CN107331433A - A kind of passivation emitter solar cell front side silver paste - Google Patents
A kind of passivation emitter solar cell front side silver paste Download PDFInfo
- Publication number
- CN107331433A CN107331433A CN201710522213.4A CN201710522213A CN107331433A CN 107331433 A CN107331433 A CN 107331433A CN 201710522213 A CN201710522213 A CN 201710522213A CN 107331433 A CN107331433 A CN 107331433A
- Authority
- CN
- China
- Prior art keywords
- silver paste
- front side
- solar cell
- inorganic binder
- cell front
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000004332 silver Substances 0.000 title claims abstract description 60
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 60
- 238000002161 passivation Methods 0.000 title claims abstract description 27
- 239000011230 binding agent Substances 0.000 claims abstract description 26
- 238000005245 sintering Methods 0.000 claims abstract description 26
- 239000002562 thickening agent Substances 0.000 claims abstract description 17
- 239000003960 organic solvent Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- -1 sodium hexafluoroantimonate Chemical compound 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 239000000292 calcium oxide Substances 0.000 claims abstract description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 19
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 229920002396 Polyurea Polymers 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052681 coesite Inorganic materials 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 229910052682 stishovite Inorganic materials 0.000 claims description 8
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052905 tridymite Inorganic materials 0.000 claims description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 7
- MRPWWVMHWSDJEH-UHFFFAOYSA-N antimony telluride Chemical compound [SbH3+3].[SbH3+3].[TeH2-2].[TeH2-2].[TeH2-2] MRPWWVMHWSDJEH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052785 arsenic Inorganic materials 0.000 claims description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- 125000005313 fatty acid group Chemical group 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 238000000518 rheometry Methods 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 2
- 235000004443 Ricinus communis Nutrition 0.000 claims 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 claims 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims 1
- 239000008159 sesame oil Substances 0.000 claims 1
- 235000011803 sesame oil Nutrition 0.000 claims 1
- 238000009766 low-temperature sintering Methods 0.000 abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 229910052710 silicon Inorganic materials 0.000 abstract description 4
- 239000010703 silicon Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 9
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 9
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 9
- 239000000306 component Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 5
- 239000004359 castor oil Substances 0.000 description 3
- 235000019438 castor oil Nutrition 0.000 description 3
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- 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 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 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 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 2
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 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 description 2
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910017982 Ag—Si Inorganic materials 0.000 description 1
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 101100296544 Caenorhabditis elegans pbo-5 gene Proteins 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- XNRNVYYTHRPBDD-UHFFFAOYSA-N [Si][Ag] Chemical group [Si][Ag] XNRNVYYTHRPBDD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- YADSGOSSYOOKMP-UHFFFAOYSA-N lead dioxide Inorganic materials O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000037230 mobility Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Conductive Materials (AREA)
Abstract
The invention discloses a kind of passivation emitter solar cell front side silver paste, the key component of front side silver paste is organic carrier, inorganic binder, silver powder and sintering aidses；Wherein organic carrier includes organic solvent, thickener and other auxiliary agents, and sintering aidses are that calcium oxide is included in sodium hexafluoroantimonate, inorganic binder.Passivation emitter solar cell front side silver paste of the present invention is low by adjusting the composition of inorganic binder, inorganic binder activity, reduces the reaction of inorganic binder and passivating film, it is to avoid silver paste forms a large amount of complex centres with silicon chip contact portion；Inorganic binder sintering peak temperature is relatively low, it is to avoid aggravate the reaction of inorganic binder and passivating film under hot conditions.Passivation emitter solar cell front side silver paste of the present invention reduces by adding sintering aidses and widens sintering window, the contact performance still having had at a relatively low sintering temperature, with more preferable low-temperature sintering characteristic.
Description
Technical field
The present invention relates to electric slurry technical field, and in particular to a kind of passivation emitter solar cell front side silver paste.
Background technology
The characteristics of PERC solar cells are passivation emitter back-contact cell, its battery be：(1) positive and negative the two of battery
Face all deposits passivating film, passivating film has an antireflective dual-use function corresponding with increase feux rouges, and reduction carrier is overleaf
Meet；(2) by being slotted in laser technology overleaf dielectric layer, the silicon substrate of wire or point-like is exposed, the aluminium paste of back surface field is then
Directly overlay in backside passivation film with silicon substrate formation localized contact.According to the design feature of PERC batteries, battery needs double
Face is passivated and rear side local contact, so that surface recombination is greatly reduced, improves cell conversion efficiency.
Industry practice shows, although the front side silver paste of conventional batteries can meet the basic using effect of PERC batteries,
Because sintering window is integrally inclined to high temperature, low-temperature sintering window is not wide enough, and damage, thin grid line depth-width ratio table can be brought to passivation layer
It is existing not good enough, so as to limit the performance of PERC battery efficiency potentiality.
The content of the invention
It is an object of the invention to overcome defect present in prior art, there is provided a kind of low-temperature sintering characteristic is good, energy
The passivation emitter solar cell front side silver paste of preferably thin grid line depth-width ratio is provided.
To achieve the above object, the technical scheme is that：A kind of passivation emitter solar cell front side silver paste, its
It is characterised by, the key component of front side silver paste is organic carrier, inorganic binder, silver powder and sintering aidses；Wherein have airborne
Body includes organic solvent, thickener and other auxiliary agents, and sintering aidses are comprising oxidation in sodium hexafluoroantimonate, inorganic binder
Calcium.
Calcium oxide can suppress the sodium ion migration in sintering aidses, improve the chemical stability of glass, and addition sintering promotees
The peak temperature of silver paste sintering can be reduced by entering agent sodium hexafluoroantimonate, the high-temperature sintering window of slurry is significantly broadened, with more preferable
Low-temperature sintering characteristic.
Organic solvent is close with traditional silver paste organic solvent, is not particularly limited, for selected from terpinol, polyol ester,
At least one in butyl, 2-Butoxyethyl acetate, diethylene glycol ether acetate, butyl acetate
Kind.
Further preferred technical scheme is that the key component and percentage by weight of front side silver paste are respectively：Organic carrier
10~25%, inorganic binder 2~8%, sintering aidses 0.1~3%, silver powder 70~85%；Organic solvent in organic carrier
Percentage by weight be 60~90%, the percentage by weight of thickener is 2~20% in organic carrier.
It is preferred that technical scheme be, inorganic binder include PbO, Bi2O3、B2O3、SiO2、Al2O3, ZnO and CaO.
Further preferred technical scheme is, based on inorganic binder weight 100%, and its material composition is：PbO0.5~
5%th, Bi2O355~80%, B2O35~20%, SiO25~14%, Al2O33~8%, ZnO1~6%, CaO4~10%.It is inorganic
Softening point of the combination with relatively low glass of binding agent, cell piece sintering good in 420~500 DEG C of temperature range internal mobilities
During processing, above-mentioned inorganic additive package has good corrosiveness to the silicon nitride anti-reflecting film of battery front side, be conducive to silver-
Silicon forms good Ohmic contact,
In order to improve the fine rule printing performance of silver paste, reach more preferable depth-width ratio, technical scheme preferably is, it is described other
Auxiliary agent includes surfactant and rheological agent, and the surfactant is fatty acid amide, and the rheological agent is selected from modified hydrogen
Change castor oil, polyamide wax and polyurea type auxiliary rheological agents.
It is preferred that technical scheme be, polyurea type auxiliary rheological agents be dissaving structure polyureas, relative molecular weight be 3200~
3600.The rheological characteristic and recoverability of the auxiliary rheological agents of general linear structure are better than dissaving structure, but by dissaving structure
It is used for as auxiliary rheological agents in silver paste, the network structure of complexity can be formed with thickener, silver paste dispersion is stable, the electrode obtained
Film is fine and close, and thickness is uniform, and surface is smooth, and good Ohmic contact is formed with silicon chip.
The optional scope of thickener commonly used in the prior art include ethyl cellulose, hydroxymethyl cellulose, nitrocellulose,
Acrylic resin, alkyd resin, rosin resin, phenolic rosin resin, in order to further optimize the fine rule printing performance of silver paste, subtract
Fine rule sagging phenomenon in few silver paste drying course, technical scheme preferably is that the thickener is selected from cellulose type thickening
Agent.The optional scope of cellulose type thickener includes ethyl cellulose, hydroxymethyl cellulose, nitrocellulose.Thickener and super
Branched structure polyureas rheological agent is used simultaneously, can reach synergy, while reducing the addition of above two material in silver paste
Amount.
In order to optimize the electric conductivity of front electrode, technical scheme preferably is that silver powder is spherical silver powder, the ratio of silver powder
1~2m of surface area2/g；2.5~3.5g/cm of tap density3.Specifically, silver powder selects the combination of model flake silver powder.
It is preferred that technical scheme be, in passivation emitter solar cell front side silver paste also include be selected from bismuth telluride, telluride
The percentage by weight of alloy powder is at least one alloy powder at least one of arsenic and antimony telluride alloy powder, silver paste,
The percentage by weight of alloy powder is 0.01~0.15% in silver paste.Alloy powder has relatively low fusing point, at a sintering temperature
Alloy powder fusing is filled in silver powder gap.Alloy powder with pyroelectric effect contributes to compared with burning SiNx under the conditions of low temperature
Subtract emission layer, form Ag-Si Ohmic contacts, lift open-circuit voltage.
It is preferred that technical scheme be that the particle diameter of silver powder is 0.2~1.7 μm, the particle diameter of alloy powder is 0.8~2 μm.Alloy
Powder is evenly distributed in silver positive electrode and grid line, and the consistency of back electrode is high obtained by the silver paste of above-mentioned silver powder particle diameter distribution, reduces
The resistance of electric current transmission.
The advantages of the present invention are：
Passivation emitter solar cell front side silver paste of the present invention reduces by adding sintering aidses and widens sintering window
Mouthful, the contact performance still having had at a relatively low sintering temperature, with more preferable low-temperature sintering characteristic.
Embodiment
With reference to embodiment, the embodiment to the present invention is further described.Following examples are only used for more
Plus technical scheme is clearly demonstrated, and can not be limited the scope of the invention with this.
The composition of front side silver paste：
The composition of PERC cell front side silver pastes can refer to the composition of traditional front side silver paste, such as Chinese patent
Disclosed in CN103000255A.
Embodiment 1-4 front side silver paste composition see the table below：
Inorganic binder is the inorganic binder (PbO disclosed in embodiment 4 in CN103000255A in embodiment 1
78%th, SiO210%th, Al2O32%th, MgO 1%, ZnO 9%)；Organic solvent wherein in organic carrier is diethylene glycol second
The percentage by weight of organic solvent is 85% in ether acetate, organic carrier, and surfactant and rheology are not included in embodiment 1
Agent.The specific surface area of the silver powder of embodiment 1 is 1~2m2/g；2.5~3.5g/cm of tap density3.Silver powder from conventional particle size 0.2~
1.7μm；Thickener is alkyd resin, and sintering aidses are sodium hexafluoroantimonate.
Embodiment 2-5 inorganic binders are PbO5%, Bi2O350%th, B2O320%th, SiO214%th, Al2O33%th,
ZnO1%, CaO7%.
The component be the same as Example 5 of embodiment 6, the composition for differing only in inorganic binder is：PbO0.5%, Bi2O380%th,
B2O35%th, SiO25%th, Al2O33%th, ZnO2%, CaO4.5%；
The component be the same as Example 5 of embodiment 7, the composition for differing only in inorganic binder is：PbO2%, Bi2O355%th,
B2O310%th, SiO214%th, Al2O35%th, ZnO6%, CaO8%.
The weight percentages of components of inorganic binder is adjusted, peak temperature respective change is sintered.
Compared with Example 7, difference is to add surfactant for fatty acid amide to embodiment 8, and rheological agent is choosing
From modified hydrogenated castor oil.Fatty acid amide accounts for the 0.5% of positive silver paste weight, and modified hydrogenated castor oil accounts for positive silver paste weight
3%, reduce organic solvent consumption.
The difference of embodiment 9 and embodiment 8 is：Rheological agent is linear structure polyureas (being usually used in coating), polyureas
Relative molecular weight is 2700.
Embodiment 10-12 and the difference of embodiment 9 are：Rheological agent is dissaving structure polyureas, the average molecular of polyureas
Measure as 3200,3600 and 3400.
The difference of embodiment 13 and embodiment 12 is that thickener is the NC Nitroncellulose of cellulose type thickener.
The difference of embodiment 14 and embodiment 13 is, telluride is also included in passivation emitter solar cell front side silver paste
The percentage by weight of alloy powder is 0.01% in bismuth alloy powder, silver paste, the particle diameter of bismuth telluride alloy powder for 0.05~
0.15 μm, reduce the consumption of organic carrier.
The difference of embodiment 15 and embodiment 14 is, telluride is also included in passivation emitter solar cell front side silver paste
Arsenic and antimony telluride are with weight ratio 1：The percentage by weight of alloy powder is 0.15% in 1 combination, silver paste.
The difference of embodiment 16 and embodiment 14 is, telluride is also included in passivation emitter solar cell front side silver paste
Arsenic and antimony telluride are with weight ratio 1：The percentage by weight of alloy powder is 0.3% in 1 combination, silver paste.
Comparative example
Comparative example 1 is added without sintering aidses sodium hexafluoroantimonate using the inorganic binder of component same as Example 1.
Comparative example 2 uses inorganic binder same as Example 2；
Silver paste performance test
The slurry prepared is printed on monocrystalline silicon PERC cell backsides by silk-screen printing technique, then is printed by traditional handicraft
PERC positive silver pastes, positive silver paste；By drying, PERC solar cell samples are made after sintering, to embodiment and comparative example institute
Obtain PERC solar cell samples and carry out electric performance test and tensile test.(Eff is conversion efficiency, and Uoc is open-circuit voltage, Rs
For series resistance)
Test result see the table below：
Based on certain silver paste component, Surfactant, alloy powder and thickener are further selected, silver paste and sintering
Back of the body performance of silver electrode variation tendency be the same as Example afterwards.
Under the conditions of comparative example embodiment 8-13 same coateds (thin grid line width is 40 μm), actual grid line is wide by about 41~43
μm, the thin grid line of gained is humping, and depth-width ratio is respectively 0.31,0.32,0.35,0.36,0.35,0.39, the institute of comparative example 1 and 2
It is about 47~49 to obtain actual linewidth grid, and depth-width ratio is 0.2 or so.
Only it is the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art
For, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of passivation emitter solar cell front side silver paste, it is characterised in that the key component of front side silver paste is to have airborne
Body, inorganic binder, silver powder and sintering aidses；Wherein organic carrier includes organic solvent, thickener and other auxiliary agents, sintering
Accelerator is that calcium oxide is included in sodium hexafluoroantimonate, inorganic binder.
2. passivation emitter solar cell front side silver paste according to claim 1, it is characterised in that the master of front side silver paste
Component and the percentage by weight is wanted to be respectively：Organic carrier 10~25%, inorganic binder 2~8%, sintering aidses 0.1~
3%th, silver powder 70~85%；The percentage by weight of organic solvent is thickener in 60~90%, organic carrier in organic carrier
Percentage by weight is 2~20%.
3. passivation emitter solar cell front side silver paste according to claim 2, it is characterised in that inorganic binder bag
Containing PbO, Bi2O3、B2O3、SiO2、Al2O3, ZnO and CaO.
4. passivation emitter solar cell front side silver paste according to claim 3, it is characterised in that by inorganic binder
Weight 100% is counted, and its material composition is：PbO0.5~5%, Bi2O355~80%, B2O35~20%, SiO25~14%,
Al2O33~8%, ZnO1~6%, CaO4~10%.
5. passivation emitter solar cell front side silver paste according to claim 1, it is characterised in that other described auxiliary agents
Comprising surfactant and rheological agent, the surfactant is fatty acid amide, and the rheological agent is selected from modified hydrogenated castor
Sesame oil, polyamide wax and polyurea type auxiliary rheological agents.
6. passivation emitter solar cell front side silver paste according to claim 5, it is characterised in that polyurea type rheology is helped
Agent is dissaving structure polyureas, and relative molecular weight is 3200~3600.
7. passivation emitter solar cell front side silver paste according to claim 5, it is characterised in that the thickener is
Selected from cellulose type thickener.
8. passivation emitter solar cell front side silver paste according to claim 1, it is characterised in that silver powder is spherical
Silver powder, 1~2m of specific surface area of silver powder2/g；2.5~3.5g/cm of tap density3。
9. passivation emitter solar cell front side silver paste according to claim 1, it is characterised in that passivation emitter is too
It is positive also to include in cell front side silver paste at least one of bismuth telluride, arsenic telluride and antimony telluride alloy powder, silver paste
The percentage by weight of alloy powder is the percentage by weight of alloy powder at least one alloy powder, silver paste for 0.01~
0.15%.
10. passivation emitter solar cell front side silver paste according to claim 9, it is characterised in that the particle diameter of silver powder
For 0.2~1.7 μm, the particle diameter of alloy powder is 0.05~0.15 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522213.4A CN107331433B (en) | 2017-06-30 | 2017-06-30 | A kind of passivation emitter solar cell front side silver paste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522213.4A CN107331433B (en) | 2017-06-30 | 2017-06-30 | A kind of passivation emitter solar cell front side silver paste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107331433A true CN107331433A (en) | 2017-11-07 |
| CN107331433B CN107331433B (en) | 2018-12-14 |
Family
ID=60199397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710522213.4A Active CN107331433B (en) | 2017-06-30 | 2017-06-30 | A kind of passivation emitter solar cell front side silver paste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107331433B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511106A (en) * | 2018-02-28 | 2018-09-07 | 江苏国瓷泓源光电科技有限公司 | Mix the high-tensile strength solar cell front side silver paste and preparation method thereof of tellurides |
| CN108586832A (en) * | 2018-03-28 | 2018-09-28 | 山东建邦胶体材料有限公司 | Solar cell front side silver paste special carrier containing heat-induced gel and preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000255A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Solar cell front sliver paste adaptable to low-temperature sintering |
| WO2013141426A1 (en) * | 2012-03-23 | 2013-09-26 | (주)창성 | Electrode paste composition for solar cell |
| CN104078090A (en) * | 2013-03-28 | 2014-10-01 | 比亚迪股份有限公司 | Conductive paste for crystalline silicon solar cell and preparation method of conductive paste |
| CN104681641A (en) * | 2013-11-29 | 2015-06-03 | 比亚迪股份有限公司 | Etching resisting agent and preparation method thereof as well as SE (selective emitter) crystalline silicon solar cell and preparation method thereof |
-
2017
- 2017-06-30 CN CN201710522213.4A patent/CN107331433B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013141426A1 (en) * | 2012-03-23 | 2013-09-26 | (주)창성 | Electrode paste composition for solar cell |
| CN103000255A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Solar cell front sliver paste adaptable to low-temperature sintering |
| CN104078090A (en) * | 2013-03-28 | 2014-10-01 | 比亚迪股份有限公司 | Conductive paste for crystalline silicon solar cell and preparation method of conductive paste |
| CN104681641A (en) * | 2013-11-29 | 2015-06-03 | 比亚迪股份有限公司 | Etching resisting agent and preparation method thereof as well as SE (selective emitter) crystalline silicon solar cell and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511106A (en) * | 2018-02-28 | 2018-09-07 | 江苏国瓷泓源光电科技有限公司 | Mix the high-tensile strength solar cell front side silver paste and preparation method thereof of tellurides |
| CN108586832A (en) * | 2018-03-28 | 2018-09-28 | 山东建邦胶体材料有限公司 | Solar cell front side silver paste special carrier containing heat-induced gel and preparation method |
| CN108586832B (en) * | 2018-03-28 | 2020-11-13 | 山东建邦胶体材料有限公司 | Special carrier containing thermal gel for solar cell front silver paste and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107331433B (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107274964B (en) | A kind of passivation emitter back silver paste of solar cell | |
| US11756699B1 (en) | Conductive silver aluminum paste, preparation method, electrode and cell | |
| TWI621600B (en) | Paste composition for solar cell front electrode and solar cell using thereof | |
| CN106782753B (en) | Silver paste for printing crystalline silicon solar cell and preparation method thereof | |
| TWI631088B (en) | Glass frit composition, paste, and solar cell using the same | |
| CN106477897A (en) | Glass dust and apply this glass dust be obtained anelectrode silver paste, solaode | |
| KR20130042524A (en) | Silver paste composition and solar cell using the same | |
| US20210350948A1 (en) | Full-area aluminum back surface field back-side silver paste and preparation method and application thereof | |
| CN110415858B (en) | Front silver paste for crystalline silicon solar cell in grading and preparation method thereof | |
| CN110120274B (en) | Back electrode slurry of all-aluminum back surface field and preparation method and application thereof | |
| CN107331433B (en) | A kind of passivation emitter solar cell front side silver paste | |
| CN110534227A (en) | A kind of high-performance silver paste applied to N+ layers of TOPCon battery | |
| WO2018040570A1 (en) | Local contact back surface field aluminum paste for high-efficiency double-sided crystalline silicon solar cell and preparation method thereof | |
| TWI714897B (en) | Conductive paste for electrode of solar cell, glass frit included in the same, and solar cell | |
| TW201830714A (en) | Front electrode for solar cell and solar cell comprising the same | |
| US20130160835A1 (en) | Back-side electrode of p-type solar cell and method for forming the same | |
| US9640298B2 (en) | Silver paste composition for forming an electrode, and silicon solar cell using same | |
| TW201432921A (en) | Conductive paste for enhancing conversion efficiency of solar cell | |
| TWI678711B (en) | Conductive paste composition and solar cell using the same | |
| CN103366860A (en) | Solar cell used conductive slurry, preparation method thereof, and method for preparing solar cell | |
| WO2020088254A1 (en) | Solar cell sheet, solar cell and composition for preparing solar cell electrode | |
| KR20110024655A (en) | Composition for foarming solar-cell electrode characterized by low bowing | |
| TWI482291B (en) | An electroconductive paste for solar cell | |
| KR20130067693A (en) | Ag paste composition for forming electrode and silicon solar cell using the same | |
| CN115985549B (en) | Electrode slurry and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |