CN106782759A - A kind of back side silver paste for PERC crystal silicon solar energy batteries and preparation method thereof - Google Patents
A kind of back side silver paste for PERC crystal silicon solar energy batteries and preparation method thereof Download PDFInfo
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- CN106782759A CN106782759A CN201710035049.4A CN201710035049A CN106782759A CN 106782759 A CN106782759 A CN 106782759A CN 201710035049 A CN201710035049 A CN 201710035049A CN 106782759 A CN106782759 A CN 106782759A
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- back side
- crystal silicon
- silver paste
- solar energy
- silicon solar
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 68
- 239000004332 silver Substances 0.000 title claims abstract description 68
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 45
- 239000010703 silicon Substances 0.000 title claims abstract description 45
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000013078 crystal Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 title claims abstract 15
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 title claims abstract 15
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 title claims abstract 15
- 239000000654 additive Substances 0.000 claims abstract description 31
- 230000000996 additive effect Effects 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 43
- 239000001856 Ethyl cellulose Substances 0.000 claims description 31
- 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 31
- 229920001249 ethyl cellulose Polymers 0.000 claims description 31
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 31
- 239000003960 organic solvent Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 23
- IDQBJILTOGBZCR-UHFFFAOYSA-N 1-butoxypropan-1-ol Chemical compound CCCCOC(O)CC IDQBJILTOGBZCR-UHFFFAOYSA-N 0.000 claims description 15
- 239000004411 aluminium Substances 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 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 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 11
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 10
- 229910052593 corundum Inorganic materials 0.000 claims description 10
- 239000005308 flint glass Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 10
- 229910052681 coesite Inorganic materials 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052682 stishovite Inorganic materials 0.000 claims description 8
- 229910052905 tridymite Inorganic materials 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 6
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 6
- 235000011613 Pinus brutia Nutrition 0.000 claims description 6
- 241000018646 Pinus brutia Species 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000002242 deionisation method Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000006259 organic additive Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 4
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- LJCFOYOSGPHIOO-UHFFFAOYSA-N antimony pentoxide Inorganic materials O=[Sb](=O)O[Sb](=O)=O LJCFOYOSGPHIOO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 claims description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims description 2
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000001465 metallisation Methods 0.000 claims 1
- 238000002161 passivation Methods 0.000 abstract description 19
- 229910021419 crystalline silicon Inorganic materials 0.000 abstract description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical group CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010954 inorganic particle Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 241000409201 Luina Species 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 230000011712 cell development Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 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
- 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
-
- 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
- H01L31/022441—Electrode arrangements specially adapted for back-contact 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photovoltaic Devices (AREA)
- Conductive Materials (AREA)
Abstract
The invention discloses a kind of back side silver paste for PERC crystal silicon solar energy batteries, it is made up of the raw material of following proportion by weight：40~70 parts of conducting metal, 1~10 part of inorganic bond, 20~50 parts of organic carrier, 1~10 part of additive.The back side silver paste is printed in the backside passivation film of crystalline silicon, and after drying sintering, the slurry does not burn backside passivation film, overcomes traditional back side silver paste and the shortcoming declined so as to the PERC crystal silicon solar energy batteries electrical property for causing is damaged to backside passivation film.The invention also discloses the preparation method of the above-mentioned back side silver paste for PERC crystal silicon solar energy batteries.
Description
Technical field
The invention belongs to back side silver paste technical field, and in particular to a kind of back side for PERC crystal silicon solar energy batteries
Silver paste and preparation method thereof.
Background technology
Solar radiant energy is directly converted to electric energy by solar power generation, is the conversion ring to solar energy in all clean energy resourcies
Save at least, using most direct mode.Because solar cell is than the high cost of conventional electric power generation, makes it that application to be installed and receive necessarily
Limitation, main stream can not be still turned within following a period of time, so the photoelectric transformation efficiency and drop of raising solar cell
The cost of low solar cell is the Main way of following crystal-silicon solar cell development.
PERC (Passivated Emitter and Rear Contact, passivation emitter and rear-face contact) sun electricity
Pond is a kind of specific type of conventional solar cell, and it is mainly characterized by the front side emitter pole of solar cell and the back side all
With passivation film structure.The passivating film that wherein front side emitter is extremely gone up is used as antireflection layer, and the passivating film on the back side is by perforation
Contact is formed, for reducing back side recombination rate to improve the conversion efficiency of solar cell.Contrast conventional solar cell, PERC is too
The conversion efficiency in positive electricity pond can lift 0.5~1%, be a kind of solar battery structure for having the potentiality that grow a lot.
As conventional solar battery structure, PERC solar cells are also with the negative pole on their front and at it
The back side on positive pole.Generally on the passivating film of front side of silicon wafer silk-screen printing and front side silver paste is dried as solar cell
Negative pole.Silk-screen printing and dry back side silver paste and aluminium paste successively on the passivating film of silicon chip back side perforation, and back side silver paste with
Aluminium paste overlaps region.After sintered, back side silver paste is presented alloy state with the overlapping region of aluminium paste, realizes and is electrically connected
Connect.In order to farthest retain the passivation effect of backside passivation film, it is often desirable that back side silver paste should not have grills thoroughly passivating film
Ability or only there is the ability of passivating film poorly grilled thoroughly, i.e., after drying sintering, back side silver paste does not burn backside passivation film.
The content of the invention
First technical problem to be solved by this invention is to provide a kind of back of the body for PERC crystal silicon solar energy batteries
Face silver paste, the back side silver paste is printed in the backside passivation film of crystalline silicon, and after drying sintering, the slurry does not burn passivating back
Film, overcomes traditional back side silver paste and PERC crystal silicon solar energy battery electrical properties so as to cause is damaged to backside passivation film
The shortcoming of decline.
Second technical problem to be solved by this invention is to provide the above-mentioned back of the body for PERC crystal silicon solar energy batteries
The preparation method of face silver paste, the preparation method concise in technology, low cost can be mutually compatible with existing process.
First technical problem of the invention is achieved by the following technical solution：One kind is used for PERC crystalline silicons too
The back side silver paste of positive energy battery, is made up of the raw material of following proportion by weight：40~70 parts of conducting metal, inorganic bond 1~
10 parts, 20~50 parts of organic carrier, 1~10 part of additive.
Further, the proportion by weight of each raw material is preferably：45~65 parts of conducting metal, 2~6 parts of inorganic bond,
25~45 parts of organic carrier, 1~10 part of additive.
Conducting metal of the present invention includes silver powder and/or silver alloy.
In silver powder, Argent grain can be spherical silver powder, flake silver powder, crystallite silver powder and their mixture composition.
The granularity of silver is not limited, and in a preferred embodiment, the silver powder is spherical silver powder and crystallite silver powder
Mixture, wherein the D50 of spherical silver powder is at 0.1~5 μm, preferably 0.5~3 μm, crystallite silver powder is nanoscale, its D50
In 10~200nm, preferably 20~100nm.
In terms of the silver paste gross mass of the back side, silver powder can be present in the silver paste of the back side with 40~70% weight/mass percentage composition,
It is preferred that 45~65% weight/mass percentage composition.
For silver alloy, silver can constitute alloy, the weight/mass percentage composition of silver with one or more other metals such as copper
More than 99%.
Further, can also be with addition to silver powder and/or silver alloy in the conducting metal of the back side silver paste in the present invention
One or more a small amount of other granular metal, optional other granular metals include copper powder, palladium powder, nickel powder, cobalt powder or
Person's aluminium powder.
In a preferred embodiment, described conducting metal is silver powder and aluminium powder, wherein the quality percentage of silver powder
Content is 97~99%, and the weight/mass percentage composition of aluminium powder is 1~3%.
Inorganic bond of the present invention is preferably frit.
The frit is selected from lead-less glasses material or flint glass material.
The softening point temperature of wherein described lead-less glasses material be 500~800 DEG C, its by following weight/mass percentage composition original
Material composition：Bi2O340~73%, SiO210~40%, Al2O30~15%, B2O32~30%.
The softening point temperature of described flint glass material be 450~650 DEG C, its by following weight/mass percentage composition raw material group
Into：PbO 33~57%, SiO215~29%, Al2O31~13%, CuO 1~15% and MnO26~10%.
In terms of the silver paste gross mass of the back side, the weight/mass percentage composition of inorganic bond is 1~10%, preferably 2~6%.
The wherein D50 of frit is 1~5 μm, preferably 1~3 μm.
Inorganic bond functions as a kind of inorganic bond medium so that various inorganic particles are sintered together, and
Combine closely in silicon chip surface, this is the committed step for influenceing electrode adhesion.
The organic carrier includes the mixed solution of ethyl cellulose and organic solvent, wherein ethyl cellulose and organic molten
The proportion by weight of agent is 1：9~10.
The organic solvent is made up of the raw material of following weight/mass percentage composition：Terpinol 10~60%, butyl carbitol 20
~70%, butyl carbitol acetate 10~15% and propandiol butyl ether 1~5%.
Organic carrier of the present invention is preferably prepared by the following method acquisition：Ethyl cellulose is added to organic solvent
In terpinol, butyl carbitol, butyl carbitol acetate and propandiol butyl ether, using heating using microwave to 80~120 DEG C, Bian Jia
Hot side is stirred to ethyl cellulose after being completely dissolved and obtains organic carrier, is used after being cooled to room temperature.
In terms of the silver paste gross mass of the back side, the weight/mass percentage composition of organic carrier is 20~50%, preferably 25~45%.
The effect of organic carrier is to provide good applying performance to silver paste, including：It is the Investigation of stabilized dispersion of nano of inorganic particle, suitable
When viscosity and thixotropy, the backside passivation film to silicon chip and inorganic particle provide appropriate wetability and with good
Drying Rates and good sintering character.
In the present invention, back side silver paste may include one or more inorganic additive or organic additive, to improve slurry
Overall performance.
Wherein organic additive can be one or more of wetting dispersing agent, thickener or levelling agent that market is commonly used, have
Machine additive can be present in the silver paste of the back side with 0~3% weight/mass percentage composition.
In the present invention, inorganic additive can be added with the adhesive force of strengthening slurry.
The inorganic additive can be selected from Al2O3、Bi2O3、PbO、Sb2O5、Fe2O3、Fe3O4、ZnO、CuO、Cu2O、MnO2、
Co2O3、Co3O4, NiO or can produce the metallic compound of listed metal oxide in sintering process.
In a preferred embodiment, the PbO of 0.1~3% weight/mass percentage composition can be contained in the silver paste of the back side.
Second technical problem of the invention is achieved by the following technical solution：Above-mentioned PERC crystal silicon solars
The preparation method of the back side silver paste of battery, comprises the following steps：
(1) inorganic bond is prepared：Choose inorganic bond each raw material, after mixing dry, regulation temperature be 1150~
1250 DEG C of 4~10h of melting, dry after deionization water quenching, then are processed through ball milling, drying and sieving, obtain inorganic bond；
(2) organic carrier is prepared：After each raw material of organic carrier is mixed, using heating using microwave to 80~120 DEG C, Bian Jia
Stir and obtain organic carrier to after being completely dissolved in hot side；
(3) conducting metal, inorganic bond, organic carrier and additive are chosen, again through pre-dispersed treatment after machinery mixing,
Obtain pastel stand-by；
(4) pastel is carried out using grinder after pine rolls and tightly roll, that is, obtaining the back of the body of PERC crystal silicon solar energy batteries
Face silver paste.
The application method of the back side silver paste of the PERC crystal silicon solar energy batteries in the present invention, comprises the following steps：
(1) crystal silicon chip is chosen, having on the front of the crystal silicon chip has perforation on antireflection layer and its back side
Passivation layer；
(2) back side that back side silver paste is printed on the crystal silicon chip is chosen, the silver back of the body is formed on the passivation layer of the perforation
Electrode；
(3) silver-colored back electrode is sintered, temperature during sintering is 700~900 DEG C, the silver paste formed after sintering is not
Burn the backside passivation layer.
Wherein sinter preferably is carried out with common sintering, common sintering together with the back side aluminium paste for being printed to crystal silicon chip and
Front metal slurry is together forming aluminium backplate and front metal electrode.
Compared with prior art, the present invention has advantages below：Back side silver paste in the present invention is low using inorganic bond
Activity glass powder, reduces the reaction with backside passivation film, has without the ability for grilling thoroughly passivating film or only and poorly grills thoroughly
After the ability of passivating film, i.e. drying sintering, back side silver paste does not burn backside passivation film, it is to avoid silver paste and silicon chip contact portion
A large amount of complex centres are formed, the open-circuit voltage of battery is improved, so as to improve the electrical property of battery.
Specific embodiment
The present invention is given specific description in each of the embodiments described below.These embodiments be all it is illustrative, not
The present invention is limited in any way.It will be understood by those skilled in the art that without departing from the spirit and scope of the invention
The details of technical solution of the present invention and form can be modified or replaced, but these modification and replacement each fall within it is of the invention
In protection domain.
Embodiment 1
The back side silver paste for PERC crystal silicon solar energy batteries that the present embodiment is provided, by the original of following proportion by weight
Material is made：55 parts of conducting metal, 3 parts of inorganic bond, 34 parts of organic carrier, 8 parts of additive.
Wherein conducting metal is silver powder, and silver powder is the mixture of spherical silver powder and crystallite silver powder, wherein the D50 of spherical silver powder
It it is 0.1~5 μm, crystallite silver powder is nanoscale, its D50 is 10~200nm.
Inorganic bond is lead-less glasses material, and the softening point temperature of lead-less glasses material is 500~800 DEG C, and it is by following matter
Measure the raw material composition of percentage composition：Bi2O345%th, SiO220%th, Al2O36%th, B2O329%.
The D50 of lead-less glasses material is 2~3 μm.
Mixed solution of the organic carrier including ethyl cellulose and organic solvent, wherein ethyl cellulose and organic solvent
Proportion by weight is 1：9.
Organic solvent is made up of the raw material of following weight/mass percentage composition：Terpinol 40%, butyl carbitol 44%, butyl card
Must alcohol acetate 15% and propandiol butyl ether 1%.
Organic carrier is prepared by the following method acquisition：Ethyl cellulose is added to organic solvent terpinol, butyl card
Must be heated while stirring fine to ethyl in alcohol, butyl carbitol acetate and propandiol butyl ether, using heating using microwave to 100 DEG C
Dimension element obtains organic carrier after being completely dissolved, and is cooled to room temperature stand-by.
Additive is inorganic additive, and inorganic additive is PbO.
The preparation method of the back side silver paste of the PERC crystal silicon solar energy batteries, comprises the following steps：
(1) inorganic bond is prepared：Each raw material of inorganic bond is chosen, in 120 DEG C of baking 1h of vacuum tank, regulation after mixing
Temperature is 1200 DEG C of melting 9h, is dried after deionization water quenching, then through ball milling 72h, is sieved after drying, obtain particle diameter 2~3 μm it
Between inorganic bond；
(2) organic carrier is prepared：Ethyl cellulose is added to organic solvent terpinol, butyl carbitol, butyl card must
In the mixed liquor of alcohol acetate and propandiol butyl ether, and by heating using microwave to 100 DEG C, heat while stirring to ethyl cellulose
Element obtains organic carrier after being completely dissolved, and is used after being cooled to room temperature, and the weight ratio of ethyl cellulose and organic solvent is 1：9；
(3) conducting metal, inorganic bond, organic carrier and additive are chosen and pour into mixing machinery in mechanical batch mixer,
Again through pre-dispersed treatment after mixing, mixture temperature is maintained at room temperature, obtains pastel stand-by；
(4) pre-dispersed pastel three-high mill pine is rolled one time, then progressively tight rolling 3 times, finally tightly roll 2 times and obtain
Back silver paste.
The application method of the back side silver paste of the PERC crystal silicon solar energy batteries, comprises the following steps：
(1) crystal silicon chip is chosen, having on the front of the crystal silicon chip has perforation on antireflection layer and its back side
Passivation layer；
(2) back side that back side silver paste is printed on the crystal silicon chip is chosen, the silver back of the body is formed on the passivation layer of the perforation
Electrode；
(3) silver-colored back electrode is sintered, temperature during sintering is 700~900 DEG C, the silver paste formed after sintering is not
Burn the backside passivation layer.
Embodiment 2
The back side silver paste for PERC crystal silicon solar energy batteries that the present embodiment is provided, by the original of following proportion by weight
Material is made：50 parts of conducting metal, 4 parts of inorganic bond, 30 parts of organic carrier, 6 parts of additive.
Conducting metal is silver powder and aluminium powder, and the wherein weight/mass percentage composition of silver powder is 98%, the weight/mass percentage composition of aluminium powder
It is 2%.
Inorganic bond is flint glass material, and the softening point temperature of flint glass material is 450~650 DEG C, and it is by following matter
Measure the raw material of percentage composition：PbO 45%, SiO225%th, Al2O36%th, CuO 15% and MnO29%.
The D50 of flint glass material is 1~5 μm.
Mixed solution of the organic carrier including ethyl cellulose and organic solvent, wherein ethyl cellulose and organic solvent
Proportion by weight is 1：9.5, organic solvent is made up of the raw material of following weight/mass percentage composition：Terpinol 35%, butyl carbitol
45%th, butyl carbitol acetate 15% and propandiol butyl ether 5%.
Organic carrier is prepared by the following method acquisition：Ethyl cellulose is added to organic solvent terpinol, butyl card
Using heating using microwave to 90 DEG C, must heat while stirring to ethyl cellulose in alcohol, butyl carbitol acetate and propandiol butyl ether
Element obtains organic carrier after being completely dissolved.
Additive is inorganic additive, and inorganic additive is PbO.
The preparation method of the back side silver paste of the PERC crystal silicon solar energy batteries, comprises the following steps：
(1) inorganic bond is prepared：Each raw material of inorganic bond is chosen, in 120 DEG C of baking 1h of vacuum tank, regulation after mixing
Temperature is 1200 DEG C of melting 5h, is dried after deionization water quenching, then through ball milling 36h, is sieved after drying, obtain particle diameter 1~3 μm it
Between inorganic bond；
(2) organic carrier is prepared：Ethyl cellulose is added to organic solvent terpinol, butyl carbitol, butyl card must
In the mixed liquor of alcohol acetate and propandiol butyl ether, and by heating using microwave to 90~110 DEG C, heat while stirring to ethyl
Cellulose obtains organic carrier after being completely dissolved, and is used after being cooled to room temperature, and the weight ratio of ethyl cellulose and organic solvent is
1：9.5；
(3) conducting metal, inorganic bond, organic carrier and additive are chosen and pour into mixing machinery in mechanical batch mixer,
Again through pre-dispersed treatment after mixing, mixture temperature is maintained at room temperature, obtains pastel stand-by；
(4) pre-dispersed pastel three-high mill pine is rolled one time, then progressively tight rolling 3 times, finally tightly roll 2 times and obtain
Back silver paste.
Embodiment 3
As different from Example 1, the back side silver paste for PERC crystal silicon solar energy batteries that the present embodiment is provided, by
The raw material of following proportion by weight is made：70 parts of conducting metal, 1 part of inorganic bond, 28 parts of organic carrier, 1 part of additive.
Conducting metal is silver alloy, and the weight/mass percentage composition of silver is more than 99% in silver-colored billon.
Inorganic bond is lead-less glasses material, and the softening point temperature of lead-less glasses material is 500~800 DEG C, and it is by following matter
Measure the raw material composition of percentage composition：Bi2O340%th, SiO240%th, B2O320%.
The D50 of lead-less glasses material is 2~3 μm.
Mixed solution of the organic carrier including ethyl cellulose and organic solvent, wherein ethyl cellulose and organic solvent
Proportion by weight is 1：9.
Organic solvent is made up of the raw material of following weight/mass percentage composition：Terpinol 10%, butyl carbitol 70%, butyl card
Must alcohol acetate 15% and propandiol butyl ether 5%.
Organic carrier is prepared by the following method acquisition：Ethyl cellulose is added to organic solvent terpinol, butyl card
Using heating using microwave to 80 DEG C, must heat while stirring to ethyl cellulose in alcohol, butyl carbitol acetate and propandiol butyl ether
Element obtains organic carrier after being completely dissolved.
Additive is organic additive, in wetting dispersing agent, thickener and levelling agent that organic additive is commonly used for market
One or more.
The preparation method that this is used for the back side silver paste of PERC crystal silicon solar energy batteries is as follows：
(1) inorganic bond is prepared：Each raw material of inorganic bond is chosen, is dried after mixing, regulation temperature is 1150 DEG C
Melting 10h, dries after deionization water quenching, then is processed through ball milling 72h, drying and sieving, obtains inorganic bond；
(2) organic carrier is prepared：After each raw material of organic carrier is mixed, using heating using microwave to 80 DEG C, in heating
Stirring obtains organic carrier to after being completely dissolved；
(3) conducting metal, inorganic bond, organic carrier and additive are chosen, again through pre-dispersed treatment after machinery mixing,
Obtain pastel stand-by；
(4) by pastel with carrying out using grinder after pine rolls and tightly roll, that is, obtaining back silver slurry.
Embodiment 4
As different from Example 1, the back side silver paste for PERC crystal silicon solar energy batteries that the present embodiment is provided, by
The raw material of following proportion by weight is made：40 parts of conducting metal, 10 parts of inorganic bond, 40 parts of organic carrier, 10 parts of additive.
Conducting metal is silver powder and aluminium powder, and the wherein weight/mass percentage composition of silver powder is 99%, the weight/mass percentage composition of aluminium powder
It is 1%.
Inorganic bond is flint glass material, and the softening point temperature of flint glass material is 450~650 DEG C, and it includes following
The raw material of weight/mass percentage composition：PbO 57%, SiO215%th, Al2O37%th, CuO 15% and MnO26%.
The D50 of flint glass material is 3~5 μm.
Mixed solution of the organic carrier including ethyl cellulose and organic solvent, wherein ethyl cellulose and organic solvent
Proportion by weight is 1：10.
Organic solvent is made up of the raw material of following weight/mass percentage composition：Terpinol 60%, butyl carbitol 20%, butyl card
Must alcohol acetate 15% and propandiol butyl ether 5%.
Organic carrier is prepared by the following method acquisition：Ethyl cellulose is added to organic solvent terpinol, butyl card
Must be heated while stirring fine to ethyl in alcohol, butyl carbitol acetate and propandiol butyl ether, using heating using microwave to 120 DEG C
Dimension element obtains organic carrier after being completely dissolved.
Additive is inorganic additive, and inorganic additive is Al2O3、Bi2O3, PbO and Sb2O5(proportion by weight is 1:1:
1:1) mixture.
The preparation method of the back side silver paste of the PERC crystal silicon solar energy batteries, comprises the following steps：
(1) inorganic bond is prepared：Each raw material of inorganic bond is chosen, in 120 DEG C of baking 1h of vacuum tank, regulation after mixing
Temperature is 1250 DEG C of melting 4h, is dried after deionization water quenching, then through ball milling 36h, is sieved after drying, obtain particle diameter 1~3 μm it
Between inorganic bond；
(2) organic carrier is prepared：Ethyl cellulose is added to organic solvent terpinol, butyl carbitol, butyl card must
In the mixed liquor of alcohol acetate and propandiol butyl ether, and by heating using microwave to 120 DEG C, heat while stirring to ethyl cellulose
Element obtains organic carrier after being completely dissolved, and is used after being cooled to room temperature, and the weight ratio of ethyl cellulose and organic solvent is 1：10；
(3) conducting metal, inorganic bond, organic carrier and additive are chosen and pour into mixing machinery in mechanical batch mixer,
Again through pre-dispersed treatment after mixing, mixture temperature is maintained at room temperature, obtains pastel stand-by；
(4) pre-dispersed pastel three-high mill pine is rolled one time, then progressively tight rolling 3 times, finally tightly roll 2 times and obtain
Back silver paste.
A part of specific embodiment is enumerated above, and the present invention will be described, it is necessary to it is pointed out here that be the specifically real above
Apply example and be served only for that the invention will be further described, do not represent limiting the scope of the invention.Other people are according to the present invention
Some the nonessential modifications and adjustment made still fall within protection scope of the present invention.
Claims (10)
1. a kind of back side silver paste for PERC crystal silicon solar energy batteries, it is characterized in that by the raw material system of following proportion by weight
Into：40~70 parts of conducting metal, 1~10 part of inorganic bond, 20~50 parts of organic carrier, 1~10 part of additive.
2. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 1, it is characterized in that each raw material
Proportion by weight is：45~65 parts of conducting metal, 2~6 parts of inorganic bond, 25~45 parts of organic carrier, additive 1~10
Part.
3. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 1 and 2, it is characterized in that：It is described
Conducting metal include silver powder and/or silver alloy, the silver powder is the mixture of spherical silver powder and crystallite silver powder, wherein spherical silver
The D50 of powder is 0.1~5 μm, and the crystallite silver powder is nanoscale, and its D50 is 10~200nm；Silver in the silver alloy
Weight/mass percentage composition is more than 99%.
4. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 3, it is characterized in that：Described leads
Electric metal also includes copper powder, palladium powder, nickel powder, cobalt powder or aluminium powder.
5. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 4, it is characterized in that：Described leads
Electric metal is silver powder and aluminium powder, and the wherein weight/mass percentage composition of silver powder is 97~99%, the weight/mass percentage composition of aluminium powder for 1~
3%.
6. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 1, it is characterized in that：It is described inorganic
Adhesive is frit, and the frit is lead-less glasses material or flint glass material, wherein the softening of described lead-less glasses material
Point temperature is 500~800 DEG C, and it is made up of the raw material of following weight/mass percentage composition：Bi2O340~73%, SiO210~
40%th, Al2O30~15%, B2O32~30%；The softening point temperature of described flint glass material be 450~650 DEG C, its by
The raw material composition of following weight/mass percentage composition：PbO33~57%, SiO215~29%, Al2O31~13%, CuO 1~15%
And MnO26~10%；The D50 of wherein described frit is 1~5 μm.
7. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 1, it is characterized in that：It is described organic
Carrier includes the mixed solution of ethyl cellulose and organic solvent, and the proportion by weight of wherein ethyl cellulose and organic solvent is
1：9~10, the organic solvent is made up of the raw material of following weight/mass percentage composition：Terpinol 10~60%, butyl carbitol 20
~70%, butyl carbitol acetate 10~15% and propandiol butyl ether 1~5%.
8. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 7, it is characterized in that：It is described organic
Carrier is prepared by the following method acquisition：Ethyl cellulose is added to organic solvent terpinol, butyl carbitol, butyl card must
In alcohol acetate and propandiol butyl ether, using heating using microwave to 80~120 DEG C, heat while stirring completely molten to ethyl cellulose
Organic carrier is obtained after solution.
9. the back side silver paste for PERC crystal silicon solar energy batteries according to claim 1, it is characterized in that：The addition
Agent is inorganic additive and/or organic additive, and the inorganic additive is Al2O3、Bi2O3、PbO、Sb2O5、Fe2O3、Fe3O4、
ZnO、CuO、Cu2O、MnO2、Co2O3、Co3O4, NiO or can produce the metallization of listed metal oxide in sintering process
Compound；The organic additive is one or more in the conventional wetting dispersing agent in market, thickener and levelling agent.
10. the preparation method of the back side silver paste of the PERC crystal silicon solar energy batteries described in any one of claim 1-9, its feature
It is to comprise the following steps：
(1) inorganic bond is prepared：Each raw material of inorganic bond is chosen, is dried after mixing, regulation temperature is 1150~1250
DEG C 4~10h of melting, dries after deionization water quenching, then is processed through ball milling, drying and sieving, obtains inorganic bond；
(2) organic carrier is prepared：After each raw material of organic carrier is mixed, using heating using microwave to 80~120 DEG C, in heating
Stirring obtains organic carrier to after being completely dissolved；
(3) conducting metal, inorganic bond, organic carrier and additive are chosen, again through pre-dispersed treatment after machinery mixing, must be pasted
Shape thing is stand-by；
(4) pastel is carried out using grinder after pine rolls and tightly roll, that is, obtaining the back silver of PERC crystal silicon solar energy batteries
Slurry.
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| CN107564601A (en) * | 2017-08-28 | 2018-01-09 | 广州市儒兴科技开发有限公司 | A kind of backplate slurry for two-sided PERC solar cells and preparation method thereof |
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| CN109300573A (en) * | 2018-09-27 | 2019-02-01 | 海宁市瑞银科技有限公司 | PERC low silver-colored back silver paste containing high adhesion force used for solar batteries and preparation method thereof |
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| CN109659065A (en) * | 2018-12-14 | 2019-04-19 | 杭州华光焊接新材料股份有限公司 | A kind of dielectric ceramic capacitor silver paste |
| CN109785994A (en) * | 2018-12-29 | 2019-05-21 | 广州市儒兴科技开发有限公司 | A kind of PERC battery backplane slurry and preparation method thereof |
| CN109785994B (en) * | 2018-12-29 | 2020-05-19 | 广州市儒兴科技开发有限公司 | PERC battery back electrode slurry and preparation method thereof |
| CN111403077A (en) * | 2019-09-04 | 2020-07-10 | 杭州正银电子材料有限公司 | General back electrode silver paste for PERC single-sided double-sided battery and preparation method |
| CN111403077B (en) * | 2019-09-04 | 2022-04-19 | 杭州正银电子材料有限公司 | General back electrode silver paste for PERC single-sided double-sided battery and preparation method |
| CN112562883A (en) * | 2020-12-01 | 2021-03-26 | 广州市儒兴科技开发有限公司 | Electrode paste in contact with P + emitter of N-type solar cell |
| WO2022116646A1 (en) * | 2020-12-01 | 2022-06-09 | 广州市儒兴科技开发有限公司 | Electrode slurry that makes contact with p+ emitter of n-type solar cell |
| CN112562883B (en) * | 2020-12-01 | 2022-10-28 | 广州市儒兴科技开发有限公司 | Electrode slurry contacted with N-type solar cell p + emitter |
| CN113035410A (en) * | 2021-03-29 | 2021-06-25 | 江西核工业兴中新材料有限公司 | PERC back silver paste for high-welding-tension low-activity crystalline silicon solar cell and preparation method thereof |
| CN113643842A (en) * | 2021-08-05 | 2021-11-12 | 江苏正能电子科技有限公司 | Doped tunneling type back silver, preparation method thereof and PERC battery comprising doped tunneling type back silver |
| CN113744914A (en) * | 2021-09-01 | 2021-12-03 | 江苏正能电子科技有限公司 | High-temperature silver paste with Ag-On-Al structure for PERC and preparation method thereof |
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