CN105632590A - Crystal silicon solar cell aluminum paste and preparation method therefor - Google Patents
Crystal silicon solar cell aluminum paste and preparation method therefor Download PDFInfo
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- CN105632590A CN105632590A CN201610156704.7A CN201610156704A CN105632590A CN 105632590 A CN105632590 A CN 105632590A CN 201610156704 A CN201610156704 A CN 201610156704A CN 105632590 A CN105632590 A CN 105632590A
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- crystal silicon
- silicon solar
- aluminium
- glass powder
- solar batteries
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 79
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 48
- 239000010703 silicon Substances 0.000 title claims abstract description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000013078 crystal Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 76
- 239000011521 glass Substances 0.000 claims abstract description 55
- 239000011230 binding agent Substances 0.000 claims abstract description 32
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000003960 organic solvent Substances 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000004411 aluminium Substances 0.000 claims description 74
- 239000002002 slurry Substances 0.000 claims description 60
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 26
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 claims description 18
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 18
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical compound OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000001856 Ethyl cellulose Substances 0.000 claims description 12
- 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 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- 239000013543 active substance Substances 0.000 claims description 12
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 12
- 235000019439 ethyl acetate Nutrition 0.000 claims description 12
- 229920001249 ethyl cellulose Polymers 0.000 claims description 12
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 12
- 238000009738 saturating Methods 0.000 claims description 12
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 9
- 239000012752 auxiliary agent Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 235000011837 pasties Nutrition 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 239000004166 Lanolin Substances 0.000 claims description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000020 Nitrocellulose Substances 0.000 claims description 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- -1 Synolac Polymers 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229940039717 lanolin Drugs 0.000 claims description 3
- 235000019388 lanolin Nutrition 0.000 claims description 3
- 229920001220 nitrocellulos Polymers 0.000 claims description 3
- 229920003987 resole Polymers 0.000 claims description 3
- 238000005245 sintering Methods 0.000 abstract description 12
- 239000002245 particle Substances 0.000 abstract description 2
- 239000013081 microcrystal Substances 0.000 abstract 5
- 239000011324 bead Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 206010013786 Dry skin Diseases 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 230000009466 transformation Effects 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
- 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
-
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses crystal silicon solar cell aluminum paste and a preparation method therefor. The preparation method comprises the steps of uniformly mixing raw materials with the specified weight percentages to obtain microcrystal glass powder with a specified mean particle size; then adding an organic solvent with the specified weight percentage into a container, adding organic resin with the specified weight percentage with stirring to perform processing, adding a surfactant to perform processing, and filtering to obtain an organic binder; and finally, according to a component ratio, mixing aluminum powder, the microcrystal glass powder, the organic binder and an additive to obtain the crystal silicon solar microcrystal glass aluminum paste containing the following components in percentage by weight: 0.5-5% of the microcrystal glass powder, 65-80% of the aluminum powder, 10-30% of the organic binder and 0.1-5% of the additive. According to the crystal silicon solar cell aluminum paste and the preparation method, the microcrystal glass powder is used, so that the adhesion force is greatly increased when a silicon wafer is reversely plated, the warping degree is relatively low, and the appearance condition is still kept; and the paste has the advantages of no aluminum bead, no bulge and the like during sintering at a relatively high temperature.
Description
Technical field
The present invention relates to a kind of aluminium slurry and its preparation method, particularly relate to a kind of crystal silicon solar batteries aluminium slurry and its preparation method.
Background technology
Sun power is a kind of inexhaustible clean energy, and sun power generating directly solar radiant energy is converted to electric energy, is in all clean energies, the conversion links of sun power is minimum, the most direct mode of utilization. At present, crystal silicon solar energy battery is main solar cell.
Aluminium slurry is a kind of important source material preparing crystal silicon solar energy battery, usually silk-screen printing technique is adopted to be printed in P-type silicon cell backside, then aluminium atomic diffusion is made to enter in the middle of silicon body through drying sintering, form p-p+, this back surface field can reduce electronics and the hole recombination rate at interface, increase the life-span of current carrier, also can increase ruddiness effect, thus play the effect promoting battery open circuit voltage and short-circuit current. When forming aluminium back surface field, this aluminium back surface field can form Xi Za center, produces Na, Li, K, Fe, Co, Ni, Cu in silicon etc. to inhale assorted effect, thus plays lifting packing factor, finally plays the effect improving photoelectric transformation efficiency.
Owing to silicon face is very bright, a large amount of sunlights can be reflected away, can not be utilized by battery. Industrial production is substantially all deposit one layer of silicon nitride film with chemical vapour deposition for this reason, reflection loss is reduced to 5% even less. And owing to plant issue makes silicon chip back side surrounding there will be anti-plating situation in actually operating, silicon nitride is bigger to heat absorption, make aluminium slurry on the low side at the heat having the place of anti-plating to obtain during sintering, occur that glass powder does not reach molten state, thus the problem causing aluminium slurry sintering back field edge sticking power low and comparatively coarse.
Summary of the invention
It is an object of the invention to overcome the deficiency of prior art existence, it is provided that a kind of crystal silicon solar batteries aluminium slurry and its preparation method.
The object of the present invention is achieved through the following technical solutions:
A kind of crystal silicon solar batteries aluminium slurry, it is characterised in that: comprise following weight percent composition: microcrystalline glass powder 0.5-5wt%, aluminium powder 65-80wt%, organic binder bond 10-30wt%, additive 0.1-5wt%.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: described microcrystalline glass powder comprises following weight percent composition: SiO2: 4-20wt%, Bi2O3: 40-60wt%, Sb2O3: 10-30wt%, ZnO:2-12wt%, B2O3: 5-25wt%, Li2O:1-15wt%, Al2O3: 1-15wt%, TiO2: 1-20wt%, ZrO2: 1-20wt%, MgO2: 1-20wt%.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: the median size of described microcrystalline glass powder is 0.1-5 ��m.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: described aluminium powder is ball type aluminium powder, its purity > 98.5%, and median size is 1-8um.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: described organic binder bond comprises following weight percent composition: organic resin 2-15wt%, organic solvent 80-95wt%, tensio-active agent 0.5-5wt%.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: described organic resin is the combination of one or more in ethyl cellulose, Nitrocellulose, Synolac, resol; Described organic solvent is the combination of one or more in the saturating alcohol of turps, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, propyl carbinol, ethylene glycol monobutyl ether, ethylene glycol phenyl ether; Described tensio-active agent is the combination of one or more in Yelkin TTS, department class, lanolin.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: described organic resin is ethyl cellulose; Described organic solvent is the mixture that the saturating alcohol of turps, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethylene glycol phenyl ether compare formation according to specified wt; Described tensio-active agent is class of department.
Preferably, described a kind of crystal silicon solar batteries aluminium slurry, wherein: described additive is any one in silane coupling agent kh550 or kh560.
A preparation method for crystal silicon solar batteries aluminium slurry, it comprises the steps:
S1, prepare microcrystalline glass powder: mixed by the raw material of specified wt per-cent and be placed in high temperature resistance furnace, in the molten 0.5-1.5h of 900-1400 DEG C of heat, take out rear shrend, pulverizing, ball milling, sieve, after 60-90 DEG C of drying, sieve and obtain specifying the microcrystalline glass powder of median size;
S2, prepare organic binder bond: add in container by the organic solvent of specified wt per-cent, the organic resin of specified wt per-cent is added under whipped state, it is warming up to 80-100 DEG C, 40-50 DEG C is cooled to after insulation 0.5-1.5h, and after adding the tensio-active agent of specified wt per-cent, filter and obtain organic binder bond;
S3, prepares aluminium slurry: according to composition proportion, by aluminium powder, microcrystalline glass powder, organic binder bond and auxiliary agent mixing, adjust into pasty state, being ground to slurry fineness with three-roller rolling and be less than 20 ��m, viscosity is 15-40Pa S, obtains crystal silicon solar batteries devitrified glass aluminium slurry.
The substantive distinguishing features of technical solution of the present invention and progress are mainly reflected in:
The present invention uses microcrystalline glass powder, under anti-plating situation occurs in silicon chip, substantially increases sticking power, and warpage degree is lower, still keeps outward appearance situation, and sintering does not play the advantages such as bag without aluminium pill at relatively high temperatures.
The aluminium slurry of the present invention improves electricity conversion, and meanwhile, the aluminium slurry of the present invention also improves aluminium slurry water boiling resistance.
Embodiment
Just the present invention program is described further below:
A crystal silicon solar batteries aluminium slurry, comprises following weight percent composition: microcrystalline glass powder 0.5-5wt%, aluminium powder 65-80wt%, organic binder bond 10-30wt%, additive 0.1-5wt%.
Wherein, described microcrystalline glass powder melts in high-temperature sintering process, and aluminium powder is attached to silicon chip surface, forms the conducting film of dense uniform; Described aluminium powder is conducting function phase in the slurry, and it can form eutectic with silicon when high temperature, and plays electric action in the electrodes, can form good ohmic contact with Semiconducting Silicon Materials; Described organic binder bond plays dissemination, makes inorganic powder be dispersed in slurry, forms a kind of stable suspensoid, keeps the proportioning of each component in slurry; Described additive is used to change the processing performance of slurry, makes slurry have certain mobility, thixotropy, plasticity-, makes slurry be easy to silk screen printing.
Except the content of different components can affect except the performance that aluminium is starched, the concrete component type of each component and the physical features of each component also affect the performance of aluminium slurry further.
Concrete, contriver studies discovery, and microcrystalline glass powder is to provide a kind of important connection material contacting silicon in roasting process with melting aluminium, and can also regulate the coefficient of expansion between substrate and aluminium powder, reduces the sinuousness of substrate. It has following several requirement:
1. particle diameter: general 1-3 ��m too little easy generation warpage, too big easily ashing;
2. softening temperature: the softening temperature of glass powder is moderate, too high meeting when peak value can not melting completely, raw burn occurs, too low meeting causes glass overcurrent can not form membrane structure;
3. the coefficient of expansion: its coefficient of expansion should be corresponding with silicon, otherwise easy warpage;
4. foreign matter content: the material not having and causing phototranstormation efficiency to reduce;
5. content: it is very big on the electrical property impact of aluminium slurry, while ensureing technique, it should reduce the content of glass powder as far as possible.
Therefore, microcrystalline glass powder described in the present invention comprises following weight percent composition: SiO2: 4-20wt%, Bi2O3: 40-60wt%, Sb2O3: 10-30wt%, ZnO:2-12wt%, B2O3: 5-25wt%, Li2O:1-15wt%, Al2O3: 1-15wt%, TiO2: 1-20wt%, ZrO2: 1-20wt%, MgO2: 1-20wt%, and the median size of described microcrystalline glass powder is 0.1-5 ��m.
Owing to back aluminium slurry when the anti-silicon chip plated exists sintering is by warm uneven phenomenon, there is the situation that softening temperature cannot be taken into account in general glass powder, and the softening temperature of microcrystalline glass powder is lower, even if therefore there is the situation of anti-plating, microcrystalline glass powder still can reach molten state, simultaneously owing to microcrystalline glass powder can precipitate out crystal tiny in a large number when thermal treatment, the microcrystalline glass powder of low softening point is made to there will not be the phenomenon of overcurrent at relatively high temperatures, thus it is low to ensure that aluminium slurry sintering back field edge has higher sticking power.
Simultaneously, exist owing to aluminium powder is the conductive phase main as back surface field, it is interconnected to constitute conductive network after sintering, and form sialic layer alloy with silicon layer, absorbing unnecessary impurity, the output characteristic of solar cell and back of the body electric field outward appearance are had crucial impact by every performance of aluminium powder.
Therefore, described aluminium powder is ball type aluminium powder, its purity > 98.5%, and median size is 1-8um.
Described organic binder bond comprises following weight percent composition: organic resin 2-15wt%, organic solvent 80-95wt%, tensio-active agent 0.5-5wt%.
Further, organic resin is that microcrystalline glass powder and other pressed powders using aluminium powder with as high-temperature agglomerant is dispersed into paste fluid, and to facilitate the method with printing to be printed on substrate by slurry, for this kind of situation, organic resin should have following several requirement:
1. organic carrier should be all inert substance, does not mutually react;
2. organic carrier mainly acts on is dispersed powders, and it requires that the surface tension of contact surface between powder is little, ensures good wetting capacity;
3. having suitable volatility, organic carrier should have lower vapour pressure at low temperatures, and should easily volatilize at a certain temperature, can volatilize rapidly, avoid slurry secondary flow under high temperature;
4. have suitable mobility, carrier and pressed powder in conjunction with time flocculent structure can be provided, mould flow pattern thixotroping system to be formed, viscosity is moderate, adjustable;
5. organic carrier should not have fixing boiling point, in heat-processed can progressively gasification, and combustion, and ash content to be lacked as far as possible.
Therefore, in the present invention, described organic resin is the combination of one or more in ethyl cellulose, Nitrocellulose, Synolac, resol; Described organic solvent is the combination of one or more in the saturating alcohol of turps, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, propyl carbinol, ethylene glycol monobutyl ether, ethylene glycol phenyl ether; Described tensio-active agent is the combination of one or more in Yelkin TTS, department class, lanolin.
Preferably, described organic resin is ethyl cellulose; Described organic solvent is the mixture that the saturating alcohol of turps, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethylene glycol phenyl ether compare formation according to specified wt; Described tensio-active agent is class of department.
Each raw material can directly use marketing industries level above, and cost control and Supplier Selection threshold is lower.
Described additive is any one in silane coupling agent kh550 or kh560.
Further, present invention further teaches the preparation method of a kind of crystal silicon solar batteries aluminium slurry, comprise the steps:
S1, prepare microcrystalline glass powder: mixed by the raw material of specified wt per-cent and be placed in high temperature resistance furnace, in the molten 0.5-1.5h of 900-1400 DEG C of heat, take out rear shrend, pulverizing, ball milling, sieve, after 60-90 DEG C of drying, sieve and obtain specifying the microcrystalline glass powder of median size;
S2, prepare organic binder bond: add in container by the organic solvent of specified wt per-cent, the organic resin of specified wt per-cent is added under whipped state, it is warming up to 80-100 DEG C, 40-50 DEG C is cooled to after insulation 0.5-1.5h, and after adding the tensio-active agent of specified wt per-cent, filter and obtain organic binder bond;
S3, prepares aluminium slurry: according to composition proportion, by aluminium powder, microcrystalline glass powder, organic binder bond and auxiliary agent mixing, adjust into pasty state, being ground to slurry fineness with three-roller rolling and be less than 20 ��m, viscosity is 15-40Pa �� S, obtains crystal silicon solar batteries devitrified glass aluminium slurry.
Certainly, above-mentioned S1, prepares microcrystalline glass powder, S2, and the order preparing organic binder bond does not have strict restriction, as long as at S3, prepares before aluminium is starched and completes above-mentioned two steps.
Embodiment 1
Prepare organic binder bond: according to composition proportion: ethyl cellulose: 6.5wt%, the saturating alcohol of turps: 5wt%, ethylene glycol monobutyl ether: 50wt%, diethylene glycol monobutyl ether acetic ester: 32.5wt%, ethylene glycol phenyl ether: 5wt%, department class: 1wt%; By saturating for turps alcohol, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethylene glycol phenyl ether adds in container, under agitation adds ethyl cellulose, is warming up to 95 �� 2 DEG C, insulation 1h, is cooled to 50 DEG C and adds class of department, filters and obtain organic binder bond.
Prepare microcrystalline glass powder: according to composition proportion: SiO2: 12wt%, Bi2O3: 41.5wt%, Sb2O3: 10wt%, ZnO:2.5wt%, B2O3: 15wt%, Li2O:4wt%, Al2O3: 3wt%, TiO2: 2.5%, ZrO2: 1.5%, MgO2: 8%; All raw materials are mixed, is placed in high temperature resistance furnace and carries out melting, in the molten 0.5h of 1100 DEG C of heat, take out rear shrend, pulverizing, ball milling, sieve, after 70 �� 5 DEG C of dryings, sieve and obtain the microcrystalline glass powder that median size is 0.1-5 ��m.
Prepare slurry: according to composition proportion, aluminium powder: 75.5wt%, organic binder bond: 21.2wt%, microcrystalline glass powder: 2.5wt%, auxiliary agent: 0.8wt%, by aluminium powder, microcrystalline glass powder, organic binder bond and auxiliary agent mixing, adjust into pasty state, being ground to slurry fineness with three-roller rolling and be less than 18 ��m, viscosity is 20-35Pa �� S, namely obtains crystal silicon solar batteries devitrified glass aluminium slurry.
Size performance is tested:
Viscosity: 25Pa S;
Fineness: 16um;
Printing: 280 order screen paintings, version of or not slipping through the net stickyly;
Phototranstormation efficiency (average): 156*156 polysilicon chip 18.24%;
Warpage (average): 1.8mm measured by clearance gauge;
Sticking power (average): 78N;
Boiling property of water: be placed in by cell piece after 85 DEG C of deionized waters soak 30min and produce without obvious bubble, takes out and blows dry rear back surface field color without considerable change;
Outward appearance: after sintering, back surface field is smooth.
Embodiment 2
Prepare organic binder bond: according to composition proportion: ethyl cellulose: 6.8wt%, the saturating alcohol of turps: 10wt%, ethylene glycol monobutyl ether: 30wt%, diethylene glycol monobutyl ether acetic ester: 46.7wt%, ethylene glycol phenyl ether: 5wt%, department class: 1.5wt%; By saturating for turps alcohol, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethylene glycol phenyl ether adds in container, under agitation adds ethyl cellulose, is warming up to 95 �� 2 DEG C, insulation 1h, is cooled to 50 DEG C and adds class of department, filters and obtain organic binder bond.
Prepare microcrystalline glass powder: according to composition proportion: SiO2: 10wt%, Bi2O3: 40.5wt%, Sb2O3: 12wt%, ZnO:3wt%, B2O3: 14wt%, Li2O:4wt%, Al2O3: 2.5wt%, TiO2: 2%, ZrO2: 2%, MgO2: 10%; All raw materials are mixed, is placed in high temperature resistance furnace and carries out melting, in the molten 0.5h of 1150 DEG C of heat, take out rear shrend, pulverizing, ball milling, sieve, after 70 �� 5 DEG C of dryings, sieve and obtain the microcrystalline glass powder that median size is 0.1-5 ��m.
Prepare slurry: according to composition proportion, aluminium powder: 76.0wt%, organic binder bond: 21.0wt%, microcrystalline glass powder: 2.0wt%, auxiliary agent: 1.0wt%, by aluminium powder, microcrystalline glass powder, organic binder bond and auxiliary agent mixing, adjust into pasty state, being ground to slurry fineness with three-roller rolling and be less than 18 ��m, viscosity is 20-35Pa �� S, namely obtains crystal silicon solar batteries devitrified glass aluminium slurry.
The producer of the composition of the present embodiment is identical with embodiment 1, and size performance is tested:
Viscosity: 28Pa S;
Fineness: 16um;
Printing: 280 order screen paintings, version of or not slipping through the net stickyly;
Phototranstormation efficiency (average): 156*156 polysilicon chip 18.26%;
Warpage (average): 1.6mm measured by clearance gauge;
Sticking power (average): 62N;
Boiling property of water: be placed in by cell piece after 85 DEG C of deionized waters soak 30min and produce without obvious bubble, takes out and blows dry rear back surface field color without considerable change;
Outward appearance: after sintering, back surface field is smooth.
Embodiment 3
Prepare organic binder bond: according to composition proportion: ethyl cellulose: 7.0wt%, the saturating alcohol of turps: 5wt%, ethylene glycol monobutyl ether: 46.8wt%, diethylene glycol monobutyl ether acetic ester: 30wt%, ethylene glycol phenyl ether: 10wt%, department class: 1.2wt%; By saturating for turps alcohol, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethylene glycol phenyl ether adds in container, under agitation adds ethyl cellulose, is warming up to 95 �� 2 DEG C, insulation 1h, is cooled to 50 DEG C and adds class of department, filters and obtain organic binder bond.
Prepare microcrystalline glass powder: according to composition proportion: SiO2: 7wt%, Bi2O3: 38.5wt%, Sb2O3: 13.5wt%, ZnO:1.5wt%, B2O3: 16wt%, Li2O:6wt%, Al2O3: 3wt%, TiO2: 2.5%, ZrO2: 1%, MgO2: 11%; All raw materials are mixed, is placed in high temperature resistance furnace and carries out melting, in the molten 0.5h of 1100 DEG C of heat, take out rear shrend, pulverizing, ball milling, sieve, after 70 �� 5 DEG C of dryings, sieve and obtain the microcrystalline glass powder that median size is 0.1-5 ��m.
Prepare slurry: according to composition proportion, aluminium powder: 76.5wt%, organic binder bond: 20.5wt%, microcrystalline glass powder: 1.5wt%, auxiliary agent: 1.5wt%, by aluminium powder, microcrystalline glass powder, organic binder bond and auxiliary agent mixing, adjust into pasty state, being ground to slurry fineness with three-roller rolling and be less than 18 ��m, viscosity is 20-35Pa �� S, namely obtains crystal silicon solar batteries devitrified glass aluminium slurry.
The producer of the composition of the present embodiment is identical with embodiment 1, and size performance is tested:
Viscosity: 32Pa S;
Fineness: 17um;
Printing: 280 order screen paintings, version of or not slipping through the net stickyly;
Phototranstormation efficiency (average): 156*156 polysilicon chip 18.23%;
Warpage (average): 1.5mm measured by clearance gauge;
Sticking power (average): 52N;
Boiling property of water: be placed in by cell piece after 85 DEG C of deionized waters soak 30min and produce without obvious bubble, takes out and blows dry rear back surface field color without considerable change;
Outward appearance: after sintering, back surface field is smooth.
Below it is only the better embodiment of the present invention, not the present invention is done any restriction in form, every any simple modification, equivalent variations and modification above embodiment done according to the technical spirit of the present invention, all still belongs in the scope of technical solution of the present invention.
Claims (9)
1. a crystal silicon solar batteries aluminium slurry, it is characterised in that: comprise following weight percent composition: microcrystalline glass powder 0.5-5wt%, aluminium powder 65-80wt%, organic binder bond 10-30wt%, additive 0.1-5wt%.
2. a kind of crystal silicon solar batteries aluminium slurry according to claim 1, it is characterised in that: described microcrystalline glass powder comprises following weight percent composition: SiO2: 4-20wt%, Bi2O3: 40-60wt%, Sb2O3: 10-30wt%, ZnO:2-12wt%, B2O3: 5-25wt%, Li2O:1-15wt%, Al2O3: 1-15wt%, TiO2: 1-20wt%, ZrO2: 1-20wt%, MgO2: 1-20wt%.
3. a kind of crystal silicon solar batteries aluminium slurry according to claim 1, it is characterised in that: the median size of described microcrystalline glass powder is 0.1-5 ��m.
4. a kind of crystal silicon solar batteries aluminium slurry according to claim 1, it is characterised in that: described aluminium powder is ball type aluminium powder, its purity > 98.5%, and median size is 1-8um.
5. a kind of crystal silicon solar batteries aluminium slurry according to claim 1, it is characterised in that: described organic binder bond comprises following weight percent composition: organic resin 2-15wt%, organic solvent 80-95wt%, tensio-active agent 0.5-5wt%.
6. a kind of crystal silicon solar batteries aluminium slurry according to claim 5, it is characterised in that: described organic resin is the combination of one or more in ethyl cellulose, Nitrocellulose, Synolac, resol; Described organic solvent is the combination of one or more in the saturating alcohol of turps, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, propyl carbinol, ethylene glycol monobutyl ether, ethylene glycol phenyl ether; Described tensio-active agent is the combination of one or more in Yelkin TTS, department class, lanolin.
7. a kind of crystal silicon solar batteries aluminium slurry according to claim 5, it is characterised in that: described organic resin is ethyl cellulose; Described organic solvent is the mixture that the saturating alcohol of turps, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethylene glycol phenyl ether compare formation according to specified wt; Described tensio-active agent is class of department.
8. according to the arbitrary described a kind of crystal silicon solar batteries aluminium slurry of claim 1-7, it is characterised in that: described additive is any one in silane coupling agent kh550 or kh560.
9. the preparation method of a crystal silicon solar batteries aluminium slurry, it is characterised in that: comprise the steps:
S1, prepare microcrystalline glass powder: mixed by the raw material of specified wt per-cent and be placed in high temperature resistance furnace, in the molten 0.5-1.5h of 900-1400 DEG C of heat, take out rear shrend, pulverizing, ball milling, sieve, after 60-90 DEG C of drying, sieve and obtain specifying the microcrystalline glass powder of median size;
S2, prepare organic binder bond: add in container by the organic solvent of specified wt per-cent, the organic resin of specified wt per-cent is added under whipped state, it is warming up to 80-100 DEG C, 40-50 DEG C is cooled to after insulation 0.5-1.5h, and after adding the tensio-active agent of specified wt per-cent, filter and obtain organic binder bond;
S3, prepares aluminium slurry: according to composition proportion, by aluminium powder, microcrystalline glass powder, organic binder bond and auxiliary agent mixing, adjust into pasty state, being ground to slurry fineness with three-roller rolling and be less than 20 ��m, viscosity is 15-40Pa S, obtains crystal silicon solar batteries devitrified glass aluminium slurry.
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