CN103745763B - Rear surface of solar cell electrode slurry and preparation method thereof - Google Patents
Rear surface of solar cell electrode slurry and preparation method thereof Download PDFInfo
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- CN103745763B CN103745763B CN201410027163.9A CN201410027163A CN103745763B CN 103745763 B CN103745763 B CN 103745763B CN 201410027163 A CN201410027163 A CN 201410027163A CN 103745763 B CN103745763 B CN 103745763B
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- acid bismuth
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Abstract
The invention discloses a kind of rear surface of solar cell electrode slurry and preparation method thereof, containing thylhexoic acid bismuth in raw material, by adhesive, containing aluminium powder and thylhexoic acid bismuth mixing also fully dispersion, add again diluent adjustment viscosity and rheological characteristic obtain rear surface of solar cell electrode slurry of the present invention, liquid thylhexoic acid bismuth in slurry can be sintered into vitreum, not only reduce the solid content of slurry, be conducive to the use amount reduced containing aluminium powder and slurry, and thylhexoic acid bismuth can increase the adhesive force between slurry and silicon chip, improve weld force, and then promote cell photoelectric conversion efficiency, and, adopt silver powder, silver-plated base metal powder and glass dust to be mixed into the fine silver powder replacing prior art containing aluminium powder, greatly reduce cost of sizing agent, and then reduce cell piece cost.
Description
Technical field
The invention belongs to solar cell size field, be specifically related to a kind of rear surface of solar cell electrode slurry and preparation method thereof.
Background technology
Along with the high speed development of information industry, electric slurry plays important role as its critical material.Therefore the raw material of high-performance, low cost will improve the competitiveness of electronic product greatly, also must become the necessary condition of electric slurry self industry development.The main component of current front and back silver slurry is argent, belongs to noble metal series, and therefore one of raw material the most expensive except silicon chip in solar cell process prepared by silver slurry.Raw-material cost reduces, the low cost trend domesticized for solar energy industry will have very great meaning.The silver-colored valency in the recent world goes up in madness, and therefore replacing silver with base metal also becomes one of selection reduced costs as electrode material.
Back silver slurry has very large impact to electrical performance of cell and reliability, and the base metal slurry can made higher than fine silver performance has very large difficulty.Back silver is starched the subject matter faced at present and is reduced use cost exactly, improves adhesive force.And these two features are conflicting conflicts.Reduce use cost will use and starch compared with the silver of low-solid content, and lower solid content can cause the solderability of slurry and the reduction of adhesive force.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of rear surface of solar cell electrode slurry and preparation method thereof, preparation method of the present invention is simple, solve the problem of oxidation of pure base metal slurry in cell piece sintering process, be suitable for suitability for industrialized production, add thylhexoic acid bismuth in back silver slurry and replace part solid oxidation bismuth in slurry, obtained slurry solid content decreases than the solid content containing solid oxidation bismuth, greatly reduce the use amount of slurry, reduce the production cost of slurry and battery, also improve the adding of thylhexoic acid bismuth the adhesive force of back silver slurry, and contact resistance is little, weldability adhesive force is good, battery conversion efficiency is high.
The present invention in order to the technical scheme solving its technical problem and adopt is:
A kind of rear surface of solar cell electrode slurry, comprises adhesive, containing aluminium powder and diluent, also comprises thylhexoic acid bismuth.
Saying further, described adhesive, is (15%-25%) containing the weight ratio of aluminium powder, diluent and thylhexoic acid bismuth: (40%-65%): (10%-35%): (10%-15%).
Say further, the concentration of described thylhexoic acid bismuth raw material is 90%-99%, and the bismuth-containing amount of described thylhexoic acid bismuth raw material is the 2%-30% of thylhexoic acid bismuth weight.
Say further, describedly to be mixed by silver powder, silver-plated base metal powder and glass dust and the weight ratio of three is (15%-40%) containing aluminium powder: (50%-80%): (5%-10%), described silver-plated base metal powder is at least one in silver-plated copper powder and silver-plated nickel powder, and the content of the silver in described silver-plated base metal powder is the 2%-60% of silver-plated base metal grain weight amount.
It is preferred that the particle size of described silver-plated base metal powder is 2 microns-30 microns, described silver-plated base metal powder is at least one in spherical, sheet and dendroid.
It is preferred that described adhesive be by dynamic viscosity be the ethyl cellulose of 200CP, dynamic viscosity is the ethyl cellulose of 300CP and butyl mixes and the weight ratio of three is (4%-20%): (2%-10%): (70%-90%).
It is preferred that described diluent to be mixed by butyl and terpinol and both weight ratios are (50%-70%): (30%-50%).
It is preferred that the fineness of described slurry is less than 8 microns.
The preparation method of above-mentioned rear surface of solar cell electrode slurry comprises the steps:
One, adhesive is prepared;
Two, preparation is containing aluminium powder;
Three, diluent is prepared;
Four, by adhesive, containing aluminium powder and the mixing of thylhexoic acid bismuth and fully dispersion, then add diluent adjustment viscosity and rheological characteristic.
Saying further, is comprise the steps:
One, adhesive is prepared: be the ethyl cellulose of 200CP by dynamic viscosity, dynamic viscosity is the ethyl cellulose of 300CP and butyl mixing and the weight ratio of three is (4%-20%): (2%-10%): (70%-90%), obtained organic binder resin;
Two, preparation is containing aluminium powder: by the mixing of silver powder, silver-plated base metal powder and glass dust and the weight ratio of three is (15%-40%): (50%-80%): (5%-10%), obtained containing aluminium powder, wherein, described silver-plated base metal powder is at least one in silver-plated copper powder and silver-plated nickel powder, and the content of the silver in described silver-plated base metal powder is the 2%-60% of silver-plated base metal grain weight amount;
Three, diluent is prepared: by butyl and terpinol mixing and both weight ratio is (50%-70%): (30%-50%), obtained diluent;
Four, in raw material total weight percent, described adhesive, containing aluminium powder, the weight ratio of diluent and thylhexoic acid bismuth is (15%-25%): (40%-65%): (10%-35%): (10%-15%), wherein, the concentration of described thylhexoic acid bismuth raw material is 90%-99%, the bismuth-containing amount of described thylhexoic acid bismuth raw material is the 2%-30% of thylhexoic acid bismuth weight, mix described adhesive, containing aluminium powder and thylhexoic acid bismuth, disperse through dispersion machine, again through three-high mill adjustment fineness, then diluent adjustment viscosity and rheological characteristic is added, obtained rear surface of solar cell electrode slurry.
The invention has the beneficial effects as follows: rear surface of solar cell electrode slurry of the present invention mainly adds thylhexoic acid bismuth in slurry feedstock, slurry is in use sintering process, thylhexoic acid bismuth liquid inside slurry can be sintered into vitreum, not only reduce the solid content of slurry, be conducive to the use amount reduced containing aluminium powder and slurry, and thylhexoic acid bismuth can increase the adhesive force between slurry and silicon chip, improve weld force, and then promote cell photoelectric conversion efficiency; And, adopt silver powder, silver-plated base metal powder and glass dust to be mixed into the fine silver powder replacing prior art containing aluminium powder, greatly reduce cost of sizing agent, and then reduce cell piece cost.
Embodiment
Embodiment: the composition of raw materials of the rear surface of solar cell electrode slurry of the embodiment of the present invention 1 to 8 is as follows:
Embodiment 1: thylhexoic acid bismuth: 15wt%, containing aluminium powder 50wt%(silver powder 7.5wt%, silver-plated base metal powder 37.5wt% and 5wt% glass dust), ethyl cellulose 1wt% and butyl 8.6wt% that the ethyl cellulose 0.4wt% that adhesive 10wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 25wt%(butyl 12.5wt% and terpinol 12.5wt%).
Embodiment 2: thylhexoic acid bismuth: 10wt%, containing aluminium powder 65wt%(silver powder 26wt%, silver-plated base metal powder 32.5wt% and 6.5wt% glass dust), ethyl cellulose 0.3wt% and butyl 11.7wt% that the ethyl cellulose 3wt% that adhesive 15wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 10wt%(butyl 7wt% and terpinol 3wt%).
Embodiment 3: thylhexoic acid bismuth: 13wt%, containing aluminium powder 40wt%(silver powder 6wt%, silver-plated base metal powder 32wt% and 2wt% glass dust), ethyl cellulose 2.5wt% and butyl 17.5wt% that the ethyl cellulose 5wt% that adhesive 25wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 22wt%(butyl 13.2wt% and terpinol 8.8wt%).
Embodiment 4: thylhexoic acid bismuth: 11wt%, containing aluminium powder 60wt%(silver powder 13.2wt%, silver-plated base metal powder 42wt% and 4.8wt% glass dust), ethyl cellulose 0.72wt% and butyl 16.2wt% that the ethyl cellulose 1.08wt% that adhesive 18wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 11wt%(butyl 6.05wt% and terpinol 4.95wt%).
Embodiment 5: thylhexoic acid bismuth: 12wt%, containing aluminium powder 55wt%(silver powder 16.5wt%, silver-plated base metal powder 34.65wt% and 3.85wt% glass dust), ethyl cellulose 1.2wt% and butyl 16.4wt% that the ethyl cellulose 2.4wt% that adhesive 20wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 13wt%(butyl 8.45wt% and terpinol 4.55wt%).
Embodiment 6: thylhexoic acid bismuth: 14wt%, containing aluminium powder 45wt%(silver powder 15.3wt%, silver-plated base metal powder 25.65wt% and 4.05wt% glass dust), ethyl cellulose 1.84wt% and butyl 17.02wt% that the ethyl cellulose 4.14wt% that adhesive 23wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 18wt%(butyl 12.24wt% and terpinol 5.76wt%).
Embodiment 7: thylhexoic acid bismuth: 12wt%, containing aluminium powder 41wt%(silver powder 10.25wt%, silver-plated base metal powder 28.29wt% and 2.46wt% glass dust), ethyl cellulose 0.36wt% and butyl 10.56wt% that the ethyl cellulose 1.08wt% that adhesive 12wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 35wt%(butyl 18.2wt% and terpinol 16.8wt%).
Embodiment 8: thylhexoic acid bismuth: 11wt%, containing aluminium powder 48wt%(silver powder 18.24wt%, silver-plated base metal powder 25.92wt% and 3.84wt% glass dust), ethyl cellulose 0.77wt% and butyl 8.47wt% that the ethyl cellulose 1.76wt% that adhesive 11wt%(dynamic viscosity is 200CP, dynamic viscosity are 300CP), diluent 30wt%(butyl 18.6wt% and terpinol 11.4wt%).
In above-mentioned 1 to 8 embodiment, described thylhexoic acid bismuth raw material is for liquid state and concentration is 90%-99%, and the bismuth-containing amount of described thylhexoic acid bismuth raw material is the 2%-30% of thylhexoic acid bismuth weight; Described silver-plated base metal powder is at least one in silver-plated copper powder and silver-plated nickel powder, and the content of the silver in described silver-plated base metal powder is the 2%-60% of silver-plated base metal grain weight amount.
According to above-mentioned formula, the preparation method of rear surface of solar cell electrode slurry of the present invention is as follows:
One, adhesive is prepared: be the ethyl cellulose of 200CP by dynamic viscosity, dynamic viscosity is the ethyl cellulose of 300CP and butyl mixing, obtained organic binder resin;
Two, preparation is containing aluminium powder: silver powder, silver-plated base metal powder and glass dust are mixed, stir evenly rear stirring 1 hour, obtained containing aluminium powder;
Three, diluent is prepared: by butyl and terpinol mixing, obtained diluent;
Four, mix above-mentioned adhesive, containing aluminium powder and thylhexoic acid bismuth, through dispersion machine dispersion, then through three-high mill adjustment fineness to being less than 8 microns, then adding diluent and stirring 1 hour, adjustment viscosity and rheological characteristic, obtained rear surface of solar cell electrode slurry.
Should be understood that above-described embodiment is only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within claims of the present invention limited range equally after the content of having read the present invention's instruction.
Claims (2)
1. a rear surface of solar cell electrode slurry, comprises adhesive, containing aluminium powder and diluent, it is characterized in that: also comprise thylhexoic acid bismuth;
Described adhesive, be (15%-25%) containing the weight ratio of aluminium powder, diluent and thylhexoic acid bismuth: (40%-65%): (10%-35%): (10%-15%);
The concentration of described thylhexoic acid bismuth raw material is 90%-99%, and the bismuth-containing amount of described thylhexoic acid bismuth raw material is the 2%-30% of thylhexoic acid bismuth weight;
Describedly to be mixed by silver powder, silver-plated base metal powder and glass dust and the weight ratio of three is (15%-40%) containing aluminium powder: (50%-80%): (5%-10%), described silver-plated base metal powder is at least one in silver-plated copper powder and silver-plated nickel powder, and the content of the silver in described silver-plated base metal powder is the 2%-60% of silver-plated base metal grain weight amount;
The particle size of described silver-plated base metal powder is 2 microns-30 microns, and described silver-plated base metal powder is at least one in spherical, sheet and dendroid;
Described adhesive be by dynamic viscosity be the ethyl cellulose of 200CP, dynamic viscosity is the ethyl cellulose of 300CP and butyl mixes and the weight ratio of three is (4%-20%): (2%-10%): (70%-90%);
Described diluent to be mixed by butyl and terpinol and both weight ratios are (50%-70%): (30%-50%);
The fineness of described slurry is less than 8 microns.
2. a preparation method for rear surface of solar cell electrode slurry as claimed in claim 1, is characterized in that: comprise the steps:
One, adhesive is prepared: be the ethyl cellulose of 200CP by dynamic viscosity, dynamic viscosity is the ethyl cellulose of 300CP and butyl mixing and the weight ratio of three is (4%-20%): (2%-10%): (70%-90%), obtained organic binder resin;
Two, preparation is containing aluminium powder: by the mixing of silver powder, silver-plated base metal powder and glass dust and the weight ratio of three is (15%-40%): (50%-80%): (5%-10%), obtained containing aluminium powder, wherein, described silver-plated base metal powder is at least one in silver-plated copper powder and silver-plated nickel powder, and the content of the silver in described silver-plated base metal powder is the 2%-60% of silver-plated base metal grain weight amount;
Three, diluent is prepared: by butyl and terpinol mixing and both weight ratio is (50%-70%): (30%-50%), obtained diluent;
Four, in raw material total weight percent, described adhesive, containing aluminium powder, the weight ratio of diluent and thylhexoic acid bismuth is (15%-25%): (40%-65%): (10%-35%): (10%-15%), wherein, the concentration of described thylhexoic acid bismuth raw material is 90%-99%, the bismuth-containing amount of described thylhexoic acid bismuth raw material is the 2%-30% of thylhexoic acid bismuth weight, mix described adhesive, containing aluminium powder and thylhexoic acid bismuth, disperse through dispersion machine, again through three-high mill adjustment fineness, then diluent adjustment viscosity and rheological characteristic is added, obtained rear surface of solar cell electrode slurry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410027163.9A CN103745763B (en) | 2014-01-21 | 2014-01-21 | Rear surface of solar cell electrode slurry and preparation method thereof |
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| CN201410027163.9A CN103745763B (en) | 2014-01-21 | 2014-01-21 | Rear surface of solar cell electrode slurry and preparation method thereof |
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| CN103745763B true CN103745763B (en) | 2016-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015179268A1 (en) * | 2014-05-19 | 2015-11-26 | Sun Chemical Corporation | A silver paste containing bismuth oxide and its use in solar cells |
| CN106537516A (en) * | 2014-07-21 | 2017-03-22 | 太阳化学公司 | A silver paste containing organobismuth compounds and its use in solar cells |
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| CN1068007A (en) * | 1991-06-17 | 1993-01-13 | 纳幕尔杜邦公司 | The manufacture method of fo multi-layer electronic circuit |
| CN1973341A (en) * | 2004-06-23 | 2007-05-30 | 播磨化成株式会社 | Conductive metal paste |
| CN102084502A (en) * | 2008-07-10 | 2011-06-01 | 弗兰霍菲尔运输应用研究公司 | Metal-containing composition, process for producing electric contact structures on electronic components and also electronic component |
| CN102576575A (en) * | 2009-09-04 | 2012-07-11 | 巴斯夫欧洲公司 | Composition for printing electrodes |
| CN102576576A (en) * | 2009-09-04 | 2012-07-11 | 巴斯夫欧洲公司 | Composition for printing conductive tracks and method for producing solar cells |
| CN102810344A (en) * | 2012-08-03 | 2012-12-05 | 江苏欧耐尔新型材料有限公司 | Silver-plated copper containing paste for solar cell back electrode and method for preparing silver-plated copper containing paste |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130014817A1 (en) * | 2011-07-15 | 2013-01-17 | E.I. Du Pont De Nemours And Company | Conductive paste for solar cell electrodes, method for the manufacture of solar cell electrodes |
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- 2014-01-21 CN CN201410027163.9A patent/CN103745763B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068007A (en) * | 1991-06-17 | 1993-01-13 | 纳幕尔杜邦公司 | The manufacture method of fo multi-layer electronic circuit |
| CN1973341A (en) * | 2004-06-23 | 2007-05-30 | 播磨化成株式会社 | Conductive metal paste |
| CN102084502A (en) * | 2008-07-10 | 2011-06-01 | 弗兰霍菲尔运输应用研究公司 | Metal-containing composition, process for producing electric contact structures on electronic components and also electronic component |
| CN102576575A (en) * | 2009-09-04 | 2012-07-11 | 巴斯夫欧洲公司 | Composition for printing electrodes |
| CN102576576A (en) * | 2009-09-04 | 2012-07-11 | 巴斯夫欧洲公司 | Composition for printing conductive tracks and method for producing solar cells |
| CN102810344A (en) * | 2012-08-03 | 2012-12-05 | 江苏欧耐尔新型材料有限公司 | Silver-plated copper containing paste for solar cell back electrode and method for preparing silver-plated copper containing paste |
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