CN109686472A - A kind of one pack system HJT battery low temperature silver paste - Google Patents

A kind of one pack system HJT battery low temperature silver paste Download PDF

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Publication number
CN109686472A
CN109686472A CN201811652931.4A CN201811652931A CN109686472A CN 109686472 A CN109686472 A CN 109686472A CN 201811652931 A CN201811652931 A CN 201811652931A CN 109686472 A CN109686472 A CN 109686472A
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powder
parts
conductive
low temperature
silver paste
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CN109686472B (en
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何家文
丁冰冰
刘银花
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Guangzhou Ruxing Technology Development Co.,Ltd.
Wuxi ruxing Technology Development Co., Ltd
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GUANGZHOU RUXING TECHNOLOGY DEVELOPMENT Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20Conductive material dispersed in non-conductive organic material
    • H01B1/22Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02Details
    • H01L31/0224Electrodes
    • H01L31/022408Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells

Abstract

The invention discloses a kind of one pack system HJT battery low temperature silver pastes, comprise the following components in parts by weight: the first 50~90 parts of conductive powder, 5~40 parts of the second conductive powder, 1~2 part of heat reactive resin, 0~5 part of curing agent, 0~5 part of auxiliary agent;First conductive powder is flake silver powder, and second conductive powder is at least one of nanometer conductive powder, low melting point conductive metal powder, low melting point electrical conductivity alloy powder, high-melting-point conductive metal powder, high-melting-point electrical conductivity alloy powder.HJT battery low temperature silver paste of the invention has solidify after resistivity is low, conductive particle combination adhesive force is good, good mistake net, excellent depth-width ratio, good resistance to photodissociation, resistance to ag(e)ing, and cost is lower.

Description

A kind of one pack system HJT battery low temperature silver paste
Technical field
The present invention relates to and conductive silver paste and the conductive silver paste preparation method, and in particular to a kind of one pack system HJT Battery low temperature silver paste.
Background technique
HJT battery be at present can one of the high-efficiency battery of mass production surface metal silver paste is wanted due to its unique structure There is difference substantially in the crystal silicon battery for summing traditional.Conventional metals conductive silver paste is high temperature sintering type, and silver paste itself combines Contact between silver-colored silicon is formed by high temperature sintering.Solidification that HJT battery low temperature silver paste (is lower than 250 DEG C) at a lower temperature, There is no a high temperature sintering, organic macromolecule crosslinking curing is mainly leaned in the contact between Argent grain and between Argent grain and TCO. The contact interface of conventional batteries is silver paste and silicon nitride anti-reflecting film, and HJT battery is TCO film and elargol.
Existing HJT battery low temperature silver paste is mainly flake silver powder as conductive phase, with epoxy resin, acrylic resin, Base polyurethane prepolymer for use as and curing agent, additive etc. are used as organic moiety.
The prior art has the disadvantages that
1) conductive phase mainly uses silver powder, and the cost is relatively high.
2) contact of the contact between particle and particle between matrix mainly by the solidification between resin in conjunction with, resin contains When measuring high, attachment is relatively preferable but resistivity can be high.And resin content it is low when, resistivity can be low, but adhesion effect can be deteriorated.Cause This is leaned on merely between resin solidification bonded particulate and adhesive force and resistivity balance are bad between particle and conductive film.
3) in epoxy resin generally there are benzene ring structure, comparatively more crisp and resistance to photodissociation, resistance to ag(e)ing is not good enough.And It needs after silver paste solidification by illumination, therefore light fastness will be got well after resin solidification.
4) form of construction work of low temperature silver paste is mainly printed in HJT battery, and the net performance excessively of slurry is needed to get well.And HJT Having in silver powder in low temperature silver paste is greatly flakelike powder, for relatively spherical sprills, flakelike powder cross net and Linear higher temperatures slug type silver paste after printing is obviously weaker.
5) contact after TCO film layer solidifies with silver paste needs to be promoted.
Summary of the invention
There is provided that a kind of adhesive force is good, resistivity it is an object of the invention to overcome in place of the shortcomings of the prior art One pack system HJT battery low temperature silver paste low, mistake net performance is good.
To achieve the above object, the technical scheme adopted by the invention is as follows: a kind of one pack system HJT battery low temperature silver paste, packet Include the component of following parts by weight: the first 50~90 parts of conductive powder, 5~40 parts of the second conductive powder, 1~2 part of heat reactive resin, 0~5 part of curing agent, 0~5 part of auxiliary agent;First conductive powder is flake silver powder, and second conductive powder is nano silver Powder, low melting point conductive metal powder, low melting point electrical conductivity alloy powder, high-melting-point conductive metal powder, high-melting-point electrical conductivity alloy powder At least one of end.
Conductive phase part of the invention is using inexpensive conductive metal powder (refractory metal powder and high-melting-point alloy powder End), use cost can be reduced to a certain extent.The present invention is other than organic resin is as Binder Phase, and there are also low melting point powder Fusion, nano particle sintering be used as accessory attachment Binder Phase, make 200 DEG C, 30min minutes or so solidify after, conductive particle it Between in addition to there is the solidification of resin bonding, there are also the fusion between the sintering of nano particle and low-melting-point metal powder, make conductive The combination adhesive force of grain further increases.So that adhesive force and conductivity are balanced, avoid the prior art because between particle Contact between matrix of contact and particle is combined mainly by the solidification between resin, and when resin content is high, attachment is relatively preferable But resistivity can be high.And resin content it is low when, resistivity can be low, but adhesion effect can be deteriorated.Therefore viscous by resin solidification merely Adhesive force and resistivity balance bad problem between knot particle and between particle and conductive film.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the low temperature silver paste second is conductive Nano-silver powder in powder is 10~40 parts by weight, the low melting point conductive metal powder, low melting point electrical conductivity alloy powder, Gao Rong Point conductive metal powder, high-melting-point electrical conductivity alloy powder are 0~10 parts by weight.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the low temperature silver paste includes following The component of parts by weight: 30~40 parts of nano-silver powder in 60~70 parts of first conductive powder, the second conductive powder, low melting point Conductive metal powder, low-melting alloy powder, high-melting-point conductive metal powder, high-melting-point electrical conductivity alloy powder summation are 2~7 Part, 1~2 part of heat reactive resin, 0.05~0.5 part of curing agent, 2.5~4.5 parts of auxiliary agent.
The proportion of each component of the present invention influences the performance of HJT battery low temperature silver paste, when each group distribution ratio is in the scope of the invention Within when, HJT battery low temperature silver paste of the invention has resistivity after solidification low, and the combination adhesive force of conductive particle is good, good Good depth-width ratio after crossing net and solidification, slurry are suitble to more narrow linewidth halftone, and depth-width ratio is more excellent, under the premise of keeping resistivity Light-receiving area is further increased, transfer efficiency is increased.With good resistance to photodissociation, resistance to ag(e)ing.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the low temperature silver paste includes following The component of parts by weight: 30 parts of nano-silver powder, low melting point conductive metal in 65 parts of first conductive powder, the second conductive powder Powder or low-melting alloy powder are 5 parts, 1.5 parts of heat reactive resin, 0.05 part of curing agent, 3 parts of auxiliary agent.
When 30 parts by weight of nano-silver powder, (low melting point gold in 65 parts of the first conductive powder (flake silver powder), the second conductive powder Category or alloy powder or refractory metal or alloy powder) 5 parts by weight, 1.5 parts by weight of heat reactive resin, 1.5 weight of curing agent When part, 3 parts by weight of auxiliary agent, HJT battery low temperature silver paste of the invention has optimal electric conductivity, adhesion performance, crosses net Depth-width ratio, resistance to photodissociation and resistance to ag(e)ing after more preferably solidifying.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the nanometer conductive powder is nanometer Silver powder, the low melting point conductive metal powder are indium powder, and low melting point electrical conductivity alloy powder is sn-bi alloy powder, high-melting-point conductive gold Category powder is nickel powder, and high-melting-point electrical conductivity alloy powder is silver-coated copper powder.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the flake silver powder piece radius D50 For 1um~15um, preferably 2um~10um.Specific surface area is in 0.1~0.8m2/ g, preferably 0.2~0.5m2/g.Tap density is 1 ~10g/cm3, preferably 4~6g/cm3.500 DEG C of 30min burn out rates of flake silver powder are less than 0.5%, and preferably 0.2~0.4%.Nanometer The D50 of silver powder is not more than 80nm.The radius of flake silver powder, tap density affect the performance of conductive silver paste, and sheet silver is carefully led very much It is electrically relatively weaker, it is bad to will lead to very much net greatly.Therefore, it selects in radius D50 to be 1um~15um, and when D50 is 2um~10um crosses net performance and electric conductivity more preferably, the higher silver powder of tap density, and accumulation compactness can be more preferable.Nanometer Silver powder serves low sintering, makes to contact between Argent grain more preferable, electric conductivity is more preferable, when tap density is 7~8g/cm3, lead Electrical property is more preferably.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the heat reactive resin is no benzene One of the epoxy resin of ring structure, organic siliconresin, hydroxylated acrylic resin, polyester resin, base polyurethane prepolymer for use as.It is excellent The epoxy resin of selection of land, no benzene ring structure selects hydrogenated bisphenol A epoxy resin.
Organic carrier as powder.The main reactivity considered with curing agent of the selection of resin, cured product Electric conductivity, light shine and resistance to ag(e)ing.Generally there are benzene ring structure in epoxy resin in the prior art, it is comparatively more crisp and Resistance to photodissociation, resistance to ag(e)ing are not good enough.And it needs after silver paste solidification by illumination, therefore light fastness will be got well after resin solidification. Can to avoid cause after light resin cured matter degradation and decomposition electric conductivity be deteriorated.The present invention is selected without benzene ring structure or fast light The better resin of light resistance is solved as matrix resin, such as acrylic resin, the reactant of polyisocyanates and carbonate polyol Deng so that resistance to photodissociation, resistance to ag(e)ing more preferably, to not influence electric conductivity.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, curing agent is enclosed type isocyanic acid Ester, the compound containing blocked isocyanate group, amine chemicals, amine complex compound, acid anhydrides, aginomoto curing agent PN- 23J, MY-25, one of Fuji's chemical conversion 1020.Such curing agent at normal temperature with resin portion Fails To Respond, when heated It exposes active function groups part and resin activity part and carries out cross linking reaction and solidification.
It further include 0.4~0.5 parts by weight as the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention Additive, the additive be adipic acid, at least one of glutaric acid.Additive of the invention such as adipic acid, glutaric acid Equal substances have removal effect to the organic substance of metal powder surface, reduce the resistance value after solidifying.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the auxiliary agent is dispersing agent, thixotroping At least one of agent, levelling agent, lubricant, diluent.The present invention adds dispersing agent, thixotropic agent, levelling agent, profit in the slurry Lubrication prescription, diluent improve slurry printing characteristic, cross net, it is made to have better depth-width ratio.
As the preferred embodiment of one pack system HJT battery low temperature silver paste of the present invention, the dispersing agent be byk163, One of BYK180;Dispersing agent, which primarily serves dispersion, reduces the effect of viscosity;
The thixotropic agent is one of fumed silica, organobentonite, graphene;
The levelling agent is organosilicon levelling agent or acrylic acid levelling agent;
The lubricant is silicone oil or paraffin;
The diluent is butyl carbitol or terpinol.The main principle that diluent is selected is that diluent is keeping good Under the premise of dilution capacity, the latency of curing agent cannot be destroyed, the service life of single-component conductive slurry cannot be influenced.
The beneficial effects of the present invention are:
1, the unicity of conductive phase silver powder is solved, is partially replaced using high performance-price ratio conductive powder.
2, other than organic resin is as Binder Phase, introduce other low-melting-point metal conductive nano powder or other Material, after making 200 DEG C of solidifications in 30min minutes or so, in addition to there is the solidification of resin bonding between conductive particle, there are also low melting point powder The sintering of last fusion, nano particle is as accessory attachment Binder Phase.
3, it selects without benzene ring structure or the resistance to better resin of photodissociation light resistance as matrix resin.
4, depth-width ratio after net and solidification was printed in optimization under existence conditions, and slurry is made to be suitble to more narrow linewidth halftone, high Wide ratio is more excellent, and light-receiving area is further increased under the premise of keeping resistivity, increases transfer efficiency.
5, in addition to itself need to have sufficiently low resistivity after the addition excessive substance in interface (indium oxide powder) elargol solidifies, together When with TCO film layer have good contact effect, substrate upper conductive film is not destroyed or is preferably minimized destruction.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention It is described further.
Each raw material involved by following embodiment is commercially available versatile material unless otherwise instructed.
Embodiment 1
A kind of one pack system HJT battery low temperature silver paste embodiment of the invention, one pack system HJT battery described in the present embodiment are used Low temperature silver paste constituent is as shown in table 1.
The low temperature silver paste of one pack system HJT battery shown in the present embodiment the preparation method comprises the following steps:
After being weighed by formula, by resin, the first conductive powder, the second conductive powder morning planetary stirring machine platform according to (1000 turns/min) turn 70s and are mixed, and are rolled after stirring, and then addition crosses three rollers after curing agent, auxiliary agent is added Milling train.
Embodiment 2~5 and comparative example 1-2
The constituent component of embodiment 2~5 and comparative example 1~2 is as shown in table 1,1~2 institute of embodiment 2~5 and comparative example The preparation method is the same as that of Example 1 for the one pack system HJT battery low temperature silver paste stated.
Burn out rate is the burn out rate measured in 500 DEG C of 30min.
Meanwhile the following performance of low temperature silver paste of one pack system HJT battery described in testing example 1~5 and comparative example 1~2: Resistivity after solidification, adhesive force, resistance to photodissociation, resistance to ag(e)ing, printed it is linear high wide after net, product service life, solidification Than.Wherein, the test method of each performance are as follows:
Resistivity after solidification: printing fixed pattern (long 10cm, width 1mm serpentine pattern), measuring resistance value after solidification.According to public affairs Formula R=ρ L/S converses resistivity.
Printed net: continuous printing 3h under halftone (360 mesh -16um line footpath -30um line width) observes network blocking situation, breaks Line situation.
Linear depth-width ratio after solidification: it is tested after solidification with 3D microscope
Adhesive force: welding test welding pulling force after solidification
Resistance to photodissociation: sun-proof instrument 1000h observes color change, resistivity attenuation
Resistance to ag(e)ing: TC200 electrical property attenuation
Test result is as shown in table 2.
Table 1
--- expression is not added.
Table 2
As shown in Table 2, the component using one pack system HJT battery low temperature silver paste of the present invention of Examples 1 to 5 has solid Resistivity is low after change, conductive particle combination adhesive force is good, good depth-width ratio after crossing net and solidification, and slurry is suitble to narrower line Wide screen version, depth-width ratio is more excellent, and light-receiving area is further increased under the premise of keeping resistivity, increases transfer efficiency, has simultaneously There is good resistance to photodissociation, resistance to ag(e)ing has longer service life.The one pack system HJT battery low temperature silver paste of comparative example 1 Without the second conductive powder, conductive powder only with flake silver powder, remaining component within the scope of the present invention, after solidification Resistivity it is higher, electric conductivity is worse, while its binding force between resin is worse, comparative example 2 use contain benzene ring structure Bisphenol A epoxide resin content it is higher, adhesive force is improved relative to comparative example 1, but its resistivity relative to the present invention more Height, so that electric conductivity is worse.Comparative example 1 and comparative example 2 do not contain additive adipic acid, glutaric acid substance, due to adipic acid, The substances such as glutaric acid have removal effect to the organic substance of metal powder surface, have the function of reducing the resistance value after solidifying, Therefore, electric conductivity is not as good as the present invention.Embodiment 5 does not contain auxiliary agent, and the auxiliary agent in comparative example 1 and comparative example 2 contains only dilution Agent, and as can be known from the results, embodiment 5, the net excessively of comparative example 1~2, depth-width ratio are not so good as the embodiment of the present invention 1~4.Reason exists In printing net and be affected by lubricant, depth-width ratio is affected by thixotropic agent.
Effect example 1
The proportion of each component of the present invention influences the performance of one pack system HJT battery low temperature silver paste, to investigate each group distribution ratio To the influence of low temperature silver paste performance of one pack system HJT battery, applicant is prepared for test group and control according to the method for embodiment 1 Group one pack system HJT battery low temperature silver paste, and one pack system HJT battery low temperature silver paste performance in accordance with the above-mentioned embodiment 1~5 Test method, test the performance of this effect example test group and control group one pack system HJT battery low temperature silver paste.
In this effect example, the proportion of each component is different, remaining is all the same, and each group distribution ratio is as shown in table 3.
In test group and control group, the first conductive powder uses flake silver powder, and radius D50 is 8um, and specific surface area is 0.5m2/ g, tap density 8g/cm3, the nano-silver powder radius D50 of the second conductive powder is 50nm, and heat reactive resin uses hydroxyl Base acrylic resin, curing agent use blocked isocyanate, and auxiliary agent uses thixotropic agent and lubricant.
In this effect example, test group and control group the performance test results are as shown in table 4.
Table 3
Table 4
As shown in Table 4, the proportion of each component of the present invention influences the performance of HJT battery low temperature silver paste, when each group distribution ratio exists When within the scope of the invention, it is low that HJT battery low temperature silver paste of the invention has resistivity after solidification, and the combination of conductive particle is attached Put forth effort, good depth-width ratio after crossing net and solidification, slurry is suitble to more narrow linewidth halftone, and depth-width ratio is more excellent, is keeping resistance Light-receiving area is further increased under the premise of rate, increases transfer efficiency.With good resistance to photodissociation, resistance to ag(e)ing.When first 30~40 parts by weight of nano-silver powder, (low-melting-point metal in 60~70 parts by weight of conductive powder (flake silver powder), the second conductive powder Or alloy powder or refractory metal or alloy powder) 2~7 parts by weight, 1~2 parts by weight of heat reactive resin, curing agent 0.05~ When 0.5 parts by weight, 2.5~4.5 parts by weight of auxiliary agent, the present invention have more preferably electric conductivity, adhesion performance, cross net and more Depth-width ratio, resistance to photodissociation and resistance to ag(e)ing after excellent solidification, when 65 parts of the first conductive powder (flake silver powder), the second conductive powder Middle 30 parts by weight of nano-silver powder, (low-melting-point metal or alloy powder or refractory metal or alloy powder) 5 parts by weight, heat cure When 1.5 parts by weight of resin, 1.5 parts by weight of curing agent, 3 parts by weight of auxiliary agent, HJT battery low temperature silver paste of the invention has optimal Electric conductivity, adhesion performance cross net and more preferably depth-width ratio, resistance to photodissociation and resistance to ag(e)ing after solidification.
Effect example 2
This effect example has investigated each property of the first conductive powder to the performance of one pack system HJT battery low temperature silver paste It influences, to investigate influence of each property of the first conductive powder to one pack system HJT battery low temperature silver paste performance, applicant is pressed It is prepared for test group and control group one pack system HJT battery low temperature silver paste according to the method for embodiment 1, and in accordance with the above-mentioned embodiment 1 The test method of~5 one pack system HJT battery low temperature silver paste performances, tests this effect example test group and control group single group Divide the performance of HJT battery low temperature silver paste.
In this effect example, except property (radius D50, specific surface area, tap density, the flake silver powder 500 of the first conductive powder DEG C 30min burn out rate) it is different, remaining is all the same, and in test group and control group, one pack system HJT battery low temperature silver paste includes The component of following parts by weight: 65 parts of flake silver powder, 35 parts of nano-silver powder, 5 parts of indium powder, 1.6 parts of hydrogenated bisphenol A epoxy resin, envelope 0.4 part of closed form isocyanates, 2.5 parts release agent, 0.5 part of lubricant, 0.5 part of adipic acid.
In this effect example, the radius D50 of the first conductive powder of test group and control group, specific surface area, tap density, sheet 500 DEG C of 30min burn out rates of silver powder are as shown in table 5, and the performance test results are as shown in table 6.
Table 5
Table 6
From 6 data of table it is found that 500 DEG C of radius D50, specific surface area, tap density, the flake silver powder of the first conductive powder 30min burn out rate on one pack system HJT battery with low temperature silver paste performance influence mainly resistivity, cross net performance influence, other Performance influences less, and wherein electric conductivity is relatively weaker for sheet silver too thin (< 1um), and the increase of the radius with flake silver powder, Although electric conductivity improves, it crosses the decline of net performance, and the burn out rate of control group 2 is greater than 0.65%, and resistivity increases.Vibration The higher silver powder of real density, accumulation compactness can be more preferable.Nano-silver powder serves low sintering, makes to contact between Argent grain More preferably, electric conductivity is more preferable.As can be known from the results, when the radius D50 of flake silver powder is 2um~10um, specific surface area be 0.2~ 0.5m2/ g, tap density are 4~6g/cm3, 500 DEG C of 30min burn out rates of flake silver powder are 0.2~0.4%, obtained low-temperature silver Starch comprehensive performance more preferably.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention And range.

Claims (10)

1. a kind of one pack system HJT battery low temperature silver paste, which is characterized in that comprise the following components in parts by weight: the first conducting powder Last 50~90 parts, 5~40 parts of the second conductive powder, 1~2 part of heat reactive resin, 0~5 part of curing agent, 0~5 part of auxiliary agent;It is described First conductive powder is flake silver powder, and second conductive powder is nanometer conductive powder, low melting point conductive metal powder, low melting point At least one of electrical conductivity alloy powder, high-melting-point conductive metal powder, high-melting-point electrical conductivity alloy powder.
2. low temperature silver paste according to claim 1, which is characterized in that the nanometer conductive powder in second conductive powder is 10~40 parts by weight, the low melting point conductive metal powder, low melting point electrical conductivity alloy powder, high-melting-point conductive metal powder, height Fusing point electrical conductivity alloy powder is 0~10 parts by weight.
3. low temperature silver paste according to claim 2, which is characterized in that including following components in parts by weight: described first leads 30~40 parts of nanometer conductive powder, low melting point conductive metal powder, low melting point in 60~70 parts of electro-powder, the second conductive powder close Bronze end, high-melting-point conductive metal powder, high-melting-point electrical conductivity alloy powder summation are 2~7 parts, 1~2 part of heat reactive resin, consolidate 0.05~0.5 part of agent, 2.5~4.5 parts of auxiliary agent.
4. low temperature silver paste according to claim 3, which is characterized in that including following components in parts by weight: described first leads 30 parts of nano-silver powder, low melting point conductive metal powder or low-melting alloy powder in 65 parts of electro-powder, the second conductive powder are 5 Part, 1.5 parts of heat reactive resin, 0.05 part of curing agent, 3 parts of auxiliary agent.
5. low temperature silver paste according to any one of claims 1 to 4, which is characterized in that the nanometer conductive powder is nano silver Powder, the low melting point conductive metal powder are indium powder, and low melting point electrical conductivity alloy powder is sn-bi alloy powder, high-melting-point conductive metal Powder is nickel powder, and high-melting-point electrical conductivity alloy powder is silver-coated copper powder.
6. low temperature silver paste according to any one of claims 1 to 4, which is characterized in that the flake silver powder piece radius D50 is 1um~15um, specific surface area is in 0.1~0.8m2/ g, tap density are 1~10g/cm3, 500 DEG C of 30min burn out rates of flake silver powder Less than 0.5%;The D50 of nanometer conductive powder is not more than 80nm;Preferably, the flake silver powder piece radius D50 is 2um~10um, Specific surface area is in 0.2~0.5m2/ g, tap density are 4~6g/cm3, burn out rate is 0.2~0.4%.
7. low temperature silver paste according to any one of claims 1 to 4, which is characterized in that the heat reactive resin is no phenyl ring One of the epoxy resin of structure, organic siliconresin, hydroxylated acrylic resin, polyester resin, base polyurethane prepolymer for use as;It is preferred that The epoxy resin on ground, no benzene ring structure selects hydrogenated bisphenol A epoxy resin.
8. low temperature silver paste according to any one of claims 1 to 4, which is characterized in that curing agent be blocked isocyanate, Compound containing blocked isocyanate group, amine chemicals, amine complex compound, acid anhydrides, aginomoto curing agent PN-23J, MY-25, one of Fuji's chemical conversion 1020.
9. low temperature silver paste according to claim 1, which is characterized in that further include the additive of 0.4~0.5 parts by weight, institute Stating additive is adipic acid, at least one of glutaric acid.
10. low temperature silver paste according to any one of claims 1 to 4, which is characterized in that the auxiliary agent is dispersing agent, thixotroping Agent, at least one of levelling agent, lubricant, diluent;Preferably, the dispersing agent is one of byk163, BYK180; The thixotropic agent is one of fumed silica, organobentonite, graphene;
The levelling agent is organosilicon levelling agent or acrylic acid levelling agent;
The lubricant is silicone oil or paraffin;
The diluent is butyl carbitol or terpinol.
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CN110459621A (en) * 2019-07-26 2019-11-15 南昌大学 A kind of soldering paste and preparation method thereof for replacing low temperature silver paste to prepare solar cel electrode grid line
CN110580970A (en) * 2019-09-02 2019-12-17 东莞市银屏电子科技有限公司 High-adhesion low-temperature conductive silver paste for solar HIT (heterojunction with intrinsic thin layer) cell and preparation method thereof
CN110853794A (en) * 2019-10-30 2020-02-28 上海润势科技有限公司 Conductive paste
CN112071468A (en) * 2020-09-11 2020-12-11 南京苏煜新能源科技有限公司 Conductive slurry for HJT battery and preparation method thereof
CN112071466A (en) * 2020-08-12 2020-12-11 江苏国瓷泓源光电科技有限公司 Silver paste suitable for spraying ceramic filter and preparation method and spraying film forming method thereof
CN112562885A (en) * 2020-12-29 2021-03-26 四川东树新材料有限公司 High-welding-tension main grid low-temperature silver paste for solar heterojunction battery and preparation method thereof
CN112837844A (en) * 2021-03-01 2021-05-25 佛山市瑞纳新材科技有限公司 HJT low-temperature curing silver paste with dual curing properties and preparation method thereof
CN113012844A (en) * 2021-03-01 2021-06-22 佛山市瑞纳新材科技有限公司 HJT low-temperature silver paste capable of being rapidly cured and sintered and preparation method thereof
CN113284645A (en) * 2021-04-25 2021-08-20 广州汉源新材料股份有限公司 Nano silver paste and preparation method thereof
CN113284644A (en) * 2021-04-13 2021-08-20 广州市儒兴科技开发有限公司 Silver paste for heterojunction battery and preparation method and application thereof
CN113707365A (en) * 2021-09-01 2021-11-26 江苏正能电子科技有限公司 Low-temperature curing conductive silver paste for solar HJT fine grid and preparation method thereof
CN114023494A (en) * 2022-01-10 2022-02-08 南通俊丰新材料科技有限公司 Graphene solar HJT battery front silver paste and preparation method thereof
CN114023487A (en) * 2021-10-26 2022-02-08 苏州市贝特利高分子材料股份有限公司 HJT photovoltaic silver paste and preparation method thereof
CN114496343A (en) * 2021-12-21 2022-05-13 宁波维柔电子科技有限公司 Conductive main grid silver paste for HIT solar cell and preparation method thereof
CN114999707A (en) * 2022-07-07 2022-09-02 江苏日御光伏新材料科技有限公司 HJT silver paste and application thereof
WO2023061476A1 (en) * 2021-10-14 2023-04-20 武宇涛 Conductive paste for photovoltaic cell

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CN105938732A (en) * 2016-07-08 2016-09-14 东莞珂洛赫慕电子材料科技有限公司 Thermal curing conductive slurry and preparation method thereof
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KR20120004122A (en) * 2010-07-06 2012-01-12 제일모직주식회사 Electrode paste and electrode using the same
CN102467989A (en) * 2010-11-15 2012-05-23 第一毛织株式会社 Conductive paste composition and electrode prepared using the same
CN105938732A (en) * 2016-07-08 2016-09-14 东莞珂洛赫慕电子材料科技有限公司 Thermal curing conductive slurry and preparation method thereof
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Cited By (21)

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CN110350054A (en) * 2019-06-13 2019-10-18 东方环晟光伏(江苏)有限公司 A kind of printing process of solar energy crystal-silicon battery slice
CN110459621B (en) * 2019-07-26 2021-07-20 南昌大学 Soldering paste for replacing low-temperature silver paste to prepare electrode grid line of solar cell and preparation method thereof
CN110459621A (en) * 2019-07-26 2019-11-15 南昌大学 A kind of soldering paste and preparation method thereof for replacing low temperature silver paste to prepare solar cel electrode grid line
CN110580970A (en) * 2019-09-02 2019-12-17 东莞市银屏电子科技有限公司 High-adhesion low-temperature conductive silver paste for solar HIT (heterojunction with intrinsic thin layer) cell and preparation method thereof
CN110853794A (en) * 2019-10-30 2020-02-28 上海润势科技有限公司 Conductive paste
CN112071466B (en) * 2020-08-12 2022-03-18 江苏国瓷泓源光电科技有限公司 Silver paste suitable for spraying ceramic filter and preparation method and spraying film forming method thereof
CN112071466A (en) * 2020-08-12 2020-12-11 江苏国瓷泓源光电科技有限公司 Silver paste suitable for spraying ceramic filter and preparation method and spraying film forming method thereof
CN112071468A (en) * 2020-09-11 2020-12-11 南京苏煜新能源科技有限公司 Conductive slurry for HJT battery and preparation method thereof
CN112562885A (en) * 2020-12-29 2021-03-26 四川东树新材料有限公司 High-welding-tension main grid low-temperature silver paste for solar heterojunction battery and preparation method thereof
CN112837844A (en) * 2021-03-01 2021-05-25 佛山市瑞纳新材科技有限公司 HJT low-temperature curing silver paste with dual curing properties and preparation method thereof
CN112837844B (en) * 2021-03-01 2022-07-15 佛山市瑞纳新材科技有限公司 HJT low-temperature curing silver paste with dual curing properties and preparation method thereof
CN113012844A (en) * 2021-03-01 2021-06-22 佛山市瑞纳新材科技有限公司 HJT low-temperature silver paste capable of being rapidly cured and sintered and preparation method thereof
CN113284644A (en) * 2021-04-13 2021-08-20 广州市儒兴科技开发有限公司 Silver paste for heterojunction battery and preparation method and application thereof
CN113284645A (en) * 2021-04-25 2021-08-20 广州汉源新材料股份有限公司 Nano silver paste and preparation method thereof
CN113707365A (en) * 2021-09-01 2021-11-26 江苏正能电子科技有限公司 Low-temperature curing conductive silver paste for solar HJT fine grid and preparation method thereof
CN113707365B (en) * 2021-09-01 2023-07-04 江苏正能电子科技有限公司 Low-temperature curing conductive silver paste for solar HJT fine grid and preparation method thereof
WO2023061476A1 (en) * 2021-10-14 2023-04-20 武宇涛 Conductive paste for photovoltaic cell
CN114023487A (en) * 2021-10-26 2022-02-08 苏州市贝特利高分子材料股份有限公司 HJT photovoltaic silver paste and preparation method thereof
CN114496343A (en) * 2021-12-21 2022-05-13 宁波维柔电子科技有限公司 Conductive main grid silver paste for HIT solar cell and preparation method thereof
CN114023494A (en) * 2022-01-10 2022-02-08 南通俊丰新材料科技有限公司 Graphene solar HJT battery front silver paste and preparation method thereof
CN114999707A (en) * 2022-07-07 2022-09-02 江苏日御光伏新材料科技有限公司 HJT silver paste and application thereof

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