CN109897389A - A kind of crystal silicon solar batteries front side silver paste organic carrier and preparation method - Google Patents
A kind of crystal silicon solar batteries front side silver paste organic carrier and preparation method Download PDFInfo
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- CN109897389A CN109897389A CN201711285317.4A CN201711285317A CN109897389A CN 109897389 A CN109897389 A CN 109897389A CN 201711285317 A CN201711285317 A CN 201711285317A CN 109897389 A CN109897389 A CN 109897389A
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- organic carrier
- silver paste
- front side
- crystal silicon
- silicon solar
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Abstract
The present invention relates to a kind of crystal silicon solar batteries front side silver paste organic carriers and preparation method thereof, the organic carrier is the mixture of resin, solvent and auxiliary agent, the mass ratio of the resin, solvent and auxiliary agent is 10-16:55-70:4-8, and the auxiliary agent is thixotropic agent and dispersing agent.Compared with prior art, the organic carrier prepared by the present invention is in silicon solar cell front side silver paste, silver paste prints line width can be lower than 40um, and depth-width ratio is more advantageous to the efficiency for promoting crystal silicon battery greater than 0.4.
Description
Technical field
The present invention relates to technical field of solar batteries, more particularly, to a kind of crystal silicon solar batteries front side silver paste with having
Airborne body and preparation method.
Background technique
Crystal silicon solar batteries conductive silver paste be produce solar battery sheet key auxiliary material, divide front side silver paste and
Two class of back side silver paste.Wherein front side silver paste is to be printed on the positive slurry of crystal silicon solar batteries, plays front collected current
Effect, continually developing for front side silver paste is to improve one of the important means of cell piece transfer efficiency.
Crystal silicon solar batteries front side silver paste is by the particle of (99.9%) metallic silver of high-purity, unorganic glass phase, organic
Carrier is formed.The height of each component grade, the number of content and shape, size suffer from close pass to silver paste performance
The property of system, each component is different, and role is also different in the slurry.
Wherein the effect of organic carrier is silver powder, glass powder, additive etc. to be mixed into paste, and guarantee that slurry has one
Fixed printing performance.
Organic carrier mainly has following requirement: (1) should be chemically inert material.Carrier is contacted with solid powder/particle (to be included in
Under heating state) when, it cannot chemically react.(2) suspended substance can be formed.On the interface that carrier is in contact with solid powder/particle,
Surface tension answer it is small, to guarantee to infiltrate well between solid and liquid.There should be the polar group for making electrolyte stable in liquid,
There should not be excessive coagulating agent, avoid slurry from coagulating in long-term storage rotten.(3) there is appropriate rheological characteristic.Carrier with
When solid powder/particle combines, the cohesion composition of reticular structure can be provided, to form creeping type thixotroping system.The viscosity of carrier will fit
In, and be adjusted.(4) there is appropriate volatility.Saturated vapour pressure wants low to carrier at room temperature.But at a certain temperature,
In solvent answer volatile, can volatilize rapidly at high temperature, the slurry of wire mark is made not generate secondary flow phenomenon.(5) it bonds
Performance is good.Carrier can infiltrate ceramic substrate surface, therefore its surface tension should be appropriate, can be firmly adhered on substrate.
(6) other characteristics.Carrier should gradually vaporize during heating, burn without fixed boiling point.Avoid the needle on resistive film
Hole.Answer completely burned without staying ash content at a high temperature of certain.
Chinese patent CN102592709A discloses a kind of solar cell conductive silver paste organic carrier and preparation method thereof
With the conductive silver paste containing the organic carrier, the composition of organic carrier includes organic solvent, thickener, levelling agent, surface-active
Agent and plasticizer further include defoaming agent and viscosity modifier.The preparation method of organic carrier include configuration raw material, addition auxiliary agent and
Heating stirring dissolves three steps.
The above patent formulation mainly passes through addition viscosity modifier, increases the suspending power and mobility of organic carrier, made
The slurry obtained is more stable, prevented from caking, precipitating and layering；In silk-screen printing by can quickly flow drawout when shear stress, thoroughly
Net slurry is reduced, and printing weight in wet base is substantially reduced；When the use of defoaming agent reduces production in slurry bubble quantity, guarantee printing
Figure densification, bubble-free stomata.Above-mentioned patent does not relate to the silver paste printing silver pastes main performance index such as line width and depth-width ratio.
Chinese patent CN107045897A discloses a kind of silver paste of solar cells organic carrier and preparation method thereof；It should
Battery silver paste organic carrier includes following parts by weight substance: 70~90 parts of organic solvent, 5~15 parts of glass powder, hydrogenated castor
Oily 0.5~3 part, 5~15 parts of thickener, 0.1~0.8 part of cationic surfactant, 3~6 parts of coupling agent.
Above-mentioned patent organic carrier constituent is complicated, including coupling agent etc., by changing coupling agent molecule in organic carrier
In functional group and thickener occur coupled action, moreover it is possible to have an effect with silver powder surface, make organic carrier and substrate surface knot
It closes closer；Surfactant and the polymer compatibility in electronic silver slurry are good, and conductive silver powder dispersion can be made more preferable and right
The surface quality for improving film layer after electronic silver slurry prints is beneficial；Thickener has fully ensured that electronic silver slurry is swiped through in screen printing
Slurry excellent transfer and excellent thick-film conductor figure from silk-screen halftone to workpiece surface are formed in journey, and which solve thick film elements
It is easy to appear blistering in the fabrication process with circuit, the problems such as peeling, corrugation, loose, graphics resolution are difficult to improve.It is above-mentioned special
Although benefit refers to can be improved the depth-width ratio of electrode and grid line after sintering, specific data are not provided.
Summary of the invention
The object of the invention is in order to provide a kind of new crystal silicon solar batteries front side silver paste organic carrier and system
Preparation Method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of crystal silicon solar batteries front side silver paste organic carrier, the organic carrier are resin, solvent and auxiliary agent
Mixture, the mass ratio of the resin, solvent and auxiliary agent are 10-16:55-70:4-8, and the auxiliary agent is thixotropic agent and dispersing agent.
The resin is 2,6 di tert butyl 4 methyl phenol, ethyl cellulose, polyvinyl butyral resin, ethylene-vinegar
One or more of mixing of vinyl acetate resin, rosin glyceride.
The solvent is the sour methyl esters of nylon three, decylene glycol ester, dipropylene glycol propyl ether, butyl acetate, adjacent benzene
One or more of mixing of dibutyl carboxylic acid.
The thixotropic agent is one of polyamide wax, modified hydrogenated castor oil.
The dispersing agent is the mixing of one or more of glyceryl tristearate, atoleine, vinyl bis-stearamides.
The preparation method of the crystal silicon solar batteries front side silver paste organic carrier, which is characterized in that including following
Step:
(1) weigh each raw material respectively in mass ratio: the mass ratio of resin, solvent and auxiliary agent is 10-16:55-70:4-8,
Auxiliary agent is thixotropic agent and dispersing agent；
(2) it presses first solubilizer, add resin again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant,
It is stirred, obtains crystal silicon solar batteries front side silver paste organic carrier.
Mixing speed in the step (2) is 2500-3500r/min, 70-90 DEG C of temperature, mixing time 25-
45min.It is cooled to room temperature after the completion of step (2) stirring.
Compared with prior art, the organic carrier prepared by the present invention is used in silicon solar cell front side silver paste, silver paste
40um can be lower than by printing line width, and depth-width ratio is greater than 0.4, be more advantageous to the efficiency for promoting crystal silicon battery.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.
Embodiment 1:
Resin in the organic carrier are as follows: ethyl cellulose and rosin glyceride；Solvent are as follows: glyceryl tristearate
Alcohol, decylene glycol ester and butyl acetate；Thixotropic agent are as follows: modified hydrogenated castor oil；Dispersing agent are as follows: three glycerol stearates
Ester and atoleine.
Each component is weighed according to mass ratio:
(1) resin (ethyl cellulose and rosin glyceride=2:5, mass ratio, similarly hereinafter) 14, solvent (three glycerol stearates
Ester alcohol: decylene glycol ester: butyl acetate=26:24:1) 66, thixotropic agent (modified hydrogenated castor oil) 4, dispersing agent
(glyceryl tristearate: atoleine=1:1) 2.
(2) it presses first solubilizer, add various resins again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant.
Mixing speed in the step (2) is 3000r/min, and temperature is 90 DEG C, jitter time 30min, after the completion
It is cooled to room temperature, obtains organic carrier.
Embodiment 2:
Resin in the organic carrier are as follows: 2,6 di tert butyl 4 methyl phenol and polyvinyl butyral resin；Solvent
Are as follows: dibutyl phthalate, decylene glycol ester and butyl acetate；Thixotropic agent are as follows: modified hydrogenated castor oil；Dispersion
Agent are as follows: glyceryl tristearate and atoleine.
(1) each component is weighed according to mass ratio:
Resin (2,6- di-tert-butyl-4-methy phenols and polyvinyl butyral resin=2:5) 13, solvent (O-phthalic
Dibutyl phthalate: decylene glycol ester: butyl acetate=10:12:1) 66, thixotropic agent (modified hydrogenated castor oil) 4, dispersion
Agent (glyceryl tristearate: atoleine=1:1) 2.
(2) it presses first solubilizer, add various resins again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant.
Mixing speed in the step (2) is 3000r/min, and temperature is 90 DEG C, jitter time 30min, after the completion
It is cooled to room temperature, obtains organic carrier.
Embodiment 3:
Resin in the organic carrier are as follows: ethylene-vinyl acetate resin and polyvinyl butyral resin；Solvent are as follows:
Dipropylene glycol propyl ether, decylene glycol ester, butyl acetate and dibutyl phthalate；Thixotropic agent are as follows: polyamide wax；
Dispersing agent are as follows: atoleine.
(1) each component is weighed according to mass ratio:
Resin (ethylene-vinyl acetate resin: polyvinyl butyral resin=2:3) 13, solvent (dipropylene glycol propyl ether:
Decylene glycol ester: butyl acetate: dibutyl phthalate=5:5:2:1) 68, thixotropic agent (polyamide wax) 6, point
Powder (atoleine) 2.
(2) it presses first solubilizer, add various resins again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant.
Mixing speed in the step (2) is 3000r/min, and temperature is 90 DEG C, jitter time 30min, after the completion
It is cooled to room temperature, obtains organic carrier.
Embodiment 4:
Resin in the organic carrier are as follows: ethylene-vinyl acetate resin, polyvinyl butyral resin and rosin glycerol
Rouge；Solvent are as follows: dipropylene glycol propyl ether, decylene glycol ester, butyl acetate and dibutyl phthalate；Thixotropic agent
Are as follows: polyamide wax；Dispersing agent are as follows: vinyl bis-stearamides and atoleine.
(1) each component is weighed according to mass ratio:
Resin (ethylene-vinyl acetate resin: polyvinyl butyral resin: rosin glyceride=1:2:5) 13, solvent
(dipropylene glycol propyl ether: decylene glycol ester: butyl acetate: dibutyl phthalate=5:5:12:1) 68, thixotroping
Agent (polyamide wax) 6, dispersing agent (vinyl bis-stearamides: atoleine=1:1) 2.
(2) it presses first solubilizer, add various resins again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant.
Mixing speed in the step (2) is 3000r/min, and temperature is 90 DEG C, jitter time 30min, after the completion
It is cooled to room temperature, obtains organic carrier.
Embodiment 5:
Resin in the organic carrier is polyvinyl butyral resin and rosin glyceride；Solvent are as follows: dipropylene glycol third
Ether, decylene glycol ester, butyl acetate and dibutyl phthalate；Thixotropic agent are as follows: polyamide wax；Dispersing agent are as follows:
Atoleine.
(1) each component is weighed according to mass ratio:
Resin polyvinyl butyral resin: rosin glyceride=1:3) 14, solvent (dipropylene glycol propyl ether: ten alcohol esters: diethyl
Glycol monobutyl ether acetate: dibutyl phthalate=5:5:12:1) 66, thixotropic agent (polyamide wax) 5, dispersing agent (vinyl
Bis-stearamides: atoleine=1:1) 2.
(2) it presses first solubilizer, add various resins again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant.
Mixing speed in the step (2) is 3000r/min, and temperature is 90 DEG C, jitter time 30min, after the completion
It is cooled to room temperature, obtains organic carrier.
Comparative example 1:
Resin in the organic carrier is polyvinyl butyral resin and rosin glyceride；Solvent are as follows: decylene glycol ester and
Butyl acetate；Thixotropic agent are as follows: polyamide wax；Dispersing agent are as follows: atoleine.
(1) each component is weighed according to mass ratio:
Resin polyvinyl butyral resin: rosin glyceride=1:3) 14, solvent (decylene glycol ester: butyl vinegar
Acid esters=10:13) 68, thixotropic agent (polyamide wax) 5, dispersing agent (atoleine) 2.
(2) it presses first solubilizer, add various resins again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant.
Mixing speed in the step (2) is 3000r/min, and temperature is 90 DEG C, jitter time 30min, after the completion
It is cooled to room temperature, obtains organic carrier.
Depth-width ratio test:
Above-described embodiment 1-5 and 1 organic carrier of comparative example are prepared into crystal silicon solar batteries front side silver paste and printed
At battery grid line, grid line depth-width ratio test is carried out with 3D microscope.Test result such as table 1.
Table 1
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (8)
1. a kind of crystal silicon solar batteries front side silver paste organic carrier, which is characterized in that the organic carrier is resin, solvent
With the mixture of auxiliary agent, the mass ratio of the resin, solvent and auxiliary agent is 10-16:55-70:4-8, and the auxiliary agent is thixotropic agent
And dispersing agent.
2. a kind of crystal silicon solar batteries front side silver paste organic carrier according to claim 1, which is characterized in that described
Resin is 2,6 di tert butyl 4 methyl phenol, ethyl cellulose, polyvinyl butyral resin, ethylene-vinyl acetate tree
One or more of mixing of rouge, rosin glyceride.
3. a kind of crystal silicon solar batteries front side silver paste organic carrier according to claim 1, which is characterized in that described
Solvent is nylon three sour methyl esters, decylene glycol ester, dipropylene glycol propyl ether, butyl acetate, dibutyl phthalate
One or more of mixing.
4. a kind of crystal silicon solar batteries front side silver paste organic carrier according to claim 1, which is characterized in that described
Thixotropic agent is one of polyamide wax, modified hydrogenated castor oil.
5. a kind of crystal silicon solar batteries front side silver paste organic carrier according to claim 1, which is characterized in that described
Dispersing agent is the mixing of one or more of glyceryl tristearate, atoleine, vinyl bis-stearamides.
6. the preparation method of crystal silicon solar batteries front side silver paste organic carrier according to any one of claims 1 to 5,
Characterized by comprising the following steps:
(1) weigh each raw material respectively in mass ratio: the mass ratio of resin, solvent and auxiliary agent is 10-16:55-70:4-8, auxiliary agent
For thixotropic agent and dispersing agent；
(2) it presses first solubilizer, add resin again, raw material are successively added to dispersing stirrer by the sequence of last adding assistant, are carried out
Stirring, obtains crystal silicon solar batteries front side silver paste organic carrier.
7. the preparation method of crystal silicon solar batteries front side silver paste organic carrier according to claim 6, feature exist
In, mixing speed in the step (2) be 2500-3500r/min, 70-90 DEG C of temperature, mixing time 25-45min.
8. the preparation method of crystal silicon solar batteries front side silver paste organic carrier according to claim 6, feature exist
In step (2) stirring is cooled to room temperature after the completion.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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