CN102969040A - Back aluminum paste for silicon solar cell and preparation method of back aluminum paste - Google Patents
Back aluminum paste for silicon solar cell and preparation method of back aluminum paste Download PDFInfo
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- CN102969040A CN102969040A CN2012104292654A CN201210429265A CN102969040A CN 102969040 A CN102969040 A CN 102969040A CN 2012104292654 A CN2012104292654 A CN 2012104292654A CN 201210429265 A CN201210429265 A CN 201210429265A CN 102969040 A CN102969040 A CN 102969040A
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Abstract
The invention relates to a back aluminum paste for a silicon solar cell and a preparation method of the back aluminum paste. The back aluminum paste is characterized by comprising, by weight, 0.6% to 2.5% of glass powders, 20% to 30% of aluminum powders 2, 12% to 20% of organic carriers, 3% to 8% of solvents, 0.4% to 2.5% of dispersing agents, 0.6% to 1.5% of inorganic additives and the balance aluminum powders 1. The back aluminum paste for the silicon solar cell has the advantages that the sintering temperature is low, the high-temperature region time is short, the energy is saved, high photoelectric converting efficiency can be achieved, and a test proves that the average photoelectric converting efficiency of the back aluminum paste prepared by the method is improved by 0.2%.
Description
Technical field
The present invention relates to a kind of silicon solar cell back aluminum slurry and preparation method thereof.
Background technology
In recent years, along with the growing tension of the conventional energy resources such as coal, oil, natural gas, oneself is extremely urgent to develop reproducible new forms of energy, and various countries furnish a huge amount of money for to develop various new forms of energy one after another, this wherein the development of solar energy attract attention the most and outstanding with the fastest developing speed with solar cell.According to statistics, global solar battery industry 1994-2004 increased by 17 times in 10 years, and manufacture of solar cells mainly is distributed in Japan, Europe and the U.S..Domestic research to solar cell is started in 1958, and at present, oneself becomes the main manufacture of solar cells state in the whole world China.Because the Chinese government extremely payes attention to solar power generation.China is expected to as the U.S., can start a huge market.Solar energy power generating can occupy the important seat of world energy sources consumption in the near future, not only wants the Substitute For Partial conventional energy resource, and will become the main body of world energy supplies.
Undoubtedly, be accompanied by shooting up of photovoltaic industry, also will increase sharply to the demand of electric slurry, especially the thick-film electronic aluminium paste of high temperature sintering type, be the main slurry that present electrode of solar battery uses, the market demand of following thick-film electronic slurry product is with expanding day.
Existing silica-based solar cell generally is printed on the silicon substrate by the electrocondution slurry that will contain conductive metal powder, glass dust and organic carrier, carries out drying and fires the preparation electrode.The front electrode of solar cell silicon substrate is generally negative pole, and the electrocondution slurry of coating is generally conductive silver paste; Backplate is generally positive pole, and the electrocondution slurry of coating is generally conducting aluminum paste.
Summary of the invention
It is low that one of purpose of the present invention provides a kind of sintering temperature, the silicon solar cell back aluminum slurry that transformation efficiency is high;
Two of purpose of the present invention provides a kind of preparation method of above-mentioned back aluminum slurry.
A kind of silicon solar cell back aluminum slurry, its special feature are that the percentage composition meter consists of by weight: glass dust 0.6-2.5%, aluminium powder 2 accounts for 20-30%, organic carrier 12-20%, solvent 3-8%, dispersant 0.4-2.5%, inorganic additive 0.6-1.5%, surplus is aluminium powder 1.
Wherein glass dust is low-melting point lead-less glasses powder, and the composition of glass dust is: BaCO
35-15%, SiO
210-20%, BaO20-40%, Al
2O
31-8%, ZnO1-5%, KCO
31-3%, surplus is B
2O
3, the median particle diameter D of glass dust
50Be 0.5-3 μ m, fusing point is 590-650 ℃.
Further, wherein the preparation method of glass dust is: all raw materials are proportionally mixed, pack in the porcelain crucible, put into silicon carbide rod furnace, be incubated half an hour after intensification is preheating to 550～650 ℃, rise to again 1000～1100 ℃, melting half an hour, water is floating to be filtered, and will obtain the bead ball grinder of packing into, ball milling 48h or more than, then filter, dry getting final product.
Wherein organic carrier by weight the percentage composition meter consist of: ethyl cellulose STD-20 accounts for 10-20%, and the butyl carbitol acetate accounts for 80-90%.
Wherein solvent adopts the butyl carbitol acetate.
Wherein dispersant is that Tego610s and BYK-111 are with the mixture of arbitrary proportion.
Wherein inorganic additive is that magnesium carbonate and boron oxide are with the mixture of arbitrary proportion.
Wherein aluminium powder 1 is ball aluminum powder, particle diameter D
50Be 5-7 μ m, purity＞99.9%; Aluminium powder 2 is ball aluminum powder, particle diameter D
50Be 1-2 μ m, purity＞99.9%.
A kind of above-mentioned silicon solar cell preparation method of back aluminum slurry, its special feature is, comprises the steps:
(1) first with two kinds of in proportion weighings of aluminium powder, adds in the roller bottle machine and mixed 1-4 hour;
(2) solvent and resin are added in proportion, use 60-80 ℃ of heating water bath in container, and use and stir, the control rotating speed is 300-600 rev/min, and insulated and stirred obtains organic carrier until resin dissolves fully;
(3) weighing glass dust and inorganic additive add the organic carrier of dispersant and 60-80%, mix at mixer, and the aluminium powder that all the other organic carriers and step (1) obtain mixes, and it is even to add solvent again;
(4) first rolling contains the glass dust part, then add contain the aluminium powder part to rolling evenly and fineness namely obtain the silicon solar cell back aluminum slurry less than or equal to 15 μ m.
Rolling adopts three-roller in the step (4).
The present invention relates to a kind of silicon solar cell back aluminum slurry, its sintering temperature is low, and the high-temperature region time is short, both saved the energy, can reach higher electricity conversion again, through evidence, adopt the aluminium paste average photoelectric conversion improved efficiency 0.2% of the inventive method preparation.
Embodiment
Embodiment 1:
A kind of silicon solar cell back aluminum slurry consists of by mass percentage:
Surplus is aluminium powder 1, and aluminium powder 1 is ball aluminum powder, particle diameter (D
50) be 5-7 μ m, purity 99.95%.
The composition of glass dust is: B
2O
350%, BaCO
35%, SiO
211%, BaO20%, Al
2O
38%, ZnO4%, KCO
32%.Fusing point is 630 ℃.The preparation method of glass dust is: all raw materials are proportionally mixed, pack in the porcelain crucible, put into silicon carbide rod furnace, be incubated half an hour after intensification is preheating to 600 ℃, rise to again 1050 ℃, melting half an hour, water is floating to be filtered, and will obtain the bead ball grinder of packing into, ball milling 50h, then filter, dry and to obtain glass dust, its median particle diameter D
50Be 0.5-3 μ m.
With two kinds of in proportion weighings of aluminium powder, add in the roller bottle machine and mixed 2 hours first; Solvent and resin (ethyl cellulose STD-20 and butyl carbitol acetate) are added in proportion, use 75 ℃ of heating water baths in container, and use electric stirring, rotating speed is 500 rev/mins, add thermal agitation 3 hours, and obtained organic carrier until resin dissolves fully.Weighing glass dust and inorganic additive add the organic carrier of dispersant and 80%, mix at mixer.All the other organic carriers and aluminium powder mix, and it is even to add solvent again.Use three-roller elder generation rolling to contain the glass dust part, then add contain the aluminium powder part to rolling evenly and fineness less than 15 μ m.
Embodiment 2:
A kind of silicon solar cell back aluminum slurry consists of by mass percentage:
The composition of glass dust is: B
2O
320%, BaCO
35%, SiO
224%, BaO40%, Al
2O
31%, Bi
2O
35%, ZnO5%.The median particle diameter D of glass dust
50Be 0.5-3 μ m.Fusing point is 590 ℃.
With in proportion weighing of aluminium powder, add in the roller bottle machine and mixed 2 hours first; Solvent and resin are added in proportion, use 75 ℃ of heating water baths in container, and use electric stirring, rotating speed is 500 rev/mins, adds thermal agitation 3 hours, until resin dissolves fully.Weighing glass dust and inorganic additive add dispersant and part carrier (carrier total amount 70%).Mix at mixer.Part carrier and aluminium powder mix in addition, and it is even to add solvent again.Use three-roller elder generation rolled glass powder part, then add the aluminium powder part to rolling evenly and fineness less than 15 μ m.Other is identical with embodiment 1.
Embodiment 3:
A kind of silicon solar cell back aluminum slurry consists of by mass percentage:
The composition of glass dust is: B
2O
340%, BaCO
310%, SiO
215%, BaO25%, Al
2O
37%, ZnO1%, KCO
32%.The median particle diameter D of glass dust
50Be 0.5-3 μ m.Fusing point is 650 ℃.
With in proportion weighing of aluminium powder, add in the roller bottle machine and mixed 2 hours first; Solvent and resin are added in proportion, use 75 ℃ of heating water baths in container, and use electric stirring, rotating speed is 500 rev/mins, adds thermal agitation 3 hours, until resin dissolves fully.Weighing glass dust and inorganic additive add dispersant and part carrier (carrier total amount 60%), mix at mixer.Part carrier and aluminium powder mix in addition, and it is even to add solvent again.Use three-roller elder generation rolled glass powder part, then add the aluminium powder part to rolling evenly and fineness less than 15 μ m.Other is identical with embodiment 1.
Claims (10)
1. a silicon solar cell back aluminum slurry is characterized in that, the percentage composition meter consists of by weight: glass dust 0.6-2.5%, aluminium powder 2 accounts for 20-30%, organic carrier 12-20%, solvent 3-8%, dispersant 0.4-2.5%, inorganic additive 0.6-1.5%, surplus is aluminium powder 1.
2. a kind of silicon solar cell back aluminum slurry as claimed in claim 1, it is characterized in that: wherein glass dust is low-melting point lead-less glasses powder, and the composition of glass dust is: BaCO
35-15%, SiO
210-20%, BaO20-40%, Al
2O
31-8%, ZnO1-5%, KCO
31-3%, surplus is B
2O
3, the median particle diameter D of glass dust
50Be 0.5-3 μ m, fusing point is 590-650 ℃.
3. a kind of silicon solar cell back aluminum slurry as claimed in claim 2, it is characterized in that: wherein the preparation method of glass dust is: all raw materials are proportionally mixed, pack in the porcelain crucible, put into silicon carbide rod furnace, be incubated half an hour after intensification is preheating to 550～650 ℃, rise to again 1000～1100 ℃, melting half an hour, water is floating to be filtered, and will obtain the bead ball grinder of packing into, ball milling 48h or more than, then filter, dry getting final product.
4. a kind of silicon solar cell back aluminum slurry as claimed in claim 1 is characterized in that: wherein organic carrier by weight the percentage composition meter consist of: ethyl cellulose STD-20 accounts for 10-20%, and the butyl carbitol acetate accounts for 80-90%.
5. a kind of silicon solar cell back aluminum slurry as claimed in claim 1 is characterized in that: wherein solvent adopts the butyl carbitol acetate.
6. a kind of silicon solar cell back aluminum slurry as claimed in claim 1 is characterized in that: wherein dispersant is that Tego610s and BYK-111 are with the mixture of arbitrary proportion.
7. a kind of silicon solar cell back aluminum slurry as claimed in claim 1 is characterized in that: wherein inorganic additive is that magnesium carbonate and boron oxide are with the mixture of arbitrary proportion.
8. a kind of silicon solar cell back aluminum slurry as claimed in claim 1 is characterized in that: wherein aluminium powder 1 is ball aluminum powder, particle diameter D
50Be 5-7 μ m, purity＞99.9%; Aluminium powder 2 is ball aluminum powder, particle diameter D
50Be 1-2 μ m, purity＞99.9%.
9. the described silicon solar cell of any one is characterized in that with the preparation method of back aluminum slurry in the claim 1 to 8, comprises the steps:
(1) first with two kinds of in proportion weighings of aluminium powder, adds in the roller bottle machine and mixed 1-4 hour;
(2) solvent and resin are added in proportion, use 60-80 ℃ of heating water bath in container, and use and stir, the control rotating speed is 300-600 rev/min, and insulated and stirred obtains organic carrier until resin dissolves fully;
(3) weighing glass dust and inorganic additive add the organic carrier of dispersant and 60-80%, mix at mixer, and the aluminium powder that all the other organic carriers and step (1) obtain mixes, and it is even to add solvent again;
(4) first rolling contains the glass dust part, then add contain the aluminium powder part to rolling evenly and fineness namely obtain the silicon solar cell back aluminum slurry less than or equal to 15 μ m.
10. a kind of silicon solar cell as claimed in claim 9 is characterized in that: rolling employing three-roller in the step (4) with the preparation method of back aluminum slurry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104292654A CN102969040A (en) | 2012-10-31 | 2012-10-31 | Back aluminum paste for silicon solar cell and preparation method of back aluminum paste |
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|---|---|---|---|
| CN2012104292654A CN102969040A (en) | 2012-10-31 | 2012-10-31 | Back aluminum paste for silicon solar cell and preparation method of back aluminum paste |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289804A (en) * | 2015-11-18 | 2016-02-03 | 江苏泓源光电科技股份有限公司 | Preparation method of superfine boron powder dispersion liquid and superfine boron powder dispersion liquid |
| CN105679410A (en) * | 2016-04-26 | 2016-06-15 | 江阴市天邦涂料股份有限公司 | High-adhesion-stability silver-aluminum slurry for solar battery |
| CN106898410A (en) * | 2017-01-18 | 2017-06-27 | 常州大学 | A kind of method of lifting PERC solar cell aluminium paste performances |
| 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 |
| CN108877988A (en) * | 2018-06-14 | 2018-11-23 | 扬州鑫晶光伏科技有限公司 | High-performance crystal silicon solar back field aluminum paste material and preparation method thereof and crystal silicon solar batteries prepared therefrom |
| CN109755329A (en) * | 2018-12-11 | 2019-05-14 | 苏州腾晖光伏技术有限公司 | A kind of preparation method of solar battery |
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| WO2010117207A2 (en) * | 2009-04-07 | 2010-10-14 | Lg Innotek Co., Ltd. | Paste and solar cell using the same |
| CN102262917A (en) * | 2011-07-19 | 2011-11-30 | 彩虹集团公司 | Back aluminium paste for crystalline silicon solar battery and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289804A (en) * | 2015-11-18 | 2016-02-03 | 江苏泓源光电科技股份有限公司 | Preparation method of superfine boron powder dispersion liquid and superfine boron powder dispersion liquid |
| CN105679410A (en) * | 2016-04-26 | 2016-06-15 | 江阴市天邦涂料股份有限公司 | High-adhesion-stability silver-aluminum slurry for solar battery |
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| CN106898410A (en) * | 2017-01-18 | 2017-06-27 | 常州大学 | A kind of method of lifting PERC solar cell aluminium paste performances |
| CN106898410B (en) * | 2017-01-18 | 2019-03-22 | 常州大学 | A kind of aluminium paste and preparation method thereof promoting PERC solar cell properties |
| 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 |
| CN108877988A (en) * | 2018-06-14 | 2018-11-23 | 扬州鑫晶光伏科技有限公司 | High-performance crystal silicon solar back field aluminum paste material and preparation method thereof and crystal silicon solar batteries prepared therefrom |
| CN109755329A (en) * | 2018-12-11 | 2019-05-14 | 苏州腾晖光伏技术有限公司 | A kind of preparation method of solar battery |
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