CN103725092A - Organic binder for silver paste for back electrode of crystalline silicon photovoltaic cell and preparation method of organic binder - Google Patents
Organic binder for silver paste for back electrode of crystalline silicon photovoltaic cell and preparation method of organic binder Download PDFInfo
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- CN103725092A CN103725092A CN201310486554.2A CN201310486554A CN103725092A CN 103725092 A CN103725092 A CN 103725092A CN 201310486554 A CN201310486554 A CN 201310486554A CN 103725092 A CN103725092 A CN 103725092A
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- organic binder
- diethylene glycol
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- monobutyl ether
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Abstract
The invention relates to an organic binder for silver paste for a back electrode of a crystalline silicon photovoltaic cell and a preparation method of the organic binder. The organic binder comprises components in percentage by mass as follows: 1%-10% of ethyl cellulose, 1%-5% of cellulose acetate butyrate, 50%-70% of diethylene glycol butylether acetate, 10%-40% of butyl carbitol, 1%-5% of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.1%-0.5% of castor oil derivatives and 0.1%-3% of tallow propylene diamine olein. The preparation method is as follows: butyl carbitol, diethylene glycol butylether acetate, ethyl cellulose, cellulose acetate butyrate, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and hydrogenated castor oil derivatives are mixed uniformly, stirred evenly, cooled and filtered, and the organic binder is obtained. The back silver paste which is prepared from the organic binder and used for crystalline silicon photovoltaic cell has a good sedimentation resistance effect, good liquidity and excellent silk-screen printing performance.
Description
Technical field
The invention belongs to the sub-slurry of crystal silicon photovoltaic battery field, be specifically related to organic binder bond and preparation method thereof for a kind of crystal silicon photovoltaic cell backside electrode silver plasm
Background technology
Crystal silicon photovoltaic battery is a kind ofly solar energy converting can be become to the semiconducter device of electric energy, and under illumination condition, inside solar energy battery can produce photogenerated current, by electrode, electric energy can be exported.In forming the manufacturing processed of solar cell, crystal silicon photovoltaic battery aluminium paste is aluminium back surface field at area of solar cell Main Function.Aluminium paste is conventionally screen printed in the back side of silicon chip and is dried, and has been dried rear this silicon chip to be carried out to sintering, forms Al-Si melt.Crystal silicon body photovoltaic cell back of the body silver slurry is mainly by silver powder, glass powder, and organic binder bond forms, and its preparation technology, for silver powder, glass powder are scattered in organic binder bond, forms the paste body shape slurry of stable uniform.Organic carrier Main Function is energy storage, to silver slurry stability, it fastens effect to the performance of organic carrier, if organic carrier preparation is bad, affects slurry energy storage anti-settling, silk screen printing characteristic etc., even to the compactness of rete after battery efficiency and sintering etc., cause welding pulling force to reduce;
Application publication number CN102136308A, its invention relates to a kind of front electrode of solar battery and grid line conductive silver paste is used organic carrier and preparation method thereof and contained the silver paste of this organic carrier and the solar cell of manufacturing containing this silver paste.The disclosed organic carrier of this patent is mainly applicable to highly filled, full-bodied positive silver paste, back silver paste for low viscosity low solid content is not suitable for, and slurry adopts the adjacent benzene class of dibutyl phthalate softening agent, deviate from mutually with current carrier development environment-friendly type slurry.
Application publication number CN102592709A, its invention relates to organic carrier and preparation method thereof and the conductive silver paste that contains this organic carrier for a kind of solar cell conductive silver paste, in this silver slurry, organic carrier be take the Terpineol 350 system that Terpineol 350 is primary solvent, this system slurry is easily dry, in use easily cause network blocking version phenomenon, and slurry adopts adjacent benzene class softening agent, toxicity is larger, slurry is produced and operative employee's health of use is harmful to, its not compound ROSH environmental protection instruction.
The research > > of paper < < novel environment friendly solar cell size organic carrier, author Ma Yahong has done toxicity research to adjacent phenyl ester class, article is pointed out: in solar cell size, adjacent benzene vinegar class does not have and the contour molecule carbon chain polymerization of Mierocrystalline cellulose, therefore As time goes on can constantly discharge, entered environment and organism are caused potential harm.The adjacent Ben Culeishi World Health Organization (WHO) is that announce, that must tighten control in nineteen ninety-five, a class upsets endocrine chemical substance, and oneself causes global environmental pollution.Priority pollutants is listed in by Environmental Protection Agency (EPA).In daily life people by all means (water, food, air etc.) contact the cruel class chemical substance of adjacent benzene.Visible, in solar cell size organic carrier, the use of the cruel class of adjacent benzene, not only can cause the pollution of environment, and can jeopardize the healthy of direct or indirect exposed population group.
Summary of the invention
For the deficiencies in the prior art, the present invention aims to provide organic binder bond and preparation method thereof for a kind of crystal silicon photovoltaic cell backside electrode silver plasm, can be so that slurry anti-settling performance be high, and dispersing property is good, crosses net ability strong.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A crystal silicon photovoltaic cell backside electrode silver plasm organic binder bond, its component and component concentration
As follows according to mass percent meter, and the quality percentage composition sum of each component is 100%:
Its preferred component and component concentration are as follows according to mass percent meter, and the quality percentage composition sum of each component is 100%:
Described hydrogenated castor oil derivative is preferably the product that the model of Su Wei Rhodia is ACT-CT.
Described hydrogenated castor oil derivative is preferably the tallow Pn olein TDO that Akzo Nobel N.V. produces.
The preparation method of organic binder bond for described crystal silicon photovoltaic cell backside electrode silver plasm, according to above-mentioned mass percent, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethyl cellulose, cellulose acetate butyrate, castor oil derivative are mixed, be heated to 80 ℃-90 ℃, isothermal reaction 1.5-2.5 hour, adds tallow Pn olein after dissolving completely, stirs, after being cooled to room temperature, filter, obtain organic binder bond.
Organic binder bond difference from prior art of the present invention is, this organic binder bond, as a kind of composition, acts synergistically between each component, reaches technique effect of the present invention, and this organic binder bond is containing adjacent benzene class, bromine class organic solvent, safety and environmental protection.This organic binder bond be take diethylene glycol monobutyl ether acetic ester as main carrier system, diethylene glycol monobutyl ether acetic ester oneself viscosity is low, good to powder wettability, slurry dispersing property is good, and the high volatilization of boiling point is slow, unsuitable network blocking version in the follow-up use procedure of slurry, add modified castor oil derivative and tallow Pn olein simultaneously, make slurry anti-settling performance high, dispersing property is good, crosses net ability strong.
Compared with prior art, of the present invention have a following advantage:
1. organic binder bond environmental protection,, containing adjacent benzene class, bromine etc., does not meet ROSH environmental protection command request;
2. add cellulose acetate butyrate, improved the time of drying of silverskin and the hardness of rete;
3. adopt hydrogenated castor oil derivative as thixotropic agent, produced beyond thought technique effect, anti-settling performance for example, than other thixotropic agent (hydrogenated castor oil) successful;
4. adopt tallow Pn olein as hyper-dispersant, produced beyond thought technique effect, other class of hyper-dispersant department 85, Yelkin TTS can not reach technique effect of the present invention, and it has improved the net ability of crossing of slurry greatly.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
1, the preparation of organic binder bond:
Diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, Lauryl Alcohol ester, ethyl cellulose, cellulose acetate butyrate, castor oil derivative are put in stainless steel cauldron, rotating speed 30RPM, be heated rapidly to 90 degree, isothermal reaction 2 hours, after dissolving completely, adds in polymkeric substance tallow Pn olein, stir, be cooled to after room temperature filter, discharging warehouse-in; The product that the model of described hydrogenated castor oil derivative Wei Suwei Rhodia is ACT-CT.Described hydrogenated castor oil derivative is the tallow Pn olein TDO that Akzo Nobel N.V. produces.
Table 1, the application's organic binder bond recipe ratio table W%
Table 2 contrast experiment data
2, back silver slurry preparation
By silver powder, glass powder, organic binder bond etc., put into double-planet stirrer for mixing even, with three-roll grinder, disperse, then after vacuum defoamation, obtain viscosity at 60 ± 10Pa.s silver paste.
Table 3 silver slurry formula table W%
From table 3 data, 1-4,6,7 silver medal slurry samples, have added the slurry of acetate butyrate fiber, and after drying, film hardness is firmly high; No. 5 silver-colored slurry samples, have not added the slurry of acetate butyrate fiber, and after drying, film hardness is low, easily scratches; No. 6 sample replaces ACT-CT with hydrogenated castor oil, and anti-settling performance decreases, and No. 7 samples replace the slurry of TDO with this Pan 85, and the effect that dispersing property, printing performance are also done dispersion agent than TDO declines to some extent.
Above embodiment is described embodiments of the present invention, but these embodiments are only for exemplary purposes rather than limit the present invention.Those skilled in the art can change and revise for embodiment not deviating under the prerequisite of scope and spirit of the present invention, and all belong to the present invention and disclose down the equivalence invention design completing, and within should dropping on protection scope of the present invention.
Claims (3)
1. a crystal silicon photovoltaic cell backside electrode silver plasm organic binder bond, is characterized in that, its component and component concentration are as follows according to mass percent meter, and the quality percentage composition sum of each component is 100%:
Ethyl cellulose 1%-10%
Cellulose acetate butyrate 1%-5%
Diethylene glycol monobutyl ether acetic ester 50%-70%
Diethylene glycol monobutyl ether 10%-40%
Lauryl Alcohol ester 0.1%-5%
Castor oil derivative 0.1%-0.5%
Tallow Pn olein 0.1%-3%.
2. crystal silicon photovoltaic cell backside electrode silver plasm organic binder bond according to claim 1, is characterized in that, its component and component concentration are as follows according to mass percent meter, and the quality percentage composition sum of each component is 100%:
Ethyl cellulose 5%-10%
Cellulose acetate butyrate 2%-4%
Diethylene glycol monobutyl ether acetic ester 50%-70%
Diethylene glycol monobutyl ether 12%-36%
Lauryl Alcohol ester 3%-5%
Castor oil derivative 0.3%-0.5%
Tallow Pn olein 0.1%-1%.
3. the preparation method of organic binder bond for crystal silicon photovoltaic cell backside electrode silver plasm described in claim 1 or 2, it is characterized in that, according to mass percent described in claim 1, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetic ester, ethyl cellulose, cellulose acetate butyrate, hydrogenated castor oil derivative are mixed, be heated to 80 ℃-90 ℃, isothermal reaction 1.5-2.5 hour, after dissolving completely, add tallow Pn olein, stir, filter after being cooled to room temperature, obtain organic binder bond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310486554.2A CN103725092B (en) | 2013-10-17 | 2013-10-17 | Organic binder for silver paste for back electrode of crystalline silicon photovoltaic cell and preparation method of organic binder |
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| CN201310486554.2A CN103725092B (en) | 2013-10-17 | 2013-10-17 | Organic binder for silver paste for back electrode of crystalline silicon photovoltaic cell and preparation method of organic binder |
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| CN103725092A true CN103725092A (en) | 2014-04-16 |
| CN103725092B CN103725092B (en) | 2015-04-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007092020A1 (en) * | 2006-02-10 | 2007-08-16 | Stepan Company | Fabric conditioning active compositions |
| CN101685736A (en) * | 2008-09-28 | 2010-03-31 | 四川虹欧显示器件有限公司 | Transparent dielectric paste |
| CN101728001A (en) * | 2009-11-12 | 2010-06-09 | 东南大学 | Lead-free and low-silver photosensitive silver paste and preparation method thereof |
| JP2011079793A (en) * | 2009-10-09 | 2011-04-21 | Nippon Kayaku Co Ltd | Diolefin compound, epoxy resin, curable resin composition, and cured product thereof |
| CN102364583A (en) * | 2011-09-30 | 2012-02-29 | 宁波广博纳米新材料股份有限公司 | Silver paste for back face of lead-free crystal silicon solar cell and preparation method thereof |
-
2013
- 2013-10-17 CN CN201310486554.2A patent/CN103725092B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007092020A1 (en) * | 2006-02-10 | 2007-08-16 | Stepan Company | Fabric conditioning active compositions |
| CN101685736A (en) * | 2008-09-28 | 2010-03-31 | 四川虹欧显示器件有限公司 | Transparent dielectric paste |
| JP2011079793A (en) * | 2009-10-09 | 2011-04-21 | Nippon Kayaku Co Ltd | Diolefin compound, epoxy resin, curable resin composition, and cured product thereof |
| CN101728001A (en) * | 2009-11-12 | 2010-06-09 | 东南大学 | Lead-free and low-silver photosensitive silver paste and preparation method thereof |
| CN102364583A (en) * | 2011-09-30 | 2012-02-29 | 宁波广博纳米新材料股份有限公司 | Silver paste for back face of lead-free crystal silicon solar cell and preparation method thereof |
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