CN109903886A - It is a kind of applied to the thin grid slurry in front without net netting version - Google Patents
It is a kind of applied to the thin grid slurry in front without net netting version Download PDFInfo
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- CN109903886A CN109903886A CN201910041966.2A CN201910041966A CN109903886A CN 109903886 A CN109903886 A CN 109903886A CN 201910041966 A CN201910041966 A CN 201910041966A CN 109903886 A CN109903886 A CN 109903886A
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Abstract
The invention discloses a kind of applied to the thin grid slurry in front without net netting version, and the composition of the thin grid slurry includes: the silver powder of 85-90%, the glass powder of 1-4%, the organic carrier of 7-12% and micro inorganic additive and organic additive.Wherein glass powder is double glass powder systems, and wherein organic carrier includes ethyl cellulose resin, acetylbutyrylcellulose resin and other functional resins and solvent, thixotropic agent, organosilicon, auxiliary agent etc..Organic carrier of the present invention focuses on the selection method of solvent, and dissolubility and intermolecular interaction between solvent and resin and thixotropic agent, enable slurry in 24-28um line width without smooth printing in net netting version by the collocation between reasonable organic component, and line style full weight and planarization and depth-width ratio are all very good, this is conducive to the fill factor and short circuit current that improve solar battery, to improve transformation efficiency.
Description
Technical field
The invention belongs to the thin grid silver paste slurries of technical field of solar batteries, in particular to a kind of front used for solar batteries
Material particularly relates to a kind of applied to the thin grid slurry in front without net netting version.
Background technique
In current crystal silicon solar battery secondary printing technique, there are problems that main grid paste and thin grid slurry matching, i.e.,
The collocation of the thin grid slurry of the main grid paste of different glass system and different glass system there are efficiency is relatively low or the relatively low problem of pulling force,
This is difficult to realize part using cost efficiency purpose of secondary printing cell piece factory, thus be badly in need of developing a kind of good compatibility and
The thin grid slurry of process window mouth width.
In photovoltaic industry, silk-screen printing technique is used extensively since technology maturation, simple process and precision are easy to control
In the front electrode for forming solar cell.In recent years, the efficiency of solar cell of common process, which is further promoted, becomes further difficult.
Ultra-fine grid solar cell technology can reduce shading loss, advanced optimize the depth-width ratio of secondary grid line, in existing equipment and
Improved efficiency and cost can be fast implemented on the basis of technique to be reduced, thus is widely noticed.However as the drop of secondary grid line opening
It is low, due to the intrinsic defect of traditional grenadine halftone (oblique stretching), net knot to block drawback more obvious, certainly will will affect ultra-fine
The trend that grid printing and secondary grid line opening are further narrow as, so photovoltaic industry is further strong for the demand without net netting version.
Conventional face silver paste is on the high side without the generally existing disconnected grid of printing in net netting version or that depth-width ratio is small is equal scarce at present
Point seriously hinders the promotion of crystal silicon solar batteries efficiency, so developing the thin grid slurry in front adapted to without net netting version
Expect extremely urgent.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of applied to the thin grid in front without net netting version
Slurry.The program improves the compatibility issue of thin grid slurry Yu different glass system main grid paste, while improving slurry in no net
Printing performance in version of knotting improves the depth-width ratio of slurry and reduces disconnected grid, to improve the photoelectric conversion effect of solar battery
Rate.
To achieve the above object, the technical scheme is that the thin grid slurry in the front is grouped by the group of following parts by weight
At: silver powder 80-90%, glass powder 1-3%, organic carrier 6-10% and organic and inorganic assistant surplus, the organic carrier
It include solvent, auxiliary agent, resin and thixotropic agent, the selection gist of solvent is to without net netting version in the organic carrier
Wellability is good, while to the solvent of silicon wafer wellability difference, then the compatibility performance between resin and thixotropic agent and solvent being selected to reach
To best, keep the intermolecular interaction between organic carrier each component maximum.
Further setting is the glass powder using double glass powder systems, and one kind is high pbo glass, and another kind is unleaded glass
Glass.It can be arranged in pairs or groups with the main grid paste of different glass powder system using high lead and unleaded double glass systems, good compatibility uses window
Mouth range is wide.
Further setting be the solvent occupy hundred parts of airborne weight than be 60-80%, organic solvent be selected from terpinol,
Alcohol ester 12,1- phenoxy group -2- propyl alcohol, DBE, dimethyl adipate, dimethyl glutarate, repefral, diethyl
Glycol monobutyl ether acetate, tributyl citrate, dibutyl ethylene glycol ether, diethylene glycol monobutyl ether, in triethylene glycol monomethyl ether
It is one or more of.
Further setting is that the auxiliary agent occupies airborne weight percentage for 10-20%, and auxiliary agent includes dispersing agent, table
Face activating agent, organo-silicic oil and defoaming agent.
Further setting is that the resin occupies airborne weight percentage for 1-15%, and resin is selected from ethyl cellulose,
Acrylic resin, rosin resin, acetylbutyrylcellulose, cellulose acetate propionate, polyvinyl butyral, thermoplastic resin and
One or more of polyvinylpyrrolidone.
Further setting be the thixotropic agent occupy airborne weight percentage be 1-8%, thixotropic agent be selected from polyamide sodium,
It is one or more of in rilanit special, fumed silica.
Further setting is that the thin grid slurry in the front adapts to tie screen printing process without net.
Compared with prior art, beneficial effects of the present invention are as follows:
The thin grid slurry of the present invention solves thin grid slurry and the main grid paste of different glass system is simultaneous using double glass systems
Capacitive problem, that has widened thin grid slurry uses window, so that the efficiency of solar battery reaches best with pulling force.
The present invention develops the selecting method of unique solvent, resin and thixotropic agent simultaneously, by different in organic carrier
The reasonably combined of ingredient enables positive thin grid slurry in 24-28um line width without smooth printing in net netting version, so that burning
Tie lines width is 32-40um, is highly 16-20um, depth-width ratio improves the efficiency of cell piece between 0.42-0.55.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment to the present invention make into
One step it is described in detail.
Embodiment 1-7: a kind of double glass system parts by weight ratio of components of the thin grid slurry in front:
Embodiment 1-7 glass and silver powder and organic carrier are stirred evenly and are prepared into thin grid slurry, then respectively with it is unleaded
With the main grid paste collocation for the glass system for having lead, testing efficiency and pulling force.Shown in test result is as follows: wherein main grid paste
Glass powder is lead-free systems:
| Sample | Ncell% | Voc(mv) | Isc(A) | FF% | Rs(mΩ) | Pulling force (N) |
| 1 | 19.11 | 638.2 | 9.216 | 80.12 | 1.73 | 1.32 |
| 2 | 19.15 | 638.3 | 9.220 | 80.23 | 1.68 | 1.63 |
| 3 | 19.18 | 638.6 | 9.221 | 80.29 | 1.62 | 1.85 |
| 4 | 18.92 | 637.0 | 9.205 | 79.81 | 1.92 | 1.10 |
| 5 | 18.99 | 637.6 | 9.216 | 79.93 | 1.88 | 1.22 |
| 6 | 19.03 | 637.5 | 9.223 | 79.97 | 1.85 | 1.43 |
| 7 | 19.08 | 638.0 | 9.218 | 80.05 | 1.76 | 1.90 |
Wherein the glass powder of main grid paste is to have lead system:
From above-mentioned data it is found that embodiment 3 and main grid paste collocation behind efficiency that is unleaded or having lead glass system and pulling force
Reach optimum value.
The present invention is adapted to be further described without the organic carrier of net netting version below with reference to embodiment:
Firstly, selection solvent: solvent is selected first to preferable while poor to silicon wafer wellability without net netting version wellability
Solvent, such as butyl acetate, alcohol ester 12, diethylene glycol monobutyl ether, dimethyl adipate, phthalic acid two
Methyl esters etc..Then, selection and the preferable resin of these solvent compatibilities, such as ethyl cellulose, acetylbutyrylcellulose, polyethylene
Butyral etc., finally, selection and the preferable polyamide sodium thixotropic agent of resin solution compatibility.
First prepare mixed solvent: butyl acetate 40-70%, 12 10-30% of alcohol ester, diethylene glycol mono butyl
Ether 5-15%, dimethyl adipate 5-15%, repefral 0-10%, the sum of each component content are 100%.
Embodiment 8 weighs 65-80 parts of mixed solvent, 10-20 parts of organic additive, 1-5 parts of ethyl cellulose in proportion
Element, dissolves 1 hour at a temperature of 70 DEG C, and 1-10 part of thixotropic agent 1 hour of stirring is then added, obtain it is uniform have it is airborne
Body, each component content sum it be 100 parts.
Embodiment 9 weighs 65-80 parts of mixed solvent, 10-20 parts of organic additive, 1-5 parts of ethyl cellulose in proportion
Element and 1-5 parts of acetylbutyrylcellulose dissolve 1 hour at a temperature of 70 DEG C, and 1-10 parts of thixotropic agent stirring 1 is then added
A hour, obtain uniform organic carrier, each component content sum it be 100 parts.
Embodiment 10 weighs 65-80 parts of mixed solvent, 10-20 parts of organic additive, 1-5 parts of vinegar ester butyl ester fiber
Element, dissolves 1 hour at a temperature of 70 DEG C, and 1-10 part of thixotropic agent 1 hour of stirring is then added, obtain it is uniform have it is airborne
Body, each component content sum it be 100 parts.
Following table is the indices comparative situation using positive silver paste and comparative example slurry made of different embodiments:
| Line width um | The high um of line | Depth-width ratio | Disconnected grid (a) | Viscosity (pa.s) | |
| Embodiment 8 | 36-38 | 16-18 | 0.46 | 2 | 146 |
| Embodiment 9 | 34-36 | 18-20 | 0.54 | 1 | 115 |
| Embodiment 10 | 35-37 | 17-19 | 0.50 | 1 | 97 |
| Comparative example | 37-40 | 15-18 | 0.43 | 3 | 155 |
Wherein halftone is happy nation 325-16-22-15-26um, and embodiment smooth above it can print, wherein experimental example
Line width and pattern are best after 9 printings.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (7)
1. a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that: the thin grid slurry in the front is by following weight
The group of part is grouped as: silver powder 80-90%, glass powder 1-3%, organic carrier 6-10% and organic and inorganic assistant surplus, institute
Stating organic carrier includes solvent, auxiliary agent, resin and thixotropic agent, and the selection gist of solvent is pair in the organic carrier
It is good without net netting version wellability, while to the solvent of silicon wafer wellability difference, then select between resin and thixotropic agent and solvent
Compatibility performance, which reaches, most preferably makes the intermolecular interaction between organic carrier each component maximum.
2. according to claim 1 a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that: the glass
For glass powder using double glass powder systems, one kind is high pbo glass, and another kind is crown glass.
3. according to claim 1 a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that:
The solvent occupies hundred parts of airborne weight than being 60-80%, and organic solvent is selected from terpinol, alcohol ester 12,1- benzene oxygen
Base -2- propyl alcohol, DBE, dimethyl adipate, dimethyl glutarate, repefral, butyl acetate,
Tributyl citrate, dibutyl ethylene glycol ether, diethylene glycol monobutyl ether, one or more of triethylene glycol monomethyl ether.
4. according to claim 1 a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that: described to help
It is 10-20% that agent, which occupies airborne weight percentage, and auxiliary agent includes dispersing agent, surfactant, organo-silicic oil and disappears
Infusion.
5. according to claim 1 a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that: the tree
It is 1-15% that rouge, which occupies airborne weight percentage, and resin is selected from ethyl cellulose, acrylic resin, rosin resin, acetic acid fourth
Acid cellulose, cellulose acetate propionate, polyvinyl butyral, one of thermoplastic resin and polyvinylpyrrolidone or several
Kind.
6. according to claim 1 a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that: the touching
Become agent and occupy airborne weight percentage into 1-8%, thixotropic agent is in polyamide sodium, rilanit special, fumed silica
It is one or more of.
7. according to claim 1 a kind of applied to the thin grid slurry in front without net netting version, it is characterised in that: the front
Thin grid slurry adapts to tie screen printing process without net.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910041966.2A CN109903886A (en) | 2019-01-17 | 2019-01-17 | It is a kind of applied to the thin grid slurry in front without net netting version |
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| CN201910041966.2A CN109903886A (en) | 2019-01-17 | 2019-01-17 | It is a kind of applied to the thin grid slurry in front without net netting version |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114628057A (en) * | 2022-02-11 | 2022-06-14 | 广州市儒兴科技股份有限公司 | Organic carrier and application thereof |
| CN114628057B (en) * | 2022-02-11 | 2024-06-07 | 广州市儒兴科技股份有限公司 | Organic carrier and application thereof |
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| CN106448808A (en) * | 2016-12-12 | 2017-02-22 | 北京市合众创能光电技术有限公司 | Knotless screen printing front side silver paste for crystalline silicon solar cells |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114628057A (en) * | 2022-02-11 | 2022-06-14 | 广州市儒兴科技股份有限公司 | Organic carrier and application thereof |
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Application publication date: 20190618 |