CN105280265A - Solar cell electrode slurry, preparation method, cell electrode and solar cell - Google Patents
Solar cell electrode slurry, preparation method, cell electrode and solar cell Download PDFInfo
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Abstract
The invention discloses one kind of solar cell electrode slurry comprising an organic carrier and silver powder, glass powder and an antifoaming agent which are dispersed in the organic carrier. The silver powder comprises micrometer silver particles, nanometer silver particles and silver nano wires which are 2-8 [mu]m in length and 100-200 nm in diameter, and silver nano wires account for 50-80% of the total mass of the silver powder. According to the invention, the silver powder mostly is prepared by the silver nano wires which are stable in preparation process and lower in cost relative to nanometer silver particles, so that the material cost of the electrode slurry is effectively lowered; in addition, gaps of the silver power can be filled by silver nano wires, micrometer silver particles and nanometer silver particles, so that conductive paths are added and a conductive network is formed, and the volume resistivity of the electrode material is lowered. At the same time, the invention further discloses a preparation method of the electrode slurry, and a cell electrode and a solar cell using the electrode slurry.
Description
Technical field
The present invention relates to field of batteries, particularly relate to a kind of solar battery electrode slurry, preparation method, battery electrode and solar cell.
Background technology
Solar cell conductive silver starches the mechanical impurity slurry formed according to a certain percentage primarily of silver powder (conductive phase or conductive filler), glass dust (Binder Phase), organic carrier and other additives (auxiliary material).Silver powder is as conductive phase in silver slurry, and its average grain diameter, content, dispersiveness etc. all have very large impact to the performance of silver slurry.First, the average grain diameter of silver powder can affect printing and the sintering character of silver slurry, thus has an impact to the electrical property of solar cell.Research shows, if silver powder average grain diameter is comparatively large, then can blocks half tone when silk screen printing, make slurry can not leak through half tone and obtain electrode pattern; If but silver powder average grain diameter is less, then have higher specific surface energy, very easily reunite and form silver bullion in sintering process, the Argent grain that after cooling, recrystallization obtains reduces, and increases the specific contact resistivity of electrode.Secondly, the dispersiveness of silver powder in silver slurry also has a significant impact solar cell properties.Research shows, after the silver slurry sintering prepared, caking does not occur but forms compact texture, thus improve the performance of solar cell to a great extent with the silver powder of good dispersion (or by silver powder surface organically-modified).3rd, the range of choice of silver powder average grain diameter is generally 0.1 ~ 20.0 micron, also patent report is had to claim (US20070187652A, US20070138659A) to use the silver powder of two or more different average grain diameter to prepare solar cell conductive silver slurry at present, the fine crack that can suppress the increase of contact resistance after the sintering and produce when forming electrode, improves the conductivity of battery.
Adopt nanoscale (or nano/micron mixing) silver powder to have as conductive filler can obtain more fine and close electrode coating, the inexorable trend that the technical advantages such as sintering temperature have become current solar cell conductive paste can be reduced.But, current nanoscale silver powder material uses chemical method to produce mostly, there is technological parameter complexity, output is little, composition is single, need to carry out the environmental issues such as sewage disposal in the difficult control of quality stability and production process, and, adopt nanoscale (or nano/micron mixing) silver powder to be that conductive filler cost is high.
In order to solve the high problem of conductive filler cost, many researchers adopt coating technology to prepare the coated copper powder of hud typed silver (namely at superfine cupper powder Surface coating one deck silver atoms), thus improve non-oxidizability and the electric conductivity of superfine cupper powder, the one-tenth simultaneously reducing conductive filler produces cost.But; solution phase chemical reduction is adopted to prepare in the process of the coated copper powder of nucleocapsid structure silver; the factors such as raw material copper powder, silver nitrate concentration, complexing agent, reducing agent, reaction temperature, mixing speed, pH value and additive (as dispersant, protective agent) all can affect SOLUTION PROPERTIES, the surface activity of core and the deposition rate of silver particles in its coated process, thus affect the quality of silver coating and the performance characteristic of silver-colored coated copper powder.Therefore, current nucleocapsid structure silver coated copper powder preparation technique is complicated, and exist coated initial time easily there is the problems such as the reliable and stable not and silver salt utilance of hydrolysis phenomena, covered effect is low.
Summary of the invention
For above-mentioned prior art present situation, the invention provides a kind of solar battery electrode slurry, preparation method, battery electrode and solar cell, reduce electrode slurry cost, reduce specific insulation simultaneously.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of solar battery electrode slurry, comprise organic carrier and be dispersed in silver powder, glass dust and the defoamer in described organic carrier, described silver powder includes micron Argent grain and nano-Ag particles, described silver powder also includes that length is 2 ~ 8 μm, diameter is the nano silver wire of 100 ~ 200nm, and the percentage that described nano silver wire accounts for silver powder gross mass is 50 ~ 80%.
Wherein in an embodiment, the average grain diameter of described micron Argent grain is 50 ~ 100nm, and the percentage that described micron Argent grain accounts for silver powder gross mass is 15 ~ 24%.
Wherein in an embodiment, the average grain diameter of described nano-Ag particles is 0.1 ~ 2 μm, and the percentage that described nano-Ag particles accounts for silver powder gross mass is 3 ~ 7%.
Wherein in an embodiment, described silver powder is prepared from by the following method:
First described nano silver wire, described nano-Ag particles and described micron Argent grain are dissolved in ethanol respectively and obtain nano silver wire dispersion liquid, dispersed nano-silver particles liquid and micron Argent grain dispersion liquid;
Again described nano silver wire dispersion liquid, described dispersed nano-silver particles liquid and described micron Argent grain dispersion liquid are joined in constant temperature water bath in batches, and reach Homogeneous phase mixing by batch carrying out ultrasonic agitation dispersion;
Then constant temperature drying obtains described silver powder.
Wherein in an embodiment, the mass percent of described silver powder is 73 ~ 86%.
Wherein in an embodiment, the mass percent of described glass dust is 5 ~ 10%.
Wherein in an embodiment, described glass dust comprises following component by mass percentage:
Average grain diameter is the SiO of 1 ~ 4 μm
2: 10 ~ 20%
Average grain diameter is the Bi of 1 ~ 4 μm
2o
3: 15 ~ 30%
Average grain diameter is the B of 1 ~ 4 μm
2o
3: 15 ~ 30%
Average grain diameter is the BaO/Ba of 1 ~ 4 μm
2cO
3: 10 ~ 20%
Average grain diameter is the γ-Al of 0.05 ~ 0.1 μm
2o
3: 20 ~ 30%
Average grain diameter is ZnO:5 ~ 10% of 1 ~ 4 μm.
Wherein in an embodiment, the mass percent of described organic carrier is 9 ~ 14%.
Wherein in an embodiment, described organic carrier comprises following component by mass percentage:
Organic solvent: 76 ~ 90%
Thickener: 3 ~ 9%
Surfactant: 3 ~ 7%
Curtain coating controlling agent: 3 ~ 5%
Thixotropic agent: 1 ~ 3%;
Wherein, described organic solvent is one or more in terpinol, tributyl citrate, dibutyl phthalate, ethyl carbitol or butyl carbitol; Described thickener is the mixed solution of methylcellulose and polyvinyl alcohol water solution, described methylcellulose is one or more in hydroxypropyl methylcellulose, sodium carboxymethylcellulose, ethyl cellulose, hydroxyethylcellulose, and described polyvinyl alcohol water solution is one or more in acrylic emulsion, polyacrylate dispersion; Described surfactant is the mixed solution of ethanol or polyethylene glycol and ammonium polyacrylate or lecithin; Described thixotropic agent is one or more in aerosil, bentonite, calcium silicates or castor oil.
Wherein in an embodiment, also comprise defoamer, the mass percent of described defoamer is 1 ~ 2%.
Wherein in an embodiment, described defoamer is the mixed solution of ethanol and methyl-silicone oil or polypropylene glycerol aether.
The preparation method of a kind of solar battery electrode slurry provided by the invention, comprises the steps:
Described silver powder, glass dust, organic carrier and a part of described defoamer are added ball mill be successively uniformly mixed, after mix through ultrasonic disperse;
Drip in the mixed slurry disperseed at above-mentioned ball grinding stirring and ultrasonic wave by formula and remain described defoamer, low speed ball milling 0.1 ~ 0.2hour, ball milling speed is 100 ~ 150r/min, then this slurry is poured in vacuum stirring getter and eliminate the small-sized bubble of slurry internal residual, the rotating speed of stirrer paddle controls at 50 ~ 100r/min, vacuum degree control is between-0.05 ~ 0.1Pa, and degasification time controling is at 0.2 ~ 1hour.
A kind of electrode of solar battery provided by the invention, described battery electrode adopts following methods to be prepared from:
Described electrode slurry is uniformly coated on monocrystalline silicon substrate by silk-screen printing technique, then carries out the gentle drying and processing of downwelling of slurry coating; With
Electrode material semi-finished product after drying and processing are put into microwave silver ink firing stove to carry out conductive silver paste burning infiltration process and namely obtain battery electrode.
A kind of solar cell provided by the invention, described solar cell comprises above-mentioned battery electrode.
Compared with prior art, solar battery electrode slurry provided by the invention, because silver powder major part adopts existing stable preparation process and the cost nano silver wire more cheap relative to nano-Ag particles, effectively reduces the material cost of electrode slurry; Further, because nano silver wire and micron Argent grain and nano-Ag particles can fill mutually silver powder gap, thus add conductive path to form conductive network, the specific insulation that electrode slurry burns till electrode material can be reduced further.
The preparation method of electrode slurry provided by the invention, adopts the hybrid mode that ball grinding stirring and ultrasonic wave disperse, and utilizes the mode of defoamer and vacuum stirring degasification thoroughly to eliminate the bubble configuring and produce in slurry process.
In addition, electrode of solar battery provided by the invention adopts microwave sintering process sintering slurry coating, not only effectively reduces energy consumption relative to traditional electrical thermal sintering mode, and can burn till the high electrode material of compactness extent fast.
Accompanying drawing explanation
Fig. 1 is the Argent grain microscopic appearance schematic diagram of nano silver wire;
Fig. 2 is the Argent grain microscopic appearance schematic diagram of solar battery electrode slurry.
Embodiment
In one of them embodiment of the present invention, a kind of solar battery electrode slurry is provided, this solar battery electrode slurry comprises organic carrier and is dispersed in silver powder, glass dust and the defoamer in described organic carrier, wherein, the mass percent of described silver powder is 73 ~ 86%, described silver powder includes nano silver wire, micron Argent grain and nano-Ag particles, and the percent mass of nano silver wire, micron Argent grain and nano-Ag particles when dimensions sees the following form 1:
Table 1:
Solar battery electrode slurry of the present invention, because silver powder major part is stable preparation process and the cost nano silver wire more cheap relative to nano-Ag particles, therefore effectively reduces the material cost of electrode slurry; And, because nano silver wire and micron Argent grain and nano-Ag particles can fill mutually silver powder gap, thus add conductive path to form conductive network, therefore will reduce further electrode slurry and burn till the specific insulation of electrode material.The Argent grain microscopic appearance of nano silver wire and silver powder is see Fig. 1 and Fig. 2.
In order to make nano silver wire, micron Argent grain and nano-Ag particles mix, the silver powder in the present embodiment is prepared from by the following method: first nano silver wire, nano-Ag particles and micron Argent grain are dissolved in respectively obtained nano silver wire dispersion liquid, dispersed nano-silver particles liquid and micron Argent grain dispersion liquid in ethanol; Again described nano silver wire dispersion liquid, described dispersed nano-silver particles liquid and described micron Argent grain dispersion liquid are joined in constant temperature water bath in batches, and reach Homogeneous phase mixing by batch carrying out ultrasonic agitation dispersion; Then constant temperature drying obtains described silver powder.
The mass percent of described glass dust is 5 ~ 10%, and the component of described glass dust and mass percent thereof see the following form 2:
Table 2:
As can be seen from Table 2, the glass dust in the present embodiment is lead-free glass powder.The preparation method of glass dust is as follows: take each component in corundum crucible by formula rate, and stirring to be placed in Muffle furnace is heated to 1100 DEG C with stove, and is incubated 20Min; Pour rapidly deionization quenching-in water into afterwards, then dried through ball milling by the glass dregs obtained, final sizing obtains required glass dust.Wherein, ball-milling medium is absolute ethyl alcohol, zirconium oxide balls (diameter of big-and-middle bead be respectively 10,5 and 1mm), mass ratio are 3: 2: 1, and ratio of grinding media to material is 2: 1, and ball milling speed is 400r/Min, and Ball-milling Time is 12hours; Further, the average grain diameter of above-mentioned glass dust is 2 ~ 5 μm, softening temperature is 570 DEG C.
The mass percent of described organic carrier is 9 ~ 14%, described organic carrier component and mass percent see the following form 3:
Table 3:
| The each ingredient names of organic carrier | Mass percent (%) |
| Organic solvent | 76～90 |
| Thickener | 3～9 |
| Surfactant | 3～7 |
| Curtain coating controlling agent | 3～5 |
| Thixotropic agent | 1～3 |
In table 3, organic solvent is one or more in terpinol, tributyl citrate, dibutyl phthalate, ethyl carbitol or butyl carbitol.Thickener is the mixed solution of methylcellulose (methylcellulose is one or more in hydroxypropyl methylcellulose, sodium carboxymethylcellulose, ethyl cellulose, hydroxyethylcellulose) and polyvinyl alcohol water solution (polyvinyl alcohol water solution is one or more in acrylic emulsion, polyacrylate dispersion), and the preferred percent example of the two is 64 ~ 73%: 27 ~ 36%.Surfactant is the mixed solution of ethanol or polyethylene glycol (PEG) and ammonium polyacrylate or lecithin, and the preferred percent example of the two is 61 ~ 70%: 30 ~ 39%.Curtain coating controlling agent is the mixed solution of terephthalic acids or furancarboxylic acid and silane coupler or polyvinyl butyral resin, and the preferred percent example of the two is 72 ~ 78%: 22 ~ 28%.Thixotropic agent is one or more in aerosil, bentonite, calcium silicates or castor oil.Defoamer is then the mixed solution of ethanol (fatty alcohol) and methyl-silicone oil (dimethicone) or polypropylene glycerol aether, and the preferred percent example of the two is 68 ~ 73%: 27 ~ 32%.
The compound method of organic solvent is as follows: be mixed into container after taking all kinds of organic solvent by formula rate, fully dissolved by the mixed solution of all kinds of organic solvent in constant temperature water bath, then obtains the moderate organic carrier of rheological property through ultrasonic agitation dispersion; Wherein, the technological parameter of ultrasonic disperse is: ultrasonic vibration frequency is 80 ~ 120KHz, and power is 500W, and the processing time is 20Min.
In another embodiment of the present invention, a kind of preparation method of electrode slurry is provided, comprises the steps:
(1) slurry mixing: described silver powder, glass dust, organic carrier and a part (40 ~ 60%) described defoamer are added ball mill successively and are uniformly mixed, after through ultrasonic disperse mixing, regulate slurry viscosity further.Wherein, the ultrasonic disperse technological parameter of defoamer is: ultrasonic vibration frequency is 100KHz, and power is 500W, and the processing time is 18Min; The ball grinding stirring technological parameter of this mixed slurry is: mill ball particle diameter is 2mm, and ball feed-weight ratio is 1: 10, and Ball-milling Time is 0.2hour, and ball milling speed is 150r/min; The ultrasonic disperse technological parameter of this mixed slurry is: ultrasonic vibration frequency is 300KHz, and power is 500W, and the processing time is 20Min.
(2) slurry degasification: drip in the mixed slurry disperseed at above-mentioned ball grinding stirring and ultrasonic wave by formula and remain described defoamer, low speed ball milling 0.1 ~ 0.2hour, ball milling speed is 100 ~ 150r/min; Then poured in vacuum stirring getter by this slurry and eliminate the small-sized bubble of slurry internal residual, the rotating speed of stirrer paddle controls at 50 ~ 100r/min, and vacuum degree control is between-0.05 ~ 0.1Pa, and degasification time controling is at 0.2 ~ 1hour.
Existing solar battery electrode slurry preparation technology adopts three roller roll squeezers to carry out conductive filler, glass dust and organic carrier mixing dispersion usually, in preparation process, not only easily cause the introducing of impurity, and be difficult to the micro-bubble (even if adding proper quantity of defoaming agent) eliminated in mixed process, thus affect the dispersiveness of slurry, mobility and quality stability.And the preparation method of electrode slurry of the present invention, adopt the hybrid mode that ball grinding stirring and ultrasonic wave disperse, and utilize the mode of defoamer and vacuum stirring degasification thoroughly to eliminate the bubble configuring and produce in slurry process.Wherein, defoamer is mainly used to the air pocket eliminating pulp surface, and vacuum stirring degasification mode is then mainly used to the minute bubbles eliminating slurry inside.
In another embodiment of the present invention, provide a kind of electrode of solar battery, this battery electrode adopts following methods to be prepared from:
Described electrode slurry is uniformly coated on monocrystalline silicon substrate by silk-screen printing technique, then carries out the gentle drying and processing of downwelling of slurry coating.Wherein, sedimentation flow time is; Bake out temperature is 150 DEG C, drying time is 20Min; Then, the electrode material semi-finished product of slurry coating after drying and processing are put into microwave silver ink firing stove to carry out conductive silver paste burning infiltration process and namely obtain metallization silver electrode rete; Wherein, microwave frequency 2.45GHz, power 1.5KW, peak temperature is 780 DEG C, sintering total time is 8Min.
Existing solar battery electrode slurry preparation technology adopts traditional electrical thermal sintering mode to prepare electrode material, such as continuous tunnel furnace, box type furnace etc. usually, be both unfavorable for the stability controlling sintering temperature, and electric energy loss is serious.And the electrode of solar battery of the embodiment of the present invention, adopt microwave sintering process to prepare electrode material, not only traditional electrical thermal sintering mode effectively reduces energy consumption relatively, and can burn till the high electrode material of compactness extent fast.
Below by specific embodiment, the present invention is described in detail:
Environment protection solar cell provided by the invention conduction printing slurry and preparation method thereof, its concrete implementation step and technological parameter as follows:
(1) electrode slurry preparation: join in batches in constant temperature water bath by the alcohol dispersion liquid of formula rate shown in table 4 by the nano silver wire after chemical purification, micron Argent grain and nano-Ag particles, and reach Homogeneous phase mixing by batch carrying out ultrasonic agitation dispersion, then carry out constant temperature drying and obtain silver powder.
(2) glass dust preparation: take each component oxide in corundum crucible by formula rate shown in table 4, stirring to be placed in Muffle furnace is heated to 1100 DEG C with stove, and is incubated 20Min; Pour rapidly deionization quenching-in water into afterwards, then dried through ball milling by the glass dregs obtained, final sizing obtains required glass dust.Wherein, ball-milling medium is absolute ethyl alcohol, zirconium oxide balls (diameter of big-and-middle bead be respectively 10,5 and 1mm), mass ratio are 3: 2: 1, and ratio of grinding media to material is 2: 1, and ball milling speed is 400r/Min, and Ball-milling Time is 12hours; Further, the average grain diameter of above-mentioned glass dust is 2 ~ 5 μm, softening temperature is 570 DEG C.
(3) organic carrier preparation: be mixed into container after taking all kinds of organic solvent by formula rate shown in table 4, the mixed solution of all kinds of organic solvent is fully dissolved in constant temperature water bath, then obtain the moderate organic carrier of rheological property through ultrasonic agitation dispersion; Wherein, the technological parameter of ultrasonic disperse is: ultrasonic vibration frequency is 80 ~ 120KHz, and power is 500W, and the processing time is 20Min.
(4) slurry mixing: above-mentioned silver powder, glass dust, organic carrier and the defoamer through ultrasonic disperse process are added ball mill successively and are uniformly mixed, after through ultrasonic disperse be mixed into one step joint slurry viscosity.Wherein, the ultrasonic disperse technological parameter of defoamer is: ultrasonic vibration frequency is 100KHz, and power is 500W, and the processing time is 18Min; The ball grinding stirring technological parameter of this mixed slurry is: mill ball particle diameter is 2mm, and ball feed-weight ratio is 1: 10, and Ball-milling Time is 0.2hour, and ball milling speed is 150r/min; The ultrasonic disperse technological parameter of this mixed slurry is: ultrasonic vibration frequency is 300KHz, and power is 500W, and the processing time is 20Min.
(5) slurry degasification: drip proper quantity of defoaming agent, low speed ball milling 0.2hour in the mixed slurry disperseed at above-mentioned ball grinding stirring and ultrasonic wave by formula, ball milling speed is 150r/min; Then poured in vacuum stirring getter by this slurry and eliminate the small-sized bubble of slurry internal residual, the rotating speed of stirrer paddle controls at 80r/min, and vacuum degree control is between 0.05Pa, and degasification time controling is at 0.5hour.
(6) rheology testing: adopt BrookfieldAST-100 type sonde-type viscosity sensor to measure viscosity and the thixotropic coefficient of above-mentioned conduction printing slurry.
(7) silk screen printing and levelling are dried: be uniformly coated on monocrystalline silicon substrate by electrode slurry qualified for above-mentioned rheologic behavio(u)r by silk-screen printing technique, then carry out the gentle drying and processing of downwelling of slurry coating.Wherein, sedimentation flow time is; Bake out temperature is 150 DEG C, drying time is 20Min.
(8) microwave sintering electrode material: the electrode material semi-finished product of slurry coating after drying and processing are put into microwave silver ink firing stove and carry out conductive silver paste burning infiltration process and namely obtain metallization silver electrode rete.Wherein, microwave frequency 2.45GHz, power 1.5KW, peak temperature is 780 DEG C, sintering total time is 8Min;
(9) dielectric property detect: after lowering the temperature, take out electrode material finished product, and tester surveys its surface resistivity, the sintering adhesive force of silverskin and the opto-electronic conversion performance parameter of monocrystaline silicon solar cell sheet.
The electrode slurry of specific embodiment and the performance of corresponding front electrode of solar battery refer to following table 4:
Table 4:
Comparative examples
Comparative examples is except the formula difference of silver powder, and all the other steps are identical with the step of above-described embodiment.The formula of the silver powder of comparative examples is as following table 5:
Table 5:
The electrode slurry of comparative examples and the performance of corresponding front electrode of solar battery refer to following table 6:
Table 6:
| Silverskin surface resistivity (m Ω/S) | 3.02～6.03 |
| Interfacial adhesion (N/ (2 × 2) mm 2) | 8.24～23.1 |
| Photoelectric conversion efficiency (%) | 17.2～17.8 |
As can be seen from table 4,6, the front electrode of solar battery adopting the solar battery electrode slurry of the embodiment of the present invention and preparation method to obtain, effectively reduces silverskin surface resistivity, further increases interfacial adhesion and photoelectric conversion efficiency.
To sum up, the solar battery electrode slurry that the embodiment of the present invention provides, preparation method, battery electrode and solar cell, greatly reduce material cost, and battery performance have also been obtained and promotes to a certain extent simultaneously.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (14)
1. a solar battery electrode slurry, comprise organic carrier and be dispersed in silver powder, glass dust and the defoamer in described organic carrier, described silver powder includes micron Argent grain and nano-Ag particles, it is characterized in that, described silver powder also includes that length is 2 ~ 8 μm, diameter is the nano silver wire of 100 ~ 200nm, and the percentage that described nano silver wire accounts for silver powder gross mass is 50 ~ 80%.
2. solar battery electrode slurry according to claim 1, is characterized in that, the average grain diameter of described micron Argent grain is 50 ~ 100nm, and the percentage that described micron Argent grain accounts for silver powder gross mass is 15 ~ 24%.
3. solar battery electrode slurry according to claim 1, is characterized in that, the average grain diameter of described nano-Ag particles is 0.1 ~ 2 μm, and the percentage that described nano-Ag particles accounts for silver powder gross mass is 3 ~ 7%.
4. solar battery electrode slurry according to claim 1, is characterized in that, described silver powder is prepared from by the following method:
First described nano silver wire, described nano-Ag particles and described micron Argent grain are dissolved in ethanol respectively and obtain nano silver wire dispersion liquid, dispersed nano-silver particles liquid and micron Argent grain dispersion liquid;
Again described nano silver wire dispersion liquid, described dispersed nano-silver particles liquid and described micron Argent grain dispersion liquid are joined in constant temperature water bath in batches, and reach Homogeneous phase mixing by batch carrying out ultrasonic agitation dispersion;
Then constant temperature drying obtains described silver powder.
5. solar battery electrode slurry according to claim 1, is characterized in that, the mass percent of described silver powder is 73 ~ 86%.
6. solar battery electrode slurry according to claim 1, is characterized in that, the mass percent of described glass dust is 5 ~ 10%.
7. solar battery electrode slurry according to claim 1, is characterized in that, described glass dust comprises following component by mass percentage:
Average grain diameter is the SiO of 1 ~ 4 μm
2: 10 ~ 20%
Average grain diameter is the Bi of 1 ~ 4 μm
2o
3: 15 ~ 30%
Average grain diameter is the B of 1 ~ 4 μm
2o
3: 15 ~ 30%
Average grain diameter is the BaO/Ba of 1 ~ 4 μm
2cO
3: 10 ~ 20%
Average grain diameter is the γ-Al of 0.05 ~ 0.1 μm
2o
3: 20 ~ 30%
Average grain diameter is ZnO:5 ~ 10% of 1 ~ 4 μm.
8. solar battery electrode slurry according to claim 1, is characterized in that, the mass percent of described organic carrier is 9 ~ 14%.
9. solar battery electrode slurry according to claim 1, is characterized in that, described organic carrier comprises following component by mass percentage:
Organic solvent: 76 ~ 90%
Thickener: 3 ~ 9%
Surfactant: 3 ~ 7%
Curtain coating controlling agent: 3 ~ 5%
Thixotropic agent: 1 ~ 3%;
Wherein, described organic solvent is one or more in terpinol, tributyl citrate, dibutyl phthalate, ethyl carbitol or butyl carbitol; Described thickener is the mixed solution of methylcellulose and polyvinyl alcohol water solution, described methylcellulose is one or more in hydroxypropyl methylcellulose, sodium carboxymethylcellulose, ethyl cellulose, hydroxyethylcellulose, and described polyvinyl alcohol water solution is one or more in acrylic emulsion, polyacrylate dispersion; Described surfactant is the mixed solution of ethanol or polyethylene glycol and ammonium polyacrylate or lecithin; Described thixotropic agent is one or more in aerosil, bentonite, calcium silicates or castor oil.
10. solar battery electrode slurry according to claim 1, is characterized in that, the mass percent of described defoamer is 1 ~ 2%.
11. solar battery electrode slurries according to claim 1, is characterized in that, described defoamer is the mixed solution of ethanol and methyl-silicone oil or polypropylene glycerol aether.
12. 1 kinds as the preparation method of the solar battery electrode slurry in claim 1 to 11 as described in any one, is characterized in that, comprise the steps:
Described silver powder, glass dust, organic carrier and a part of described defoamer are added ball mill be successively uniformly mixed, after mix through ultrasonic disperse;
Drip in the mixed slurry disperseed at above-mentioned ball grinding stirring and ultrasonic wave by formula and remain described defoamer, low speed ball milling 0.1 ~ 0.2hour, ball milling speed is 100 ~ 150r/min, then this slurry is poured in vacuum stirring getter and eliminate the small-sized bubble of slurry internal residual, the rotating speed of stirrer paddle controls at 50 ~ 100r/min, vacuum degree control is between-0.05 ~ 0.1Pa, and degasification time controling is at 0.2 ~ 1hour.
13. 1 kinds of electrode of solar battery, is characterized in that, described battery electrode adopts following methods to be prepared from:
Such as the electrode slurry in claim 1 to 11 as described in any one is uniformly coated on monocrystalline silicon substrate by silk-screen printing technique, then carries out the gentle drying and processing of downwelling of slurry coating; With
Electrode material semi-finished product after drying and processing are put into microwave silver ink firing stove to carry out conductive silver paste burning infiltration process and namely obtain battery electrode.
14. 1 kinds of solar cells, is characterized in that, described solar cell comprises battery electrode as claimed in claim 13.
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| CN106024100A (en) * | 2016-07-20 | 2016-10-12 | 苏州顾氏新材料有限公司 | Low-temperature conductive silver paste and preparation method and application thereof |
| CN106356471A (en) * | 2016-10-17 | 2017-01-25 | 东莞理工学院 | Curing method of OLED (Organic Light Emitting Diode) device cathode |
| CN107068240A (en) * | 2017-02-20 | 2017-08-18 | 江苏瑞德新能源科技有限公司 | A kind of back silver paste |
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| CN108711462A (en) * | 2018-05-25 | 2018-10-26 | 重庆邦锐特新材料有限公司 | A kind of conductive silver paste without glass powder and preparation method thereof and sintering method |
| CN108735339A (en) * | 2018-05-25 | 2018-11-02 | 重庆邦锐特新材料有限公司 | A kind of high performance sintered conductive silver paste and preparation method thereof and sintering method |
| CN109961871A (en) * | 2018-08-15 | 2019-07-02 | 浙江光达电子科技有限公司 | It is a kind of to be sintered the slurry to form transparent conductor and application for silk-screen |
| CN109961871B (en) * | 2018-08-15 | 2020-09-15 | 浙江光达电子科技有限公司 | Slurry for forming transparent conductor by silk-screen sintering and application |
| CN112349886A (en) * | 2019-08-06 | 2021-02-09 | 北京梦之墨科技有限公司 | Self-generating electrode material, negative electrode and self-generating structure |
| CN110379570A (en) * | 2019-08-09 | 2019-10-25 | 大连海外华昇电子科技有限公司 | A kind of multilayer ceramic capacitor nickel slurry manufacture craft and application |
| CN113257454A (en) * | 2021-04-15 | 2021-08-13 | 中国科学院山西煤炭化学研究所 | Titanium and calcium doped PERC solar cell front silver paste and preparation method thereof |
| CN114093553A (en) * | 2021-11-18 | 2022-02-25 | 江苏聚盈新材料科技有限公司 | Organic carrier for crystalline silicon solar cell front silver paste, preparation method, application and method for evaluating conversion efficiency of cell piece |
| CN116259434A (en) * | 2021-12-10 | 2023-06-13 | 苏州星烁纳米科技有限公司 | Low-resistance conductive silver paste, conductive film and preparation method of conductive film |
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