CN110423012A - A kind of glass powder and preparation method for PERC aluminium paste - Google Patents
A kind of glass powder and preparation method for PERC aluminium paste Download PDFInfo
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- CN110423012A CN110423012A CN201910733550.7A CN201910733550A CN110423012A CN 110423012 A CN110423012 A CN 110423012A CN 201910733550 A CN201910733550 A CN 201910733550A CN 110423012 A CN110423012 A CN 110423012A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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Abstract
The invention discloses a kind of glass powders and preparation method for PERC aluminium paste, the raw material of the glass powder is count by weight percentage, including bismuth oxide 5-15%, lead oxide 0% or 5%-10%, boron oxide 20-30%, vanadic anhydride 20-30%, zinc oxide 3-10%, barium monoxide 15-25%, calcium oxide and/or magnesia 0-5%, aluminum phosphate and/or trbasic zinc phosphate 0-6%, aluminium oxide 0-3%；The sum of each component weight percent is 100%.Pass through the Proper Match of different component, glass powder obtained melts the melt good leveling property to be formed, there are good wetability and caking property to silicon substrate and aluminium powder, it is small to PERC cell piece backside passivation film corrosivity, it can guarantee excellent adhesive force in the case where not influencing passivation effect, solar PE RC cell photoelectric transformation efficiency can be significantly improved.
Description
Technical field
The present invention relates to photovoltaic slurry cryogenic glass powders, and in particular to a kind of glass powder and preparation for PERC aluminium paste
Method.
Background technique
The difference core of PERC and conventional photovoltaic battery is to increase backside passivation film to improve transfer efficiency.PERC battery
The potential gradient for spanning P-N junction is maximized, this flowing for making electronics more stable reduces electron recombination, higher to obtain
Level of efficiency.
PERC cell metallization technique can still use silk-screen printing technique, but PERC cell backside structure is passivated because increasing
Layer and changed, therefore, the requirement different from conventional batteries slurry is proposed to the performance of electrocondution slurry.It is led in conventional
During electrit starches back side localized metallic, due to having passivating film compared with the bismuth oxide of strong corrosive and containing for lead oxide in component
Amount has stronger damaging action to passivating film, therefore, can encounter Al-BSF cavity problem, i.e. localized metallic connects 50% or so
The not formed Al-BSF in region is touched, silicon dissolves into aluminium and forms cavity, will cause the raising of contact resistance and the decline of fill factor.
Summary of the invention
It is an object of the present invention to overcome defect existing in the prior art, a kind of prepare simply, to passivating film corruption is provided
The glass powder for PERC aluminium paste that corrosion is small, adhesive force is excellent.
To achieve the above object, the technical scheme is to design a kind of glass powder for PERC aluminium paste, the glass
The raw material of glass powder count by weight percentage, including bismuth oxide 5-15%, lead oxide 0% or 5%-10%, boron oxide 20-
30%, vanadic anhydride 20-30%, zinc oxide 3-10%, barium monoxide 15-25%, calcium oxide and/or magnesia 0-5%, phosphoric acid
Aluminium and/or trbasic zinc phosphate 0-6%, aluminium oxide 0-3%；The sum of each component weight percent is 100%.
In formula glass structure formed body in bismuth oxide and lead oxide have passivating film compared with strong corrosive, and boron oxide and
Vanadic anhydride does not have corrosiveness to passivating film, and fusing point is low also has both excellent levelability.Therefore, with conventional glass frit phase
Than reducing the content of bismuth oxide and lead oxide, increasing the content of boron oxide and vanadic anhydride, be conducive to reduce glass powder to blunt
Change the corrosion of film, while silicon substrate and aluminium powder can be soaked well after also making glass melting.
Boron oxide and vanadic anhydride are anoxic body, therefore, are supplied oxygen using barium monoxide and zinc oxide.Due to barium in barium monoxide
Atom is big, and polarization force is strong, although barium monoxide is ionic compound, can ionize completely, the mobility of free oxygen is not strong.
However, zinc oxide is since zinc is transition metal, oxygen delivery capacity is also not very strong.Therefore, then to add a small amount of support capacity strong
Magnesia or calcium oxide keep oxygen delivery capacity more preferable, more sufficiently.
Aluminium oxide can the glass of fluxing, can also improve the physical mechanical property of glass, aluminum phosphate or trbasic zinc phosphate can also help
Molten glass, moreover it is possible to which playing improves the active ability of glass surface and interface, the knot of reinforcing glass and PERC cell piece silicon substrate and aluminium powder
Conjunction ability obtains stable glass powder through water quenching, ball milling after being melted by Muffle furnace.
Further preferred technical solution is also, which is characterized in that the bismuth oxide, boron oxide and vanadic anhydride three
Weight account for all oxides total weight percentage be greater than 55%.
Further preferred technical solution is in addition, the weight of both the barium monoxide, trbasic zinc phosphate and zinc oxide accounts for glass powder
The percentage of raw material gross weight is 20-31%.
Further preferred technical solution is in addition, the weight of both the bismuth oxide and lead oxide accounts for glass dust raw material gross weight
The percentage of amount is less than 12%.
Prepare the method for the glass powder the following steps are included:
(1) amount weighs each component according to the proportion；
(2) above-mentioned raw materials are added in batch mixer and are uniformly mixed obtained mixed powder, the mixed powder is packed into quartz
Crucible, and be put into baking oven and toast；
(3) above-mentioned feed powder is put into Muffle furnace and is melted becomes glass metal；
(4) glass metal is poured into pure water, glass particle is prepared in water quenching；
(5) ball grinder is added after drying glass particle, zirconia ball and medium isopropanol ball milling is added；
(6) glass powder after above-mentioned ball milling is screened using 500 mesh screens, drying crushes re-sieving, obtains median
D50 is 1.5-2 μm, dry glass powder of the maximum particle diameter D100 less than 15 μm.
Further preferred technical solution in addition, in the step (2) baking temperature control in 200 DEG C, baking time be
2h。
Further preferred technical solution is in addition, smelting temperature is 1000-1200 DEG C in the step (3), soaking time
For 1-2h.
Further preferred technical solution in addition, in the step (5) zirconia ball, glass particle and isopropanol ratio
For 6-10:1:1.
Further preferred technical solution is in addition, ball milling frequency is 20-24Hz, Ball-milling Time 8- in the step (5)
16h。
The advantages and beneficial effects of the present invention are: Proper Match of the present invention by different component, is prepared for a kind of use
In the glass powder of PERC aluminium paste, which melts the melt good leveling property to be formed, and has good wetting to silicon substrate and aluminium powder
Property and caking property, it is minimum to PERC cell piece backside passivation film corrosivity, it does not influence to can guarantee in the case where passivation effect excellent
Adhesive force, solar PE RC cell photoelectric transformation efficiency can be significantly improved.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, and following embodiment is only used for
Clearly illustrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment one:
In embodiments of the present invention, the raw material of the glass powder, includes: bismuth oxide 10% by weight, boron oxide 24%,
Vanadic anhydride 26%, zinc oxide 6%, barium monoxide 24%, calcium oxide 3%, aluminum phosphate 5%, aluminium oxide 2%.
Prepare the organic bond the following steps are included:
(1) amount weighs each component according to the proportion；
(2) required raw material is added in batch mixer and mixes 20min, mixed powder is made, mixed powder is packed into quartzy earthenware
Crucible, and it is put into baking oven baking, baking temperature control is at 200 DEG C, baking time 2h；
(3) above-mentioned feed powder is put into Muffle furnace to be melted, temperature is 1100 DEG C, and soaking time 1h is melted into glass metal；
(4) glass metal is poured into 25 DEG C of pure water, after water quenching obtains glass particle, is dried at 150 DEG C；
(5) ball grinder is added in the glass particle after above-mentioned drying, using zirconia ball and isopropyl alcohol dispersant ball milling, oxygen
Change zirconium ball, isopropanol and glass particle ratio are 10:1:1, and ball milling frequency is 20-24Hz, Ball-milling Time 12h；
(6) glass powder after above-mentioned ball milling is screened, drying using 500 mesh screens, it is dry less than 2 μm obtains partial size D50
Dry glass powder.
Glass powder glass transition temperature made from the above method is 540 DEG C, and the PERC aluminium paste that this glass powder is prepared prints
Brush is overlying on PERC solar battery sheet surface, and after sintering, appearance is good, and warpage is less than 1.8mm, and test value of thrust is greater than 20N.In
20min is boiled in 85 DEG C of water, takes out situation of the observation without the nigrescence that hazes.Meanwhile testing the electrical property of silicon wafer after sintering, data result
Such as table 1.Compared with producing line normal process, transformation efficiency improves 0.06%, and the efficiency of solar cell module has obtained significantly mentioning
It rises.
The electrical property result of 1 embodiment one of table
| Item | EF (%) | UOC(V) | ISC(A) | RSC(Ω) | RS(Ω) | FF (%) |
| Comparison | 21.2 | 0.664 | 9.685 | 52.1 | 0.0022 | 80.47 |
| 1 sample of embodiment | 21.26 | 0.666 | 9.688 | 58.96 | 0.0021 | 80.52 |
Note: EF is transformation efficiency；UOC is open-circuit voltage；ISC is short circuit current；RSC is parallel resistance；RS is series electrical
Resistance；FF is fill factor.
Embodiment two
The raw material of the glass powder includes: bismuth oxide 8%, lead oxide 4%, boron oxide 22%, five oxidations two by weight
Vanadium 27%, zinc oxide 5%, barium monoxide 25%, magnesia 2%, trbasic zinc phosphate 4%, aluminium oxide 3%.
Prepare the organic bond the following steps are included:
(1) amount weighs each component according to the proportion；
(2) required raw material is added in batch mixer and mixes 20min, mixed powder is made, mixed powder is packed into quartzy earthenware
Crucible, and it is put into baking oven baking, baking temperature control is at 200 DEG C, baking time 2h；
(3) above-mentioned feed powder is put into Muffle furnace to be melted, temperature is 1050 DEG C, and time 1h is melted into glass metal；
(4) glass metal is poured into 25 DEG C of pure water, after water quenching obtains glass particle, is dried at 150 DEG C；
(5) ball grinder is added in the glass particle after drying, using zirconia ball and isopropyl alcohol dispersant ball milling, zirconium oxide
Ball, isopropanol and glass particle ratio are 10:1:1, and ball milling frequency is 20-24Hz, Ball-milling Time 14h；
(6) glass powder after above-mentioned ball milling is screened, drying using 500 mesh screens, it is dry less than 2 μm obtains partial size D50
Dry glass powder.
Glass powder glass transition temperature made from the above method is 530 DEG C, and the PERC aluminium paste that this glass powder is prepared prints
Brush is overlying on PERC solar battery sheet surface, and after sintering, appearance is good, and warpage is less than 1.8mm, and test value of thrust is greater than 20N.In
20min is boiled in 85 DEG C of water, takes out situation of the observation without the nigrescence that hazes.Meanwhile testing the electrical property of silicon wafer after sintering, data result
Such as table 2.Compared with producing line normal process, transformation efficiency improves 0.11%, and the efficiency of solar cell module has obtained significantly mentioning
It rises.
The electric performance test result of 2 embodiment two of table
| Item | EF (%) | UOC(V) | ISC(A) | RSC(Ω) | RS(Ω) | FF (%) |
| Comparison | 21.77 | 0.674 | 9.809 | 30.41 | 0.0019 | 80.42 |
| 2 sample of embodiment | 21.88 | 0.674 | 9.786 | 52.67 | 0.0018 | 80.67 |
Embodiment three
The raw material of the glass powder includes: bismuth oxide 5%, lead oxide 6%, boron oxide 26%, five oxidations two by weight
Vanadium 21%, zinc oxide 8%, barium monoxide 23%, calcium oxide 3%, trbasic zinc phosphate 6%, aluminium oxide 2%.
Prepare the organic bond the following steps are included:
(1) amount weighs each component according to the proportion；
(2) required raw material is added in batch mixer and mixes 20min, mixed powder is made, mixed powder is packed into quartzy earthenware
Crucible, and it is put into baking oven baking, baking temperature control is at 200 DEG C, baking time 2h；
(3) above-mentioned feed powder is put into Muffle furnace to be melted, temperature is 1050 DEG C, and time 1h is melted into glass metal；
(4) glass metal is poured into 25 DEG C of pure water, after water quenching obtains glass particle, is dried at 150 DEG C；
(5) ball grinder is added in the glass particle after drying, using zirconia ball and isopropyl alcohol dispersant ball milling, zirconium oxide
Ball, isopropanol and glass particle ratio are 10:1:1, and ball milling frequency is 20-24Hz, Ball-milling Time 10h；
(6) glass powder after above-mentioned ball milling is screened, drying using 500 mesh screens, it is dry less than 2 μm obtains partial size D50
Dry glass powder.
Glass powder glass transition temperature made from the above method is 530 DEG C, and the PERC aluminium paste that this glass powder is prepared prints
Brush is overlying on PERC solar battery sheet surface, and after sintering, appearance is good, and warpage is less than 1.8mm, and test value of thrust is greater than 20N.In
20min is boiled in 85 DEG C of water, takes out situation of the observation without the nigrescence that hazes.Meanwhile testing the electrical property of silicon wafer after sintering, data result
Such as table 3.Compared with producing line normal process, transformation efficiency improves 0.03%, and the efficiency of solar cell module is improved.
The electric performance test result of 3 embodiment three of table
| Item | EF (%) | UOC(V) | ISC(A) | RSC(Ω) | RS(Ω) | FF (%) |
| Comparison | 21.92 | 0.6685 | 9.975 | 262 | 0.00082 | 80.31 |
| 3 sample of embodiment | 21.95 | 0.6692 | 9.9743 | 327 | 0.00085 | 80.34 |
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of glass powder for PERC aluminium paste, which is characterized in that the raw material of the glass powder count by weight percentage, wraps
Include bismuth oxide 5-15%, lead oxide 0% or 5%-10%, boron oxide 20-30%, vanadic anhydride 20-30%, zinc oxide 3-
10%, barium monoxide 15-25%, calcium oxide and/or magnesia 0-5%, aluminum phosphate and/or trbasic zinc phosphate 0-6%, aluminium oxide 0-3%；
The sum of each component weight percent is 100%.
2. a kind of glass powder for PERC aluminium paste as described in claim 1, which is characterized in that the bismuth oxide, boron oxide
The percentage for accounting for all oxides total weight with the weight of vanadic anhydride three is greater than 55%.
3. a kind of glass powder for PERC aluminium paste as claimed in claim 2, which is characterized in that the barium monoxide and zinc oxide
The percentage that the weight of the two accounts for glass dust raw material total weight is 20-31%.
4. a kind of glass powder for PERC aluminium paste as claimed in claim 3, which is characterized in that the bismuth oxide and lead oxide
The weight of the two accounts for the percentage of glass dust raw material total weight less than 12%.
5. the method for preparing the glass powder as described in any one of claims 1 to 4, which comprises the following steps:
(1) amount weighs each component according to the proportion；
(2) above-mentioned raw materials are added in batch mixer and are uniformly mixed obtained mixed powder, the mixed powder is packed into silica crucible,
And it is put into baking oven and toasts；
(3) above-mentioned feed powder is put into Muffle furnace and is melted becomes glass metal；
(4) glass metal is poured into pure water, glass particle is prepared in water quenching；
(5) ball grinder is added after drying glass particle, zirconia ball and isopropyl alcohol dispersant ball milling is added；
(6) glass powder after above-mentioned ball milling is screened using 500 mesh screens, drying crushes re-sieving, obtains median D50
It is 1.5-2 μm, dry glass powder of the maximum particle diameter D100 less than 15 μm.
6. the preparation method of glass powder according to claim 5, which is characterized in that baking temperature controls in the step (2)
At 200 DEG C, baking time 2h.
7. the preparation method of glass powder according to claim 5, which is characterized in that smelting temperature is in the step (3)
1000-1200 DEG C, soaking time 1-2h.
8. the preparation method of glass powder according to claim 5, which is characterized in that zirconia ball, glass in the step (5)
The ratio of glass particle and isopropanol is 6-10:1:1.
9. the preparation method of glass powder according to claim 8, which is characterized in that ball milling frequency is in the step (5)
20-24Hz, Ball-milling Time 8-16h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159111A (en) * | 2020-08-28 | 2021-01-01 | 江苏国瓷泓源光电科技有限公司 | Lead-free and bismuth-free glass powder for PERC solar cell aluminum paste and preparation method thereof |
| CN114031299A (en) * | 2021-12-09 | 2022-02-11 | 西安宏星电子浆料科技股份有限公司 | Method for reducing hygroscopicity of glass powder |
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| CN107721183A (en) * | 2017-08-28 | 2018-02-23 | 广州市儒兴科技开发有限公司 | A kind of two-sided PERC back of solar cell electrode slurry glass dust and preparation method thereof |
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| US3787218A (en) * | 1970-10-27 | 1974-01-22 | Owens Illinois Inc | Zircon containing printing paste for overglaze coating of microelectronic circuits on ceramic substrates |
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| CN112159111A (en) * | 2020-08-28 | 2021-01-01 | 江苏国瓷泓源光电科技有限公司 | Lead-free and bismuth-free glass powder for PERC solar cell aluminum paste and preparation method thereof |
| CN114031299A (en) * | 2021-12-09 | 2022-02-11 | 西安宏星电子浆料科技股份有限公司 | Method for reducing hygroscopicity of glass powder |
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