CN110246604A - A kind of preparation method of hachure high aspect ratio screen printing sizing agent - Google Patents
A kind of preparation method of hachure high aspect ratio screen printing sizing agent Download PDFInfo
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- CN110246604A CN110246604A CN201910321259.9A CN201910321259A CN110246604A CN 110246604 A CN110246604 A CN 110246604A CN 201910321259 A CN201910321259 A CN 201910321259A CN 110246604 A CN110246604 A CN 110246604A
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- aspect ratio
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- preparation
- screen printing
- hachure
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- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 238000007650 screen-printing Methods 0.000 title claims abstract description 30
- 238000004513 sizing Methods 0.000 title claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 61
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011521 glass Substances 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000004014 plasticizer Substances 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- -1 amido amine Chemical class 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 239000013008 thixotropic agent Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 8
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- UDSFAEKRVUSQDD-UHFFFAOYSA-N Dimethyl adipate Chemical compound COC(=O)CCCCC(=O)OC UDSFAEKRVUSQDD-UHFFFAOYSA-N 0.000 claims description 4
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- DAFHKNAQFPVRKR-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylpropanoate Chemical group CC(C)C(O)C(C)(C)COC(=O)C(C)C DAFHKNAQFPVRKR-UHFFFAOYSA-N 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 150000004982 aromatic amines Chemical class 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910021485 fumed silica Inorganic materials 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000002736 nonionic surfactant Substances 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920005862 polyol Polymers 0.000 claims description 2
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims 1
- CGKQZIULZRXRRJ-UHFFFAOYSA-N Butylone Chemical compound CCC(NC)C(=O)C1=CC=C2OCOC2=C1 CGKQZIULZRXRRJ-UHFFFAOYSA-N 0.000 claims 1
- WQPDQJCBHQPNCZ-UHFFFAOYSA-N cyclohexa-2,4-dien-1-one Chemical group O=C1CC=CC=C1 WQPDQJCBHQPNCZ-UHFFFAOYSA-N 0.000 claims 1
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 235000021419 vinegar Nutrition 0.000 claims 1
- 239000000052 vinegar Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 38
- 238000007639 printing Methods 0.000 abstract description 23
- 229910052709 silver Inorganic materials 0.000 description 20
- 239000004332 silver Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- HYIZUMWJUAITFM-UHFFFAOYSA-N 5,5-dimethylhexane-1,3-diol 2-methylpropanoic acid Chemical class C(C(C)C)(=O)O.CC(CC(CCO)O)(C)C HYIZUMWJUAITFM-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
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical class CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- 229920000136 polysorbate Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- VPJOGDPLXNTKAZ-UHFFFAOYSA-N 2-methylpropanoic acid;2,2,4-trimethylpentane-1,3-diol Chemical group CC(C)C(O)=O.CC(C)C(O)C(C)(C)CO VPJOGDPLXNTKAZ-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- 244000185238 Lophostemon confertus Species 0.000 description 1
- 235000013234 Rhus glabra Nutrition 0.000 description 1
- 235000013831 Rhus typhina Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000000370 laser capture micro-dissection Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 239000011800 void material Substances 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sustainable Development (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention, as resin system, provides a kind of preparation method of hachure high aspect ratio screen printing sizing agent using vinyl chloride-vinyl acetate resin, mixes organic carrier and glass powder, obtains glass paste；Then glass paste is added in silver powder, obtains the preparation method of hachure high aspect ratio screen printing sizing agent.Electrocondution slurry prepared by the present invention possesses good off line property, excellent plasticity, can be suitable for minimum 28 μm opening 430/13 have net netting version, while can be suitable for minimum 22 μm opening without net knot version printing, printing is excellent, and the lines aspect ratio with higher after printing.
Description
Technical field
The present invention relates to the manufacturing technology necks that one kind can be used for the conductive silver paste of silk-screen printing, especially silicon solar cell
Domain, a kind of especially a kind of electrocondution slurry for being applicable to hachure high aspect ratio, and in particular to hachure high aspect ratio silk screen
The preparation method of printing slurry.
Technical background
Silk-screen printing technique is the important process in silicon solar cell production process, and each electrode is needed using screen printing
Electrocondution slurry is printed on silicon wafer and is made after sintering process by dataller's skill.Since silk-screen printing is pile line operation, this
Slurry used in requiring keeps stable viscosity, good off line property and moulding in continuous and long-time printing
Property.
Conversion ratio is the most critical index for evaluating solar battery, and the higher the better for conversion ratio, in various raising slurries and is turned
In the scheme of rate, reducing line thickness, improving the height of lines is to improve the aspect ratio (thickness of electrode/electrode line width) of lines
The way that short circuit current is mainstream is promoted to reduce the series resistance of cell piece.More specifically, when the line thickness drop of printing
It is low, it is capable of increasing the light-receiving area of cell piece, while the elevated height of lines, the string resistance of cell piece is can reduce, guarantees electric current
Effective flowing, to promote the transformation efficiency of cell piece.
In face of above-mentioned requirements, the production firm of solar battery sheet is constantly reducing the width of thin grid when printing cells
Degree, is reduced to 28 μm from 35 μm of openings, so that 24 μm of openings.With the reduction that printing screen plate is open, the requirement to slurry is got over
Come higher.Thinner opening, it is desirable that slurry has good off line property, and network blocking phenomenon otherwise can occur, influence normally to produce；It wants
Slurry is asked to keep certain viscosity under high speed printing shearing, it is existing that too low viscosity can make the line edge of printing that diffusion occur
As influencing conversion ratio；It is required that there is slurry good plasticity to have enough height with the lines for guaranteeing printing, to reduce slurry
The series resistance of material promotes short circuit current；It also requires slurry to have certain levelability simultaneously, guarantees after finishing printing, slurry
Upper surface can automatic levelling, be not in height rise and fall the phenomenon that, to guarantee the performance of slurry.
And current electrocondution slurry can not also meet above-mentioned requirements comprehensively, mainly there is also one for slurry organic carrier system
Fixed deficiency, a large amount of slurry use the cellulose system of different series, different viscosities, lead to viscosity, the moulding of slurry
It can not be perfectly balanced between property and off line property three.In addition, in the prior art, vinyl chloride-vinyl acetate resin has been commonly used in halogen low-temperature setting
In type silver paste, the use technique of this silver paste is 150 DEG C of low-temperature bake solidifications, and the use technique of crystal silicon solar silver paste is
780 DEG C of high temperature sinterings, both silver pastes are essentially different, and low-temperature solidified silver paste can not make in manufacture of solar cells
With.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of be applicable in using vinyl chloride-vinyl acetate resin as resin system
In the electrocondution slurry and preparation method thereof of hachure high aspect ratio silk-screen printing.Electrocondution slurry prepared by the present invention possesses good
Off line property, excellent plasticity, can be suitable for the 430/13 of minimum 28 μm openings has net netting version, while can be suitable for most
It is low 22 μm opening without net knot version printing, printing is excellent, and print after lines aspect ratio with higher.
Technical scheme is as follows:
The preparation method of hachure high aspect ratio screen printing sizing agent, includes the following steps, mixes organic carrier and glass powder, obtains
To glass paste；Then glass paste is added in silver powder, obtains hachure high aspect ratio screen printing sizing agent, be used for solar-electricity
The preparation of pond front electrode.
In the present invention, silver powder, glass powder, the weight percent of organic carrier are as follows:
Silver powder 80 ~ 93%
Glass powder 0.1 ~ 5%
Organic carrier 5 ~ 18%
It is preferred:
Silver powder 85 ~ 91%
Glass powder 1.5 ~ 3.5%
Organic carrier 7 ~ 11.5%.
In the present invention, the sum of conductive phase silver powder, dosage of inorganic phase glass powder, organic phase organic carrier are 100%.
In the present invention, organic carrier is comprised the following raw materials by weight percent:
Curing agent 0.5 ~ 3%
Plasticizer 10 ~ 25%
Vinyl chloride-vinyl acetate resin 0.1 ~ 5%
Thixotropic agent 0.1 ~ 2%
Dispersing agent 0.1 ~ 5%
Levelling agent 0.1 ~ 5%
Remaining is solvent.
Each raw material dosage of above-mentioned organic carrier adds up to 100%.
Preferably, organic carrier comprises the following raw materials by weight percent:
Curing agent 1 ~ 2%
Plasticizer 18 ~ 22%
Vinyl chloride-vinyl acetate resin 2 ~ 4%
Thixotropic agent 0.2 ~ 0.8%
Dispersing agent 1 ~ 3%
Levelling agent 4 ~ 5%
Remaining is solvent.
Preferably, the D50 partial size of the silver powder is 0.8 ~ 2.5 μm, and tap density is 5.0 ~ 6.7g/ml.
Preferably, the D50 partial size of the glass powder is 0.5 ~ 2.0 μm, and Tg is 200 ~ 550 DEG C.
Preferably, the curing agent be one of fatty amine curing agent, aromatic amine curing agent, amido amine curing agent or
It is a variety of；It is furthermore preferred that the curing agent is SBN-70D, MF-B60X, MF-K60X, E402-90T, E405-80T, AE700-
100, one of A201H, TPA-B80X or a variety of.
Preferably, the levelling agent is organic silicon type levelling agent and/or acrylic ester type levelling agent.It is furthermore preferred that described
Levelling agent be BYK-378, BYK-349, BYK-333, BYK-354, BYK-3521, BYK-371, BYK-3520, TEGO-425,
One of TEGO-500, TEGO-440 TEGO-450, DC29, DC51, DC57 etc. or a variety of
Preferably, the plasticizer is polyol ester plasticizer, phosphate plasticizer, phthalate plasticizers, fatty acid
One of ester plasticiser is a variety of.
Preferably, the thixotropic agent is rilanit special, polyamide modified rilanit special, polyamide wax pulp, polyethylene
One of wax liquor, fumed silica, bentonite are a variety of.
Preferably, the dispersing agent is nonionic surfactant；More preferably polysorbas20, Tween 80, anhydrous sorbitol
One of ester, alkyl phenol polyoxyethylene ether, aliphatic amine polyoxyethylene ether are a variety of.
Preferably, the vinyl chloride-vinyl acetate resin is fat-soluble binary vinyl chloride-vinyl acetate resin, the carboxy-modified vinyl chloride-vinyl acetate resin of ternary, trihydroxylic
One of modified vinyl chloride-vinyl acetate resin is a variety of；It is furthermore preferred that the vinyl chloride-vinyl acetate resin selects MLC-20, MLC-14-40, MLC-14-
55, one of YSZ-744, (M) VAM, VMA, VMC, MAVD, MVAH, MVOH or a variety of；It is preferred that the vinyl acetate of vinyl chloride-vinyl acetate resin
Content is that 17, K value is 32-34, average molecular weight 15000.
Preferably, the solvent is 2,2,4- trimethyl -1,3- pentanediol mono isobutyrates, butyl acetic acid
One of ester, dimethyl adipate, terpinol, kerosene, mixed dibasic acid ester DBE, isophorone are a variety of, and preferably 2,2,4-
Trimethyl -1,3- pentanediol mono isobutyrate and dimethyl adipate.
In above-mentioned technical proposal, the preparation method of organic carrier is, by vinyl chloride-vinyl acetate resin, curing agent, plasticizer, levelling agent,
Dispersing agent, thixotropic agent, solvent uniformly mix, and 0.5 ~ 1h is stirred at 30 ~ 70 DEG C, obtains organic carrier.
In above-mentioned technical proposal, the preparation method of glass paste is that glass powder is added into organic carrier, by stirring,
Dispersion, three rollers, obtain glass paste；It is preferred that the fineness of glass paste is less than 5 μm, glass paste is paste.
In the present invention, the viscosity of the hachure high aspect ratio screen printing sizing agent for solar battery is 270 ~
320Pa.s, fineness is less than 5 μm.
Specific step is as follows for the preparation method of the above-mentioned hachure high aspect ratio screen printing sizing agent for solar battery:
(1) organic carrier is prepared
Vinyl chloride-vinyl acetate resin is uniformly mixed with curing agent, plasticizer, levelling agent, dispersing agent, thixotropic agent, solvent, is added at 30 ~ 70 DEG C
0.5 ~ 1h of thermal agitation forms the mixture of stable homogeneous, as prepared organic carrier；
(2) preparation of glass paste
The organic carrier prepared in step (1) is taken, a certain amount of glass powder is added thereto, after being sufficiently stirred, uses three-roller
Fineness is dispersed to less than 5 μm, and slurry shows paste, as prepared glass paste；
(3) preparation of silver paste
The glass paste in step (2) is taken, a certain amount of silver powder is added thereto, after being sufficiently mixed, is dispersed to using three-roller
Fineness obtains the hachure high aspect ratio screen printing sizing agent for solar battery less than 5 μm, and placement carries out viscosity afterwards for 24 hours
Test is 270 ~ 320Pa.s.
The present invention is beneficial to be had the technical effect that
The conventional positive silver of crystal silicon solar there are problems that not balancing between viscosity, plasticity and off line property three, work as slurry
Situations such as material viscosity is larger, and when plasticity is preferable, the off line property of slurry is bad, is easy to appear empty print and cucurbit section；Such as
Fruit reduces the viscosity of slurry, promotes the off line property of slurry, then the plasticity that will lead to slurry is bad, and lines height is insufficient, line width
The problems such as increase, the short circuit current of cell piece is too low, and conversion ratio is low.
Have in halogen silver paste in low-temperature setting (150 DEG C), commonly use vinyl chloride-vinyl acetate resin as reduction resistance and promotes solidification effect
Ingredient and add, but have no precedent vinyl chloride-vinyl acetate resin report used in crystal silicon solar batteries front side silver paste.And it is of the invention
The creative important component using vinyl chloride-vinyl acetate resin as organic carrier has high cohesion and moulding characteristic, Ke Yiwei
Lines line width is held, prevents lines from spreading and collapsing, the slurry of preparation has good off line property, replys after being sheared preferably, with touching
Change agent, levelling agent are used cooperatively, and can be guaranteed the plasticity of slurry and with certain lubricating action, are able to ascend slurry
Off line property, and guarantee that the upper surface after slurry printing is smooth.Compared with prior art, electrocondution slurry printing prepared by the present invention
Rear grid line lines have good plasticity, and improve the depth-width ratio of silver wire after sintering, and silver wire item collapses after reducing sintering
It collapses, and then reduces shared light-receiving area, improve the transformation efficiency of cell piece.
Detailed description of the invention
Fig. 1 is that embodiment prints lines figure；
Fig. 2 is that comparative example prints lines.
Specific embodiment
Below with reference to embodiment, the present invention is specifically described.
In the present embodiment, curing agent is Japanese Asahi Kasei Corporation's production, and levelling agent is the production of Bi Ke company, Germany, chlorine vinegar tree
Rouge is produced by Pan Gao Chemical Co., Ltd..Organic carrier disclosed by the invention based on vinyl chloride-vinyl acetate resin has high cohesion and moulding
Characteristic can maintain lines line width, prevent lines from spreading and collapsing, there is it in the crystal silicon sun positive silver paste of fine
Good application performance, the sun positive silver paste using vinyl chloride-vinyl acetate resin preparation have good moulding and printing characteristic, Ke Yishi
Existing fine printing.
By the positive silver paste of the embodiment of the present invention and comparative example by silk-screen printing technique silicon chip of solar cell just
Printing forms main grid and thin grid on the passivation layer of face, is sintered in ir tunnel furnace after drying, is sintered 780 DEG C of peak temperature, is higher than 700 DEG C
Time 3s, the time 7s higher than 600 DEG C.Solvent in slurry volatilizees in drying stage, other organic matters are decomposed in high temperature section to be burnt
It removes, the glass powder and silver powder melting in slurry are hardened, burn passivation layer, form good Ohmic contact with the PN junction of silicon wafer, most
Preparation forms solar battery sheet eventually.
Embodiment 1
The preparation method of hachure high aspect ratio screen printing sizing agent, includes the following steps:
(1) organic carrier is prepared
By weight, by 3 parts of VMA vinyl chloride-vinyl acetate resins, (vinyl acetate content of vinyl chloride-vinyl acetate resin is that 17, K value is 32-34, mean molecule
Measuring is 15000) 1.5 parts of SBN-70D curing agent, 20 parts of dibutyl phthalates, 5 parts of BYK-378 levelling agent, polyamide wax
0.5 part, 2 parts of Tween 80s, 2,2,4- 45 parts of trimethyl -1,3- pentanediol mono isobutyrates, 23 parts of dimethyl adipate mixing,
Heating stirring 30min under the conditions of 60 DEG C, is made homogeneous and transparent solution, that is, is configured to organic carrier；
(2) glass paste is prepared
By weight, taking D50 is 1.0 μm, and Tg point is 1 part of glass powder of 300 DEG C, the organic carrier 4.26 with step (1) preparation
After part is uniformly dispersed on dispersion machine, in three-roller upper roller to fineness 5um hereinafter, glass paste is made；
(3) silver paste is prepared
By weight, taking D50 is 1.8 μm, and tap density is 88 parts of silver powder of 5.7g/ml, the glass paste with step (2) preparation
12 parts, after being uniformly dispersed on dispersion machine, in three-roller upper roller to fineness 5um hereinafter, obtaining the filament for solar battery
High aspect ratio screen printing sizing agent；The silver paste placement prepared carries out viscosity test afterwards for 24 hours, is 297Pa.s, final silver paste
Performance data is as shown in table 1.
Comparative example 1
Using the electrocondution slurry preparation method of traditional ethyl cellulose resin, include the following steps,
(1) organic carrier is prepared
By weight, by 3 parts of ethyl cellulose N200,1.5 parts of SBN-70D curing agent, 20 parts of dibutyl phthalates, BYK-
378 5 parts of levelling agents, 0.5 part of polyamide wax, 2 parts of Tween 80s, 2,2,4- 45 parts of trimethyl -1,3- pentanediol mono isobutyrates, oneself
23 parts of acid dimethyl mixing, heating stirring 30min under the conditions of 60 DEG C are made homogeneous and transparent solution, that is, are configured to organic
Carrier；
(2) glass paste is prepared
By weight, taking D50 is 1.0 μm, and Tg point is 1 part of glass powder of 300 DEG C, the organic carrier 4.26 with step (1) preparation
After part is uniformly dispersed on dispersion machine, in three-roller upper roller to fineness 5um hereinafter, glass paste is made；
(3) silver paste is prepared
By weight, taking D50 is 1.8 μm, and tap density is 88 parts of silver powder of 5.7g/ml, the glass paste with step (2) preparation
12 parts, after being uniformly dispersed on dispersion machine, in three-roller upper roller to fineness 5um or less；The silver paste placement prepared carries out afterwards for 24 hours
Viscosity test, is 320Pa.s, and the performance data of final silver paste is as shown in table 1.
Test:
Embodiment 1 and the prepared silver paste of comparative example 1 are subjected to rheology on rheometer (anton-paar/MCR102,25 DEG C)
Test, and carry out conventional screen printing on screen process press and be fabricated to solar battery sheet, manufactured cell piece is tested in I/V
Electric performance test is carried out on instrument, and in the grid line lines situation of laser capture microdissection microscopic observation cell piece；It is commercially available to having simultaneously
Silver paste comparison；Test data is as shown in table 1.
1 performance data of table
By upper table data it is found that embodiment 1 and comparative example 1 be only between the two used in resin it is different, the present invention matches
Side is able to ascend the plasticity of slurry, and slurry is made to possess more three-dimensional full lines, specifically, the short circuit in embodiment 1
Electric current is apparently higher than comparative example, and slurry opens that pressure is also slightly higher, and final conversion ratio is obviously higher by comparative example.Pass through electronic laser
Microscope to thin grid carry out 3D scanning, it is found that the lines of embodiment are obviously fuller, line Gao Genggao, and the upper surface of lines compared with
To be smooth, line style is more preferable, sees Fig. 2 of Fig. 1 and comparison.
Electrocondution slurry prepared by the present invention possesses good off line property, and excellent plasticity has in 430-13-28 μm of routine
When printing in net netting version, off line property is good, and no broken string, lines upper limb is smooth, and line style is good.It knots at 400-16-22 μm without net
Also good printing may be implemented when printing in version, without the grid that break, line style is good, but comparative example is under the printing condition of this limit
Net can not be crossed, the thin grid void print of cell piece is serious, and the disconnected grid of EL is more.
Claims (10)
1. a kind of preparation method of hachure high aspect ratio screen printing sizing agent, includes the following steps, organic carrier and glass are mixed
Glass powder, obtains glass paste；Then glass paste is added in silver powder, obtains hachure high aspect ratio screen printing sizing agent.
2. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 1, which is characterized in that described
Silver powder, glass powder, the weight percent of organic carrier are as follows:
Silver powder 80 ~ 93%
Glass powder 0.1 ~ 5%
Organic carrier 5 ~ 18%.
3. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 2, which is characterized in that described
Silver powder, glass powder, the weight percent of organic carrier are as follows:
Silver powder 85 ~ 91%
Glass powder 1.5 ~ 3.5%
Organic carrier 7 ~ 11.5%.
4. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 1, which is characterized in that organic
Carrier comprises the following raw materials by weight percent:
Curing agent 0.5 ~ 3%
Plasticizer 10 ~ 25%
Vinyl chloride-vinyl acetate resin 0.1 ~ 5%
Thixotropic agent 0.1 ~ 2%
Dispersing agent 0.1 ~ 5%
Levelling agent 0.1 ~ 5%
Remaining is solvent.
5. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 4, which is characterized in that organic
Carrier comprises the following raw materials by weight percent:
Curing agent 1 ~ 2%
Plasticizer 18 ~ 22%
Vinyl chloride-vinyl acetate resin 2 ~ 4%
Thixotropic agent 0.2 ~ 0.8%
Dispersing agent 1 ~ 3%
Levelling agent 4 ~ 5%
Remaining is solvent.
6. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 4, which is characterized in that described solid
Agent is one of fatty amine curing agent, aromatic amine curing agent, amido amine curing agent or a variety of；The levelling agent is organic
Silicon type levelling agent and/or acrylic ester type levelling agent；The plasticizer is polyol ester plasticizer, phosphate plasticizer, adjacent benzene
One of dicarboxylic acid esters plasticizer, aliphatic ester plasticizer are a variety of；The thixotropic agent is rilanit special, polyamide modified
One of rilanit special, polyamide wax pulp, polyethylene wax liquor, fumed silica, bentonite are a variety of；The dispersion
Agent is nonionic surfactant；The solvent is 2,2,4- trimethyl -1,3- pentanediol mono isobutyrate, butyl
One of acetate, dimethyl adipate, terpinol, kerosene, mixed dibasic acid ester DBE, isophorone are a variety of.
7. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 4, which is characterized in that the chlorine
Vinegar resin is one of fat-soluble binary vinyl chloride-vinyl acetate resin, the carboxy-modified vinyl chloride-vinyl acetate resin of ternary, the modified vinyl chloride-vinyl acetate resin of trihydroxylic
Or it is a variety of.
8. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 4, which is characterized in that have airborne
The preparation method of body is uniformly to mix vinyl chloride-vinyl acetate resin, curing agent, plasticizer, levelling agent, dispersing agent, thixotropic agent, solvent,
0.5 ~ 1h is stirred at 30 ~ 70 DEG C, obtains organic carrier.
9. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 1, which is characterized in that described thin
The viscosity of lines high aspect ratio screen printing sizing agent is 270 ~ 320Pa.s, and fineness is less than 5 μm.
10. the preparation method of hachure high aspect ratio screen printing sizing agent according to claim 1, which is characterized in that described
The D50 partial size of silver powder is 0.8 ~ 2.5 μm, and tap density is 5.0 ~ 6.7g/ml；The D50 partial size of the glass powder is 0.5 ~ 2.0 μ
M, Tg are 200 ~ 550 DEG C.
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| CN111899912A (en) * | 2020-07-27 | 2020-11-06 | 上海银浆科技有限公司 | Preparation method of front silver paste for ultrahigh-speed fine line printing |
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