CN107767985A - One kind back of the body passivation solar cell aluminium paste - Google Patents
One kind back of the body passivation solar cell aluminium paste Download PDFInfo
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- CN107767985A CN107767985A CN201610727021.2A CN201610727021A CN107767985A CN 107767985 A CN107767985 A CN 107767985A CN 201610727021 A CN201610727021 A CN 201610727021A CN 107767985 A CN107767985 A CN 107767985A
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- aluminium paste
- solar cell
- powder
- aluminium
- body passivation
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 55
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000004411 aluminium Substances 0.000 title claims abstract description 48
- 238000002161 passivation Methods 0.000 title claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 3
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 8
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 claims description 8
- -1 Alcohol ester Chemical class 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 4
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 4
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000052 vinegar Substances 0.000 claims description 4
- 235000021419 vinegar Nutrition 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims 1
- 239000001913 cellulose Substances 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 claims 1
- 239000010703 silicon Substances 0.000 abstract description 19
- 229910052710 silicon Inorganic materials 0.000 abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 238000009835 boiling Methods 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229920001727 cellulose butyrate Polymers 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000005331 crown glasses (windows) Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910052571 earthenware Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009288 screen filtration Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000632 Alusil Inorganic materials 0.000 description 1
- 241000186216 Corynebacterium Species 0.000 description 1
- 229910020615 PbO—SiO2 Inorganic materials 0.000 description 1
- 229910007472 ZnO—B2O3—SiO2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000005308 flint glass Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003238 silicate melt Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009736 wetting Methods 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
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
-
- 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
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for 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
- H01L31/02—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Dispersion Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inorganic Chemistry (AREA)
- Photovoltaic Devices (AREA)
- Glass Compositions (AREA)
Abstract
The present invention relates to one kind to carry on the back passivation solar cell aluminium paste, it is characterised in that：The composition and its percetage by weight of the aluminium paste be：Aluminium powder 75~85%, lead-free glass powder 2 8%, organic bond 15 23%, inorganic bond 1.5~3.6%, surplus is organic carrier, and wherein the percetage by weight sum of each component is 100%.Fineness≤15 μm are rolled to three-roll grinder after the aluminium powder, organic bond, inorganic bond, organic carrier and lead-free glass powder are well mixed, the back of the body that viscosity is 25~37Pa.s is passivated solar cell aluminium paste.The crystal silicon solar battery back field aluminium paste, electricity conversion is high, and adhesive force is high, and the decay of adhesive force transformation efficiency is small after high temperature ageing, and water boiling resistance performance is good.
Description
Technical field
The present invention relates to a kind of crystal silicon solar energy battery back field aluminum paste, and it is brilliant specifically to further relate to a kind of efficiently low warpage
Body silicon solar cell back surface field aluminium paste and preparation method thereof, belongs to technical field of solar batteries.
Background technology
Cost for solar power generation is reduced, is the target that increasingly competitive photovoltaic industry is pursued.First：Reduce silicon raw material
Cost, generally require to thinner silicon chip development, the thinner silicon chip of use is later crystal silicon solar energy battery industry development
One of trend.The shortage of silicon raw material, accelerate silicon chip and develop to sheet, the thickness of the silicon chip used in many photovoltaic enterprises is
Between 180~220 μm, and rear surface of solar cell at this stage substantially uses Al-BSF, and this Al-BSF plays one
The effect of individual P+ layers, although preventing migration of the minority carrier to back surface from reducing the recombination velocity at the back side, answer the back side
Sum velocity also brings along the problem of some are new simultaneously in 1000~10000cm/s, due to the thermal coefficient of expansion of aluminium and silicon not
Together, when silicon chip is less than 150 μm, after oversintering, slice, thin piece will be bent, and improve battery production to a certain extent
The fragment rate of line and component, influence production capacity output.And because crystalline silicon is gap carrying material, the absorption coefficient of light is small, solar energy
When cell thickness reduces, lost caused by transmitted light and increased with the reduction of thickness, come for indirect forbidden band material silicon
Say, this loss is bigger than direct forbidden band material.Second：Improve the conversion efficiency of cell piece.This just needs new technology and thin
Piece is combined.On the one hand, it is a kind of approach to develop new resistant to bending slurry (for thin slice), although this respect has taken
Good achievement, but due to the characteristic that the intrinsic mitigation of Al-BSF is passivated, when the thickness of silicon chip is less than 150 μm,
This characteristic of Al-BSF will have very big limitation to solar battery efficiency.On the other hand, for the battery of sheet
Piece is, it is necessary to good passivating back effect.Back of the body passivating solar battery is the developing direction of crystal-silicon solar cell, by the sun
Cell backside plates last layer passivating film, minority carrier life time can be improved, so as to improve battery efficiency.Carry on the back the passivating solar battery back side
The mode of partial metallic contact is taken in metallization, is slotted or opened on passivating film by using the mode of laser or etch paste
Hole, then print AL slurries and be sintered.The technology of novel battery piece is to aluminium paste it is also proposed that new requirement.Back of the body passivation first is using big
Use alumina passivation layer, it is necessary to which back side perforate again, after printing aluminium paste is sintered, tapping forms alusil alloy layer more.Secondly
Aluminium paste and alumina passivation layer can not be excessive reaction, influence passivation effect, but must react causes pulling force insufficient.Finally
Water boiling resistance is needed after aluminium paste is sintered.
The content of the invention
The primary and foremost purpose of the present invention is, matches the back of the body passivating technique of existing cell piece, there is provided a kind of efficient, high-tensile strength,
The preparation method of the back of the body passivation solar energy aluminium paste of water boiling resistance.
In high flint glass, pb2+Ion is in the top of cubic centrum, and the inertia electronics of lead ion is in away from four
The one side of oxonium ion, form a kind of spiral chain structure, in glass with silicon-oxy tetrahedron SiO4Pass through drift angle or common side
It is connected, forms a kind of ad hoc network, make PbO-SiO2System has very wide forming area of glass, and determines lead oxide in silicon
High fluxibility in silicate melt.In crown glass system, Bi is that instead of Pb optimal element in theory, with BiO3Triangle body
Gradually by BiO4Tetrahedral structure replaces, and makes the viscosity of glass reduce, but often needs addition very big in formula, and imitates
Fruit is poorer than PbO.ZnO and B is introduced in the glass dust of the present invention2O3, with Bi2O3Collocation uses, and plays a part of substituting PbO；
ZnO fusing points are relatively low, and the softening point of glass can be greatly reduced in glass, increase the mobility of glass, so as to improve aluminium
The water boiling resistance performance of slurry, while reduce the coefficient of expansion；But ZnO increases rear glass and easily crystallized, therefore it is very strong to introduce fluxibility
B2O3, BaCO3 reduce crystallization of the glass in quenching process, so as to improve wellability of the glass to silicon chip；SiO2Shape is provided
Into the network structure needed for glass, Bi2O3、ZnO、SiO2And B2O3The primary structure of glass is determined, fusing point is low and network is steady
It is fixed；CaCO3 can reduce the viscosity of glass dust in high temperature, while promote the fusing and clarification of glass, can be with using in aluminium paste
Promote glass dust " to eat " aluminum oxide on aluminium powder surface, a large amount of aluminium liquids is flowed into pod aperture, add the amount of silico-aluminum formation.From
And increase open-circuit voltage, improve electricity conversion；Al2O3The network structure stability of glass can be increased substantially, reduces glass
The coefficient of expansion of glass, improve the acid resistance of glass.MoO can dramatically increase the wettability of glass metal, make glass liquid energy effective
" eating " aluminium powder surface oxide layer add silico-aluminum formation amount.So as to increase open-circuit voltage, electricity conversion is improved,
Wetting of the glass dust to passivation layer can be increased simultaneously, increase adhesive force.The thermal coefficient of expansion that BeO can substantially reduce glass improves
The heat endurance and chemical stability of glass, and BeO can effectively hinder glass dust in Bi2O3-ZnO-B2O3-SiO2 systems
With the big quantitative response of passivation layer, passivation layer is protected, improves cell conversion efficiency.BeO additions can make Bi2O3-ZnO-
Aluminium reaches close to degree of saturation in B2O3-SiO2 systems, it is possible to protects passivation layer.La2O3, which is added, can effectively improve silicon
The compactness of aluminium alloy layer, open-circuit voltage is improved, increase electrical property.La2O3 is a kind of alterant of silico-aluminum, can be effective
Change silico-aluminum in cooling crystallization stage, the compactness of alloy-layer.In solar energy sintering process, cooling velocity quickly,
La2O3 effects are to allow silico-aluminum to separate out the structure for needle-like compactness, rather than the structure of sheet loose type, so as to improve open circuit
Voltage increases electrical property.La2O3 can be enriched in the preferential growth side that alloy-layer is changed on silico-aluminum layer in cooling procedure
To making the thick good fortune in interface, show the growth tendency of isotropic, so as to which the form of alloy is changed into corynebacterium even from gill shape
Point-like compactness.Have and additive is polyamide wax, be the thixotropy for increasing slurry, primarily to improving in printing process
Slurry is passivated the flowing of tapping in the back of the body, allows slurry to be penetrated into by itself flowing in hole.Secondly：The back of the body passivation aluminium paste solid content compared with
Height, conventional aluminium paste are difficult to by 300 mesh above silk screens, so the aluminium paste that demand thixotropy is high.The high aluminium paste of last thixotropy is easy
Preserve.Do not settle, be layered.It is mainly the mobility for improving slurry in high temperature sintering to add Bi2O3.It ensure that aluminium
The contact area of slurry and tapping.And then improve open-circuit voltage and short circuit current.
To solve above technical problem, a kind of back of the body passivation solar cell aluminium paste provided by the present invention, it is characterised in that：
The composition and its percetage by weight of the aluminium paste be：Aluminium powder 75~85%, lead-free glass powder 2-8%, organic bond 15-23%,
Inorganic bond 1.5~3.6%, surplus are organic carrier, and wherein the percetage by weight sum of each component is 100%.The aluminium
Powder is purity ＞ 99.9%, and 1-2um ball aluminum powder, tap density is >=1.1g/cm3, oxygen content 1.3-1.8,3-4um's
Ball aluminum powder tap density is 1.30g/cm3, oxygen content 0.6-0.9,5-7um ball aluminum powder tap density are 1.45g/
cm3, oxygen content is that 0.30-0.40 patterns are spherical.The organic carrier is：Vinegar cellulose butyrate 3~8%, butyl carbitol
40~65%, butyl carbitol acetate 20~30%, acrylic resin 2~6%, alcohol ester ten two 8%~15%, Tween-85 2
~7%, ATBC 2~8%.Back of the body passivation solar cell aluminium paste according to claim 1, it is characterised in that：
The lead-free glass powder is formed by mass parts：ZnO 35-55%, Bi2O310-30%, H2B2O412-20%, SiO20.5-
3%, CaCO3, 0.7-3.5%, Al2O30.5-2%, Sb2O310-20%, BaCO3 10-15%, MoO 3-5%, BeO 1-
3%th, La2O3 3-6%.
The organic bond is polyamide wax.The inorganic bond is Bi2O3.
It is an advantage of the current invention that overcome problems of the prior art, there is provided a kind of crystal silicon solar battery back
The preparation method of field aluminium paste, manufactured aluminium paste electricity conversion is high, and adhesive force is high, and adhesive force transformation efficiency after high temperature ageing
Decay small, water boiling resistance performance is good.
Embodiment
Embodiment one
| Vinegar cellulose butyrate | 3% |
| Butyl carbitol | 50% |
| Butyl carbitol acetate | 20% |
| Acrylic resin | 6% |
| Alcohol ester 12 | 12% |
| Tween-85 | 7% |
| ATBC | 2% |
(1) organic carrier is produced：After said components are weighed in proportion, it is placed in reactor and is heated to 80~100
DEG C, heat while stirring, stir 5-8h, with 200 eye mesh screen filtration supports, be placed on stand-by in stainless steel cask.
| ZnO | 35% |
| Bi2O3 | 18% |
| H2B2O4 | 15% |
| SiO2 | 2% |
| CaCO3 | 2% |
| Al2O3 | 1% |
| Sb2O3 | 10% |
| BaCO3 | 10% |
| MoO | 3% |
| BeO | 1% |
| La2O3 | 3% |
(2) lead-free glass powder is produced：Said components are weighed in proportion, after being well mixed with batch mixer, load quartzy earthenware
In crucible, 2~3h is dried in 110 DEG C of baking ovens, then silica crucible taking-up is placed in batch-type furnace and is warming up to 20 DEG C/min
0.3~0.8h of melting at a temperature of 1000 DEG C~1300 DEG C, glass dregs are dried, be put into jaw after then being quenched using deionized water
In pulverizer, 25 μm are crushed to once.Then 1.5~3h of dry ball milling, sieving obtain the crown glass below 2.3 μm of particle diameter
Powder；
| Aluminium powder | 75% |
| Organic bond | 15% |
| Inorganic bond | 2% |
| Organic carrier | 6% |
| Lead-free glass powder | 2% |
(3) used after being well mixed the aluminium powder, organic bond, inorganic bond, organic carrier and lead-free glass powder
Three-roll grinder is rolled to fineness≤15 μm, and the back of the body that viscosity is 25~37Pa.s is passivated solar cell aluminium paste
Embodiment two：
| Vinegar cellulose butyrate | 4% |
| Butyl carbitol | 55% |
| Butyl carbitol acetate | 20% |
| Acrylic resin | 2% |
| Alcohol ester 12 | 10% |
| Tween-85 | 4% |
| ATBC | 5% |
(1) organic carrier is produced：After said components are weighed in proportion, it is placed in reactor and is heated to 80~100
DEG C, heat while stirring, stir 5-8h, with 200 eye mesh screen filtration supports, be placed on stand-by in stainless steel cask.
| ZnO | 44% |
| Bi2O3 | 13% |
| H2B2O4 | 12% |
| SiO2 | 1% |
| CaCO3 | 1.5% |
| Al2O3 | 0.5% |
| Sb2O3 | 10% |
| BaCO3 | 10% |
| MoO | 4% |
| BeO | 1% |
| La2O3 | 3% |
(2) lead-free glass powder is produced：Said components are weighed in proportion, after being well mixed with batch mixer, load quartzy earthenware
In crucible, 2~3h is dried in 110 DEG C of baking ovens, then silica crucible taking-up is placed in batch-type furnace and is warming up to 20 DEG C/min
0.3~0.8h of melting at a temperature of 1000 DEG C~1300 DEG C, glass dregs are dried, be put into jaw after then being quenched using deionized water
In pulverizer, 25 μm are crushed to once.Then 1.5~3h of dry ball milling, sieving obtain the crown glass below 2.3 μm of particle diameter
Powder；
| Aluminium powder | 76% |
| Organic bond | 16% |
| Inorganic bond | 1.5% |
| Organic carrier | 4.5% |
| Lead-free glass powder | 2% |
(3) used after being well mixed the aluminium powder, organic bond, inorganic bond, organic carrier and lead-free glass powder
Three-roll grinder is rolled to fineness≤15 μm, and the back of the body that viscosity is 25~37Pa.s is passivated solar cell aluminium paste.
Outside above-described embodiment, the present invention can also have other embodiment, all to be formed using equivalent substitution or equivalent transformation
Technical scheme, all fall within the protection domain of application claims.
Claims (6)
1. one kind back of the body passivation solar cell aluminium paste, it is characterised in that：The composition and its percetage by weight of the aluminium paste be：Aluminium powder 75
~85%, lead-free glass powder 2-8%, organic bond 15-23%, inorganic bond 1.5~3.6%, surplus are organic carrier,
Wherein the percetage by weight sum of each component is 100%.
2. back of the body passivation solar cell aluminium paste according to claim 1, it is characterised in that：The aluminium powder is purity ＞
99.9%, 1-2um ball aluminum powder, tap density are >=1.1g/cm3, oxygen content 1.3-1.8,3-4um ball aluminum powder shakes
Real density is 1.30g/cm3, oxygen content 0.6-0.9,5-7um ball aluminum powder tap density are 1.45g/cm3, oxygen content is
0.30-0.40 patterns are spherical.
3. back of the body passivation solar cell aluminium paste according to claim 1, it is characterised in that：The organic carrier is：Vinegar fourth
Acid cellulose 3~8%, butyl carbitol 40~65%, butyl carbitol acetate 20~30%, acrylic resin 2~6%,
Alcohol ester ten two 8%~15%, Tween-85 2~7%, ATBC 2~8%.
4. back of the body passivation solar cell aluminium paste according to claim 1, it is characterised in that：The lead-free glass powder presses quality
Part forms：ZnO 35-55%, Bi2O310-30%, H2B2O412-20%, SiO20.5-3%, CaCO3, 0.7-3.5%,
Al2O30.5-2%, Sb2O310-20%, BaCO3 10-15%, MoO 3-5%, BeO 1-3%, La2O3 3-6%.
5. back of the body passivation solar cell aluminium paste according to claim 1, it is characterised in that：The organic bond is polyamides
Amine wax.
6. back of the body passivation solar cell aluminium paste according to claim 1, it is characterised in that：The inorganic bond is
Bi2O3。
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| CN201610727021.2A CN107767985A (en) | 2016-08-18 | 2016-08-18 | One kind back of the body passivation solar cell aluminium paste |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610727021.2A CN107767985A (en) | 2016-08-18 | 2016-08-18 | One kind back of the body passivation solar cell aluminium paste |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592704A (en) * | 2012-02-13 | 2012-07-18 | 江苏瑞德新能源科技有限公司 | Aluminum paste for solar energy battery and preparation method thereof |
| US20150007880A1 (en) * | 2012-01-13 | 2015-01-08 | Hanwha Chemical Corporation | Glass frit, and conductive paste composition and solar cell comprising the same |
| CN106328249A (en) * | 2015-06-29 | 2017-01-11 | 江苏正能电子科技有限公司 | Back passivation solar cell aluminum paste |
| CN106328245A (en) * | 2015-06-19 | 2017-01-11 | 江苏正能电子科技有限公司 | Back-passivation solar cell aluminum paste |
-
2016
- 2016-08-18 CN CN201610727021.2A patent/CN107767985A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150007880A1 (en) * | 2012-01-13 | 2015-01-08 | Hanwha Chemical Corporation | Glass frit, and conductive paste composition and solar cell comprising the same |
| CN102592704A (en) * | 2012-02-13 | 2012-07-18 | 江苏瑞德新能源科技有限公司 | Aluminum paste for solar energy battery and preparation method thereof |
| CN106328245A (en) * | 2015-06-19 | 2017-01-11 | 江苏正能电子科技有限公司 | Back-passivation solar cell aluminum paste |
| CN106328249A (en) * | 2015-06-29 | 2017-01-11 | 江苏正能电子科技有限公司 | Back passivation solar cell aluminum paste |
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Application publication date: 20180306 |