CN105810293B - A kind of rear electrode for crystal silicon solar battery silver paste and preparation method thereof - Google Patents
A kind of rear electrode for crystal silicon solar battery silver paste and preparation method thereof Download PDFInfo
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- CN105810293B CN105810293B CN201610315748.XA CN201610315748A CN105810293B CN 105810293 B CN105810293 B CN 105810293B CN 201610315748 A CN201610315748 A CN 201610315748A CN 105810293 B CN105810293 B CN 105810293B
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- silicon solar
- solar battery
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 56
- 239000004332 silver Substances 0.000 title claims abstract description 56
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 31
- 239000010703 silicon Substances 0.000 title claims abstract description 31
- 239000013078 crystal Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 20
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- 229910052726 zirconium Inorganic materials 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 229920002521 macromolecule Polymers 0.000 claims description 13
- 239000003960 organic solvent Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 11
- 229910052787 antimony Inorganic materials 0.000 claims description 10
- 229910052788 barium Inorganic materials 0.000 claims description 10
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 229910052745 lead Inorganic materials 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 229910052758 niobium Inorganic materials 0.000 claims description 10
- 229910052711 selenium Inorganic materials 0.000 claims description 10
- 229910052712 strontium Inorganic materials 0.000 claims description 10
- 229910052715 tantalum Inorganic materials 0.000 claims description 10
- 229910052721 tungsten Inorganic materials 0.000 claims description 10
- 229910052714 tellurium Inorganic materials 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 7
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 6
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 6
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 6
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 5
- 229920000178 Acrylic resin Polymers 0.000 claims description 5
- 239000001856 Ethyl cellulose Substances 0.000 claims description 5
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 5
- -1 alcohol ester Chemical class 0.000 claims description 5
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims description 5
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920001249 ethyl cellulose Polymers 0.000 claims description 5
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 5
- 229910052740 iodine Inorganic materials 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 229920005749 polyurethane resin Polymers 0.000 claims description 4
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 230000032683 aging Effects 0.000 abstract description 5
- 238000005476 soldering Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 10
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 238000000498 ball milling Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 229910052794 bromium Inorganic materials 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical group CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor 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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sustainable Development (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photovoltaic Devices (AREA)
- Conductive Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The present invention relates to a kind of rear electrode for crystal silicon solar battery silver paste, more particularly it relates to rear electrode for crystal silicon solar battery silver paste of a kind of high reliability, high adhesion force and preparation method thereof.The back electrode silver paste includes each component of following percentage by weight：Ball shape silver powder I 5 30%, ball shape silver powder II 5 30%, flake silver powder 5 30%, glass dust 2 6%, organic carrier 10 40%, inorganic additive 0.1 4%；The back electrode silver paste has higher ageing resistace, high adhesion force and reliability, and is adapted to automatic soldering technique.
Description
Technical field
The present invention relates to a kind of rear electrode for crystal silicon solar battery silver paste, more particularly it relates to which a kind of height can
By property, the rear electrode for crystal silicon solar battery silver paste of high adhesion force and preparation method thereof.
Background technology
Because the finiteness of non-renewable resources causes to have a strong impact on to global climate and environment in use with it
And destruction, people increasingly pay close attention to the utilization of the renewable resources such as wind energy, water energy, solar cell, especially solar cell
Most paid close attention to by people.Current China solar cell yield, more than 20G watts, is the first big production of world's solar cell
State.However, the key equipment of China's solar cell, raw material heavy dependence import, particularly crystal silicon solar energy battery are silver-colored
Slurry uses import silver paste, such as Dupont, the magnitude of South Korea three, the serious benign development for constraining China's photovoltaic industry mostly.
Crystal silicon solar energy battery be it is a kind of can convert solar energy into the semiconductor devices of electric energy, under illumination condition too
Positive energy inside battery can produce photogenerated current, can be exported electric energy by electrode.In the prior art, back electrode of solar cell
It is main to use metal silver paste, mainly it is made up of silver powder, glass dust, carrier, and according to the high performance requirement of cell panel, it is needed
Silver paste is wanted to have the Ohmic contact after excellent printing, sintering with silicon chip good, adhesive force and welding performance are excellent etc..
At present, the preparation of rear electrode for crystal silicon solar battery silver paste has many deficiencies.On the one hand, in order to carry
The weldability of highback electrode silver plasm, increases the content of silver powder, the silver powder content of most of back electrode silver paste is reached 65-70%, make
Into the increase and the waste of resource of production cost, but the content of simple reduction silver powder, the decline of welding performance can be caused again, is welded
Connect bad, influence the long-term use stability of cell piece.On the other hand, because the reliability and stability of back electrode silver paste are direct
The service life of crystal silicon solar battery component is have impact on, therefore, the ageing resistance and crystal silicon solar energy battery group of silver paste
Whether the combination of silver-colored aluminium is firmly very important technical indicator in part, still, in the prior art most of back electrode silver paste
Ageing resistace is poor, silver-colored aluminium junction aluminium paste easily comes off, it is impossible to meet the demand of user.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high reliability, the crystal silicon solar energy battery of high adhesion force
Back electrode silver paste and preparation method thereof, the back electrode silver paste has higher ageing resistace, high adhesion force and reliability, and
It is adapted to automatic soldering technique.
In order to realize foregoing invention purpose, this invention takes following technical scheme：
A kind of rear electrode for crystal silicon solar battery silver paste, the back electrode silver paste includes each group of following percentage by weight
Point：The 5-30% of ball shape silver powder I, ball shape silver powder II 5-30%, flake silver powder 5-30%, glass dust 2-6%, organic carrier 10-40%, nothing
Machine additive 0.1-4%；Wherein, the average grain diameter D of the ball shape silver powder I50For 100-500nm, the ball shape silver powder II is averaged
Particle diameter D50For 0.5-1.0 μm, the average grain diameter D of the flake silver powder50For 0.5-1.0 μm.
In one embodiment, the back electrode silver paste includes each component of following percentage by weight：Ball shape silver powder I
10-25%, ball shape silver powder II 10-25%, flake silver powder 10-30%, glass dust 2-6%, organic carrier 10-30%, inorganic additive
0.1-4%。
In one embodiment, the glass dust is Bi2O3- SiO2Glass system.
In one embodiment, the glass dust also include Na, K, Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W,
One or more combination in Al, Pb, Sb, Se, Te, Br, I simple substance or oxide.
In one embodiment, the organic carrier is macromolecule resin and organic solvent.
In one embodiment, the macromolecule resin is ethyl cellulose, epoxy resin, polyurethane resin, rosin
One or more combination in resin, acrylic resin, polyamide.
In one embodiment, the organic solvent is terpinol, butyl carbitol, butyl carbitol acetate, alcohol
One or more combination in ester 12, DBE, aromatic hydrocarbons, aliphatic hydrocarbon.
In one embodiment, described organic carrier weight percent composition in back electrode silver paste is macromolecule resin
1-5%, organic solvent 9-35%.
In one embodiment, the inorganic additive be Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W, Al, Pb,
One or more combination in Sb, Se, Te simple substance or oxide.
Another object of the present invention is to provide the preparation method of rear electrode for crystal silicon solar battery silver paste, methods described
Including：Component proportion according to claim 1, load weighted glass dust and organic carrier are fitted into ball-grinding machine, pressed
Material：Zirconium ball=1：Filtering and discharging after 1 ratio addition zirconium ball, progress 15~24 hours mixing, ball-milling treatments to fineness≤7 μm, then and
Ball shape silver powder I, ball shape silver powder II, flake silver powder and inorganic additive mixing are passed through below three-high mill rolling to fineness≤7 μm,
Obtain rear electrode for crystal silicon solar battery silver paste.
Compared with prior art, advantageous effects of the invention are：The present invention passes through the ball from two kinds of different-grain diameters
The flake silver powder of shape silver powder and certain particle diameter and the Bi containing metal simple-substance or oxide2O3- SiO2The glass of glass system
Powder, inorganic additive, by controlling the proportioning of silver powder, glass dust, inorganic additive, the back electrode silver paste of preparation is with higher
Ageing resistace, high adhesion force and reliability, soldering resistance is good and suitable automatic soldering technique.
The above-mentioned of the application and other features, aspect and advantage is more readily understood with reference to described further below.
Embodiment
Unless otherwise defined, all technologies used herein and scientific terminology have and the common skill of art of the present invention
The identical implication that art personnel are generally understood that.When there is contradiction, the definition in this specification is defined.
As used herein term " by ... prepare " it is synonymous with "comprising".Term "comprising" used herein, " comprising ",
" having ", " containing " or its any other deformation, it is intended that cover including for non-exclusionism.For example, the combination comprising listed elements
Thing, step, method, product or device are not necessarily limited to those key elements, but can include not expressly listed other key elements or
Such a composition, step, method, product or the intrinsic key element of device.
Conjunction " Consists of " excludes any key element do not pointed out, step or component.If be used in claim, this
Phrase will make claim be closed, it is not included the material in addition to materials of those descriptions, but relative normal
Except rule impurity.When being rather than immediately following in the clause that phrase " Consists of " appears in claim main body after theme,
It is only limited to the key element described in the clause；Other key elements are not excluded outside as the overall claim.
Equivalent, concentration or other values or parameter are excellent with scope, preferred scope or a series of upper limit preferred values and lower limit
During the Range Representation that choosing value is limited, this, which is appreciated that, specifically discloses by any range limit or preferred value and any scope
All scopes that any pairing of lower limit or preferred value is formed, regardless of whether whether the scope separately discloses.For example, when open
During scope " 1 to 5 ", described scope should be interpreted as including scope " 1 to 4 ", " 1 to 3 ", " 1-2 ", " 1-2 and 4-5 ",
" 1-3 and 5 " etc..When number range is described herein, unless otherwise indicated, otherwise the scope be intended to include its end value with
All integers and fraction within the range.
In addition, the indefinite article " one kind " and " one " before key element of the present invention or component are to key element or the quantitative requirement of component
(i.e. occurrence number) unrestriction.Therefore " one " or " one kind " should be read as including one or at least one, and odd number
The key element or component of form also include plural form, unless the quantity substantially refers to singulative.
In order to solve the above problems, the invention provides a kind of rear electrode for crystal silicon solar battery silver paste, the back of the body electricity
Pole silver paste includes each component of following percentage by weight：The 5-30% of ball shape silver powder I, ball shape silver powder II 5-30%, flake silver powder 5-
30%, glass dust 2-6%, organic carrier 10-40%, inorganic additive 0.1-4%；Wherein, the average grain diameter D of the ball shape silver powder I50
For 100-500nm, the average grain diameter D of the ball shape silver powder II50For 0.5-1.0 μm, the average grain diameter D of the flake silver powder50For
0.5-1.0μm。
It is preferably carried out in one kind in mode, the back electrode silver paste includes each component of following percentage by weight：It is spherical
The 10-25% of silver powder I, ball shape silver powder II 10-25%, flake silver powder 10-30%, glass dust 2-6%, organic carrier 10-30% are inorganic to add
Plus agent 0.1-4%.
It is preferably carried out in one kind in mode, the glass dust is Bi2O3- SiO2Glass system.
Be preferably carried out in one kind in mode, the glass dust also include Na, K, Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr,
One or more combination in Mo, W, Al, Pb, Sb, Se, Te, Br, I simple substance or oxide.
It is preferably carried out in one kind in mode, the organic carrier is macromolecule resin and organic solvent.
It is preferably carried out in one kind in mode, the macromolecule resin is ethyl cellulose, epoxy resin, polyurethane tree
One or more combination in fat, rosin resin, acrylic resin, polyamide；Preferably, the macromolecule resin is second
Base cellulose, epoxy resin, polyurethane resin, rosin resin.
It is preferably carried out in one kind in mode, the organic solvent is terpinol, butyl carbitol, butyl carbitol acetic acid
One or more combination in ester, alcohol ester 12, DBE, aromatic hydrocarbons, aliphatic hydrocarbon；Preferably, terpinol, butyl carbitol, butyl card must
One or more combination in alcohol acetate, alcohol ester 12, DBE.
It is preferably carried out in one kind in mode, the described organic carrier weight percent composition in back electrode silver paste is high score
Subtree fat 1-5%, organic solvent 9-35%.
Be preferably carried out in one kind in mode, the inorganic additive be Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W,
One or more combination in Al, Pb, Sb, Se, Te simple substance or oxide.
Another object of the present invention is to provide the preparation method of rear electrode for crystal silicon solar battery silver paste, methods described
Including：Component proportion according to claim 1, load weighted glass dust and organic carrier are fitted into ball-grinding machine, pressed
Material：Zirconium ball=1：Filtering and discharging after 1 ratio addition zirconium ball, progress 15~24 hours mixing, ball-milling treatments to fineness≤7 μm, then and
Ball shape silver powder I, ball shape silver powder II, flake silver powder and inorganic additive mixing are passed through below three-high mill rolling to fineness≤7 μm,
Obtain rear electrode for crystal silicon solar battery silver paste.
Embodiment：
A kind of embodiment 1, rear electrode for crystal silicon solar battery silver paste, the back electrode silver paste includes following weight hundred
Divide each component of ratio：The 5-30% of ball shape silver powder I, ball shape silver powder II 5-30%, flake silver powder 5-30%, glass dust 2-6%, organic carrier
10-40%, inorganic additive 0.1-4%；Wherein, the average grain diameter D of the ball shape silver powder I50For 100-500nm, the spherical silver
The average grain diameter D of powder II50For 0.5-1.0 μm, the average grain diameter D of the flake silver powder50For 0.5-1.0 μm.
Embodiment 2, identical with embodiment 1, different places are that the back electrode silver paste includes following weight percent
The each component of ratio：The 10-25% of ball shape silver powder I, ball shape silver powder II 10-25%, flake silver powder 10-30%, glass dust 2-6%, there is airborne
Body 10-30%, inorganic additive 0.1-4%.
Embodiment 3, identical with embodiment 1, different places is that the glass dust is Bi2O3- SiO2Glass system.
Embodiment 4, identical with embodiment 3, different places are, the glass dust also include Na, K, Mg, Ca, Sr,
One or more combination in Ba, Zr, Nb, Ta, Cr, Mo, W, Al, Pb, Sb, Se, Te, Br, I simple substance or oxide.
Embodiment 5, identical with embodiment 1, different places are that the organic carrier is macromolecule resin and organic
Solvent.
Embodiment 6, identical with embodiment 5, different places are that the macromolecule resin is ethyl cellulose, ring
One or more combination in oxygen tree fat, polyurethane resin, rosin resin, acrylic resin, polyamide.
Embodiment 7, identical with embodiment 5 or 6, different places are that the organic solvent is terpinol, butyl card
One or more combination that must be in alcohol, butyl carbitol acetate, alcohol ester 12, DBE, aromatic hydrocarbons, aliphatic hydrocarbon.
Embodiment 8, identical with embodiment 7, different places are that described organic carrier is heavy in back electrode silver paste
It is macromolecule resin 1-5%, organic solvent 9-35% to measure percentage composition.
Embodiment 9, identical with embodiment 1, different places are, the inorganic additive be Mg, Ca, Sr, Ba,
One or more combination in Zr, Nb, Ta, Cr, Mo, W, Al, Pb, Sb, Se, Te simple substance or oxide.
Embodiment 10, the preparation method of rear electrode for crystal silicon solar battery silver paste, it is characterised in that methods described bag
Include：Component proportion according to claim 1, load weighted glass dust and organic carrier is fitted into ball-grinding machine, by material：
Zirconium ball=1：1 ratio adds zirconium ball, carries out filtering and discharging after 15~24 hours mixing, ball-milling treatments to fineness≤7 μm, then and ball
Shape silver powder I, ball shape silver powder II, flake silver powder and inorganic additive mixing are by below three-high mill rolling to fineness≤7 μm, obtaining
Obtain rear electrode for crystal silicon solar battery silver paste.
The present invention is specifically described below by embodiment.It is necessarily pointed out that, following examples are only used
In the invention will be further described, it is impossible to be interpreted as limiting the scope of the invention, professional and technical personnel in the field
Some the nonessential modifications and adaptations made according to the content of foregoing invention, still fall within protection scope of the present invention.
In addition, if without other explanations, raw materials used is all commercially available.
Rear electrode for crystal silicon solar battery silver paste component and proportioning, using first by glass dust and organic carrier loading ball milling
In equipment, by material：Zirconium ball=1：1 ratio adds zirconium ball, filtered after mixing, ball-milling treatment to fineness≤7 μm within 15~24 hours
Discharging, then with the mixing of ball shape silver powder I, ball shape silver powder II, flake silver powder and inorganic additive by three-high mill rolling to fineness
Less than≤7 μm, obtain rear electrode for crystal silicon solar battery silver paste.
First choice, sketches the basic scheme of material prescription of the present invention：A kind of rear electrode for crystal silicon solar battery silver paste, it is described
Back electrode silver paste includes each component of following percentage by weight：The 5-30% of ball shape silver powder I, the 5-30% of ball shape silver powder II, flake silver powder
5-30%, glass dust 2-6%, organic carrier 10-40%, inorganic additive 0.1-4%.
Embodiment 1-10
A kind of rear electrode for crystal silicon solar battery silver paste, it is formulated No. 1-10 formula according to table 1（1-10 is corresponded to respectively
Embodiment）, adjust by component, ball milling, good dispersion, the homogeneous main material of composition can be obtained after the process processing such as rolling.
Described in formula；The average grain diameter D of the ball shape silver powder I50For 100-500nm, the average grain diameter D of the ball shape silver powder II50For
0.5-1.0 μm, the average grain diameter D of the flake silver powder50For 0.5-1.0 μm；The glass dust is Bi2O3- SiO2Glass system；
The glass dust also includes Na, K, Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W, Al, Pb, Sb, Se, Te, Br, I simple substance or oxygen
One or more combination in compound；Macromolecule resin is ethyl cellulose, epoxy resin, polyurethane tree in the organic carrier
One or more combination in fat, rosin resin, acrylic resin, polyamide；Organic solvent is in the organic carrier
One or more combination in terpinol, butyl carbitol, butyl carbitol acetate, alcohol ester 12, DBE, aromatic hydrocarbons, aliphatic hydrocarbon；
The inorganic additive is one in Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W, Al, Pb, Sb, Se, Te simple substance or oxide
Plant or several combinations.Filtering and discharging after glass dust and organic carrier are reached into certain fineness through ball milling, then with silver powder material
Rolling is fully ground using three-roll grinder after material, inorganic additive are well mixed, certain fineness is reached.
The silver electrode paste as made from above-mentioned formula, passes through silk-screen printing technique formation crystal silicon solar energy battery cell piece
（125 × 125 specifications）Back electric field silver electrodes, and carry out performance test, the silicon solar cell of gained is functional,
Test result is shown in Table 2.
Table 1
Table 2
Foregoing example is merely illustrative, some features of the feature for explaining the present invention.Appended claim
The scope as wide as possible for requiring to be contemplated that is intended to, and embodiments as presented herein is only according to all possible embodiment
Combination selection embodiment explanation.Therefore, the purpose of applicant is appended claim not by the explanation present invention
Feature example selectional restriction.And the progress in science and technology by formed language performance it is inaccurate due to and not
The possible equivalent or son being presently considered are replaced, and these changes should also be interpreted by appended in the conceived case
Claim is covered.
Claims (3)
1. a kind of rear electrode for crystal silicon solar battery silver paste, it is characterised in that the back electrode silver paste includes following weight hundred
Divide each component of ratio：Ball shape silver powder I 10%, ball shape silver powder II 20%, flake silver powder 15%, glass dust 4%, organic carrier
25%, inorganic additive 1%；Wherein, the average grain diameter D of the ball shape silver powder I50For 100-500nm, the ball shape silver powder II
Average grain diameter D50For 0.5-1.0 μm, the average grain diameter D of the flake silver powder50For 0.5-1.0 μm；The glass dust is Bi2O3-
SiO2Glass system, the glass dust also include Na, K, Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W, Al, Pb, Sb, Se,
One or more combination in Te, Br, I simple substance or oxide；The organic carrier be macromolecule resin and organic solvent, it is described
Organic carrier in back electrode silver paste weight percent composition be macromolecule resin 1-5%, organic solvent 9-35%；It is described inorganic
Additive is the one or more in Mg, Ca, Sr, Ba, Zr, Nb, Ta, Cr, Mo, W, Al, Pb, Sb, Se, Te simple substance or oxide
Combination.
2. rear electrode for crystal silicon solar battery silver paste according to claim 1, it is characterised in that the macromolecule resin
For the one or more in ethyl cellulose, epoxy resin, polyurethane resin, rosin resin, acrylic resin, polyamide
Combination.
3. rear electrode for crystal silicon solar battery silver paste according to claim 1, it is characterised in that the organic solvent is
One or more combination in terpinol, butyl carbitol, butyl carbitol acetate, alcohol ester 12, DBE, aromatic hydrocarbons, aliphatic hydrocarbon.
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| CN107680709A (en) * | 2016-08-01 | 2018-02-09 | 江苏正能电子科技有限公司 | A kind of crystal silicon solar energy battery positive silver paste |
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| CN109949966B (en) * | 2019-03-26 | 2021-03-16 | 浙江光达电子科技有限公司 | High-reliability PERC crystalline silicon solar cell back silver conductive paste and preparation process thereof |
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| CN112908511A (en) * | 2021-04-14 | 2021-06-04 | 上海日御新材料科技有限公司 | Silver conductor paste for battery back electrode |
| CN113593749B (en) * | 2021-07-26 | 2023-03-14 | 浙江光达电子科技有限公司 | PERC crystalline silicon solar cell main grid slurry and preparation method thereof |
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