CN103871541B - Electrocondution slurry for back electrode of solar battery - Google Patents
Electrocondution slurry for back electrode of solar battery Download PDFInfo
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- CN103871541B CN103871541B CN201310518105.1A CN201310518105A CN103871541B CN 103871541 B CN103871541 B CN 103871541B CN 201310518105 A CN201310518105 A CN 201310518105A CN 103871541 B CN103871541 B CN 103871541B
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- electrocondution slurry
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Abstract
The invention discloses electrocondution slurry for a back electrode of a solar battery. The electrocondution slurry consists of the following materials according to mass percentage composition: 30-40 % of silver powder, 25 % of zinciferous complexing agent, 1-2 % of unleaded glass dust, and 44-50 % of organic binding phase, wherein the grain diameter of the silver powder is 0.5-1 micron; the zinciferous complexing agent is a mixture which is formed by zinc powder with the grain diameter of 0.5-4 microns and zinc stearate according to a part by weight proportion of 4:0.1-1; the organic binding phase is organic cementation which is formed by dissolving ethyl cellulose into a mixed solvent which is formed by butyl carbitol acetic ester and terpineol; the part by weight proportion of the ethyl cellulose, the butyl carbitol acetic ester and the terpineol is 1:5:4. According to the electrocondution slurry for the back electrode of the solar battery, the existing technical feature is kept, the cost of the electrocondution slurry is greatly reduced, and the competitive power of the amorphous silicon solar battery is thus promoted.
Description
Technical field
The present invention relates to back electrode electrocondution slurry in a kind of solar cell, belongs to technical field of solar batteries.
Background technology
In the market back silver paste silver content used is typically more than 60%, and silver content is higher, gives cell piece manufacturing enterprise
Bring huge cost pressure.It is a thinking for important reduces cost to replace part or all of silver with base metal, but these are low-priced
Metal cannot simultaneously have silver-colored easy-sintering, hardly possible oxidation, difficult diffusion, high connductivity and the advantage easily welded.Therefore, how to ensure to reduce
While silver content, existing properties of product are kept to become the direction of those of ordinary skill in the art's effort.
The content of the invention
The present invention provides back electrode electrocondution slurry in a kind of solar cell, and this electrocondution slurry maintains prior art
Simultaneously electrocondution slurry cost can be greatly reduced, so as to improve silicon wafer solar cell competitiveness.
To reach above-mentioned purpose, the technical solution used in the present invention is：Back electrode conductive paste in a kind of solar cell
Material, the electrocondution slurry is made up of the material of following masses percentage composition：
Silver powder 30%,
Complexing agent containing zinc 25%,
Lead-free glass powder 1%,
Organic adhesive phase 44%；
0.5 ~ 1 μm of the silver powder particle diameter；
The complexing agent containing zinc is the zinc powder of 0.5 ~ 4 μm of zinc stearate and particle diameter according to 0.1 ~ 1：4 weight ratios are formed
Mixture；
It is molten that the organic adhesive is dissolved in the mixing being made up of butyl carbitol acetate and terpineol for ethyl cellulose
The organic adhesive that agent is formed, the ethyl cellulose, butyl carbitol acetate, terpineol weight ratio are 1：5：4.
Further improved technical scheme in above-mentioned technical proposal is as follows：
1st, in such scheme, after the electrocondution slurry stirs in homogenizer, grind in Jing three-roll grinders,
Form the electrocondution slurry that 10 μm of grain fineness is following, viscosity is 80 ~ 100Pas.
2nd, in such scheme, the zinc powder is at least one in spherical, flakey, ball zinc flake.
3rd, in such scheme, the tap density >=3g/cm of the zinc powder3。
4th, in such scheme, the organic adhesive is formed in 70 DEG C of stirring in water bath.
Because above-mentioned technical proposal is used, the present invention has compared with prior art following advantages and effect：
Electrocondution slurry of the present invention maintains prior art performance simultaneously, greatly reduces electrocondution slurry cost, so as to be lifted
Silicon wafer solar cell competitiveness, while silver content is reduced, electrical property and welding pulling force are showed well；Secondly,
The mixing complexing agent containing zinc that the complexing agent containing zinc of certain content component is formed for the zinc powder and organic zinc of 0.5 ~ 4 μm of particle diameter, favorably
In improving existing product performance in terms of electrical property, it is ensured that the silver-colored average efficiency of the present invention back of the body more than 17%, this and current main flow
Rate of product transformation maintains an equal level；Welding performance aspect can also pass through the standard of the 3N in industry.
Specific embodiment
With reference to embodiment, the invention will be further described：
Embodiment：A kind of back electrode electrocondution slurry in solar cell, the electrocondution slurry is contained by following masses percentage
The material composition of amount：
Silver powder 30%,
Complexing agent containing zinc 25%,
Lead-free glass powder 1%,
Organic adhesive phase 44%；
0.5 μm of the silver powder particle diameter；
The complexing agent containing zinc is the zinc powder and zinc stearate of 0.5 ~ 4 μm of particle diameter according to 4：0.1 ~ 1 weight ratio is formed
Mixture；
It is molten that the organic adhesive is dissolved in the mixing being made up of butyl carbitol acetate and terpineol for ethyl cellulose
The organic adhesive that agent is formed, the ethyl cellulose, butyl carbitol acetate, terpineol weight ratio are 1：5：4.
It is 0.5 μm that the complexing agent containing zinc is particle diameter, and zinc powder and zinc stearate ratio are 4：0.1；
After above-mentioned electrocondution slurry stirs in homogenizer, grind in Jing three-roll grinders, form grain fineness
Less than 10 μm, the electrocondution slurry that viscosity is 80 ~ 100Pas.
Above-mentioned zinc powder is ball zinc flake.
Tap density >=the 3g/cm of above-mentioned zinc powder3。
Above-mentioned organic adhesive is formed in 70 DEG C of stirring in water bath.
Above-described embodiment technology design only to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.It is all according to the present invention
Equivalence changes or modification that Spirit Essence is made, all should be included within the scope of the present invention.
Claims (5)
1. back electrode electrocondution slurry in a kind of solar cell, it is characterised in that：The electrocondution slurry is by following masses percentage
The material composition of content：
Silver powder 30%,
Complexing agent containing zinc 25%,
Lead-free glass powder 1%,
Organic adhesive phase 44%；
0.5 ~ 1 μm of the silver powder particle diameter；
The complexing agent containing zinc is the zinc powder of 0.5 ~ 4 μm of zinc stearate and particle diameter according to 0.1 ~ 1：It is mixed that 4 weight ratios are formed
Compound；
The organic adhesive is dissolved in the mixed solvent institute being made up of butyl carbitol acetate and terpineol for ethyl cellulose
The organic adhesive of formation, the ethyl cellulose, butyl carbitol acetate, terpineol weight ratio are 1：5：4.
2. electrocondution slurry according to claim 1, it is characterised in that：The electrocondution slurry is stirred in homogenizer
After even, in Jing three-roll grinders grind, is formed below 10 μm of grain fineness, viscosity be 80 ~ 100Pas electrocondution slurry.
3. electrocondution slurry according to claim 1, it is characterised in that：The zinc powder is spherical, flakey, ball zinc flake
In at least one.
4. electrocondution slurry according to claim 1, it is characterised in that：Tap density >=the 3g/cm of the zinc powder3。
5. electrocondution slurry according to claim 1, it is characterised in that：The organic adhesive is in 70 DEG C of stirring in water bath shapes
Into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310518105.1A CN103871541B (en) | 2012-05-03 | 2012-05-03 | Electrocondution slurry for back electrode of solar battery |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210133348.9A CN102693771B (en) | 2012-05-03 | 2012-05-03 | Conductive paste for back electrode in crystalline silicon solar cell |
| CN201310518105.1A CN103871541B (en) | 2012-05-03 | 2012-05-03 | Electrocondution slurry for back electrode of solar battery |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210133348.9A Division CN102693771B (en) | 2012-05-03 | 2012-05-03 | Conductive paste for back electrode in crystalline silicon solar cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103871541A CN103871541A (en) | 2014-06-18 |
| CN103871541B true CN103871541B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310518105.1A Active CN103871541B (en) | 2012-05-03 | 2012-05-03 | Electrocondution slurry for back electrode of solar battery |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106653144A (en) * | 2016-11-30 | 2017-05-10 | 无锡优顺能源开发科技有限公司 | Conductive slurry for back electrode of solar cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295739A (en) * | 2007-04-26 | 2008-10-29 | 比亚迪股份有限公司 | Conductive slurry for solar battery front side electrode and production method thereof |
| WO2009052356A2 (en) * | 2007-10-18 | 2009-04-23 | E. I. Du Pont De Nemours And Company | Conductive compositions and processes for use in the manufacture of semiconductor devices |
| CN101887764A (en) * | 2010-06-28 | 2010-11-17 | 彩虹集团公司 | Method for preparing silicon-based solar front silver paste |
| CN102024856A (en) * | 2010-09-28 | 2011-04-20 | 彩虹集团公司 | Environment-friendly crystalline silicon solar-cell back surface field silver-aluminium paste and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157219B (en) * | 2011-01-12 | 2012-06-27 | 西安银泰新能源材料科技有限公司 | Silver paste for positive electrode of crystalline silicon solar cell and preparation method thereof |
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- 2012-05-03 CN CN201310518105.1A patent/CN103871541B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295739A (en) * | 2007-04-26 | 2008-10-29 | 比亚迪股份有限公司 | Conductive slurry for solar battery front side electrode and production method thereof |
| WO2009052356A2 (en) * | 2007-10-18 | 2009-04-23 | E. I. Du Pont De Nemours And Company | Conductive compositions and processes for use in the manufacture of semiconductor devices |
| CN101887764A (en) * | 2010-06-28 | 2010-11-17 | 彩虹集团公司 | Method for preparing silicon-based solar front silver paste |
| CN102024856A (en) * | 2010-09-28 | 2011-04-20 | 彩虹集团公司 | Environment-friendly crystalline silicon solar-cell back surface field silver-aluminium paste and preparation method thereof |
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| CN103871541A (en) | 2014-06-18 |
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Address after: 215000 100 Zhenbei Road, Tongan town, high tech Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou Jingyin New Material Technology Co.,Ltd. Address before: 215011 north side of 2nd floor, building 2, No.189, Kunlunshan Road, high tech Zone, Suzhou, Jiangsu Province Patentee before: SUZHOU ISILVER MATERIALS Co.,Ltd. |
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