CN109754905A - A kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste and preparation method thereof - Google Patents
A kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste and preparation method thereof Download PDFInfo
- Publication number
- CN109754905A CN109754905A CN201910143850.XA CN201910143850A CN109754905A CN 109754905 A CN109754905 A CN 109754905A CN 201910143850 A CN201910143850 A CN 201910143850A CN 109754905 A CN109754905 A CN 109754905A
- Authority
- CN
- China
- Prior art keywords
- parts
- silver paste
- crystal silicon
- silicon solar
- back side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention belongs to conductive silver paste fields used for solar batteries, specifically for a kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste.The silver paste is mainly made of 30-45 parts of flake silver powders, 15-25 parts of ball shape silver powders, 3-8 parts of lead-free glass powders, 0.2-0.5 parts of oxides, 33-40 parts of organic carriers, 0.3-0.8 parts of thixotropic agents and 0.2-0.5 parts of curtain coating inhibitor.The invention also discloses the preparation methods of the composition of organic carrier, the preparation of organic carrier and silver paste.By silver paste prepared by the present invention, with excellent thixotropic property, silver paste is in printing and sintering with excellent electrode pattern holding capacity, slurry will not overflow at laser windowing, greatly ensure that the integrality of Al-BSF at windowing, reduce back surface and lack sub- recombination rate, improve the open-circuit voltage and short circuit current for preparing battery, its open-circuit voltage lifting values is greater than 3mV, and short circuit current lifting values are greater than 2mA, final to promote battery efficiency 0.03-0.1%.
Description
Technical field
The present invention relates to a kind of high thixotroping PERC crystal silicon solar energy battery back side silver pastes and preparation method thereof, belong to and lead
Plasma-based material field particularly belongs to conductive silver paste field used for solar batteries.
Background technique
As photovoltaic " 531 " new policies and cheap internet access are extremely urgent, industry is for that can mention the high-efficiency solar of effect drop originally
Battery technology is increasingly paid attention to.Passivation emitter and rear-face contact (passivated emitter and rear contact,
PERC) battery is researched and developed by photovoltaic research institute, University of New South Wales the 1980s earliest.The technology
Due to being passivated to cell piece back surface, and back side Al-BSF carries out part by the hole region and silicon wafer of laser windowing
Contact, the back surface for effectively reducing battery is compound, improves minority carrier life time, improves the absorption to long wave, thus mentions significantly
The high transfer efficiency of battery.And its preparation process only increases lamination passivation layer compared with conventional batteries piece preparation process
With laser opening two procedures, producing line scrap build investment is small, and income is high, it has also become the most improved efficiency means of cost performance,
It is increasingly becoming the common process of P-type crystal silicon solar battery.According to statistics, 2018 end of the year PERC production capacities are more than 80GW, and arrive
The end of the year 2019, it is contemplated that further expansion is met or exceeded 110GW by PERC production capacity.
Since PERC cell backside increases alumina passivation layer, to prevent from destroying passivation layer during the sintering process, therefore
Its sintering temperature is lower than 850oC, lower than the sintering temperature of conventional batteries silver paste.At this temperature, conventional to carry on the back silver-colored contact resistance
Greatly, cell photoelectric transfer efficiency is low.Therefore, the prior art is studied mainly for glass powder, to reduce the burning of back side silver paste
Junction temperature improves the solderability and solder attachment power of electrode to form the contact resistivity of electrode after reducing low-temperature sintering.Such as
106887273 A of Chinese invention patent CN discloses a kind of PERC crystal silicon solar energy battery back silver paste and its preparation side
Method, sintering temperature are lower than current producing line normal sintering peak temperature, reduce low sintering contact resistivity.Chinese invention
107658044 A of patent CN discloses a kind of PERC crystal silicon solar battery back passivation silver paste of high anti-crack of backplane pulling force
And preparation method thereof.
However, for the PERC battery for using laser windowing, compared to the conventional batteries piece knot of no laser windowing
Structure, conventional back side silver paste organic carrier technology generally once 60%, can be led since the solid content of back side silver paste is relatively low
Cause slurry readily flowed, be applied to PERC battery, slurry may overflow at laser windowing, fill part laser is opened
Window increases manufacturing cost in this way, one increases will lead to the usage amount of back side silver paste；Two, back side silver paste flows into be belonged to originally
In subsequent printing at the windowing of back side aluminium paste, the formation area of back side Al-BSF will be substantially reduced, increases back surface minority
The recombination probability of carrier, thus the open-circuit voltage and short circuit current that will significantly affect battery, the photoelectricity for substantially reducing battery turns
Change efficiency.For this purpose, developing efficient PERC crystal silicon solar energy battery back side silver paste, the same of the matching of glass powder is being paid close attention to
When, also need rarely have public technology data to refer to this point organic moiety progress primary study.
Summary of the invention
To solve above-mentioned prior art shortcoming and defect, the purpose of the present invention is to provide a kind of having with high thixotropic
Airborne body, to meet mobility and printing requirement of the PERC battery for back side silver paste；
The object of the invention is also to provide a kind of high thixotropic PERC crystal silicon solar energy battery back side silver pastes, utilize the silver
The cell piece rear electrode of slurry printing preparation has good marginal definition, and slurry not overflow guarantees electricity at laser windowing
The efficiency of pond piece；
The object of the invention is also to provide the preparation methods of the silver paste.
To achieve the above object, the technical scheme adopted by the invention is that: a kind of high thixotroping PERC crystal silicon solar electricity
Pond back side silver paste, is grouped as by each group of following parts by weight:
30-45 parts of flake silver powder
15-25 parts of ball shape silver powder
3-8 parts of lead-free glass powder
0.2-0.5 parts of oxide
33-40 parts of organic carrier
0.3-0.8 parts of thixotropic agents
Inhibitor 0.2-0.5 parts of curtain coating
Above each composition total weight parts number is 100 parts, and wherein silver powder total amount is 55-60 parts.
The flake silver powder is commercially available crystal silicon solar battery back face silver paste flake silver powder, and D50 is 4-8 μm；
The ball shape silver powder is commercially available crystal silicon solar battery back face silver paste ball shape silver powder, and D50 is 1-2 μm；
The lead-free glass powder is commercially available or homemade crystal silicon solar battery back face silver paste lead-free glass powder, softening temperature
Spend 450-700oC；
The oxide is one or more of silica, bismuth oxide, zinc oxide mixture；
The thixotropic agents are one or more of polyamide wax, rilanit special, fumed silica mixture；
The curtain coating inhibitor is one or more of furancarboxylic acid, new certain herbaceous plants with big flowers acid, isooctyl acid mixture；
The organic carrier is grouped as by each group of following parts by weight:
5-15 parts of ethyl cellulose
25-35 parts of polyvinyl butyral
5-10 parts of phenoxy resin
5-10 parts of polyvinylpyrrolidone
15-25 parts of butyl carbitol acetate
5-10 parts of dibutyl ethylene glycol ether
5-10 parts of tripropylene glycol butyl ether
12 10-20 parts of alcohol ester
3-8 parts of dibutyl phthalate
Above each composition total weight parts number is 100 parts.
The preparation process of the organic carrier are as follows: by the above-mentioned solvent of formula ratio precise in reaction kettle, then to its
Middle addition formula ratio ethyl cellulose, polyvinyl butyral start agitating paddle, and are warming up to 55oC heating stirring dissolves 30 points
Clock, then it is separately added into phenoxy resin and polyvinylpyrrolidone thereto, it is continuously heating to 75oC heating stirring dissolves 30 points
Clock, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare.
A kind of preparation step of the high thixotroping PERC crystal silicon solar energy battery back side silver paste are as follows:
According to formula ratio precise organic carrier in the double-planet dispersion machine container with vacuum, water circulation cooling device, then
Ball shape silver powder is added thereto, stirs 30 minutes under vacuum, then put into flake silver powder thereto, is stirred under vacuum 30 minutes, to
Lead-free glass powder, oxide, thixotropic agents, curtain coating inhibitor are wherein successively put into, continues to be stirred under vacuum dispersion 30 minutes, be formed
Homogeneous mixture, the then homogeneous slurry through three-roll grinder grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen mistakes
Filter obtains fineness less than 10 μm, and viscosity range is 30-50Pa.S(10rpm), thixotropic index range is the viscosity under 6-8(1rpm
Than the viscosity under 10rpm) back side silver paste.
Theoretical basis of the invention is: one, polyvinyl butyral, polyvinylpyrrolidone have preferable thickening thixotroping
Property, it is used cooperatively using them with usual resins ethyl cellulose in organic carrier, is aided with certain thixotropic agents, Ke Yiti
The thixotropic property of high slurry guarantees that slurry had not only had good printing performance when printing, but also overflow filling does not occur and swashs
Light windowing；Two, phenoxy resin decomposition temperature with higher is aided with certain curtain coating inhibitor, can guarantee slurry sintered
It will not be cast since resin decomposition loses network in journey；Three, the oxides such as zinc oxide, bismuth oxide have reduction glass
The effect of glass softening point introduces the type oxide in system, so that formula design is no longer limited by glass powder type, Ke Yiyou
Peak temperature needed for effect reduces slurry reduces contact resistivity when low-temperature sintering, improves the designability of formula, improves
The transformation efficiency of cell piece, reduces the manufacturing cost of slurry；Four, silica is the main component to form frit, is
The key factor for forming frit, a certain amount of silica is additionally introduced in system, can increase the viscosity of glass phase, mention
Chemical stability, thermal stability and the mechanical strength of high glass phase can further suppress the stream of slurry when sintering at high temperature
It is dynamic.Therefore, inventive formulation design is based on the above theoretical basis, and the technology of the present invention purpose may be implemented.
Compared with prior art, the present invention have following significant technical advantage and the utility model has the advantages that
1) present invention reduces corrosive power of the sintering temperature raising glass to silicon nitride layer of glass without using flint glass powder,
With environment-friendly advantage；
2) PERC crystal silicon solar energy battery prepared by the present invention is lower than the common back side of current producing line with back side silver paste sintering temperature
Silver paste is sintered peak temperature, and sintering Shi Nengyu silicon substrate forms good Ohmic contact, reduces contact electricity when low-temperature sintering
Resistance rate；
3) organic carrier system that the present invention designs has excellent thixotropic property, is equipped with specific oxide system, the present invention
The back side silver paste of preparation in printing and sintering with excellent electrode pattern holding capacity, slurry will not overflow into laser windowing
Place, greatly ensure that the integrality of Al-BSF at windowing, reduces back surface and lack sub- recombination rate, improve and prepare battery
Open-circuit voltage and short circuit current, open-circuit voltage lifting values are greater than 3mV, and short circuit current lifting values are greater than 2mA, finally promote battery
Efficiency 0.03-0.1%.
4) present invention does not use special PERC battery special glass powder, therefore reduces the manufacturing cost of slurry.
Specific embodiment
The following are a specific embodiment of the invention, the embodiment described is in order to further describe the present invention, so that originally
The advantages of invention and feature can be easier to be understood by those skilled in the art, therefore not limit the present invention to the embodiment described and send out
In bright.
Embodiment 1
1) organic carrier is prepared: by successively 25 parts of precise solvent butyl carbitol acetate of formula ratio, two fourth of diethylene glycol
10 parts of ether, 5 parts of tripropylene glycol butyl ether, 12 parts of alcohol ester, 5 parts of dibutyl phthalate add in reaction kettle, then thereto
Enter 5 parts of ethyl cellulose, 25 parts of polyvinyl butyral, starts agitating paddle, and be warming up to 55oC heating stirring dissolves 30 minutes,
It is separately added into 10 parts and 5 parts of polyvinylpyrrolidone of phenoxy resin thereto again, is continuously heating to 75oThe dissolution of C heating stirring
30 minutes, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare；
2) it prepares slurry: being filled according to 40 parts of organic carrier of the above-mentioned preparation of formula ratio precise in band vacuum, water circulating cooling
In the double-planet dispersion machine container set, then it is 25 parts of ball shape silver powder of 2 μm that D50 is added thereto, is stirred 30 minutes under vacuum,
Investment D50 is 30 parts of flake silver powder of 4 μm thereto again, is stirred under vacuum 30 minutes, successively investment softening point is 450 theretooC
4 parts of lead-free glass powder, 0.1 part of silica, 0.05 part of bismuth oxide, 0.05 part of zinc oxide, thixotropic agents polyamide wax
0.5 part, it is cast 0.3 part of inhibitor furancarboxylic acid, continues to be stirred under vacuum dispersion 30 minutes, forms homogeneous mixture, then ground through three rollers
Homogeneous slurry of the grinding machine grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen filters, obtains fineness less than 10 μm, viscosity
For 32Pa.S(10rpm, 25oC), thixotropic index be 6.4(1rpm under viscosity ratio 10rpm under viscosity) back side silver paste；
3) slurry of above-mentioned preparation electric performance test: is printed on 156.75mm*156.75mm through silk screen printing process with 320 mesh halftones
The monocrystalline solar cells back side, be made after cell piece according to crystal silicon solar cell sheet production process and carry out photoelectric conversion effect
Rate test, accurate to compare producing line normal use slurry (1000pcs), cell piece open-circuit voltage (Voc) promotes 4mV, short circuit current
(Isc) 3mA is promoted, cell piece photoelectric conversion efficiency promotes 0.03%.
Embodiment 2
1) organic carrier is prepared: by successively 20 parts of precise solvent butyl carbitol acetate of formula ratio, two fourth of diethylene glycol
5 parts of ether, 10 parts of tripropylene glycol butyl ether, 12 parts of alcohol ester, 5 parts of dibutyl phthalate add in reaction kettle, then thereto
Enter 15 parts of ethyl cellulose, 20 parts of polyvinyl butyral, starts agitating paddle, and be warming up to 55oC heating stirring dissolves 30 points
Clock, then it is separately added into 5 parts and 10 parts of polyvinylpyrrolidone of phenoxy resin thereto, it is continuously heating to 75oC heating stirring is molten
Solution 30 minutes, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare；
2) it prepares slurry: being filled according to 36 parts of organic carrier of the above-mentioned preparation of formula ratio precise in band vacuum, water circulating cooling
In the double-planet dispersion machine container set, then it is 15 parts of ball shape silver powder of 1 μm that D50 is added thereto, is stirred 30 minutes under vacuum,
Investment D50 is 45 parts of flake silver powder of 8 μm thereto again, is stirred under vacuum 30 minutes, successively investment softening point is 700 theretooC
3 parts of lead-free glass powder, 0.1 part of silica, 0.2 part of bismuth oxide, 0.2 part of zinc oxide, thixotropic agents rilanit special
0.3 part, new 0.2 part of certain herbaceous plants with big flowers acid of curtain coating inhibitor, continues to be stirred under vacuum dispersion 30 minutes, homogeneous mixture is formed, then through three rollers
Homogeneous slurry of the grinder grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen filters, obtain fineness less than 10 μm, stick
Spending is 48Pa.S(10rpm, 25oC), thixotropic index be 7.2(1rpm under viscosity ratio 10rpm under viscosity) back side silver paste；
3) slurry of above-mentioned preparation electric performance test: is printed on 156.75mm*156.75mm through silk screen printing process with 320 mesh halftones
The monocrystalline solar cells back side, be made after cell piece according to crystal silicon solar cell sheet production process and carry out photoelectric conversion effect
Rate test, accurate to compare producing line normal use slurry (1000pcs), cell piece open-circuit voltage (Voc) promotes 4mV, short circuit current
(Isc) 4mA is promoted, cell piece photoelectric conversion efficiency promotes 0.05%.
Embodiment 3
1) organic carrier is prepared: by successively 15 parts of precise solvent butyl carbitol acetate of formula ratio, two fourth of diethylene glycol
10 parts of ether, 6 parts of tripropylene glycol butyl ether, 12 parts of alcohol ester, 8 parts of dibutyl phthalate add in reaction kettle, then thereto
Enter 10 parts of ethyl cellulose, 15 parts of polyvinyl butyral, starts agitating paddle, and be warming up to 55oC heating stirring dissolves 30 points
Clock, then it is separately added into 8 parts and 8 parts of polyvinylpyrrolidone of phenoxy resin thereto, it is continuously heating to 75oC heating stirring is molten
Solution 30 minutes, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare；
2) slurry is prepared: according to 38.5 parts of organic carrier of the above-mentioned preparation of formula ratio precise in band vacuum, water circulating cooling
In the double-planet dispersion machine container of device, then it is 20 parts of ball shape silver powder of 1.5 μm that D50 is added thereto, stirs 30 under vacuum
Minute, then investment D50 is 35 parts of flake silver powder of 5.2 μm thereto, is stirred under vacuum 30 minutes, successively puts into softening point thereto
It is 580o5 parts of the lead-free glass powder of C, 0.1 part of silica, 0.1 part of bismuth oxide, 0.1 part of zinc oxide, thixotropic agents gas phase
0.7 part of silica, it is cast 0.5 part of inhibitor isooctyl acid, continues to be stirred under vacuum dispersion 30 minutes, forms homogeneous mixture, so
Homogeneous slurry by three-roll grinder grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen filters, obtain fineness and be less than
10 μm, viscosity 36Pa.S(10rpm, 25oC), thixotropic index be 6.8(1rpm under viscosity ratio 10rpm under viscosity) back
Face silver paste；
3) slurry of above-mentioned preparation electric performance test: is printed on 156.75mm*156.75mm through silk screen printing process with 320 mesh halftones
The monocrystalline solar cells back side, be made after cell piece according to crystal silicon solar cell sheet production process and carry out photoelectric conversion effect
Rate test, accurate to compare producing line normal use slurry (1000pcs), cell piece open-circuit voltage (Voc) promotes 5mV, short circuit current
(Isc) 4mA is promoted, cell piece photoelectric conversion efficiency promotes 0.08%.
Embodiment 4
1) organic carrier is prepared: by successively 22 parts of precise solvent butyl carbitol acetate of formula ratio, two fourth of diethylene glycol
7 parts of ether, 8 parts of tripropylene glycol butyl ether, 12 parts of alcohol ester, 3 parts of dibutyl phthalate are added in reaction kettle, then thereto
12 parts of ethyl cellulose, 18 parts of polyvinyl butyral start agitating paddle, and are warming up to 55oC heating stirring dissolves 30 minutes,
It is separately added into 9 parts and 7 parts of polyvinylpyrrolidone of phenoxy resin thereto again, is continuously heating to 75oC heating stirring dissolution 30
Minute, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare；
2) it prepares slurry: being filled according to 33 parts of organic carrier of the above-mentioned preparation of formula ratio precise in band vacuum, water circulating cooling
In the double-planet dispersion machine container set, then it is 18 parts of ball shape silver powder of 1.2 μm that D50 is added thereto, stirs 30 points under vacuum
Clock, then investment D50 is 42 parts of flake silver powder of 4.6 μm thereto, is stirred under vacuum 30 minutes, successively investment softening point is thereto
540o6 parts of the lead-free glass powder of C, 0.2 part of silica, 0.1 part of bismuth oxide, 0.1 part of zinc oxide, thixotropic agents polyamide
0.2 part of wax, 0.2 part of rilanit special, it is cast 0.2 part of inhibitor furancarboxylic acid, continues to be stirred under vacuum dispersion 30 minutes, is formed uniformly mixed
Object is closed, then the homogeneous slurry through three-roll grinder grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen filters, obtained
Fineness is less than 10 μm, viscosity 43Pa.S(10rpm, and 25oC), thixotropic index is under the viscosity ratio 10rpm under 6.5(1rpm
Viscosity) back side silver paste；
3) slurry of above-mentioned preparation electric performance test: is printed on 156.75mm*156.75mm through silk screen printing process with 320 mesh halftones
The monocrystalline solar cells back side, be made after cell piece according to crystal silicon solar cell sheet production process and carry out photoelectric conversion effect
Rate test, accurate to compare producing line normal use slurry (1000pcs), cell piece open-circuit voltage (Voc) promotes 4mV, short circuit current
(Isc) 5mA is promoted, cell piece photoelectric conversion efficiency promotes 0.08%.
Embodiment 5
1) organic carrier is prepared: by successively 18 parts of precise solvent butyl carbitol acetate of formula ratio, two fourth of diethylene glycol
8 parts of ether, 6 parts of tripropylene glycol butyl ether, 12 parts of alcohol ester, 6 parts of dibutyl phthalate are added in reaction kettle, then thereto
8 parts of ethyl cellulose, 22 parts of polyvinyl butyral start agitating paddle, and are warming up to 55oC heating stirring dissolves 30 minutes, then
It is separately added into 10 parts and 10 parts of polyvinylpyrrolidone of phenoxy resin thereto, is continuously heating to 75oC heating stirring dissolution 30
Minute, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare；
2) slurry is prepared: according to 33.6 parts of organic carrier of the above-mentioned preparation of formula ratio precise in band vacuum, water circulating cooling
In the double-planet dispersion machine container of device, then it is 20 parts of ball shape silver powder of 1.8 μm that D50 is added thereto, stirs 30 under vacuum
Minute, then investment D50 is 38 parts of flake silver powder of 6.3 μm thereto, is stirred under vacuum 30 minutes, successively puts into softening point thereto
It is 620o7 parts of the lead-free glass powder of C, 0.1 part of silica, 0.2 part of bismuth oxide, 0.2 part of zinc oxide, thixotropic agents hydrogenation
0.4 part of castor oil, 0.1 part of fumed silica, new 0.4 part of certain herbaceous plants with big flowers acid of curtain coating inhibitor, continue to be stirred under vacuum dispersion 30 minutes, shape
At homogeneous mixture, the then homogeneous slurry through three-roll grinder grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen mistakes
Filter, obtains fineness less than 10 μm, viscosity 39Pa.S(10rpm, and 25oC), thixotropic index is the viscosity ratio under 7.4(1rpm
Viscosity under 10rpm) back side silver paste；
3) slurry of above-mentioned preparation electric performance test: is printed on 156.75mm*156.75mm through silk screen printing process with 320 mesh halftones
The monocrystalline solar cells back side, be made after cell piece according to crystal silicon solar cell sheet production process and carry out photoelectric conversion effect
Rate test, accurate to compare producing line normal use slurry (1000pcs), cell piece open-circuit voltage (Voc) promotes 6mV, short circuit current
(Isc) 5mA is promoted, cell piece photoelectric conversion efficiency promotes 0.1%.
Embodiment 6
1) organic carrier is prepared: by successively 20 parts of precise solvent butyl carbitol acetate of formula ratio, two fourth of diethylene glycol
7 parts of ether, 10 parts of tripropylene glycol butyl ether, 12 parts of alcohol ester, 5 parts of dibutyl phthalate add in reaction kettle, then thereto
Enter 10 parts of ethyl cellulose, 20 parts of polyvinyl butyral, starts agitating paddle, and be warming up to 55oC heating stirring dissolves 30 points
Clock, then it is separately added into 7 parts and 6 parts of polyvinylpyrrolidone of phenoxy resin thereto, it is continuously heating to 75oC heating stirring is molten
Solution 30 minutes, it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring, packages spare；
2) slurry is prepared: according to 34.8 parts of organic carrier of the above-mentioned preparation of formula ratio precise in band vacuum, water circulating cooling
In the double-planet dispersion machine container of device, then it is 17 parts of ball shape silver powder of 1.6 μm that D50 is added thereto, stirs 30 under vacuum
Minute, then investment D50 is 39 parts of flake silver powder of 7.2 μm thereto, is stirred under vacuum 30 minutes, successively puts into softening point thereto
It is 500o8 parts of the lead-free glass powder of C, 0.05 part of silica, 0.15 part of bismuth oxide, 0.1 part of zinc oxide, thixotropic agents are poly-
0.3 part of amide waxe, 0.2 part of rilanit special, it is cast 0.4 part of inhibitor isooctyl acid, continues to be stirred under vacuum dispersion 30 minutes, be formed
Homogeneous mixture, the then homogeneous slurry through three-roll grinder grinding distribution to fineness less than 12 μm, then through 300 mesh silk screen mistakes
Filter, obtains fineness less than 10 μm, viscosity 41Pa.S(10rpm, and 25oC), thixotropic index is the viscosity ratio 10rpm under 7(1rpm
Under viscosity) back side silver paste；
3) slurry of above-mentioned preparation electric performance test: is printed on 156.75mm*156.75mm through silk screen printing process with 320 mesh halftones
The monocrystalline solar cells back side, be made after cell piece according to crystal silicon solar cell sheet production process and carry out photoelectric conversion effect
Rate test, accurate to compare producing line normal use slurry (1000pcs), cell piece open-circuit voltage (Voc) promotes 5mV, short circuit current
(Isc) 4mA is promoted, cell piece photoelectric conversion efficiency promotes 0.07%.
Above embodiments only technical concepts and features to illustrate the invention, its object is to allow the sheet for being familiar with technique
Field personnel can understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.All bases
The equivalent transformation or modification that spirit of the invention is done, are covered by the protection scope of the present invention.
Claims (4)
1. a kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste, it is characterised in that the slurry is by following parts by weight
Several each groups are grouped as:
30-45 parts of flake silver powder
15-25 parts of ball shape silver powder
3-8 parts of lead-free glass powder
0.2-0.5 parts of oxide
33-40 parts of organic carrier
0.3-0.8 parts of thixotropic agents
Inhibitor 0.2-0.5 parts of curtain coating
Above each composition total weight parts number is 100 parts, and wherein silver powder total amount is 55-60 parts；
Wherein the flake silver powder is commercially available crystal silicon solar battery back face silver paste flake silver powder, and D50 is 4-8 μm；
The ball shape silver powder is commercially available crystal silicon solar battery back face silver paste ball shape silver powder, and D50 is 1-2 μm；
The lead-free glass powder is commercially available or homemade crystal silicon solar battery back face silver paste lead-free glass powder, softening temperature
Spend 450-700oC；
The oxide is one or more of silica, bismuth oxide, zinc oxide mixture；
The thixotropic agents are one or more of polyamide wax, rilanit special, fumed silica mixture；
The curtain coating inhibitor is one or more of furancarboxylic acid, new certain herbaceous plants with big flowers acid, isooctyl acid mixture.
2. organic carrier according to claim 1, it is characterised in that the organic carrier by following parts by weight each component
Composition:
5-15 parts of ethyl cellulose
25-35 parts of polyvinyl butyral
5-10 parts of phenoxy resin
5-10 parts of polyvinylpyrrolidone
15-25 parts of butyl carbitol acetate
5-10 parts of dibutyl ethylene glycol ether
5-10 parts of tripropylene glycol butyl ether
12 10-20 parts of alcohol ester
3-8 parts of dibutyl phthalate
Above each composition total weight parts number is 100 parts.
3. according to claim 1, organic carrier described in 2, it is characterised in that the preparation process of the organic carrier are as follows: press formula ratio
Precise solvent is in reaction kettle, then formula ratio ethyl cellulose, polyvinyl butyral are added thereto, starting stirring
Paddle, and it is warming up to 55oC heating stirring dissolves 30 minutes, then is separately added into phenoxy resin and polyvinylpyrrolidone thereto,
It is continuously heating to 75oC heating stirring dissolves 30 minutes, and it is as clear as crystal that the specific time is subject to lysate, and cooling stops stirring,
It packages spare.
4. a kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste according to claim 1, it is characterised in that
The preparation step of the slurry are as follows: according to formula ratio precise organic carrier in the double-planet with vacuum, water circulation cooling device
In dispersion machine container, then ball shape silver powder is added thereto, stirs 30 minutes under vacuum, then put into flake silver powder thereto, very
Sky stirring 30 minutes successively puts into lead-free glass powder, oxide, thixotropic agents, curtain coating inhibitor thereto, continues to be stirred under vacuum
Dispersion 30 minutes forms homogeneous mixture, then the homogeneous slurry through three-roll grinder grinding distribution to fineness less than 12 μm, then
Through 300 mesh silk screen filters, fineness is obtained less than 10 μm, viscosity range is 30-50Pa.S(10rpm), thixotropic index range is 6-8
The back side silver paste of (viscosity under viscosity ratio 10rpm under 1rpm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143850.XA CN109754905A (en) | 2019-02-27 | 2019-02-27 | A kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143850.XA CN109754905A (en) | 2019-02-27 | 2019-02-27 | A kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109754905A true CN109754905A (en) | 2019-05-14 |
Family
ID=66407802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910143850.XA Pending CN109754905A (en) | 2019-02-27 | 2019-02-27 | A kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109754905A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110223799A (en) * | 2019-06-17 | 2019-09-10 | 常州宝邦新能源材料有限公司 | A kind of electrocondution slurry and with its manufactured semiconductor device |
| CN110459343A (en) * | 2019-06-19 | 2019-11-15 | 南通天盛新能源股份有限公司 | A kind of full Al-BSF crystal silicon solar energy battery low-temperature sintering type back side silver paste |
| CN111681804A (en) * | 2020-06-09 | 2020-09-18 | 上海三屹电子科技有限公司 | Conductive paste for in-mold electronic technology (IME) and preparation method thereof |
| WO2021063149A1 (en) * | 2019-09-30 | 2021-04-08 | 无锡帝科电子材料股份有限公司 | Conductive paste, preparation method therefor, application thereof, solar cell electrode having same, and solar cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157332A (en) * | 2014-08-29 | 2014-11-19 | 天津市职业大学 | Silicon solar cell front face electrode lead-free silver paste and preparing method thereof |
| CN106067331A (en) * | 2016-08-11 | 2016-11-02 | 海宁市瑞银科技有限公司 | A kind of solar energy back of the body passivation PERC battery silver paste used for back electrode |
| CN106847368A (en) * | 2015-11-24 | 2017-06-13 | 普兰特光伏有限公司 | Printing slurry for improveing the material properties of metal particle layer |
| CN108883965A (en) * | 2016-04-07 | 2018-11-23 | 贺利氏贵金属北美康舍霍肯有限责任公司 | For the halide glass in the Metal slurry of silicon solar cell |
-
2019
- 2019-02-27 CN CN201910143850.XA patent/CN109754905A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157332A (en) * | 2014-08-29 | 2014-11-19 | 天津市职业大学 | Silicon solar cell front face electrode lead-free silver paste and preparing method thereof |
| CN106847368A (en) * | 2015-11-24 | 2017-06-13 | 普兰特光伏有限公司 | Printing slurry for improveing the material properties of metal particle layer |
| CN108883965A (en) * | 2016-04-07 | 2018-11-23 | 贺利氏贵金属北美康舍霍肯有限责任公司 | For the halide glass in the Metal slurry of silicon solar cell |
| CN106067331A (en) * | 2016-08-11 | 2016-11-02 | 海宁市瑞银科技有限公司 | A kind of solar energy back of the body passivation PERC battery silver paste used for back electrode |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110223799A (en) * | 2019-06-17 | 2019-09-10 | 常州宝邦新能源材料有限公司 | A kind of electrocondution slurry and with its manufactured semiconductor device |
| CN110223799B (en) * | 2019-06-17 | 2020-11-10 | 常州宝邦新能源材料有限公司 | Conductive paste and semiconductor device made of same |
| CN110459343A (en) * | 2019-06-19 | 2019-11-15 | 南通天盛新能源股份有限公司 | A kind of full Al-BSF crystal silicon solar energy battery low-temperature sintering type back side silver paste |
| WO2021063149A1 (en) * | 2019-09-30 | 2021-04-08 | 无锡帝科电子材料股份有限公司 | Conductive paste, preparation method therefor, application thereof, solar cell electrode having same, and solar cell |
| CN111681804A (en) * | 2020-06-09 | 2020-09-18 | 上海三屹电子科技有限公司 | Conductive paste for in-mold electronic technology (IME) and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109754905A (en) | A kind of high thixotroping PERC crystal silicon solar energy battery back side silver paste and preparation method thereof | |
| CN107721183B (en) | A kind of two-sided PERC back of solar cell electrode slurry glass powder and preparation method thereof | |
| CN103915127B (en) | Front silver paste for high sheet resistance silicon-based solar cell and preparing method of front silver paste | |
| CN106935309B (en) | Passivating back crystal silicon solar energy battery aluminium paste and preparation method thereof | |
| CN106477897A (en) | Glass dust and apply this glass dust be obtained anelectrode silver paste, solaode | |
| WO2015014032A1 (en) | Aluminium paste dedicated for local aluminium back surface field crystalline silicon solar cell and preparation method therefor | |
| CN106024095B (en) | A kind of solar cell anaerobic glass electrocondution slurry | |
| US11756699B1 (en) | Conductive silver aluminum paste, preparation method, electrode and cell | |
| CN102881351B (en) | Back tin electrode slurry for crystalline silicon photovoltaic cells and method for preparing back tin electrode slurry | |
| CN110364286B (en) | Single-crystal double-sided PERC battery back electrode silver paste and preparation method thereof | |
| CN110459343B (en) | Low-temperature sintering type back silver paste for all-aluminum back surface field crystalline silicon solar cell | |
| CN105355693A (en) | PERC solar photovoltaic cell capable of improving photoelectric conversion efficiency | |
| CN107331434A (en) | A kind of crystal silicon solar energy battery major-minor grid line separation printing positive silver paste combination and preparation method thereof | |
| CN112159111B (en) | Lead-free and bismuth-free glass powder for PERC solar cell aluminum paste and preparation method thereof | |
| CN104681123B (en) | Back silver paste of solar cell and preparation method thereof, solar cell and preparation method thereof | |
| US11784277B2 (en) | Method for preparing P-type crystalline silicon rear electrode | |
| CN103730207B (en) | A kind of preparation method of monocrystaline silicon solar cell aluminium paste | |
| CN105405488A (en) | Aluminium paste for laser pore-forming partial back contact-passivating emitter crystalline silicon solar cell and preparation method and application thereof | |
| WO2018040570A1 (en) | Local contact back surface field aluminum paste for high-efficiency double-sided crystalline silicon solar cell and preparation method thereof | |
| CN109659068A (en) | Full Al-BSF crystal silicon solar energy battery low temperature curing type back side silver paste | |
| CN109390075A (en) | Full Al-BSF crystal silicon solar energy battery high-tensile strength low temperature curing type back side silver paste | |
| CN106098146A (en) | High-efficiency crystal silicon solar battery local back field aluminum paste and the application in PERC battery | |
| CN109166646B (en) | Environment-friendly aluminum electrode paste for back-passivated silicon solar cell | |
| CN116230289B (en) | Composition for P+ surface of solar cell, preparation method of composition and solar cell | |
| CN108877989B (en) | Anti-light-decay PERC monocrystalline silicon solar cell aluminum paste and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190514 |