are made of spherical silver powder and flake silver powder of 85-92 by mass fraction
The macromolecule resin carrier that 12 parts of the step of one are prepared is added in double planetary mixer, starting revolution agitating paddle and rotation point
Head is dissipated, is mixed 20-40 minutes；Add 1.5-2.5 parts of Isocyanates curing agent and 0.2-0.6 parts of wetting dispersing agent into
Row mixing, removes bubble after vacuumizing, obtain being uniformly dispersed viscosity 200-400pa.s silver paste；
Three, the silver paste that step 2 is prepared is filtered using the stainless steel cloth of 500 mesh or 600 mesh, to filtering
Silver paste afterwards is packaged to arrive low-temperature bake heterojunction solar battery conductive silver paste.
Filtering in the step 1 uses 400 mesh stainless steel wire net filtrations.
Advantages of the present invention: a kind of low-temperature bake heterojunction solar battery conductive silver paste of the invention and its preparation side
Method, preparation method design is easy rationally, and made low temperature bakes the electric conductivity of heterojunction solar battery conductive silver paste, printing
The properties such as property, pulling force are superior, are able to satisfy market mainstream heterojunction solar battery silk-screen grid requirement.
Specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be described in further detail, the reality
It applies example for explaining only the invention, protection scope of the present invention is not constituted and limited.
Embodiment one
A kind of low-temperature bake heterojunction solar battery conductive silver paste, by every 100 parts of mass fraction by 90.9 parts of combination
Silver powder, 6 parts of macromolecule resin carrier, 2.5 parts of isophorone diisocyanate (IPDI) and 0.6 part of wetting dispersing agent system
It is standby to form；Wherein, combination silver powder is made of 40.9 parts of spherical silver powder and 50 parts of flake silver powder；The partial size of the spherical silver powder
0.05-2.2 μm of distribution,；1.5-2.5 μm of the particle size distribution range of the flake silver powder；The macromolecule resin carrier is pressed
Mass percent by 30% acrylic modified epoxy resin, 30% glycidyl ether modified epoxy resin and 40% diethyl
Glycol ether solvent is mixed with.
Embodiment two
A kind of low-temperature bake heterojunction solar battery conductive silver paste, it is silver-colored by 85 parts of combination by every 100 parts of mass fraction
Powder, 12 parts of macromolecule resin carrier, 2.4 parts of hexamethylene diisocyanate (HDI) and the preparation of 0.6 part of wetting dispersing agent
It forms；Wherein, combination silver powder is made of 40 parts of spherical silver powder and 45 parts of flake silver powder；The particle diameter distribution of the spherical silver powder
0.06-2.0 μm of range,；1.8-2.3 μm of the particle size distribution range of the flake silver powder；The macromolecule resin carrier presses quality
Percentage is molten by 20% acrylic modified epoxy resin, 20% bisphenol A modified epoxy resin and 60% ethylene glycol ethyl ether
Agent is mixed with.
Embodiment three
A kind of low-temperature bake heterojunction solar battery conductive silver paste, it is silver-colored by 90 parts of combination by every 100 parts of mass fraction
Powder, 7.6 parts of macromolecule resin carrier, 2 parts of 2,4- toluene di-isocyanate(TDI) and 0.4 part of wetting dispersing agent are prepared；
Wherein, combination silver powder is made of 45 parts of spherical silver powder and 45 parts of flake silver powder；The particle size distribution range of the spherical silver powder
0.08-1.9 μm,；1.4-2.8 μm of the particle size distribution range of the flake silver powder；The macromolecule resin carrier presses quality percentage
Than being mixed by 25% aliphatic carboxylic acid modified epoxy, 25% bisphenol A modified epoxy resin and 50% pine tar alcoholic solvent
It is prepared.
The low-temperature bake heterojunction solar battery conductive silver paste of above embodiments, prepares according to the following steps:
One, it prepares macromolecule resin carrier: taking modified epoxy to be added in organic solvent by mass percentage, heat
And control the rear progress constant temperature within the scope of 85-88 DEG C and stir to modified epoxy and sufficiently dissolve, it is then stainless using 400 purposes
Steel wire filtering removal impurity and the incomplete resin of dissolution, obtain the macromolecule resin carrier of low viscosity；
Two, it prepares silver paste: taking the combination silver powder being made of spherical silver powder and flake silver powder, step 1 to prepare by mass fraction
Obtained macromolecule resin carrier is added in double planetary mixer, and starting revolution agitating paddle and rotation dispersing head mix 25 minutes；
It adds Isocyanates curing agent and wetting dispersing agent is mixed, remove bubble after vacuumizing, obtain the viscosity that is uniformly dispersed
In the silver paste of 200-400pa.s；
Three, the silver paste that step 2 is prepared is filtered using the stainless steel cloth of 500 mesh or 600 mesh, to filtering
Silver paste afterwards is packaged to arrive low-temperature bake heterojunction solar battery conductive silver paste.
The concrete content of each component of above-described embodiment and the low-temperature bake heterojunction solar battery conductive silver after preparation
The performance of slurry is as shown in the table:
By upper table, the conduction of the low-temperature bake heterojunction solar battery conductive silver paste of available above-described embodiment
The properties such as property, printing, pulling force are superior, are able to satisfy market mainstream heterojunction solar battery silk-screen grid requirement.
The low-temperature bake heterojunction solar battery conductive silver paste of above embodiments, can be by the shape of conductive silver powder in slurry
Optimize with aspect ratio, so that being capable of forming smaller resistivity, it can be achieved that in 200 DEG C or lower low-temperature bake.
In the low-temperature bake heterojunction solar battery conductive silver paste of above embodiments, flake silver powder is increasing resistivity side
Face is advantageous, because flake silver powder and the contact area of spherical silver powder mixing are greater than the contact surface that spherical silver powder is used alone
Product；The combination of spherical silver powder and other shapes silver powder is also this principle；If flake silver powder is undersized (micro- less than 1
Rice), then the resistivity of slurry can become larger, if oversized (more than 3 microns) of flake silver powder, the impressionability meeting of slurry
Decline；Nanometer spherical silver powder of those in spherical silver powder (50nm to 3 μm) smaller in dimension than 100 nanometers is that have reduction maturing temperature
's；Spherical silver powder is conducive to the dispersibility of slurry and is conducive to fill the gap between flake silver powder, to reduce slurry shape
At gap, so that slurry is shunk in the reduction of roasting, voidage is reduced, therefore obtain high resistivity.
Above-described embodiment should not in any way limit the present invention, all to be obtained by the way of equivalent replacement or equivalency transform
Technical solution fall within the scope of protection of the present invention.
Claims (10)
1. a kind of low-temperature bake heterojunction solar battery conductive silver paste, it is characterised in that: by every 100 parts of mass fraction by 85-
92 parts of combination silver powder, 6-12 parts of macromolecule resin carrier, 1.5-2.5 parts of Isocyanates curing agent and 0.2-0.6 part
Wetting dispersing agent be prepared；Wherein, combination silver powder is by accounting for the spherical silver powder of the 70-90% of silver powder total amount and accounting for silver powder total amount
10-30% flake silver powder composition；The average grain diameter of the spherical silver powder is 0.05 μm~3 μm；The flake silver powder is put down
Equal partial size is 1 μm~3 μm.
2. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 1, it is characterised in that: described
The surface of one or both of spherical silver powder and flake silver powder is coated with one or more dispersing agents；The dispersing agent is selected from base
In the dispersing agent of fatty acid, amine, alcohol, mercaptan and polymer.
3. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 1, it is characterised in that: described
Isocyanates curing agent includes but is not limited to phenylisocyanate, 2,4- toluene di-isocyanate(TDI), 4,4 ', 4 "-triphenylmenthanes three
Isocyanates, isophorone diisocyanate, methyl diphenylene diisocyanate, dicyclohexyl methyl hydride diisocyanate, six Asias
One of methyl diisocyanate, lysine diisocyanate or in which the mixture of several arbitrary proportions combination.
4. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 1, it is characterised in that: described
Wetting dispersing agent is modified poly ester class active dispersing agents.
5. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 1, it is characterised in that: described
Macromolecule resin carrier is mixed with by the organic solvent of the modified epoxy of 40-60% and 40-60% by mass percentage
It forms.
6. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 5, it is characterised in that: described
Modified epoxy include but is not limited to solid propenoic acid modified epoxy, glycidyl ether modified epoxy resin, shrink it is sweet
Grease modified epoxy, glycidol amine-modified epoxy resin, polyester modified epoxy resin, aliphatic carboxylic acid modified epoxy tree
One of rouge, bisphenol A modified epoxy resin or in which the mixture of several arbitrary proportions combination.
7. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 5, it is characterised in that: described
Organic solvent is organic solvent of the boiling point between 150~250 DEG C.
8. a kind of low-temperature bake heterojunction solar battery conductive silver paste according to claim 7, it is characterised in that: described
Organic solvent includes but is not limited to butyl carbitol acetate, butyl carbitol, diethylene glycol ether, ethylene glycol ethyl ether and pine tar
One of alcohol or in which the mixture of several arbitrary proportions combination.
9. a kind of preparation method of low-temperature bake heterojunction solar battery conductive silver paste, it is characterised in that: specifically by following
What step carried out:
One, it prepares macromolecule resin carrier: the modified epoxy of 40-60% being taken to be added to 40-60%'s by mass percentage
Progress constant temperature, which is stirred to modified epoxy, in organic solvent, after being heated to 80-100 DEG C sufficiently dissolves, and then filters off removal of impurities
Matter and the incomplete resin of dissolution, obtain the macromolecule resin carrier of low viscosity；
Two, prepare silver paste: by mass fraction take 85-92 the combination silver powder being made of spherical silver powder and flake silver powder, 6-12 parts
The step of the one macromolecule resin carrier that is prepared be added in double planetary mixer, starting revolution agitating paddle and rotation dispersion
Head mixes 20-40 minutes；It adds 1.5-2.5 parts of Isocyanates curing agent and 0.2-0.6 parts of wetting dispersing agent carries out
Mixing, removes bubble after vacuumizing, obtain being uniformly dispersed viscosity 200-400pa.s silver paste；
Three, the silver paste that step 2 is prepared is filtered using the stainless steel cloth of 500 mesh or 600 mesh, to filtered
Silver paste is packaged to arrive low-temperature bake heterojunction solar battery conductive silver paste.
10. a kind of preparation method of low-temperature bake heterojunction solar battery conductive silver paste according to claim 9, special
Sign is: the filtering in the step 1 uses 400 mesh stainless steel wire net filtrations.
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| CN113035408A (en) * | 2020-03-17 | 2021-06-25 | 深圳市百柔新材料技术有限公司 | Solar cell grid line paste and preparation method thereof, and solar cell |
| CN113035408B (en) * | 2020-03-17 | 2024-02-02 | 深圳市百柔新材料技术有限公司 | Solar cell grid line slurry and preparation method thereof, and solar cell |
| WO2022199083A1 (en) * | 2021-03-24 | 2022-09-29 | 北京梦之墨科技有限公司 | Conductive paste and electronic device |
| CN113035409A (en) * | 2021-03-27 | 2021-06-25 | 苏州卡睿杰新材料科技有限公司 | Slurry capable of being rapidly cured at low temperature for heterojunction solar cell and preparation method thereof |
| CN113035409B (en) * | 2021-03-27 | 2022-04-01 | 苏州卡睿杰新材料科技有限公司 | Slurry capable of being rapidly cured at low temperature for heterojunction solar cell and preparation method thereof |
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| CN114023490B (en) * | 2021-11-03 | 2024-05-03 | 苏州晶银新材料科技有限公司 | Low-temperature conductive silver paste and heterojunction battery |
| CN114464338A (en) * | 2021-11-29 | 2022-05-10 | 无锡帝科电子材料股份有限公司 | Solar cell front conductive silver paste and preparation method thereof |
| CN114188066A (en) * | 2021-11-30 | 2022-03-15 | 苏州市贝特利高分子材料股份有限公司 | High-crystallization silver powder and low-cost heterojunction silver paste as well as preparation method and application thereof |
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| CN114864133B (en) * | 2022-05-28 | 2024-10-29 | 中船重工黄冈贵金属有限公司 | Ultralow-temperature curing silver paste for flexible transparent metal mesh conductive film and preparation method thereof |
| CN115240898A (en) * | 2022-08-01 | 2022-10-25 | 四川东树新材料有限公司 | Conductive silver paste for heterojunction battery and preparation method thereof |
| CN116525175A (en) * | 2023-05-17 | 2023-08-01 | 浙江光达电子科技有限公司 | Electrode slurry, preparation method, electrode plate and photovoltaic cell |
| CN116779213A (en) * | 2023-06-27 | 2023-09-19 | 苏州锦艺新材料科技股份有限公司 | Low-temperature sintered conductive silver paste and preparation method and application thereof |
| CN118762876A (en) * | 2024-09-05 | 2024-10-11 | 深圳市博耀科技集团有限公司 | Preparation method of silver powder and silver paste for heterojunction solar cell |
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Application publication date: 20190827 |