CN105621896B - Glass dust for rear surface of solar cell electrode slurry and preparation method thereof - Google Patents
Glass dust for rear surface of solar cell electrode slurry and preparation method thereof Download PDFInfo
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- CN105621896B CN105621896B CN201511016300.XA CN201511016300A CN105621896B CN 105621896 B CN105621896 B CN 105621896B CN 201511016300 A CN201511016300 A CN 201511016300A CN 105621896 B CN105621896 B CN 105621896B
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- glass dust
- solar cell
- silica
- rear surface
- solution
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/213—SiO2
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Photovoltaic Devices (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses a kind of for glass dust of rear surface of solar cell electrode slurry and preparation method thereof.The present invention is coated using Ludox to glass dust, has been delayed the softening of glass dust, has been reduced etching time of the glass to silicon chip of softening, has reduced corrosivity of the glass to silicon chip, and then reduce the destruction to passivation layer.
Description
Technical field
The present invention relates to technical field of solar batteries, and in particular to photovoltaic industry high-performance silver conductor paste, especially
It is related to a kind of for glass dust of rear surface of solar cell electrode slurry and preparation method thereof.
Background technology
Photovoltaic element (photovoltaic device) easily takes because it will originate in light source (for example, sunshine)
Energy be converted into electric power, to manipulate for example, the electronic installation such as computer, computer, heater, so photovoltaic is first
Part has been widely used.Most common photovoltaic element is silica-based solar cell.
Silica-based solar cell, which refers to utilize, to be derived from made by the crystallization silicon substrate of monocrystalline silicon crystal bar or polycrystalline silicon ingot casting
Solar cell.On silica-based solar cell formed electrode prior art, first silica-based solar cell front surface and
On back surface using, it is necessary to perform two-step sintering program, could be formed after the processing procedure coating metal slurry such as screen painting have it is good
The metal electrode of good Ohmic contact.Typical silica-based solar cell, its front surface applying conductive silver paste, the coating of its back surface
Conducting aluminum paste and conductive silver paste (or conductive silver aluminium paste).
Chinese patent application 201280009271.2 disclose it is a kind of " the silver-colored backplate that is used to forming passivation emitter and
The method of rear-face contact silicon solar cell ", used silver paste therein includes at least one frit（Glass dust）.Burning
During knot, the frit of fusing can produce corrosion to silicon chip, and then produce destruction to passivation layer.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of glass dust and its preparation for rear surface of solar cell electrode slurry
Method, is first coated using low melting point, volatilizable high polymer material to glass dust, has been delayed the softening of glass dust and has been melted
Change, to reduce the corrosivity to silicon chip of glass dust, and then reduce the destruction to passivation layer.
Technical scheme is as follows：
A kind of glass dust for rear surface of solar cell electrode slurry, the glass dust is coated with low melting point, can waved
The silica sol layer of hair.
One of main points of technical scheme of technical problem of solution prior art of the present invention are to select suitable macromolecule
Material coats glass dust, in order to delay surface erosion of the glass dust to solar cell in sintering process, rather than
Corroded in order to avoid this, accordingly, it would be desirable to the relatively low high polymer material of fusing point, if the high polymer material fusing point selected is too high
Words, can influence the erosion of sintering process；Simultaneously, it is also desirable to vapor away the high polymer material as far as possible after sintering terminates, subtract
Few influence to printed wire in itself, so to select volatilizable high polymer material.
In high polymer material, Ludox belongs to colloidal solution, odorless, nontoxic, and molecular formula is represented by mSiO2·nH2O。
Because the colloidal particle of Ludox is fine (10-20nm), there is sizable specific surface area, particle water white transparency itself, not shadow
Ring the true qualities being covered by；And its viscosity is relatively low, the permeable place of water can be permeated, therefore mix the time-division with other materials
Dissipate property and permeability is all very good；When Ludox moisture evaporation, colloidal particle is securely attached to the object of silver conductive paste
Silica is formed between surface, particle to combine, and is good adhesive.
A kind of preparation method for above-mentioned glass dust for rear surface of solar cell electrode slurry that the present invention is provided, bag
Include following steps：
(1) ethanol, sodium sulphate etc. are added in the weak solution of 20~40wt% soluble silicates, by adjusting sodium ion
The content of silica is in 10-18% in the viscosity of concentration, further regulation solution, regulation solution；
(2) glass dust is added in system obtained by above-mentioned steps (1), is glass dust according to part by weight：Silica=2
~3：3~5 ratio allotment；
(3) system obtained by above-mentioned steps (2) after stirring 5-8 hour, is filtered at 25~30 DEG C of room temperature；
(4) filtering products therefrom is dried, control drying temperature is dried 3-5 hours, institute in the range of 50~65 DEG C
Product is obtained relative to the glass dust weightening about 45~50% before cladding, the glass dust particulate for being coated with silica sol layer is produced.
Wherein described soluble silicate for example can be sodium metasilicate, asbestos（CaMg3Si4O12）, feldspar
（K2Al2Si6O16）, clay（Al2(OH)4Si2O5）Deng the compound containing silicon, oxygen and other metallic elements.
Compared with prior art, beneficial effects of the present invention are as follows：
The present invention is by the way that in glass dust outer cladding silica sol layer, obtained glass dust product, which is used for solar cell, to be prolonged
The softening and fusing of slow glass dust, reduce corrosivity of the glass powder to silicon chip, and then reduce the destruction to passivation layer.
Certainly, any product for implementing the present invention it is not absolutely required to while reaching all the above advantage.
Embodiment
Herein, the scope represented by " numerical value to another numerical value ", is that one kind avoids enumerating in the description
The summary representation of all numerical value in the scope.Therefore, the record of a certain special value scope, covers the number range
The relatively fractional value scope that interior any number and any number in the number range is defined, as bright in the description
Text writes out any number as should be compared with fractional value scope.
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate this hair
It is bright, rather than limit protection scope of the present invention.Technical staff makes according to the present invention in actual applications improvement and tune
It is whole, still fall within protection scope of the present invention.
Embodiment 1
A kind of preparation method for glass dust for rear surface of solar cell electrode slurry that the present embodiment is provided is specific such as
Under：
1. adding ethanol, sodium sulphate etc. in the weak solution of 40% sodium metasilicate, by adjusting Na ion concentration, further adjust
The content of silica in the viscosity of solution, regulation solution is saved 18%；
2. adding glass dust in system obtained by above-mentioned steps (1), compare glass dust according to weight:Silica=2:5
Ratio is allocated；
3. by system obtained by above-mentioned steps (2) at 25~30 DEG C of room temperature after stirring 5 hours, filtering；
4. filtering products therefrom is dried, control drying temperature is in the range of 50~65 DEG C, drying 3 hours, relatively
In the glass dust weightening about 50% before cladding；Produce the glass dust particulate for being coated with silica sol layer.
Performance test：
Dsc analysis is carried out to the glass dust before and after cladding, dsc analysis result is shown：The present embodiment has coated Ludox
Glass dust softening temperature compared with uncoated glass dust substantially it is delayed about 35 DEG C, reached the present invention expection set
Meter：The softening temperature of glass dust is delayed by coating Ludox, so as to reduce corruption of the glass powder to solar silicon wafers
The erosion time, corrosiveness is reduced, and then reduce the destruction to passivation layer.
The concrete case that the novel glass powder coated using the Ludox of the present embodiment makes solar energy back of the body silver is as follows：
Ethyl cellulose is dissolved in terpinol, dissolving clarification, the adhesive for giving over to slurry is used；
Take 40-60 parts of silver powder, above-mentioned adhesive 25-35 parts, 1-8 parts of the glass dust coated with Ludox, co-formulation into
Crude product slurry, upper three-roller carries out 3 grades and handles to obtain finished product slurry；
By the slurry of above-mentioned preparation, by the way that thin grid line is screen-printed on silicon electrode, then pass through conventional sintering process
Agglomeration, obtain can test solar power silicon electrode slice.
Solar power silicon electrode slice after the slurry printing made to the novel glass powder coated with Ludox has carried out following
Test, and with conventional glass frit make slurry contrasted.
Silicon electrode, and the silicon electrode made with the glass dust before cladding are made using the glass dust after the cladding of the present embodiment
Carry out the test of performance and compare, the performance test results such as table 1 below.
Table 1
As can be seen from Table 1, the silicon electrode performance that the glass dust after the cladding of the present embodiment improves makes is better than not carrying out
The silicon electrode that the glass dust of cladding makes, cell performance lifting, the electricity conversion of unit area is improved.
Embodiment 2
A kind of preparation method for glass dust for rear surface of solar cell electrode slurry that the present embodiment is provided is specific such as
Under：
1. adding ethanol, sodium sulphate etc. in the weak solution of 20% sodium metasilicate, by adjusting Na ion concentration, further adjust
The content of silica in the viscosity of solution, regulation solution is saved 10%；
2. adding glass dust in system obtained by above-mentioned steps (1), compare glass dust according to weight:Silica=3:3
Ratio is allocated；
3. by system obtained by above-mentioned steps (2) at 25~30 DEG C of room temperature after stirring 8 hours, filtering；
4. filtering products therefrom is dried, control drying temperature is in the range of 50~65 DEG C, drying 5 hours, relatively
In the glass dust weightening about 45% before cladding；Produce the glass dust particulate for being coated with silica sol layer.
The present invention and above-described embodiment are by the way that in glass dust outer cladding silica sol layer, obtained glass dust product is used for the sun
Can battery can delay the softening and fusing of glass dust, reduce corrosivity of the glass powder to silicon chip, and then reduce pair
The destruction of passivation layer.
Under the teaching of the present invention and above-described embodiment, those skilled in the art are easy to it is envisioned that the present invention is cited
Or each raw material or its equivalent alterations, each processing method or its equivalent alterations enumerated can realize the present invention, and each original
The parameter bound value of material and processing method, interval value can realize the present invention, embodiment numerous to list herein.
Claims (3)
1. a kind of glass dust for rear surface of solar cell electrode slurry, it is characterised in that the glass dust is coated with low
Fusing point, volatilizable silica sol layer；
The glass dust is prepared by the method comprised the following steps：
(1) ethanol, sodium sulphate are added in 20~40wt% soluble silicate weak solution to adjust the viscosity of solution, are adjusted
The content of silica is in 10-18% in solution；
(2) glass dust is added in system obtained by above-mentioned steps (1), is glass dust according to weight ratio：Silica=2~3：3~
5 ratio allotment；
(3) system obtained by above-mentioned steps (2) after stirring 5-8 hour, is filtered at 25~30 DEG C of room temperature；
(4) filtering products therefrom is dried, control drying temperature is dried 3-5 hours in the range of 50~65 DEG C, dries institute
Product is obtained relative to the glass dust weightening 45~50% before cladding, the glass dust particulate for being coated with the silica sol layer is produced.
2. a kind of preparation method of the glass dust for rear surface of solar cell electrode slurry described in claim 1, its feature
It is, comprises the following steps：
(1) ethanol, sodium sulphate are added in 20~40wt% soluble silicate weak solution to adjust the viscosity of solution, are adjusted
The content of silica is in 10-18% in solution；
(2) glass dust is added in system obtained by above-mentioned steps (1), is glass dust according to weight ratio：Silica=2~3：3~
5 ratio allotment；
(3) system obtained by above-mentioned steps (2) after stirring 5-8 hour, is filtered at 25~30 DEG C of room temperature；
(4) filtering products therefrom is dried, control drying temperature is dried 3-5 hours in the range of 50~65 DEG C, dries institute
Product is obtained relative to the glass dust weightening 45~50% before cladding, the glass dust particulate for being coated with silica sol layer is produced.
3. the preparation method of the glass dust according to claim 2 for rear surface of solar cell electrode slurry, its feature
It is, the soluble silicate is sodium metasilicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016300.XA CN105621896B (en) | 2015-12-30 | 2015-12-30 | Glass dust for rear surface of solar cell electrode slurry and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016300.XA CN105621896B (en) | 2015-12-30 | 2015-12-30 | Glass dust for rear surface of solar cell electrode slurry and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105621896A CN105621896A (en) | 2016-06-01 |
| CN105621896B true CN105621896B (en) | 2017-10-31 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63282131A (en) * | 1987-05-11 | 1988-11-18 | Mitsubishi Electric Corp | Production of whisker-reinforced glass |
| CN1101027A (en) * | 1993-09-29 | 1995-04-05 | 中国建筑材料科学研究院 | Technology for production of fiber reinforced glass and glass-ceramic base composite material |
| CN101861361A (en) * | 2007-10-04 | 2010-10-13 | 中村宪司 | Glass-containing molding composition and process for production of the same |
| CN103146301A (en) * | 2011-12-06 | 2013-06-12 | 中国科学院上海硅酸盐研究所 | Skutterudite based thermoelectric material, thermal protection coating for devices and preparation method thereof |
-
2015
- 2015-12-30 CN CN201511016300.XA patent/CN105621896B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63282131A (en) * | 1987-05-11 | 1988-11-18 | Mitsubishi Electric Corp | Production of whisker-reinforced glass |
| CN1101027A (en) * | 1993-09-29 | 1995-04-05 | 中国建筑材料科学研究院 | Technology for production of fiber reinforced glass and glass-ceramic base composite material |
| CN101861361A (en) * | 2007-10-04 | 2010-10-13 | 中村宪司 | Glass-containing molding composition and process for production of the same |
| CN103146301A (en) * | 2011-12-06 | 2013-06-12 | 中国科学院上海硅酸盐研究所 | Skutterudite based thermoelectric material, thermal protection coating for devices and preparation method thereof |
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|---|---|
| CN105621896A (en) | 2016-06-01 |
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