CN105225722A - A kind of crystal silicon solar batteries aluminium paste of high conduction performance - Google Patents
A kind of crystal silicon solar batteries aluminium paste of high conduction performance Download PDFInfo
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- CN105225722A CN105225722A CN201510687898.9A CN201510687898A CN105225722A CN 105225722 A CN105225722 A CN 105225722A CN 201510687898 A CN201510687898 A CN 201510687898A CN 105225722 A CN105225722 A CN 105225722A
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Abstract
The invention discloses a kind of crystal silicon solar batteries aluminium paste of high conduction performance, its recipe ingredient comprises by weight percentage: aluminium powder 65 ~ 78%, lead-free glass powder 1 ~ 5%, organic carrier 15 ~ 30%, that resist warping additive 0.5 ~ 3% and auxiliary agent 0.1 ~ 3%, wherein, by weight percentage, the oxygen content of aluminium powder is less than 0.4%, the solar cell aluminum slurry organizine reticulated printing be mixed with by this recipe ingredient, after high temperature sintering, open circuit voltage can be improved, improve the photoelectric conversion efficiency of cell piece, simultaneously, the outward appearance of solar battery sheet is good, aluminium film is smooth, do not play aluminium pill, aluminium bud, angularity is little, water boiling resistance performance is good, meet the demand to crystal silicon solar batteries aluminium paste on market completely.
Description
Technical field
The present invention relates to crystal silicon solar energy battery aluminium paste, be specifically related to a kind of crystal silicon solar batteries aluminium paste of high conduction performance.
Background technology
Crystal silicon solar energy battery is a kind of semiconductor device luminous energy being directly changed into electric energy.P-type silicon solar cell, usual needs are at silicon substrate back up aluminum conductive electric slurry, then drying, sintering process, aluminium atoms permeating is made to enter in the middle of silicon body, form p-p+ knot, the existence of this aluminium back surface field can reduce electronics and the hole recombination rate at interface, increases the life-span of charge carrier, increase ruddiness effect, thus play the effect promoting battery open circuit voltage and short circuit current.When forming aluminium back surface field, aluminium can also form silicon-aluminum with silicon, and this silicon-aluminum layer can play the effect of gettering, namely absorbs the impurity in the middle of silicon crystal lattice, thus play the effect promoting parallel resistance and fill factor, curve factor, finally play the effect improving photoelectric conversion efficiency.So the performance of aluminium paste is very important for raising solar cell photoelectric characteristic.
Solar cell conductive aluminium paste is prepared from by certain proportioning by components such as aluminium powder, unorganic glass adhesive, organic carrier and additives, wherein aluminium powder is as conductive phase, its shape, granular size, the electrical property of the factors such as domain size distribution on back electrode of solar cell all has impact.Therefore, at present, about the influence research of the performance of aluminium powder and various optimization level pairing crystal silicon solar batteries electrical property thereof is very active, as: the patent that the aluminium powder collocation of different-grain diameter size uses has CN201110387715.3, CN201210446534.8, CN201210166982.2 etc.; Difform aluminium powder patent used in combination has CN200980135103.6, CN201110201715.X, CN201310633274.X etc.All not mentioned to the degree of oxidation on aluminium powder surface in above-described most patent, also there are some patents as CN201210166982.2; CN201310485907.7; CN201510015499.8 mentions the alumina layer that aluminium powder Surface coating has 2-10nm thick, and the impact of the existence of alumina flake on electrical performance of cell is apparent, the thickness of alumina layer oxygen content that is thicker or aluminium powder is higher, electric conductivity will inevitably reduce, such as the thickness of aluminium powder surface oxidation aluminium lamination is greater than 10nm, in current slurry Fast Sintering technique, the aluminium oxide rete corrosion that probably glass dust one deck to aluminium powder surface is thicker is incomplete, therefore the contact of silicon and aluminium can be hindered to form alloy-layer, thus hinder the formation of aluminium back surface field.But, adopt oxygen content lower than 0.4% the drawback brought as conductive phase of aluminium powder be: the aluminium film bad order on the one hand after sintering, easily play aluminium pill, aluminium bud and warpage larger; Water boiling resistance performance also can be adversely affected on the other hand, and this is also the reason that in a very long time, this aluminium powder is not adapted by one skilled in the art.The object of the present invention is to provide a kind of high conduction performance solar cell aluminium paste, under the prerequisite ensureing aluminium film outward appearance and poach performance, adopt oxygen content lower than 0.4% aluminium powder to improve the electrical property of back electrode of solar cell as conductive phase.
Summary of the invention
The object of the invention is to, with oxygen content lower than 0.4% aluminium powder make conductive phase and improve the electrical property of back electrode of solar cell, the electricity conversion of aluminium paste is carried on the back in further raising in the market, solves its aluminium film outward appearance brought and the bad technical problem of poach performance simultaneously.
For achieving the above object, the technical solution used in the present invention is as follows: a kind of crystal silicon solar batteries aluminium paste of high conduction performance, it is characterized in that, its recipe ingredient comprises by weight percentage: aluminium powder 65 ~ 78%, lead-free glass powder 1 ~ 5%, organic carrier 15 ~ 30%, that resist warping additive 0.5 ~ 3% and auxiliary agent 0.1 ~ 3%, and the percentage by weight sum of each component is 100%.
Preferred technical scheme is, described that resist warping additive comprises component A and/or B component, and described component A is for being selected from ThP
2o
7, UP
2o
7and HfW
2o
8in at least one, B component is M by chemical general formula
2n
3o
12one or more mix, in chemical general formula, M is for being selected from Yb
3+, Er
3+, Y
3+, Lu
3+in one, N is for being selected from W
6+, Mo
6+in one.
Data is had to show, ThP in 300 ~ 1200 DEG C of temperature ranges
2o
7average coefficient of linear expansion be-8.1 × 10
-6/ DEG C, UP in 600 ~ 1500 DEG C of temperature ranges
2o
7average coefficient of linear expansion be-6.3 × 10
-6/ DEG C, HfW in-273 ~ 777 DEG C of temperature ranges
2o
8average coefficient of linear expansion be-8.7 × 10
-6/ DEG C.Chemical general formula is M
2n
3o
12tungstates at the negative expansion coefficient-7.34 ~-6.18 × 10 of 200 ~ 800 DEG C/900 DEG C
-6/ DEG C, the negative expansion coefficient-9.36 ~-6.02 × 10 of its molybdate in RT ~ 800 DEG C
-6/ DEG C, the temperature range of above-mentioned additive performance negative expansion character is wider, and matches with the sintering range of cell piece, and in addition, the absolute value of this additive negative expansion coefficient is comparatively large, namely adds the warpage that little amount just significantly can reduce cell piece.The addition of that resist warping additive is excessive as being greater than 3%, addition 4% in comparative example 2, then with the effective contact between the form of fine solid particle obstruction aluminum particle, and then can cannot form continuous print conductive aluminum film network at that resist warping additive place, fluctuation is caused to electrical property.
Preferred technical scheme is, the average grain diameter of that resist warping additive is less than 3 μm.Aluminium powder is spherical or class is spherical, purity is greater than 99.8%, aluminium powder be the aluminium powder A, the average grain diameter that are less than 2 μm is 3 ~ 5 μm of aluminium powder B and average grain diameter by average grain diameter is that 6 ~ 8 μm of aluminium powder C mix, in aluminium powder total weight 100%, the percentage by weight of aluminium powder A is 10 ~ 30%, the percentage by weight of aluminium powder B is 30 ~ 80%, and surplus is aluminium powder C.The particle diameter of that resist warping additive is preferably less than 3 μm, can well be filled in and have in gap that above-mentioned particle diameter aluminium powder formed, namely better can alleviate the release of aluminium paste stress in sintering process in local; The mixing of the aluminium powder of three kinds of different average grain diameters is adopted to make conductive phase, make the aluminium paste of preparation through silk screen printing, after drying and sinter into aluminium film, contribute to the raising of aluminium powder bulk density, the compactness extent of aluminum membranous layer in cell piece can be improved, thus improve the open circuit voltage of solar battery sheet.Meanwhile, the aluminum membranous layer of densification that cell piece has can also improve the wet-hot aging performance of cell piece.The improvement of above performance all contributes to the electricity conversion improving solar cell.
Preferred technical scheme is, by the percentages of aluminium powder total weight, the oxygen content of aluminium powder is less than 0.4%, is more preferably 0.2 ~ 0.35%, and at present, oxygen content also fails industrial volume production lower than the aluminium powder of 0.2%.Oxygen content is the oxide layer seldom measured due to outer layer covers of aluminium powder of 0.2 ~ 0.35%, is beneficial to the contact resistance reduced between aluminium powder and aluminium powder; In sintering process, the glass dust with suitable softening point can have sufficient time to wetting and carry aluminium powder and move, and contributes to improving the doping content of aluminium in the thickness of silicon-aluminum layer or silicon, and what contribute to improving solar cell opens pressure.
Preferred technical scheme is, the composition of described lead-free glass powder comprises by weight percentage: Bi
2o
330 ~ 50%, B
2o
310 ~ 20%, SiO
28 ~ 15%, ZnO10 ~ 30%, Sb
2o
35 ~ 10%, ZrO
20 ~ 3%, V
2o
51 ~ 5%, Al
2o
30.5 ~ 5%, BaO0.1 ~ 2% and SrO0 ~ 1%, the domain size distribution of glass dust is preferably 0.5 ~ 6 μm.
Preferred by glass dust component and percentage composition, makes it good to the wetability of silicon substrate and aluminium powder, the ohmic contact had with silicon substrate after sintering, the reliable adhesive force of tool; And the matched coefficients of thermal expansion of glass dust system and silicon substrate, after making sintering, silicon warp is little, reduces the fragment rate in cell piece manufacture.
Organic carrier comprises polymer and organic solvent, preferred technical scheme is, ethyl cellulose 3 ~ 10%, acetylbutyrylcellulose 2 ~ 8%, phenolic resins 1 ~ 10%, terpinol 30 ~ 50%, butyl carbitol acetate 15 ~ 30%, tributyl citrate 10 ~ 20%, butyl 3 ~ 7%, pump oil 1 ~ 5% and wetting dispersing agent 0.2 ~ 1%.Further be preferably, ethyl cellulose 7%, acetylbutyrylcellulose 5%, phenolic resins 5%, terpinol 41%, butyl carbitol acetate 18.7%, tributyl citrate 16%, butyl 4%, pump oil 3% and wetting dispersing agent BYK-1080.3%.
Preferred technical scheme is, described auxiliary agent comprises at least one in levelling agent, dispersant, defoamer and thixotropic agent.
Preferred technical scheme is, described levelling agent be selected from polyacrylic acid, triglycerin aliphatic acid is received, at least one in acetic acid butyl cellulose, dioctyl adipate sodium and poly dimethyl carboxylate sodium; Dispersant is be selected from least one in polyvinylpyrrolidone, softex kw, cetyl pyridinium, polyacrylamide, polyethylene alcohol ester, odium stearate and paraffin oil; Defoamer is be selected from least one in amide-type defoamer, polyethers defoamer and imines defoamer; Thixotropic agent is be selected from least one in rilanit special, polyamide wax micropowder, modification ureas thixotropic agent.
By to the screening of organic carrier component and the appropriate interpolation of auxiliary agent, make its to the wetting of powder granule and dispersive property good, not only have good screen printability, and volatilize in gradient due to organic solvent, after sintering, the densification of aluminium film is smooth.
Can be scattered in organic carrier better to make that resist warping additive, as preferred technical scheme, described that resist warping additive surface is in advance through the coated process of coupling agent or surfactant, described coupling agent is be selected from the one in silane coupler, titanate coupling agent, boric acid ester coupler, and surfactant is be selected from the one in sorbitan fatty acid ester, lecithin, polyethylene glycol and polyvinylpyrrolidone; The consumption of coupling agent or surfactant is 0.5 ~ 2% of that resist warping weight of additive.
The present invention has following advantages:
(1) by adding the pretreated that resist warping additive with negative expansion coefficient, between that resist warping additive and organic carrier, compatibility is good, can be uniformly dispersed in the gap that aluminium powder in slurry formed, along with the rising of temperature in sintering process, the microcosmic crystal of that resist warping additive shrinks along at least one axle, for the expanded by heating of aluminium powder provides cushion space, and then the thermal coefficient of expansion between aluminium back surface field and silicon chip is reached unanimity, after remarkable minimizing sintering between aluminium back surface field and silicon chip because thermal coefficient of expansion does not mate the warpage caused, and aluminium back surface field smooth surface, without obvious aluminium pill, aluminium buds etc. are bad.
(2) the solar cell aluminium paste of that resist warping additive is added, due to the optimization grating of aluminium powder and the screening of organic carrier component, the aluminium film dense uniform formed after sintering, wet-hot aging performance is good, poach test bubble-free, wiping simultaneously contacts overlapping aluminium membrane portions with back of the body silver electrode, there will not be dry linting phenomenon.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Embodiment 1
The recipe ingredient of the crystal silicon solar batteries aluminium paste of high conduction performance comprises by weight percentage: aluminium powder 65%, lead-free glass powder 1%, organic carrier 30%, that resist warping additive 3% and auxiliary agent 1%.
Wherein, aluminium powder specification: oxygen content 0.2%.With aluminium powder total weight, particle diameter collocation is: the aluminium powder A30% being less than 2 μm, 3 ~ 5 μm of aluminium powder B30% and 6 ~ 8 μm of aluminium powder C40%.Lead-free glass powder components based on weight percentage comprises: Bi
2o
330%, B
2o
320%, SiO
28%, ZnO30%, Sb
2o
36.4%, ZrO
20%, V
2o
55%, Al
2o
30.5%, BaO0.1% and SrO0%.
Organic carrier components based on weight percentage comprises: ethyl cellulose 7%, acetylbutyrylcellulose 5%, phenolic resins 5%, terpinol 41%, butyl carbitol acetate 18.7%, tributyl citrate 16%, butyl 4%, pump oil 3% and wetting dispersing agent BYK-1080.3%; That resist warping additive: ThP
2o
7, silane coupler surface treatment; Auxiliary agent is made up of dioctyl adipate sodium, polyethylene alcohol ester, polyether silicone oil and polyamide wax micropowder.
Embodiment 2
Aluminium powder 70%, lead-free glass powder 3.5%, organic carrier 24.4%, that resist warping additive 2% and auxiliary agent 0.1%.
Wherein, aluminium powder specification: oxygen content is 0.25%.With aluminium powder total weight, particle diameter collocation is: the aluminium powder A10% being less than 2 μm, 3 ~ 5 μm of aluminium powder B80% and 6 ~ 8 μm of aluminium powder C10%.Lead-free glass powder components based on weight percentage comprises: Bi
2o
340%, B
2o
313%, SiO
215%, ZnO10%, Sb
2o
310%, ZrO
21%, V
2o
53%, Al
2o
35%, BaO2% and SrO1%.
The recipe ingredient of organic carrier and percentage composition are with embodiment 1; That resist warping additive: ThP
2o
7and UP
2o
7deng mass mixing, and carry out surface treatment by boric acid ester coupler; Auxiliary agent is made up of poly dimethyl carboxylate sodium, cetyl pyridinium, two palmityl ethylenediamines and modification ureas thixotropic agent.
Embodiment 3
Aluminium powder 75%, lead-free glass powder 5%, organic carrier 17.5%, that resist warping additive 0.5% and auxiliary agent 2%.
Wherein, aluminium powder specification: oxygen content is 0.30%.With aluminium powder total weight, particle diameter collocation is: the aluminium powder A20% being less than 2 μm, 3 ~ 5 μm of aluminium powder B70% and 6 ~ 8 μm of aluminium powder C10%.Lead-free glass powder components based on weight percentage comprises: Bi
2o
350%, B
2o
310%, SiO
212%, ZnO14.5%, Sb
2o
35%, ZrO
23%, V
2o
51%, Al
2o
33%, BaO1%, SrO0.5%.
The recipe ingredient of organic carrier and percentage composition are with embodiment 1; That resist warping additive: HfW
2o
8, via polyvinylpyrrolidone surface treatment; Auxiliary agent is made up of dioctyl adipate sodium, odium stearate, polyethers defoamer and polyamide wax micropowder.
Embodiment 4
Aluminium powder 78%, lead-free glass powder 2%, organic carrier 15%, that resist warping additive 2% and auxiliary agent 3%.
Wherein, aluminium powder specification: oxygen content is 0.35%.With aluminium powder total weight, particle diameter collocation is: the aluminium powder A15% being less than 2 μm, 3 ~ 5 μm of aluminium powder B55% and 6 ~ 8 μm of aluminium powder C30%.Lead-free glass powder components based on weight percentage comprises: Bi
2o
339%, B
2o
316%, SiO
210%, ZnO22%, Sb
2o
37.5%, ZrO
21.5%, V
2o
52%, Al
2o
31%, BaO0.5%, SrO0.5%.
The recipe ingredient of organic carrier and percentage composition are with embodiment 1; That resist warping additive: Y
2w
3o
12and Lu
2w
3o
12with weight ratio 1:2 mixing, and by polyethylene glycol surface preparation; Auxiliary agent is received by triglycerin aliphatic acid, polyacrylamide, polyvinylpyrrolidone, polyether silicone oil and rilanit special form.
Embodiment 5
That resist warping additive is by HfW
2o
8and Y
2mo
3o
12with weight ratio 1:2 mixing, and by polyethylene glycol surface preparation, all the other are all with embodiment 4.
Comparative example 1
Aluminium powder 75%, lead-free glass powder 5%, organic carrier 18% and auxiliary agent 2%, compared with embodiment 3, do not add that resist warping additive, and in corresponding increase organic carrier, the content 0.5%(17.5% of organic solvent is to 18%).All the other are all with embodiment 3.
Comparative example 2
Aluminium powder 78%, lead-free glass powder 2%, organic carrier 13% and auxiliary agent 3%, compared with embodiment 4, add that resist warping additive 4%, and in corresponding minimizing organic carrier, the content 2%(15% of organic solvent is to 13%).All the other are all with embodiment 4.
Comparative example 3
Compared with embodiment 3, selected aluminium powder is common aluminium powder, oxygen content >0.4%, and all the other are all with embodiment 3.
The printing of aluminium paste on polysilicon chip, sintering test
Conducting aluminum paste is adopted 250 order web plate silk screens be printed on respectively polysilicon chip (specification: 156 × 156mm, thickness is 180 ± 10 μm, printing weight be 1.3 grams, every sheet slurry, bake out temperature is 200 DEG C, drying time is 2 minutes, and reenter chain-conveyer furnace sintering, (sintering temperature is zone1:500 DEG C to sintering temperature distribution gradient, zone2:570 DEG C, zone3:620 DEG C, zone4:700 DEG C, zone5:830 DEG C, zone6:950 DEG C), belt speed is 210ipm.Namely solar battery sheet is obtained after coming out of the stove.And the used for solar batteries positive silver of aluminium paste in above-described embodiment and comparative example and same model and back silver paste are arranged in pairs or groups.Certain slurry of each test adopts 50 cell pieces, and test data gets its mean value.
Cell piece aluminium back surface field performance test content:
(1) aluminium film surface situation: with examination by sensory organs, observe whether have stainless steel guipure impression, aluminium film surface situation, whether smooth, with or without aluminium pill, aluminium bud; Equal nothing is designated as OK.
(2) cell piece degree of crook: the degree of crook clearance gauge of cell piece is measured, unit is mm.
(3) electrical property: the open circuit voltage of cell piece, electricity conversion solar cell piece special photoelectric simulation test instrument test, carries out test according to method disclosed in IEC904-1 to each cell piece and obtains.Test condition is standard test condition (STC): light intensity: 1000W/m
2; Spectrum: AM1.5G; Temperature: 25 DEG C.
(4) poach performance: the cell piece being printed with aluminium paste is placed in 85 DEG C of distilled water, poach 10min, observes the speed that cell piece surface has bubble-free to emerge and emerges.
Test result is listed in the table below:
The compactness extent of the aluminium back surface field having bubble-free to follow sintering to be formed in poach performance test is relevant, and bubble-free illustrates that the compactness of aluminium back surface field is good; Cell piece after poach is observed, the wet-hot aging performance of cell piece can be investigated.
The silicon solar cell back side aluminium paste produced according to above-described embodiment, at raising electrical property with improve between outward appearance and poach performance and found balance point.By selecting the interpolation of aluminium powder and that resist warping additive, open circuit voltage and the electricity conversion of cell piece are improved, and angularity is little; Meanwhile, by the size grading of aluminium powder and the screening of organic carrier, make the aluminum membranous layer dense uniform after sintering, smooth, without aluminium pill, aluminium bud, water boiling resistance performance is good.
Only consider the order of magnitude of that resist warping additive negative expansion coefficient and occur that negative expansion character temperature range and cell piece sintering temperature match accuracy, first preferred Y
2mo
3o
12(RT ~ 800 DEG C, negative expansion coefficient-9.36 × 10
-6/ DEG C) and HfW
2o
8(-273 ~ 777 DEG C, negative expansion coefficient-8.7 × 10
-6/ DEG C), be secondly M
2n
3o
12the molybdate of Er, Yb and Lu, be finally M
2n
3o
12tungstates (200 ~ 800/900 DEG C, negative expansion coefficient-7.34 ~-6.18 × 10
-6/ DEG C), ThP
2o
7(300 ~ 1200 DEG C, negative expansion coefficient-8.1 × 10
-6/ DEG C) and UP
2o
7(600 ~ 1500 DEG C, negative expansion coefficient-6.3 × 10
-6/ DEG C).
As preferably, find through thermogravimetric analysis, polyvinylpyrrolidone is as the coated that resist warping additive of high molecular surfactant, without polyvinylpyrrolidone Ash residue in aluminium back surface field after sintering, not only can not have an impact to the electric conductivity of aluminium back surface field after sintering, while regulating that resist warping additive and other component compatibilities of slurry as covering, the toughness and the plasticity that participate in regulating aluminium paste can also be worked in coordination with the resin in organic carrier.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. the crystal silicon solar batteries aluminium paste of a high conduction performance, it is characterized in that, its recipe ingredient comprises by weight percentage: aluminium powder 65 ~ 78%, lead-free glass powder 1 ~ 5%, organic carrier 15 ~ 30%, that resist warping additive 0.5 ~ 3% and auxiliary agent 0.1 ~ 3%, and the percentage by weight sum of each component is 100%.
2. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 1, is characterized in that, described that resist warping additive comprises component A and/or B component, and described component A is for being selected from ThP
2o
7, UP
2o
7and HfW
2o
8in at least one, B component is M by chemical general formula
2n
3o
12one or more mix, in chemical general formula, M is for being selected from Yb
3+, Er
3+, Y
3+, Lu
3+in one, N is for being selected from W
6+, Mo
6+in one.
3. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 1 and 2, is characterized in that, the average grain diameter of that resist warping additive is less than 3 μm; Aluminium powder is spherical or class is spherical, purity is greater than 99.8%, aluminium powder be the aluminium powder A, the average grain diameter that are less than 2 μm is 3 ~ 5 μm of aluminium powder B and average grain diameter by average grain diameter is that 6 ~ 8 μm of aluminium powder C mix, in aluminium powder total weight 100%, the percentage by weight of aluminium powder A is 10 ~ 30%, the percentage by weight of aluminium powder B is 30 ~ 80%, and surplus is aluminium powder C.
4. the crystal silicon solar batteries aluminium paste of the high conduction performance according to claim 1 or 3, is characterized in that, by the percentages of aluminium powder total weight, the oxygen content of aluminium powder is less than 0.4%.
5. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 1, is characterized in that, the composition of described lead-free glass powder comprises by weight percentage: Bi
2o
330 ~ 50%, B
2o
310 ~ 20%, SiO
28 ~ 15%, ZnO10 ~ 30%, Sb
2o
35 ~ 10%, ZrO
20 ~ 3%, V
2o
51 ~ 5%, Al
2o
30.5 ~ 5%, BaO0.1 ~ 2% and SrO0 ~ 1%, the domain size distribution of glass dust is 0.5 ~ 6 μm.
6. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 1, it is characterized in that, by weight percentage, described organic carrier comprises: ethyl cellulose 3 ~ 10%, acetylbutyrylcellulose 2 ~ 8%, phenolic resins 1 ~ 10%, terpinol 30 ~ 50%, butyl carbitol acetate 15 ~ 30%, tributyl citrate 10 ~ 20%, butyl 3 ~ 7%, pump oil 1 ~ 5% and wetting dispersing agent 0.2 ~ 1%.
7. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 6, it is characterized in that, the percentage composition of each component of organic carrier is more preferably, ethyl cellulose 7%, acetylbutyrylcellulose 5%, phenolic resins 5%, terpinol 41%, butyl carbitol acetate 18.7%, tributyl citrate 16%, butyl 4%, pump oil 3% and wetting dispersing agent BYK-1080.3%.
8. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 1, is characterized in that, described auxiliary agent comprises at least one in levelling agent, dispersant, defoamer and thixotropic agent.
9. the crystal silicon solar batteries aluminium paste of high conduction performance according to claim 1, it is characterized in that, described that resist warping additive is in advance through the coated process of coupling agent or surfactant, described coupling agent is be selected from the one in silane coupler, titanate coupling agent, boric acid ester coupler, and surfactant is be selected from the one in sorbitan fatty acid ester, lecithin, polyethylene glycol and polyvinylpyrrolidone; The consumption of coupling agent or surfactant is 0.5 ~ 2% of that resist warping weight of additive.
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| CN106158072A (en) * | 2016-08-30 | 2016-11-23 | 南通天盛新能源股份有限公司 | A kind of crystal-silicon solar cell low warpage back side aluminium paste |
| CN107778764A (en) * | 2016-08-26 | 2018-03-09 | 湖南利德电子浆料股份有限公司 | A kind of solar cell size organic carrier and preparation method thereof |
| CN108417290A (en) * | 2018-02-28 | 2018-08-17 | 江苏国瓷泓源光电科技有限公司 | A kind of solar cell aluminium paste and preparation method thereof |
| CN108428493A (en) * | 2018-04-08 | 2018-08-21 | 通威太阳能（安徽）有限公司 | A kind of unleaded crystal silicon solar batteries back field aluminum paste and preparation method thereof |
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| CN106158072A (en) * | 2016-08-30 | 2016-11-23 | 南通天盛新能源股份有限公司 | A kind of crystal-silicon solar cell low warpage back side aluminium paste |
| CN106158072B (en) * | 2016-08-30 | 2017-10-17 | 南通天盛新能源股份有限公司 | A kind of crystal-silicon solar cell low warpage back side aluminium paste |
| CN108417290A (en) * | 2018-02-28 | 2018-08-17 | 江苏国瓷泓源光电科技有限公司 | A kind of solar cell aluminium paste and preparation method thereof |
| CN108447623A (en) * | 2018-03-23 | 2018-08-24 | 江苏国瓷泓源光电科技有限公司 | Modified boron nitride replaces simple substance boron doping solar battery aluminum slurry and preparation method thereof |
| CN108428493A (en) * | 2018-04-08 | 2018-08-21 | 通威太阳能（安徽）有限公司 | A kind of unleaded crystal silicon solar batteries back field aluminum paste and preparation method thereof |
| CN110504045A (en) * | 2019-08-09 | 2019-11-26 | 江苏国瓷泓源光电科技有限公司 | A kind of crystal silicon solar batteries PERC aluminium paste of high-tensile strength and preparation method thereof |
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