CN101866705A - Back aluminum slurry for environment-friendly silicon-based solar battery and preparation method thereof - Google Patents
Back aluminum slurry for environment-friendly silicon-based solar battery and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a back aluminum slurry for an environment-friendly silicon-based solar battery for silk-screen printing and a preparation method thereof. The back aluminum slurry comprises the following components (in mass percentage): 1 to 4 percent of lead-free glass powder, 70 to 85 percent of spherical aluminum powder, 10 to 22 percent of organic carrier, 3 to 6 percent of solvent, 0.1 to 2 percent of plasticizer and 0.1 to 1 percent of dispersant, and the contact resistance and the warping degree of a battery sheet can be improved by changing the addition proportion of the glass powder and the spherical aluminum powder; the viscosity and the printing property of a product can be regulated by changing the addition proportion of the organic carrier and the solvent; the plasticity, the leveling property and the printing property of the product can be regulated by changing the addition proportion of the plasticizer; net blockage and net drying phenomena possibly occurring in printing are improved through a proper auxiliary agent, the organic carrier and the solvent; and the conversion efficiency of the solar battery prepared by adopting the slurry is markedly improved.
Description
Technical field
The invention belongs to technical field of electronic materials, be specifically related to a kind of environment-friendly silicon-based solar battery back side aluminium paste and preparation method thereof.
Background technology
Traditional fuel energy reduces day by day, and the harm that environment is caused becomes increasingly conspicuous, and the whole world also has 2,000,000,000 people to can not get normal energy supply simultaneously.In this time, the whole world has all been invested regenerative resource to sight, wishes that regenerative resource can change human energy resource structure, keeps long-range sustainable development.Solar energy forms the focus of paying attention to into people among this with its exclusive advantage.Abundant solar radiant energy is an important energy, is the energy inexhaustible, nexhaustible, pollution-free, cheap, that the mankind can freely utilize.Solar energy impinges arrives the power of earth surface up to 80,000,000,000,000 kilowatts (if 0.1% of the solar energy that shines ground is converted into electric energy, number turnover is 5%), and annual energy output can reach 5.6 * 10
12Kilowatt-hour, be equivalent at present 40 times of energy consumption in the world.
The technology of tool meaning became the focus that application is competitively studied in countries in the world during solar photovoltaic technology utilized as solar energy.The nearest 10 years speed increases with every year average 30%, nearest 3 years especially with annual speed rapid growth more than 50%.Solar energy power generating has become renewable energy source domain relaying wind power generation fast, the most maximum industry of industrialized development afterwards.The DisplaySearch of Market Research Corporation of America issue prediction claims that the global production capacity of solar battery cell in 2009 will increase by 56% than the last year, reach 17GW.From year July in January, 08 to 09, production capacity has increased 11.4GW.The said firm prediction, before 2013, the global production capacity of solar battery cell will be extended to 42GW with the speed increment of annual 49% by 2013 from now on.The ICInsights prediction, the equipment investment of solar cell manufacturer will be stepped into development track in 2011.Estimate will increase by 13% than the last year in 2011, reach 700,000,000 7,000 ten thousand dollars, 2012 year-on-years increase by 74%, reach 1,300,000,000 4,000 ten thousand dollars, will be extended to 1,900,000,000 7,000 ten thousand dollars (increasing by 47% than the last year) in 2013, surpass 1,400,000,000 7,000 ten thousand dollars of 08 year achievements.Estimate that factory's utilization of capacity also with steady-state growth, reached 63%, 2013 year and reaches 82% in 2011.The solar cell research of China is than external late 20 years, but, because nearest 10 years countries step up its investment in this respect year by year, the photovoltaic industry of China has had unprecedented development of advancing by leaps and bounds a: 2002-2007, China not only with 193.1% annual average rate of increase fast, develop in a healthy way, and formed a high level, international photovoltaic industry colony.
Summary of the invention
The objective of the invention is to prepare a kind of back aluminum slurry for environment-friendly silicon-based solar battery that is used for silk screen printing, this slurry has excellent printing, forms good Ohmic contact with silicon chip behind the sintering, and the silicon chip back side does not produce the pill of aluminium, battery sheet angularity is low, the cell conversion efficiency height.
Another object of the present invention provides a kind of preparation method of back aluminum slurry for environment-friendly silicon-based solar battery.
A kind of back aluminum slurry for environment-friendly silicon-based solar battery comprises following component composition (mass percentage content): lead-free glass powder 1-4%, ball-type aluminium powder 70 ~ 85%, organic carrier 10% ~ 22%, solvent 3% ~ 6%, plasticizer 0.1% ~ 2% and dispersant 0.1 ~ 1%,
Described lead-free glass powder is formed (mass percentage content): 40% ~ 70%Bi by following component
2O
3, 1% ~ 4%BaO, 10% ~ 20%SiO
2, 15% ~ 30%ZnO, 2% ~ 5%Al
2O
3,
Described organic carrier is formed (mass percentage content) by following component: one or more mixed solutions in 10% ~ 30% ethyl cellulose resin and 70% ~ 90% butyl carbitol, butyl carbitol amyl acetate, the terpinol,
Described solvent is one or more mixed solutions in butyl carbitol, butyl carbitol amyl acetate, the terpinol.
Described ball-type aluminium powder average grain diameter is that 2um ~ 6um, purity are greater than 99.50%.
Described plasticizer is one or more of o-phthalic acid dibutyl ester, dibutyl phthalate (DBP), dioctyl adipate;
Described dispersant is one or more of Tissuemat E, zinc stearate, microcrystalline wax.
A kind of preparation method of back aluminum slurry for environment-friendly silicon-based solar battery comprises following basic step:
Step 1): the preparation of lead-free glass powder
Material component and mass percent are: 40% ~ 70%Bi
2O
3, 1% ~ 4%BaO, 10% ~ 20%SiO
2, 15% ~ 30%ZnO, 2% ~ 5%Al
2O
3, each constituent mass total amount percentage sum is 100%; With above-mentioned raw materials mix, hot melt, cooling, pulverizing, ball milling, drying, sieving makes lead-free glass powder, its average particle size range is 0.5um ~ 1.5um;
Step 2): the preparation of carrier
By mass percentage, ethyl cellulose resin with 10% ~ 30% joins in one or more mixed solutions in 70% ~ 90% butyl carbitol, butyl carbitol amyl acetate, the terpinol, in 75 ℃ ~ 95 ℃ of Water Tanks with Temp.-controlled, temperature dissolving fully, filter organic carrier;
Step 3): the preparation of slurry
By mass percentage, lead-free glass powder 1% ~ 4%, ball-type aluminium powder 70% ~ 85%, step 2 that step 1) is made) carrier 10% ~ 22%, solvent 3% ~ 6%, plasticizer 0.1% ~ 2%, the dispersant 0.1 ~ 1% that make mix, be dispersed on the three-roller below the 15um, obtaining back aluminum slurry after the filtration.
In the present invention, the adding proportion of change glass dust and ball-type aluminium powder can be improved the angularity of contact resistance and battery sheet; Viscosity, printing that the adding proportion of change organic carrier and solvent can be regulated product; The plasticity that the adding proportion of change plasticizer can be regulated product, levelability and printing; The network blocking and the dried net phenomenon that may occur when improving printing by proper auxiliary agent, organic carrier and solvent; Adopt the solar cell transformation efficiency of this pulp preparation to significantly improve.
Embodiment
A kind of back aluminum slurry for environment-friendly silicon-based solar battery comprises following component composition (mass percentage content): lead-free glass powder 1-4%, ball-type aluminium powder 70 ~ 85%, organic carrier 10% ~ 22%, solvent 3% ~ 6%, plasticizer 0.1% ~ 2% and dispersant 0.1 ~ 1%,
Described lead-free glass powder is formed (mass percentage content): 40% ~ 70%Bi by following component
2O
3, 1% ~ 4%BaO, 10% ~ 20%SiO
2, 15% ~ 30%ZnO, 2% ~ 5%Al
2O
3,
Described organic carrier is formed (mass percentage content) by following component: one or more mixed solutions in 10% ~ 30% ethyl cellulose resin and 70% ~ 90% butyl carbitol, butyl carbitol amyl acetate, the terpinol,
Described solvent is one or more mixed solutions in butyl carbitol, butyl carbitol amyl acetate, the terpinol.
Described ball-type aluminium powder average grain diameter is that 2um ~ 6um, purity are greater than 99.50%.
Described plasticizer is one or more of o-phthalic acid dibutyl ester, dibutyl phthalate (DBP), dioctyl adipate;
Described dispersant is one or more of Tissuemat E, zinc stearate, microcrystalline wax.
A kind of preparation method of back aluminum slurry for environment-friendly silicon-based solar battery comprises following basic step:
Step 1): the preparation of lead-free glass powder
Material component and mass percent are: 40% ~ 70%Bi
2O
3, 1% ~ 4%BaO, 10% ~ 20%SiO
2, 15% ~ 30%ZnO, 2% ~ 5%Al
2O
3, each constituent mass total amount percentage sum is 100%; With above-mentioned raw materials mix, hot melt, cooling, pulverizing, ball milling, drying, sieving makes lead-free glass powder, its average particle size range is 0.5um ~ 1.5um;
Step 2): the preparation of carrier
By mass percentage, ethyl cellulose resin with 10% ~ 30% joins in one or more mixed solutions in 70% ~ 90% butyl carbitol, butyl carbitol amyl acetate, the terpinol, in 75 ℃ ~ 95 ℃ of Water Tanks with Temp.-controlled, temperature dissolving fully, filter organic carrier;
Step 3): the preparation of slurry
By mass percentage, lead-free glass powder 1% ~ 4%, ball-type aluminium powder 70% ~ 85%, step 2 that step 1) is made) carrier 10% ~ 22%, solvent 3% ~ 6%, plasticizer 0.1% ~ 2%, the dispersant 0.1 ~ 1% that make mix, be dispersed on the three-roller below the 15um, obtaining back aluminum slurry after the filtration.
Further specify preparation process of the present invention below in conjunction with concrete embodiment:
Embodiment 1
1) preparation of environment-friendly type glass dust: with Bi
2O
340%, BaO1%, SiO
220%, ZnO15%, Al
2O
32% mix by mass percentage after, at 1200 ℃ down after the insulation fusing in 30 minutes, with the glass dust cold cut, ball milling 48 hours, it is standby to filter the back through 400 eye mesh screens;
2) preparation of organic carrier: by mass percentage 10% ethyl cellulose resin is joined in 90% the terpinol, be heated to 75 ℃ ~ 95 ℃ to dissolving fully in water bath with thermostatic control, 250 orders filter;
3) preparation of slurry: by mass percentage with above-mentioned 4% glass dust, 70% ball-type aluminium powder, 22% organic carrier, 3% terpinol solvent, 0.6% o-phthalic acid dibutyl ester, 0.4% Tissuemat E dispersant, they are mixed in planetary or other mixer, be dispersed on the three-roller below the 15um again, filter in 250 eye mesh screens at last, viscosity is the environmental protection aluminium paste of 60kcps;
4) slurry is used silk screen printing in the bar shaped silicon chip surface, surveying its resistivity is 32m Ω/; In 125*125 monocrystalline silicon piece (200 ± 20um) printings, its electrical performance data of test behind drying, the sintering: open circuit voltage 626mv, transformation efficiency 17.4%.
Embodiment 2
1) preparation of environment-friendly type glass dust: with Bi
2O
370%, BaO2%, SiO
210%, ZnO15%, Al
2O
33% mix by mass percentage after, at 1100 ℃ down after the insulation fusing in 30 minutes, with the glass dust cold cut, ball milling 48 hours, it is standby to filter the back through 400 eye mesh screens;
2) preparation of organic carrier: by mass percentage 10% ethyl cellulose resin is joined in 90% the terpinol, be heated to 75 ℃ ~ 95 ℃ to dissolving fully in water bath with thermostatic control, 325 orders filter;
3) preparation of slurry: by mass percentage with above-mentioned 1% glass dust, 85% ball-type aluminium powder, 10% organic carrier, 3% terpinol solvent, 0.2% o-phthalic acid dibutyl ester, 0.8% Tissuemat E dispersant, they are mixed in planetary or other mixer, be dispersed on the three-roller below the 15um again, filter in 325 eye mesh screens at last, viscosity is the environmental protection aluminium paste of 65kcps;
4) slurry is used silk screen printing in the bar shaped silicon chip surface, surveying its resistivity is 30m Ω/; In 125*125 monocrystalline silicon piece (200 ± 20um) printings, its electrical performance data of test behind drying, the sintering: open circuit voltage 628mv, transformation efficiency 17.6%.
Embodiment 3
1) preparation of environment-friendly type glass dust: with Bi
2O
350%, BaO4%, SiO
212%, ZnO30%, Al
2O
34% mix by mass percentage after, at 1150 ℃ down after the insulation fusing in 30 minutes, with the glass dust cold cut, ball milling 48 hours, it is standby to filter the back through 325 eye mesh screens;
2) preparation of organic carrier: by mass percentage 10% ethyl cellulose resin is joined in 90% the terpinol, be heated to 75 ℃ ~ 95 ℃ to dissolving fully in water bath with thermostatic control, 325 orders filter;
3) preparation of slurry: by mass percentage with above-mentioned 3% glass dust, 75% ball-type aluminium powder, 16% organic carrier, 3.5% terpinol solvent, 2% o-phthalic acid dibutyl ester, 0.5% Tissuemat E dispersant, they are mixed in planetary or other mixer, be dispersed on the three-roller below the 15um again, filter in 250 eye mesh screens at last, viscosity is the environmental protection aluminium paste of 67kcps;
4) slurry is used silk screen printing in the bar shaped silicon chip surface, surveying its resistivity is 35m Ω/; In 125*125 monocrystalline silicon piece (200 ± 20um) printings, its electrical performance data of test behind drying, the sintering: open circuit voltage 624mv, transformation efficiency 17.2%.
Embodiment 4
1) preparation of environment-friendly type glass dust: with Bi
2O
360%, BaO3%, SiO
215%, ZnO17%, Al
2O
35% mix by mass percentage after, at 1120 ℃ down after the insulation fusing in 30 minutes, with the glass dust cold cut, ball milling 48 hours, it is standby to filter the back through 325 eye mesh screens;
2) preparation of organic carrier: by mass percentage 10% ethyl cellulose resin is joined in 90% the terpinol, be heated to 75 ℃ ~ 95 ℃ to dissolving fully in water bath with thermostatic control, 325 orders filter;
3) preparation of slurry: by mass percentage with above-mentioned 2% glass dust, 80% ball-type aluminium powder, 12% organic carrier, 3% terpinol solvent, 2% o-phthalic acid dibutyl ester, 1% Tissuemat E dispersant, they are mixed in planetary or other mixer, be dispersed on the three-roller below the 15um again, filter in 325 eye mesh screens at last, viscosity is the environmental protection aluminium paste of 58kcps;
4) slurry is used silk screen printing in the bar shaped silicon chip surface, surveying its resistivity is 32m Ω/; In 125*125 monocrystalline silicon piece (200 ± 20um) printings, its electrical performance data of test behind drying, the sintering: open circuit voltage 626mv, transformation efficiency 17.4%.
Embodiment 5
1) preparation of environment-friendly type glass dust: with Bi
2O
355%, BaO3%, SiO
217%, ZnO20%, Al
2O
35% mix by mass percentage after, at 1170 ℃ down after the insulation fusing in 30 minutes, with the glass dust cold cut, ball milling 48 hours, it is standby to filter the back through 325 eye mesh screens;
2) preparation of organic carrier: by mass percentage 10% ethyl cellulose resin is joined in 90% the terpinol, be heated to 75 ℃ ~ 95 ℃ to dissolving fully in water bath with thermostatic control, 325 orders filter;
3) preparation of slurry: by mass percentage with above-mentioned 2% glass dust, 72% ball-type aluminium powder, 18% organic carrier, 6% terpinol solvent, 1.9% o-phthalic acid dibutyl ester, 0.1% Tissuemat E dispersant, they are mixed in planetary or other mixer, be dispersed on the three-roller below the 15um again, filter in 250 eye mesh screens at last, viscosity is the environmental protection aluminium paste of 63kcps;
4) slurry is used silk screen printing in the bar shaped silicon chip surface, surveying its resistivity is 30m Ω/; In 125*125 monocrystalline silicon piece (200 ± 20um) printings, its electrical performance data of test behind drying, the sintering: open circuit voltage 628mv, transformation efficiency 17.5%.
Claims (5)
1. back aluminum slurry for environment-friendly silicon-based solar battery, it is characterized in that comprising following component composition (mass percentage content): lead-free glass powder 1 ~ 4%, ball-type aluminium powder 70 ~ 85%, organic carrier 10% ~ 22%, solvent 3% ~ 6%, plasticizer 0.1% ~ 2% and dispersant 0.1 ~ 1%
Described lead-free glass powder is formed (mass percentage content): 40% ~ 70%Bi by following component
2O
3, 1% ~ 4%BaO, 10% ~ 20%SiO
2, 15% ~ 30%ZnO, 2% ~ 5%Al
2O
3,
Described organic carrier is formed (mass percentage content) by following component: one or more mixed solutions in 10% ~ 30% ethyl cellulose resin and 70% ~ 90% butyl carbitol, butyl carbitol amyl acetate, the terpinol,
Described solvent is one or more mixed solutions in butyl carbitol, butyl carbitol amyl acetate, the terpinol.
2. back aluminum slurry for environment-friendly silicon-based solar battery according to claim 1 is characterized in that: described ball-type aluminium powder average grain diameter is that 2um ~ 6um, purity are greater than 99.50%.
3. back aluminum slurry for environment-friendly silicon-based solar battery according to claim 1 is characterized in that: described plasticizer is one or more of o-phthalic acid dibutyl ester, dibutyl phthalate (DBP), dioctyl adipate.
4. back aluminum slurry for environment-friendly silicon-based solar battery according to claim 1 is characterized in that: described dispersant is one or more of Tissuemat E, zinc stearate, microcrystalline wax.
5. the preparation method of the arbitrary described back aluminum slurry for environment-friendly silicon-based solar battery of claim 1-4 is characterized in that, comprises following basic step:
Step 1): the preparation of lead-free glass powder
Material component and mass percent are: 40% ~ 70%Bi
2O
3, 1% ~ 4%BaO, 10% ~ 20%SiO
2, 15% ~ 30%ZnO, 2% ~ 5%Al
2O
3, each constituent mass total amount percentage sum is 100%; With above-mentioned raw materials mix, hot melt, cooling, pulverizing, ball milling, drying, sieving makes lead-free glass powder, its average particle size range is 0.5um ~ 1.5um;
Step 2): the preparation of carrier
By mass percentage, ethyl cellulose resin with 10% ~ 30% joins in one or more mixed solutions in 70% ~ 90% butyl carbitol, butyl carbitol amyl acetate, the terpinol, in 75 ℃ ~ 95 ℃ of Water Tanks with Temp.-controlled, temperature dissolving fully, filter organic carrier;
Step 3): the preparation of slurry
By mass percentage, lead-free glass powder 1% ~ 4%, ball-type aluminium powder 70% ~ 85%, step 2 that step 1) is made) carrier 10% ~ 22%, solvent 3% ~ 6%, plasticizer 0.1% ~ 2%, the dispersant 0.1 ~ 1% that make mix, be dispersed on the three-roller below the 15um, obtaining back aluminum slurry after the filtration.
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| CN102219384A (en) * | 2011-03-28 | 2011-10-19 | 彩虹集团公司 | Inorganic adhesive for silicon-based solar battery back aluminum slurry and preparation method thereof |
| 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 |
| CN102544209A (en) * | 2011-12-29 | 2012-07-04 | 彩虹集团公司 | Groove notching method of crystal silicon solar cell |
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| CN102219384A (en) * | 2011-03-28 | 2011-10-19 | 彩虹集团公司 | Inorganic adhesive for silicon-based solar battery back aluminum slurry and preparation method thereof |
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| CN103177792A (en) * | 2011-12-23 | 2013-06-26 | 浙江昱辉阳光能源有限公司 | Lead-free aluminum paste for solar cell and preparation method thereof |
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| CN102544209A (en) * | 2011-12-29 | 2012-07-04 | 彩虹集团公司 | Groove notching method of crystal silicon solar cell |
| CN102760511A (en) * | 2012-05-28 | 2012-10-31 | 杭州正银电子材料有限公司 | Crystalline silicon solar cell BSF (back surface field) lead-free aluminum electroconductive slurry and preparation method thereof |
| CN102760511B (en) * | 2012-05-28 | 2014-06-04 | 杭州正银电子材料有限公司 | Crystalline silicon solar cell BSF (back surface field) lead-free aluminum electroconductive slurry and preparation method thereof |
| CN103514973B (en) * | 2012-06-25 | 2016-05-11 | 比亚迪股份有限公司 | Conductive paste for solar cell and preparation method thereof |
| CN103514973A (en) * | 2012-06-25 | 2014-01-15 | 比亚迪股份有限公司 | Conductive slurry used for solar cell and method of preparing the same |
| CN103000256A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Undoped solar cell back aluminum slurry |
| CN104751939A (en) * | 2013-12-31 | 2015-07-01 | 比亚迪股份有限公司 | Aluminum conductive slurry applicable to crystalline silicon solar cells |
| CN104751939B (en) * | 2013-12-31 | 2017-05-31 | 比亚迪股份有限公司 | A kind of crystal silicon solar energy battery aluminum conductive electric slurry |
| CN106251930A (en) * | 2016-08-11 | 2016-12-21 | 通威太阳能（合肥）有限公司 | Anti-tearing aluminum paste for back electric field of battery piece |
| CN106251930B (en) * | 2016-08-11 | 2017-10-27 | 通威太阳能（合肥）有限公司 | Anti-tearing aluminum paste for back electric field of battery piece |
| CN109932401A (en) * | 2019-03-11 | 2019-06-25 | 广东工业大学 | A kind of doping SnO2Slurry and its preparation method and application |
| CN110217992A (en) * | 2019-05-24 | 2019-09-10 | 江苏大学 | A kind of preparation method of environment-friendly glass frit |
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