CN110010302A - A method of preparing PERC battery silver paste - Google Patents
A method of preparing PERC battery silver paste Download PDFInfo
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- CN110010302A CN110010302A CN201910165575.1A CN201910165575A CN110010302A CN 110010302 A CN110010302 A CN 110010302A CN 201910165575 A CN201910165575 A CN 201910165575A CN 110010302 A CN110010302 A CN 110010302A
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 54
- 239000004332 silver Substances 0.000 title claims abstract description 54
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 title claims abstract description 50
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 title claims abstract description 50
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000011521 glass Substances 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000012074 organic phase Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 37
- -1 amido amine Chemical class 0.000 claims description 16
- 239000001856 Ethyl cellulose Substances 0.000 claims description 14
- 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 claims description 14
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 14
- 229920001249 ethyl cellulose Polymers 0.000 claims description 14
- 239000004014 plasticizer Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 7
- 150000002148 esters Chemical class 0.000 claims description 7
- 229920002647 polyamide Polymers 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 239000013008 thixotropic agent Substances 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 3
- 229920000053 polysorbate 80 Polymers 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- UDSFAEKRVUSQDD-UHFFFAOYSA-N Dimethyl adipate Chemical compound COC(=O)CCCCC(=O)OC UDSFAEKRVUSQDD-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 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
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 229910021485 fumed silica Inorganic materials 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000000203 mixture 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
- JCTXKRPTIMZBJT-UHFFFAOYSA-N 2,2,4-trimethylpentane-1,3-diol Chemical group CC(C)C(O)C(C)(C)CO JCTXKRPTIMZBJT-UHFFFAOYSA-N 0.000 claims 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 claims 1
- 150000002510 isobutyric acid esters Chemical class 0.000 claims 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N o-dicarboxybenzene Natural products OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 20
- 238000002360 preparation method Methods 0.000 abstract description 16
- 238000009826 distribution Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 14
- 238000007639 printing Methods 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000002161 passivation Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 4
- 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 3
- XTBFLAYPNIPTLX-UHFFFAOYSA-N N=NC=NN.N=NC=NN.C(CCCCC(=O)O)(=O)O Chemical compound N=NC=NN.N=NC=NN.C(CCCCC(=O)O)(=O)O XTBFLAYPNIPTLX-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 230000002902 bimodal effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000009766 low-temperature sintering Methods 0.000 description 2
- 229920000136 polysorbate Polymers 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 description 1
- 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
- 101000579913 Homo sapiens Peroxisomal trans-2-enoyl-CoA reductase Proteins 0.000 description 1
- 102100027506 Peroxisomal trans-2-enoyl-CoA reductase Human genes 0.000 description 1
- 229920001213 Polysorbate 20 Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011267 electrode slurry Substances 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
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000005622 photoelectricity Effects 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
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 1
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
-
- 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
- H01L31/04—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 adapted as photovoltaic [PV] conversion devices
-
- 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
Abstract
The invention discloses a kind of methods for preparing PERC battery silver paste, include the following steps, hybrid glass powder and organic phase carrier obtain glass paste；Then silver powder is added in glass paste, obtains PERC battery silver paste；The silver powder is made of thin silver powder with raw Ag powder.The present invention provides a kind of PERC battery silver paste preparation methods for introducing grain size distribution technology.Silver paste printing performance prepared by the present invention is excellent, and possesses wider sintering process window.
Description
Technical field
The present invention relates to a kind of manufacturing technology fields of PERC silver paste, introduce silver powder grain size distribution more particularly, to one kind
Technology, the method for preparing PERC battery silver paste with good print and wide sintering process window.
Background technique
PERC battery is the solar cell of a kind of emitter and back side passivation on double surfaces.By atomic layer deposition (ALD) technology,
One layer of Al is deposited in cell piece back surface2O3, then reuse Plasma Enhanced Chemical Vapor Deposition (PECVD) (Plasma Enhanced
Chemical Vapor Deposition, PECVD) overleaf plate one layer of Si3N4Film, to Al2O3It shields；Meanwhile
This layer of Si3N4Film can also improve minority carrier life time, increase the reflection to long wave, make full use of to light, increase silicon wafer to long wave
Absorption, significantly improve open-circuit voltage and short circuit current, greatly improve cell piece efficiency.
PERC battery uses passivation emitter and back-contact cell technology, utilizes Al2O3Equal media are in cell backside shape
At passivation layer, the absorption of the long glistening light of waves of battery is not only increased, is also greatly reduced the recombination rate of cell backside carrier.Meanwhile
By the laser opening on pellumina, realizes that the point contact of metal electrode and base area connects, further reduced photoproduction current-carrying
The back surface recombination rate of son makes open-circuit voltage promote amplitude and reaches to improve the open-circuit voltage and short circuit current of battery
10~15mV.
Industry practice shows although the front side silver paste of conventional batteries is able to satisfy the basic using effect of PERC battery, but
Since sintering window is integrally biased to high temperature, low-temperature sintering window is not wide enough, damage is brought to passivation layer, to limit PERC
The performance of battery efficiency potentiality.
For PERC cell front side silver paste, in order to cooperate PERC technology to obtain higher transfer efficiency, in addition to improving
Contact performance, filament printing reduce except the traditional performances such as grid line shading-area, it is also necessary to can be superimposed double printings, distribution print
Brush, more main grid technologies etc..Meanwhile in order to help PERC battery to reduce photo attenuation effect, the positive silver of PERC is also required to possess wide
Sintering process window, can adapt to low-temperature sintering.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of PERC batteries for introducing grain size distribution technology
The preparation method of silver paste.Silver paste printing performance prepared by the present invention is excellent, and possesses wider sintering process window.The present invention will
Grain size distribution technology introduces the preparation of PERC battery silver paste, which can improve the packing efficiency of silver powder, promotes silver powder
Sintering activity, increases the sintering process window of slurry, and sintering peak temperature is lower than general 40 DEG C of existing peak temperature.
Technical scheme is as follows:
A method of PERC battery silver paste is prepared, is included the following steps, hybrid glass powder and organic phase carrier obtain glass
Glass slurry；Then silver powder is added in glass paste, obtains PERC battery silver paste, can be used for PERC solar battery, for electricity
The printing of pond silicon wafer anode, the anode as PERC solar battery；The silver powder is made of thin silver powder with raw Ag powder.
In the above-mentioned method for preparing PERC battery silver paste, the sum of silver powder, dosage of glass powder, organic phase carrier are 100%,
The weight percent of each component are as follows: silver powder 85~92%, glass powder 1~3%, organic phase carrier 7~15%.
Preferably, the silver powder matches grade technology from the different silver powder particles compounding of two kinds of particle diameter distributions to be bimodal,
In thin silver powder D50 at 0.5~0.8 μm, half-peak breadth is 0.5~0.8 μm, and the D50 of raw Ag powder is in 2.0~2.5 μm, half-peak breadth
2~3 μm；Thin silver powder, raw Ag powder tap density be 4.5~6.5g/ml；In the silver powder, the mass percent of raw Ag powder
It is 50~100%, does not include 100%, preferably 75~85%.
Preferably, the inorganic phase glass powder D50 partial size is 0.5~1.5 μm, and Tg is 150~400 DEG C.
In the present invention, organic phase carrier is made of the raw material of following weight percent: curing agent 2~5%, plasticizer 15
~30%, ethyl cellulose 5~15%, thixotropic agent 1~10%, dispersing agent 1~5%, levelling agent 3~15%, remaining is solvent.
Each raw material dosage of above-mentioned organic phase carrier adds up to 100%.
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, the curing agent are Japanese Asahi Kasei Corporation's production.
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 is one of BYK-378, BYK-349, BYK-333, BYK-354, BYK-3521, BYK-371, BYK-3520 or more
Kind, the levelling agent is the production of Bi Ke company, Germany.
Preferably, the plasticizer is polyol ester plasticizer, phosphate plasticizer, phthalate plasticizers, rouge
One of fat acid ester plasticizer 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 surfactant is nonionic surfactant；It is furthermore preferred that the surfactant is tween
20, one of Tween 80, sorbitan ester, alkyl phenol polyoxyethylene ether, aliphatic amine polyoxyethylene ether or a variety of.
Preferably, the ethyl cellulose is N-type and/or T-type ethyl cellulose；In the ethyl cellulose, ethyoxyl
Content is 45~50%.
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 and DBE, isophorone are a variety of.
In the present invention, by ethyl cellulose and curing agent, plasticizer, levelling agent, coupling agent, dispersing agent, thixotropic agent, solvent
Uniformly mixing stirs 0.5~1h at 30~70 DEG C, obtains organic phase carrier.
In the present invention, glass paste is paste, and fineness is less than 5 μm.
In the present invention, the fineness of PERC battery silver paste prepared by the present invention is less than 5 μm.
The method disclosed by the invention for preparing PERC battery silver paste, specific steps can be as follows:
(1) organic carrier is prepared
Ethyl cellulose is uniformly mixed with curing agent, plasticizer, levelling agent, coupling agent, dispersing agent, thixotropic agent, solvent,
0.5~1h of heating stirring at 30~70 DEG C forms the stable mixture of transparent and 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 machine is dispersed to fineness 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, the silver powder of a certain amount of two kinds of partial sizes is added thereto, it is fully dispersed to be dispersed machine
Afterwards, fineness is dispersed to less than 5 μm using three-roller, obtain solar PE RC battery silver paste；Placement carries out viscosity test afterwards for 24 hours,
For 270~320Pa.s.
The present invention is beneficial to be had the technical effect that
The prior art is few to be optimized specifically for PERC battery silver paste with silver powder accordingly, can not effectively be adjusted
The sintering window of slurry, the silver paste of silicon cell that a large amount of PERC cell piece producer uses or common, leads to cell piece
Sintering process window it is narrow, the light decay of cell piece is larger, influences the performance of cell piece.And the present invention draws grain size distribution technology
The preparation of PERC battery silver paste is entered, which can improve the packing efficiency of silver powder, promote the sintering activity of silver powder, increase slurry
The sintering process window of material, makes slurry be more applicable for PERC battery technology.
Detailed description of the invention
Fig. 1 is the grain size distribution of thin silver powder, raw Ag powder；
Fig. 2 is the grain size distribution after thin silver powder, raw Ag powder compounding.
Specific embodiment
In the present embodiment, curing agent is Japanese Asahi Kasei Corporation's production, and levelling agent is the production of Bi Ke company, Germany；Described part
For parts by weight.
It prepares PECR cell piece: choosing PERC silicon chip of solar cell of the back side of conventional commercial Jing Guo Passivation Treatment, make
With the PERC battery rear electrode slurry of conventional commercial, the print that the back side forms back electrode pattern is carried out using silk-screen printing technique
Brush；Back electrode pattern is dried；The PERC positive silver paste for choosing embodiment or comparative example preparation, uses screen printing
Dataller's skill is printed in the front of cell silicon chip, forms electrode pattern in the front of silicon wafer；Front electrode pattern is dried
Dry and sintering processes, temperature when drying is 300 DEG C, and temperature when sintering is 740 DEG C, obtains PERC solar battery sheet；
The cell piece prepared carries out the test of correlated performance using I-V tester.
Embodiment 1
A kind of preparation method for the PERC battery silver paste introducing silver powder grain size distribution technology, includes the following steps:
(1) organic carrier is prepared
11 parts of N22 ethyl cellulose, 5 parts of SBN-70D curing agent, 6 parts of dibutyl phthalate, BYK-378 levelling agent
12 parts, 7 parts of polyamide wax, 5 parts of Tween 80s, 2,2,4- 30 parts of trimethyl -1,3- pentanediol mono isobutyrates, adipic acid diformazan
24 parts of ester, heating dispersion 30min, is made uniform mixed liquor, that is, is configured to organic phase carrier under the conditions of 60 DEG C；
(2) glass paste is prepared
Taking D50 is 1.0 μm, and Tg point is 1 part of glass powder of 260 DEG C, is existed with 4.26 parts of the organic phase carrier of step (1) preparation
After being uniformly dispersed on dispersion machine, in three-roller upper roller to 5 μm of fineness hereinafter, glass paste is made；
(3) silver paste is prepared
Taking D50 is 0.76 μm, and half-peak breadth is 0.68 μm, and tap density is 17.6 parts of thin silver powder A of 6.0g/ml, takes D50
It is 2.43 μm, half-peak breadth is 2.43 μm, and tap density is 70.4 parts of raw Ag powder B of 5.6g/ml, the glass with step (2) preparation
12 parts of glass slurry, after being uniformly dispersed on dispersion machine, in three-roller upper roller to 5 μm of fineness hereinafter, obtaining PERC battery silver paste；
It places for 24 hours, viscosity 288Pa.s, for the performance data of final silver paste as shown in table 1, the particle diameter distribution of silver powder used is shown in Fig. 1, figure
2。
Comparative example 1
The slurry prepared using single silver powder, preparation method are included the following steps:
Prepare organic carrier
11 parts of N22 ethyl cellulose, 5 parts of SBN-70D curing agent, 6 parts of dibutyl phthalate, BYK-378 levelling agent
12 parts, 7 parts of polyamide wax, 5 parts of Tween 80s, 2,2,4- 30 parts of trimethyl -1,3- pentanediol mono isobutyrates, adipic acid diformazan
24 parts of ester, heating dispersion 30min, is made uniform mixed liquor, that is, is configured to organic phase carrier under the conditions of 60 DEG C；
Prepare glass paste
Taking D50 is 1.0 μm, and Tg point is 1 part of glass powder of 260 DEG C, is existed with 4.26 parts of the organic phase carrier of step (1) preparation
After being uniformly dispersed on dispersion machine, in three-roller upper roller to 5 μm of fineness hereinafter, glass paste is made；
Prepare silver paste
Taking D50 is 0.76 μm, and half-peak breadth is 0.68 μm, and tap density is the silver powder A:88 parts thin of 6.0g/ml；With step
(2) 12 parts of glass paste of preparation, after being uniformly dispersed on dispersion machine, in three-roller upper roller to 5 μm of fineness hereinafter, obtaining PERC
Battery silver paste；It places for 24 hours, viscosity 309Pa.s, the performance data of final silver paste is as shown in table 1.
Comparative example 2
The slurry prepared using traditional single silver powder, preparation method are included the following steps:
(1) organic carrier is prepared
11 parts of N22 ethyl cellulose, 5 parts of SBN-70D curing agent, 6 parts of dibutyl phthalate, BYK-378 levelling agent
12 parts, 7 parts of polyamide wax, Tween 80: 5 parts, 2,2,4- 30 parts of trimethyl -1,3- pentanediol mono isobutyrates, adipic acid diformazan
24 parts of ester, heating dispersion 30min, is made uniform mixed liquor, that is, is configured to organic phase carrier under the conditions of 60 DEG C；
(2) glass paste is prepared
Taking D50 is 1.0 μm, and Tg point is 1 part of glass powder of 260 DEG C, is existed with 4.26 parts of the organic phase carrier of step (1) preparation
After being uniformly dispersed on dispersion machine, in three-roller upper roller to 5 μm of fineness hereinafter, glass paste is made；
(3) silver paste is prepared
Taking D50 is 2.22 μm, and half-peak breadth is 2.91 μm, and tap density is 88 parts of silver powder C of 5.7g/ml, with step (2)
12 parts of the glass paste of preparation, after being uniformly dispersed on dispersion machine, in three-roller upper roller to 5 μm of fineness hereinafter, silver powder used
Particle diameter distribution is shown in Fig. 1；The silver paste prepared is placed for 24 hours, and viscosity 292Pa.s, the performance data of final silver paste is as shown in table 1；Together
When provide the positive silver paste of commercially available routine PERC and compare (sintering temperature when preparing front side of silicon wafer electrode is 780 DEG C).
The performance data of 1 silver paste of table
| Embodiment 1 | Comparative example 1 | Comparative example 2 | Commercially available silver paste | |
| Slurry viscosity/10rpm (Pa.s) | 288 | 309 | 292 | 358 |
| Open-circuit voltage Mv | 665.15 | 660.32 | 660.72 | 652.62 |
| Short circuit current A | 10.013 | 8.256 | 9.770 | 9.468 |
| Series resistance m Ω | 2.014 | 3.524 | 2.315 | 2.149 |
| Conversion ratio % | 22.75 | 18.95 | 20.66 | 20.98 |
As seen from the above table, embodiment 1 and comparative example only exist the difference using silver powder, the cell piece that embodiment 1 is printed
Comparative example is led on opening pressure and short circuit current, and the tightness degree between silver powder is better than comparative example, final photoelectricity turns
Rate obviously increases；In embodiment one, when silver powder A and silver powder B are 44 parts, final optoelectronic transformation efficiency is 21.36%.
Currently, the prior art is not directed to the positive silver paste of PERC, everybody is still used for common crystal silicon at present
The positive silver paste that battery uses.Since PERC battery technology needs positive silver paste to possess lower sintering temperature and wide sintering
Process window, the usual means that current each producer uses are the glass powders for using low Tg point temperature, to reduce the burning of slurry
Junction temperature, but the method will lead to the sintering of silver powder in silver paste that there are problems, will lead to silver powder sintering not exclusively, silver powder particles
It connects not close.In the present invention, reasonable grain size distribution is able to ascend the tightness degree between material, and ingredient is made to obtain low stomata
Rate promotes the sintering activity of silver powder, and especially, bimodal distribution is capable of the packing efficiency of effective improving material, promotes the property of slurry
Energy.
Claims (10)
1. a kind of method for preparing PERC battery silver paste, includes the following steps, hybrid glass powder and organic phase carrier obtain glass
Slurry；Then silver powder is added in glass paste, obtains PERC battery silver paste；The silver powder is made of thin silver powder with raw Ag powder.
2. preparing the method for PERC battery silver paste according to claim 1, which is characterized in that silver powder, glass powder, organic phase carry
The weight percent of body are as follows: silver powder 85 ~ 92%, glass powder 1 ~ 3%, organic phase carrier 7 ~ 15%.
3. preparing the method for PERC battery silver paste according to claim 1, which is characterized in that the D50 of the thin silver powder is 0.5
~ 0.8 μm, half-peak breadth is 0.5 ~ 0.8 μm, and for the D50 of raw Ag powder at 2.0 ~ 2.5 μm, half-peak breadth is 2 ~ 3 μm；Thin silver powder, raw Ag powder
Tap density is 4.5 ~ 6.5g/ml；In the silver powder, it does not include 100% that the mass percent of raw Ag powder, which is 50 ~ 100%,.
4. preparing the method for PERC battery silver paste according to claim 3, which is characterized in that in the silver powder, raw Ag powder
Mass percent is 75 ~ 85%.
5. preparing the method for PERC battery silver paste according to claim 1, which is characterized in that by ethyl cellulose and solidification
Agent, plasticizer, levelling agent, coupling agent, dispersing agent, thixotropic agent, solvent uniformly mix, and 0.5 ~ 1h is stirred at 30 ~ 70 DEG C, is obtained
Organic phase carrier.
6. preparing the method for PERC battery silver paste according to claim 5, which is characterized in that the organic phase carrier by with
It is prepared by the raw material of lower weight percent: curing agent 2 ~ 5%, plasticizer 15 ~ 30%, ethyl cellulose 5 ~ 15%, thixotropic agent 1 ~ 10%,
Dispersing agent 1 ~ 5%, levelling agent 3 ~ 15%, remaining is solvent.
7. preparing the method for PERC battery silver paste according to claim 5, which is characterized in that the curing agent is solid for fatty amine
One of agent, aromatic amine curing agent, amido amine curing agent are a variety of；The levelling agent be organic silicon type levelling agent and/
Or acrylic ester type levelling agent；The plasticizer is polyol ester plasticizer, phosphate plasticizer, phthalic acid ester plasticising
One of agent, aliphatic ester plasticizer are a variety of；The thixotropic agent be rilanit special, polyamide modified rilanit special,
One of polyamide wax pulp, polyethylene wax liquor, fumed silica, bentonite are a variety of；The surfactant is non-
Ionic surface active agent；It is furthermore preferred that the surfactant is polysorbas20, Tween 80, sorbitan ester, alkyl phenol polyoxy
One of vinethene, aliphatic amine polyoxyethylene ether are a variety of；The ethyl cellulose be N-type and/or T-type ethyl cellulose,
In the ethyl cellulose, ethoxyl content is 45 ~ 50%；The solvent is 2,2,4- trimethyl -1,3- pentanediol list isobutyric acid
Ester, butyl acetate, dimethyl adipate, terpinol, kerosene, mixed dibasic acid ester, DBE, in isophorone
It is one or more.
8. preparing the method for PERC battery silver paste according to claim 1, which is characterized in that the D50 partial size of the glass powder
It is 0.5 ~ 1.5 μm, Tg is 150 ~ 400 DEG C.
9. preparing the method for PERC battery silver paste according to claim 1, which is characterized in that the glass paste is paste,
Fineness is less than 5 μm.
10. preparing the method for PERC battery silver paste according to claim 1, which is characterized in that the PERC battery silver paste
Fineness is less than 5 μm.
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| CN113707364A (en) * | 2021-09-01 | 2021-11-26 | 江苏正能电子科技有限公司 | Main grid slurry applicable to PERC double-sided MBB battery structure and preparation method thereof |
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Application publication date: 20190712 |