CN103205020B - A kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste and preparation method thereof - Google Patents
A kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste and preparation method thereof Download PDFInfo
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- CN103205020B CN103205020B CN201310117688.7A CN201310117688A CN103205020B CN 103205020 B CN103205020 B CN 103205020B CN 201310117688 A CN201310117688 A CN 201310117688A CN 103205020 B CN103205020 B CN 103205020B
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Abstract
The invention belongs to the sub-slurry field of crystal silicon photovoltaic battery, relate to a kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste and preparation method thereof.This organic carrier is made up of intermediate, thinner, thixotropic agent and dispersion agent, and described intermediate is by polymkeric substance and solvent composition.Its preparation method is: dropped into by solvent in oil bath stainless steel cauldron, after being heated to 80 DEG C-120 DEG C, is added into polymkeric substance, is stirred to polymer dissolution, constant temperature 2-3 hour, and cool to room temperature filters warehouse-in.Organic carrier environmental protection prepared by the present invention, bake out temperature is low, and size mixing technology is convenient, by adjusting the proportioning of intermediate and thinner, just can obtain the aluminium paste of a series of different viscosity.
Description
Technical field
The invention belongs to the sub-slurry field of crystal silicon photovoltaic battery, relate to a kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste and preparation method thereof.
Background technology
Crystal silicon photovoltaic battery is a kind of semiconducter device that solar energy converting can be become electric energy, and under illumination condition, inside solar energy battery can produce photogenerated current, electric energy can be exported by electrode.In the manufacturing processed forming solar cell, crystal silicon photovoltaic cell aluminum paste at the Main Function of area of solar cell for preparing aluminium back surface field.Aluminium paste is usually screen printed in the back side of silicon chip and carries out drying, sinters after drying completes to this silicon chip, forms Al-Si melt.
Crystal photovoltaic cell aluminum paste is primarily of aluminium powder, glass powder, and organic carrier forms, and its preparation technology, for be scattered in organic carrier by aluminium powder, glass powder, forms the paste slurry of stable uniform.Organic carrier Main Function is energy storage, and the performance of organic carrier is most important to aluminium paste stability, and organic carrier prepares quality, directly affects compactness and the rear Ash residue amount of sintering of the rear rete of slurry sintering, large on the impact of battery electrical property.
Existing organic carrier preparation process: polymkeric substance is heated and stirred together with solvent, cold filtration after dissolving, easily causes resin reunite and cause dissolving difficult.The inconvenience and the mode preparing carrier is at present sized mixing, slurry viscosity is difficult to control.
Summary of the invention
For the deficiencies in the prior art, the present invention aims to provide a kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste, this organic carrier contains intermediate materials, by adjusting the ratio of intermediate materials and other material, simply can obtain organic carrier and the slurry of different viscosity.Organic carrier environmental protection prepared by the present invention, bake out temperature is low, and size mixing technology is convenient, and the solar cell properties prepared is good.
For achieving the above object, technical scheme of the present invention is:
A kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste, is made up of the component of following weight part:
10 parts-99 parts, intermediate;
Thinner 1 part-89 parts;
Thixotropic agent BYK410 0.1 part-5 parts;
Dispersant B YK180 0.1 part-5 parts;
Described intermediate is by polymkeric substance and solvent composition, and wherein the weight percent of polymkeric substance and solvent is: Ju He Wu ︰ solvent=0.1-20 ︰ 80-90; Described polymkeric substance be selected from ethyl cellulose, soluble cotton, acrylic resin, rosin modified phenolic resin one or more; Described solvent be selected from diethylene glycol methyl ether, diethylene glycol ethyl ether, butyl carbitol, phenylcarbinol, Terpineol 350, tributyl citrate, alcohol ester 12, Viscotrol C and hexadecanol one or more.
Described Organic carrier for crystalline silicon photovoltaic cell aluminum paste is preferably made up of the component of following weight part:
3 parts-12 parts, intermediate;
Thinner 3 parts-12 parts;
Thixotropic agent 0.1 part-5 parts;
Dispersion agent 0.1 part-5 parts.
The weight percent of described polymkeric substance and solvent is preferably: Ju He Wu ︰ solvent=12-20 ︰ 80-90.
Described thinner be preferably selected from diethylene glycol dimethyl ether, diethylene glycol ether, butyl carbitol, Terpineol 350, tributyl citrate, alcohol ester 12, Viscotrol C and hexadecanol one or more.
Described thixotropic agent BYK410 is the modified urea solution of German Bi Ke chemical production.Described dispersant B YK180 is the dispersion agent of German Bi Ke chemical production.The slurry dispersiveness that this thixotropic agent and thinner are prepared, stability, anti-settling performance are good, and general conventional thixotropic agent and thinner can not reach equal effect.
The preparation method of described Organic carrier for crystalline silicon photovoltaic cell aluminum paste, first by the solvent post-heating chosen to 80 DEG C-120 DEG C, then add polymkeric substance in proportion, be stirred to polymkeric substance to dissolve completely, at 80 DEG C-120 DEG C, be incubated 2-3 hour again, cooling, filters to obtain intermediate; Then in described intermediate, add thinner, thixotropic agent and dispersion agent, mix.
Compared with prior art, advantage of the present invention is:
1, organic carrier environmental protection of the present invention, not containing benzene, bromine etc., compound ROSH environmental protection command request.
2, the solvent boiling point that uses of organic carrier of the present invention is low, and carrier bake out temperature is low, energy-saving and emission-reduction.
3, BYK180 that organic carrier of the present invention uses is dispersion agent, BYK410 is thixotropic agent, makes slurry dispersiveness, stability, anti-settling performance good.Of the present invention used solvent makes Size-Film Forming Properties and good leveling property.
4, preparation method's difference of organic carrier of the present invention is first heated solvent, rear input polymkeric substance, melts speed soon, and is not easy to cause resin reunite and cause dissolving difficult.The most important thing is, the mode preparing carrier is at present sized mixing inconvenience, and with the organic carrier of this fermentation preparation, can recall the slurry of different viscosity easily, easily, solve in actual procedure and operate difficult problem.
Accompanying drawing explanation
Fig. 1 is Intermediate Preparation process flow sheet in embodiment 1;
Fig. 2 is aluminium paste preparation technology schema in embodiment 1.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
1, organic carrier preparation
(1) Intermediate Preparation
As shown in Figure 1, by diethylene glycol methyl ether, Terpineol 350, diethylene glycol ethyl ether, butyl carbitol, alcohol ester 12 all or choose several (specifically in table 1) and put in stainless steel cauldron, rotating speed 5-30 rev/min, be heated to 80 DEG C, drop into ethyl cellulose, acrylic resin again, constant temperature 120 ° reaction 2 hours, is cooled to room temperature, filtration, discharging warehouse-in after thing to be polymerized dissolves completely;
Table 1 intermediate recipe ratio (weight part)
(2) thinner preparation
By Terpineol 350, butyl carbitol, alcohol ester 12, put in stainless steel stirrer, rotating speed 10-30 rev/min mixes, and discharging is put in storage.
Table 2 diluent formulation ratio (weight part)
| Sequence number | Material name | Addible ratio | Thinner a |
| 1 | Terpineol 350 | 60-85 | 60.00 |
| 2 | Butyl carbitol | 8-40 | 24.00 |
| 3 | Alcohol ester 12 | 2-15 | 16.00 |
| 4 | Add up to | 100.00 part |
(3) organic carrier preparation
Above-mentioned intermediate a, thinner a, BYK410, BYK180 are prepared according to following recipe, obtains the aluminium paste organic carrier of different viscosity;
Table 3 organic carrier preparation formula (weight part)
| Sequence number | Material name | Carrier 1 | Carrier 2 | Carrier 3 | Carrier 4 |
| 1 | Intermediate a | 5.75 | 7.67 | 9.20 | 11.50 |
| 2 | Thinner a | 17.25 | 15.33 | 13.80 | 11.50 |
| 3 | BYK410 | 0.50 | 0.50 | 0.50 | 0.50 |
| 4 | BYK180 | 0.50 | 0.50 | 0.50 | 0.50 |
| 5 | Add up to | 24.00 parts | 24.00 parts | 24.00 parts | 24.00 parts |
2, aluminium paste preparation
As shown in Figure 2, by 75% aluminium powder, 1% glass powder, 24% organic carrier, put into after mixing 3 hours in double planetary mixer, be distributed to≤20um with three-roll grinder, then after vacuum defoamation, obtain the Paste type aluminum slurry of viscosity in 25-60Pa.s series.
Table 4 aluminium paste sample proportioning (mass percent)
As can be seen from Table 4, with the organic carrier of equal in quality content, but the formula difference of organic carrier (thinner is different with the ratio of intermediate), the aluminium paste of different viscosity can be obtained, that is by adjusting the content of intermediate and thinner, the object of adjustment aluminium paste viscosity is reached.Consider that the requirement of battery producer is different, some producer may wish that the viscosity of aluminium paste is 25Pa.S, and some producer may desirably 45Pa.S, and the range of viscosities of industry requirement aluminium paste is at 20-60Pa.S.Technology easily like this is not had to adjust the viscosity of aluminium paste in prior art.
3, aluminium paste application
To 4 sections of aluminium paste samples in table 4 be prepared, and produce Wiring technology flow manufacturing silicon solar cell according to battery, require aluminium back surface field making link, 156*156 polysilicon chip, 250 order stainless steel half tones, printing weight in wet base control 1.4-1.5g/pcs.Here is the battery performance of four sections of aluminium pastes;
Table 5 silicon solar cell performance
As can be seen from Table 5, this a few money aluminium paste is all the requirement that can reach current industry, after namely passing through the ratio of adjustment intermediate and thinner, can obtain the aluminium paste of different viscosity, and all can reach service requirements, the silicon solar cell performance of preparation is good.
Above embodiment is described embodiments of the present invention, but these embodiments are only for exemplary purposes instead of limit the present invention.Those skilled in the art can under the prerequisite not deviating from scope and spirit of the present invention; embodiment is carried out changing and revising; the equivalence invention design completed under all belonging to disclosed spirit, and should drop within protection scope of the present invention.
Claims (4)
1. an Organic carrier for crystalline silicon photovoltaic cell aluminum paste, is characterized in that, is made up of the component of following weight part:
10 parts-99 parts, intermediate;
Thinner 1 part-89 parts;
Thixotropic agent BYK410 0.1 part-5 parts;
Dispersant B YK180 0.1 part-5 parts;
Described intermediate is by polymkeric substance and solvent composition, and wherein the weight percent of polymkeric substance and solvent is: Ju He Wu ︰ solvent=0.1-20 ︰ 80-90; Described polymkeric substance be selected from soluble cotton, acrylic resin, rosin modified phenolic resin one or more; Described solvent be selected from diethylene glycol methyl ether, diethylene glycol ethyl ether, butyl carbitol, phenylcarbinol, Terpineol 350, tributyl citrate, alcohol ester 12, Viscotrol C and hexadecanol one or more;
Described Organic carrier for crystalline silicon photovoltaic cell aluminum paste preparation method is: first by the solvent post-heating chosen to 80 DEG C-120 DEG C, then add polymkeric substance in proportion, be stirred to polymkeric substance and dissolve completely, then be incubated 2-3 hour at 80 DEG C-120 DEG C, cooling, filters to obtain intermediate; Then in described intermediate, add thinner, thixotropic agent and dispersion agent, mix.
2. a kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste according to claim 1, is characterized in that, be made up of the component of following weight part:
3 parts-12 parts, intermediate;
Thinner 3 parts-12 parts;
Thixotropic agent 0.1 part-5 parts;
Dispersion agent 0.1 part-5 parts.
3. a kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste according to claim 1 or 2, is characterized in that, the weight percent of described polymkeric substance and solvent is: Ju He Wu ︰ solvent=12-20 ︰ 80-90.
4. a kind of Organic carrier for crystalline silicon photovoltaic cell aluminum paste according to claim 1 or 2, it is characterized in that, described thinner be selected from diethylene glycol dimethyl ether, diethylene glycol ether, butyl carbitol, Terpineol 350, tributyl citrate, alcohol ester 12, Viscotrol C and hexadecanol one or more.
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