CN101942281B - Organic binding agent for back aluminum paste of silicon-based solar battery and preparation method thereof - Google Patents
Organic binding agent for back aluminum paste of silicon-based solar battery and preparation method thereof Download PDFInfo
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- CN101942281B CN101942281B CN2010102968466A CN201010296846A CN101942281B CN 101942281 B CN101942281 B CN 101942281B CN 2010102968466 A CN2010102968466 A CN 2010102968466A CN 201010296846 A CN201010296846 A CN 201010296846A CN 101942281 B CN101942281 B CN 101942281B
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- back aluminum
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- solar cell
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Abstract
The invention discloses an organic binding agent for a back aluminum paste of a silicon-based solar battery and a preparation method thereof. The organic binding agent comprises the following components in percentage by weight: 5-10% of ethyl cellulose, 2-5% of phenolic modified rosin resin, 75-90% of organic solvent, 0.5-2% of dispersant, 1.0-4% of defoamer and 0.5-5% of anti-settling agent. The organic binding agent enables the back aluminum paste to have fine dispersibility, excellent printing performance and fine storage performance, so that the back aluminum paste has good leveling property, has no bubbles on the surface and can not be delaminated after being stored for a long time, and solid powder is well attached to the silicon chip after the back aluminum paste is dried.
Description
Technical field
The invention belongs to the silica-based solar cell technical field, relate to the silica-based solar cell back aluminum slurry with organic binder bond and preparation method thereof.
Background technology
Tradition fossil energy worsening shortages; The terrestrial climate variation issue long-term existence that causes because of excess discharging carbonic acid gas isothermal chamber gas and growing in intensity; The more and more national people and government have realized that; The transformation of energy structure is imperative, and being widely used of clean reproducible energies such as solar energy power generating become the tendency of the day.The technology of tool meaning became the competitively focus of Application Research of countries in the world during solar photovoltaic technology utilized as sun power, wherein especially with the tool representative of crystal silicon solar energy battery.
Prepare in the process at crystal silicon solar cell sheet, back aluminum slurry is printed on the silicon chip back side, behind super-dry, sintering, forms aluminium back of the body field plate at the back side of silicon chip of solar cell, the effect that play surface passivation, improves the cell photoelectric efficiency of conversion.
Above-mentioned back aluminum slurry mainly is made up of aluminium powder, glass powder, organic binder bond and additive.Wherein organic binder bond mainly contains the effect of following aspect as a kind of carrier:
1, the material that makes the solid powdery in the slurry system be prone to reunite has uniform dispersiveness, keeps a kind of suspended state;
2, make electrode slurry have good mobility, film forming in the process of printing, and make film forming even, thickness is consistent;
3, after the drying, make pressed powder be attached to silicon substrate surface and do not come off, get into sintering circuit smoothly;
4, in use, do not produce dried net, the phenomenon of slipping through the net.
Above-mentioned organic binder bond is made up of high molecular polymer, organic solvent and other auxiliary agent.Traditional organic binder bond is just paid attention to the planarization on printing disposed slurry surface; And bubble that the surface produces when having ignored the dispersiveness of slurry on three-roller, slurry printing and sedimentation causes in storage process demixing phenomenon; Dry back pressed powder produces not dried net, the phenomenon of slipping through the net attached on the silicon chip and in use.
Summary of the invention
The problem that the present invention solves is to provide a kind of silica-based solar cell back aluminum slurry to make slurry possess good dispersiveness with this organic binder bond of organic binder bond, and dry back pressed powder and silicon chip have well and adhere to.
The present invention realizes through following technical scheme:
A kind of silica-based solar cell back aluminum slurry is used organic binder bond, and component that is comprised and massfraction thereof are:
TKK 021: 5～10%; Phenol aldehyde modified Gum Rosin: 2～5%; Organic solvent: 75～90%; Dispersion agent: 0.5～2%; Skimmer: 1.0～4%; Anti-settling agent: 0.5～5%.
Described organic solvent is one or more in diethylene glycol monobutyl ether, 1-Methoxy-2-propyl acetate, ethylene glycol ethyl ether, ethylene glycol monomethyl ether acetate, sherwood oil, turps, the Terpineol 350.
Described dispersion agent is one or more of BYK-110, BYK-111; Skimmer is BYK-066; Anti-settling agent is MT 6900-20X.
A kind of silica-based solar cell back aluminum slurry may further comprise the steps with the preparation method of organic binder bond:
In massfraction; TKK 021 with 5～10%, 2～5% phenol aldehyde modified Gum Rosin, 75～90% organic solvent, 0.5～2% dispersion agent, 1.0～4% skimmer, 0.5～5% anti-settling agent; Add up to 100%, join in the reaction kettle; Be heated to 80～120 ℃ then, stirring is dissolved solids fully and is obtained transparent solution, continue insulation 1～3h; Again transparent solution is filtered, obtain the silica-based solar cell back aluminum slurry and use organic binder bond.
Described organic solvent is one or more in diethylene glycol monobutyl ether, 1-Methoxy-2-propyl acetate, ethylene glycol ethyl ether, ethylene glycol monomethyl ether acetate, sherwood oil, turps, the Terpineol 350.
Described dispersion agent is one or more of BYK-110, BYK-111; Skimmer is BYK-066; Anti-settling agent is MT 6900-20X.
Described reaction kettle places oil bath.
Described stirring velocity is 100～150 rev/mins.
Compared with prior art, the present invention has following beneficial technical effects:
The proportioning of the present invention through changing organic resin to be to improve solid suspended state in the middle of the back aluminum slurry, makes that pressed powder and silicon chip have well after the back aluminum slurry drying to adhere to; Further through to the design of the kind of organic solvent, content with the dried net that improves use, the phenomenon of slipping through the net; Through to the design of the kind of auxiliary agent, content to improve the leveling characteristics of printing, printing back surface compact.
Organic binder bond provided by the invention makes back aluminum slurry possess good dispersiveness; Superior printing, good leveling property during printing, the no bubble in surface; Good storage property, the postpone slurry is not stratified for a long time; Dry back pressed powder and silicon chip have well and adhere to.
Embodiment
Come the silica-based solar cell back aluminum slurry to carry out detailed explanation with organic binder bond and preparation method thereof below in conjunction with concrete embodiment and concrete effect comparison, said is to explanation of the present invention rather than qualification.
A kind of silica-based solar cell back aluminum slurry is used organic binder bond, and component that is comprised and massfraction thereof are:
TKK 021: 5～10%; Phenol aldehyde modified Gum Rosin: 2～5%; Organic solvent: 75～90%; Dispersion agent: 0.5～2%; Skimmer: 1.0～4%; Anti-settling agent: 0.5～5%.
Described organic solvent includes but not limited to one or more in diethylene glycol monobutyl ether, 1-Methoxy-2-propyl acetate, ethylene glycol ethyl ether, ethylene glycol monomethyl ether acetate, sherwood oil, turps, the Terpineol 350.
Described dispersion agent includes but not limited to one or more of BYK-111, BYK-110 of Bi Ke chemical company; Skimmer includes but not limited to the BYK-066 of Bi Ke chemical company; Anti-settling agent includes but not limited to the MT 6900-20X of U.S. special Xiang Science and Technology Ltd..
Said silica-based solar cell back aluminum slurry may further comprise the steps with the preparation method of organic binder bond:
At first weigh according to the raw material composition and the mass percent thereof of organic binder bond; Component with weighing adds in the oil bath reaction kettle then, is warming up to 80～120 ℃, 100～150 rev/mins of stirring velocitys; Dissolve the back fully to the organic resin powder and form light yellow transparent solution, be incubated 2 hours again; With the light yellow transparent solution of gained while hot, through 250～325 order silk screen filter, promptly make silica-based solar cell and use organic binder bond with back aluminum slurry.
Provide several kinds of concrete proportionings of organic binder bond below, and Heating temperature and stirring velocity in the middle of the preparation process, specifically as shown in table 1:
Table 1 silica-based solar cell back aluminum slurry is with concrete proportioning of organic binder bond and preparation parameter
Do test for performance, above-mentioned organic binder bond made silica-based solar cell by following way use back aluminum slurry, test its correlated performance this organic binder bond:
Take by weighing organic binder bond 24% in the table 1, aluminium powder 75%, glass powder 1% by mass percentage respectively, above-mentioned three kinds of raw materials were stirred 30 minutes with planetary stirrer, disperseed 2 hours, get silica-based solar cell and use back aluminum slurry with three-roller.
The gained back aluminum slurry is tested as follows:
1, side resistance test: will prepared back aluminum slurry with 250 order band 100mm * 10mm figure silk screen printing on silicon chip, 200 ℃ dry 5 minutes down, 600 ℃ of following sintering of chain-conveyer furnace 10 minutes, test that square resistance is promptly square behind its sintering hinders;
2, adhere to test: with above-mentioned slurry with 250 order band 50mm * 50mm square-shaped patterns silk screen printing on silicon chip, 200 ℃ dry 5 minutes down, square pattern is divided into 100 lattice, detect the dry linting situation;
3, sedimentation test: the slurry placement of processing after 30 days, is got upper surface slurry test solid content, and range of solid content needs) more than or equal to 73%;
4, do the net test: slurry is tiled in the printing net no dried net after 2 hours;
5, the test of slipping through the net: slurry is placed on 250 orders has the graphics field, and the figure back side does not form drop after 30 minutes.
Concrete test result is as shown in table 2, can find out that the organic binder bond that is provided has significant effect for the silica-based solar cell back aluminum slurry.
The test result of the back aluminum slurry of the different organic binder bond preparations of table 2
Explain: in the tack test, have only 1 lattice dry linting in 1/100 expression, 100 lattice
Claims (6)
1. a silica-based solar cell back aluminum slurry is used organic binder bond, it is characterized in that component that is comprised and massfraction thereof are:
TKK 021: 5～10%; Phenol aldehyde modified Gum Rosin: 2～5%; Organic solvent: 75～90%; Dispersion agent: 0.5～2%; Skimmer: 1.0～4%; Anti-settling agent: 0.5～5%.
2. silica-based solar cell back aluminum slurry as claimed in claim 1 is used organic binder bond; It is characterized in that described organic solvent is one or more in diethylene glycol monobutyl ether, 1-Methoxy-2-propyl acetate, ethylene glycol ethyl ether, ethylene glycol monomethyl ether acetate, sherwood oil, turps, the Terpineol 350.
3. a silica-based solar cell back aluminum slurry is with the preparation method of organic binder bond,, it is characterized in that, may further comprise the steps:
In massfraction; TKK 021 with 5～10%, 2～5% phenol aldehyde modified Gum Rosin, 75～90% organic solvent, 0.5～2% dispersion agent, 1.0～4% skimmer, 0.5～5% anti-settling agent; Add up to 100%, join in the reaction kettle; Be heated to 80～120 ℃ then, stirring is dissolved solids fully and is obtained transparent solution, continue insulation 1～3h; Again transparent solution is filtered, obtain the silica-based solar cell back aluminum slurry and use organic binder bond.
4. silica-based solar cell back aluminum slurry as claimed in claim 3 is with the preparation method of organic binder bond; It is characterized in that described organic solvent is one or more in diethylene glycol monobutyl ether, 1-Methoxy-2-propyl acetate, ethylene glycol ethyl ether, ethylene glycol monomethyl ether acetate, sherwood oil, turps, the Terpineol 350.
5. silica-based solar cell back aluminum slurry as claimed in claim 3 is with the preparation method of organic binder bond, and described reaction kettle places oil bath.
6. silica-based solar cell back aluminum slurry as claimed in claim 3 is with the preparation method of organic binder bond, and described stirring velocity is 100～150 rev/mins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102968466A CN101942281B (en) | 2010-09-29 | 2010-09-29 | Organic binding agent for back aluminum paste of silicon-based solar battery and preparation method thereof |
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| CN2010102968466A CN101942281B (en) | 2010-09-29 | 2010-09-29 | Organic binding agent for back aluminum paste of silicon-based solar battery and preparation method thereof |
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| CN101942281A CN101942281A (en) | 2011-01-12 |
| CN101942281B true CN101942281B (en) | 2012-07-04 |
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| CN102244112B (en) * | 2011-07-19 | 2013-11-06 | 彩虹集团公司 | Aluminium paste for silicon solar battery |
| CN102304287A (en) * | 2011-07-19 | 2012-01-04 | 彩虹集团公司 | Organic adhesive composite used for silicon solar cell silver paste and preparation method thereof |
| CN103149800A (en) * | 2011-12-06 | 2013-06-12 | 东京应化工业株式会社 | Composition used for etching mask and pattern forming method |
| CN102558965B (en) * | 2011-12-27 | 2014-03-26 | 彩虹集团公司 | Printing ink for side windshield of automobile and preparation method of printing ink |
| CN102408778A (en) * | 2011-12-28 | 2012-04-11 | 彩虹集团公司 | Ink for automobile front windshield and preparation method thereof |
| CN103555233A (en) * | 2013-10-21 | 2014-02-05 | 常州宝邦新能源材料有限公司 | High-efficiency organic binder for solar aluminum paste and preparation method of binder |
| CN105482776B (en) * | 2015-12-29 | 2017-12-05 | 河南师范大学 | A kind of antirust air nail hole closing glue and preparation method thereof |
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| CN100545958C (en) * | 2006-09-19 | 2009-09-30 | 谭富彬 | The composition of aluminum conductive electric slurry for positive temperature coefficient heat-variable resistor and preparation method |
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