CN111276278B - Graphene efficient solar cell front silver paste and preparation method thereof - Google Patents
Graphene efficient solar cell front silver paste and preparation method thereof Download PDFInfo
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 79
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 55
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 47
- 239000004332 silver Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 55
- 239000000843 powder Substances 0.000 claims abstract description 55
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000011049 filling Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000002270 dispersing agent Substances 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 6
- NDSYZZUVPRGESW-UHFFFAOYSA-N 2-(2-octoxyethoxy)ethanol Chemical compound CCCCCCCCOCCOCCO NDSYZZUVPRGESW-UHFFFAOYSA-N 0.000 claims description 6
- WAEVWDZKMBQDEJ-UHFFFAOYSA-N 2-[2-(2-methoxypropoxy)propoxy]propan-1-ol Chemical compound COC(C)COC(C)COC(C)CO WAEVWDZKMBQDEJ-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
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 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
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000007787 solid Substances 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
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000005245 sintering Methods 0.000 abstract description 6
- 238000010923 batch production Methods 0.000 abstract description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- -1 graphite alkene Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910019704 Nb2O Inorganic materials 0.000 description 1
- 229910003069 TeO2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000011031 large-scale manufacturing process Methods 0.000 description 1
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- 238000007781 pre-processing Methods 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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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
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic 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
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/18—Conductive material dispersed in non-conductive inorganic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- 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
- 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
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- 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
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- 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
Abstract
The invention provides a graphene high-efficiency solar cell front silver paste and a preparation method thereof, and relates to the field of new materials, wherein the graphene high-efficiency solar cell front silver paste comprises the following raw materials in percentage by weight: 88-89% of silver powder, 1.9-3% of glass powder, 8-10% of organic carrier and 0.02-0.06% of graphene, and the preparation method of the graphene high-efficiency solar cell front silver paste comprises the following steps: the method comprises the steps of pretreatment, material preparation, stirring, grinding, filtering, performance detection, filling and warehousing of the graphene, the graphene silver paste prepared by the method has high conversion efficiency, and meanwhile, due to the fact that the two-component mixed lead-free glass powder is used, the method has a wide process sintering window, and the feasibility of batch production of various products of a client side is improved.
Description
Technical Field
The invention relates to the field of new materials, and particularly relates to a graphene high-efficiency solar cell front silver paste and a preparation method thereof.
Background
With the national attention degree on the development and utilization of new energy, the solar energy recycling is favored by its unique advantages, and then the demand of solar cells is continuously increased, and research and development personnel face some urgent technical problems in the process of developing high-efficiency solar cells (such as improving the photoelectric conversion efficiency of the cells, reducing the cost of the cells, etc.); the graphene with the characteristics of high strength, high conductivity, high specific surface area and the like provides a new solution direction for technical experts; research and development personnel are with graphite alkene applied all kinds of solar energy on the positive silver thick liquid, then on printing the silicon chip with the silver thick liquid through screen printing's mode, and then high temperature sintering handles, and at the in-process of high temperature sintering, graphite alkene film deposit is at the silicon surface, and it can effectively promote the photoelectric conversion efficiency of battery piece. At present, the application of the front silver paste of the graphene does not have more processes and application examples which are suitable for large-scale production and have excellent photoelectric conversion efficiency.
The Chinese invention patent with application publication number CN107808705A discloses a solar cell front silver paste and a preparation method thereof, wherein the material composition (in parts by weight) is as follows: 85-90 parts of modified silver powder, 8-12 parts of organic carrier and 4-5 parts of glass powder; the modified silver powder is spherical silver powder doped with carbon nano tubes, and the weight ratio of the carbon nano tubes to the spherical silver powder is 3-5:100.
the problems in the prior art include that the photoelectric conversion efficiency of the cell is low, the formula of the graphene in the front silver paste in a mass production mode is less, the graphene pretreatment mode applied to the front silver paste is complex, and meanwhile, the problems that the process of mass production is unavailable and the like do not exist, so that the solar cell front silver paste has higher requirements.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the graphene high-efficiency solar cell front silver paste and the preparation method thereof, so that the solar cell front silver paste has high photoelectric conversion rate, and the graphene early-stage treatment method is simple and effective and has good stability.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the graphene high-efficiency solar cell front silver paste comprises the following elements in percentage by weight:
88-89% of silver powder, 1.9-3% of glass powder, 8-10% of organic carrier and 0.02-0.06% of graphene.
Preferably, the silver powder is coated silver powder, the purity of the coated silver powder is 99.9%, the content of the coating agent is 0.6-0.7%, and the wire diameter D50 is 1.5-1.8 μm.
Preferably, the glass powder is a double-component lead-free glass powder, the double-component lead-free glass powder is prepared from 75% of glass powder B and 25% of glass powder M, and the glass powder B comprises the following raw materials: 42% of Bi2O3, 38% of TeO2, 4% of SiO2, 6% of WO3, 5% of Nb2O 2, 3% of Sr2CO3 and 5% of P2O5, wherein the glass powder M comprises the following raw materials: 70% of Bi2O3, 18% of H3BO3, 0.3% of ZnO, 1% of Al2O3, 3% of CeO2, 0.7% of MoO3 and 7% of Y2O 3.
Preferably, the organic carrier is prepared from the following raw materials in percentage by weight: 30.7% of diethylene glycol octyl ether, 22.4% of tripropylene glycol methyl ether, 15% of butyl carbitol acetate, 24% of triglyceride modified organic silicon resin, 1.5% of rosin modified acrylic resin, 3.2% of dispersant BYK-111, and 3.2% of dispersant BYK-111.
The preparation method of the graphene high-efficiency solar cell front silver paste comprises the following steps:
(1) Preprocessing graphene: mixing graphene and a dispersing agent according to the weight ratio of 1:8, dispersing and stirring the mixture for 10 to 11 hours in a double-planet stirrer with the solvent temperature of less than or equal to 40 ℃ at the rotating speed of 80 to 100rpm, and then carrying out vacuum pumping treatment for 30 to 60 minutes in a suspension vacuum filter under the pressure of 0.05 to 0.1MPa to obtain the graphene with the required fineness;
(2) Preparing materials: sequentially weighing the organic carrier, the glass powder, the graphene and the silver powder on an electronic scale according to the formula amount for later use;
(3) Stirring: placing the raw materials in a stirring cylinder with wheels according to the weighing sequence, pushing the stirring cylinder into a double-planet stirrer, and stirring for 20-50min at a stirring speed of 80-120rpm to obtain slurry;
(4) Grinding: placing the stirred slurry into a three-roll grinder with the model of 120A, and grinding for 6-10 times at the grinding speed of 300rpm and the pressure of 0.8Mpa to ensure that the fineness of the slurry meets the following requirements: d5 is less than 3 mu m;
(5) And (3) filtering: filtering the ground slurry through a 500-mesh filter screen under the pressure of 0.05MPa, and removing large-particle substances to obtain silver paste;
(6) And (3) performance detection: the viscosity, fineness and solid content of the silver paste are tested, and the silver paste meets the following requirements: the viscosity is 100-110kcps @50rpm, the fineness is D5 less than 3 μm, and the solid content is 91.3%, so that the graphene high-efficiency solar cell front silver paste meeting the requirements is obtained;
(7) Filling: filling according to the weight requirement of a customer;
(8) Warehousing: and warehousing the filled front silver paste.
Preferably, the dispersant in the step (1) is prepared from BYK110 and ET20 according to the proportion of 1:1 in proportion.
Has the advantages that:
(1) The graphene silver paste prepared by the method has high conversion efficiency, and meanwhile, due to the use of the double-component mixed lead-free glass powder, the method has a wider process sintering window, and the feasibility of batch production of various products at a client side is improved.
(2) The graphene silver paste prepared by the method has stable product performance and can be produced in batches.
(3) The pretreatment operation of the graphene is simple and effective, batch treatment can be realized, and the difference between batches is small.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1: a flow chart of a silver paste preparation process;
FIG. 2 is a schematic diagram: and (5) performance detection flow chart.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the graphene high-efficiency solar cell front silver paste comprises the following elements in percentage by weight:
89% of silver powder, 2.5% of glass powder, 8.48% of organic carrier and 0.02% of graphene.
Wherein the silver powder is coated silver powder, the purity of the coated silver powder is 99.9%, the content of the coating agent is 0.7%, and the wire diameter D50 is 1.5 mu m.
The glass powder is double-component lead-free glass powder, the double-component lead-free glass powder is prepared from 75% of glass powder B and 25% of glass powder M, and the glass powder B comprises the following raw materials: bi 2 O 3 42％、TeO 2 38％、SiO 2 4％、WO 3 6％、Nb 2 O 5 2％、Sr 2 CO 3 3％、P 2 O 5 5%, the glass powder M comprises the following raw materials: bi 2 O 3 70％、H 3 BO 3 18％、ZnO 0.3％、Al 2 O 3 1％、CeO 2 3％、MoO 3 0.7％、Y 2 O 3 7％。
Wherein the organic carrier is prepared from the following raw materials in percentage by weight: 30.7% of diethylene glycol octyl ether, 22.4% of tripropylene glycol methyl ether, 15% of butyl carbitol acetate, 24% of triglyceride modified organic silicon resin, 1.5% of rosin modified acrylic resin, 3.2% of dispersant BYK-1113.2%.
Example 2:
the graphene high-efficiency solar cell front silver paste comprises the following elements in percentage by weight:
89% of silver powder, 2.5% of glass powder, 8.46% of organic carrier and 0.04% of graphene.
Wherein the silver powder is coated silver powder, the purity of the coated silver powder is 99.9%, the content of the coating agent is 0.6%, and the wire diameter D50 is 1.8 mu m.
The glass powder is double-component lead-free glass powder, the double-component lead-free glass powder is prepared from 75% of glass powder B and 25% of glass powder M, and the glass powder B comprises the following raw materials: bi 2 O 3 42％、TeO 2 38％、SiO 2 4％、WO 3 6％、Nb 2 O 5 2％、Sr 2 CO 3 3％、P 2 O 5 5%, the glass powder M comprises the following raw materials: bi 2 O 3 70％、H 3 BO 3 18％、ZnO 0.3％、Al 2 O 3 1％、CeO 2 3％、MoO 3 0.7％、Y 2 O 3 7％。
Wherein the organic carrier is prepared from the following raw materials in percentage by weight: 30.7% of diethylene glycol octyl ether, 22.4% of tripropylene glycol methyl ether, 15% of butyl carbitol acetate, 24% of triglyceride modified organic silicon resin, 1.5% of rosin modified acrylic resin, 3.2% of dispersant BYK-1113.2%.
Example 3:
the graphene high-efficiency solar cell front silver paste comprises the following elements in percentage by weight:
89% of silver powder, 2.5% of glass powder, 8.44% of organic carrier and 0.06% of graphene.
Wherein the silver powder is coated silver powder, the purity of the coated silver powder is 99.9%, the content of the coating agent is 0.65%, and the wire diameter D50 is 1.7 mu m.
The glass powder is double-component lead-free glass powder, the double-component lead-free glass powder is prepared from 75% of glass powder B and 25% of glass powder M, and the glass powder B comprises the following raw materials: bi 2 O 3 42％、TeO 2 38％、SiO 2 4％、WO 3 6％、Nb 2 O 5 2％、Sr 2 CO 3 3％、P 2 O 5 5%, the glass powder M comprises the following raw materials: bi 2 O 3 70％、H 3 BO 3 18％、ZnO 0.3％、Al 2 O 3 1％、CeO 2 3％、MoO 3 0.7％、Y 2 O 3 7％。
Wherein the organic carrier is prepared from the following raw materials in percentage by weight: 30.7% of diethylene glycol octyl ether, 22.4% of tripropylene glycol methyl ether, 15% of butyl carbitol acetate, 24% of triglyceride modified organic silicon resin, 1.5% of rosin modified acrylic resin, 3.2% of dispersant BYK-1113.2%.
Comparative example:
the graphene high-efficiency solar cell front silver paste comprises the following elements in percentage by weight:
89% of silver powder, 2.5% of glass powder, 8.5% of organic carrier and 0% of graphene.
Wherein the silver powder is coated silver powder, the purity of the coated silver powder is 99.9%, the content of the coating agent is 0.65%, and the wire diameter D50 is 1.6 mu m.
The glass powder is double-component lead-free glass powder, the double-component lead-free glass powder is prepared from 75% of glass powder B and 25% of glass powder M, and the glass powder B comprises the following raw materials: bi 2 O 3 42％、TeO 2 38％、SiO 2 4％、WO 3 6％、Nb 2 O 5 2％、Sr 2 CO 3 3％、P 2 O 5 5%, the glass powder M comprises the following raw materials: bi 2 O 3 70％、H 3 BO 3 18％、ZnO 0.3％、Al 2 O 3 1％、CeO 2 3％、MoO 3 0.7％、Y 2 O 3 7％。
Wherein the organic carrier is prepared from the following raw materials in percentage by weight: 30.7% of diethylene glycol octyl ether, 22.4% of tripropylene glycol methyl ether, 15% of butyl carbitol acetate, 24% of triglyceride modified organic silicon resin, 1.5% of rosin modified acrylic resin, 3.2% of dispersant BYK-1113.2%.
The preparation method of the front silver paste of the graphene high-efficiency solar cell in the embodiments 1 to 4 includes the following steps:
(1) Pretreatment of graphene: mixing graphene and a dispersing agent according to the proportion of 1:8, dispersing and stirring the mixture for 10 to 11 hours in a double-planet stirrer with the solvent temperature of less than or equal to 40 ℃ at the rotating speed of 80 to 100rpm, and then carrying out vacuum pumping treatment for 30 to 60 minutes in a suspension vacuum filter under the pressure of 0.05 to 0.1MPa to obtain the graphene with the required fineness;
(2) Preparing materials: sequentially weighing the organic carrier, the glass powder, the graphene and the silver powder on an electronic scale according to the formula amount for later use;
(3) Stirring: placing the raw materials in a stirring cylinder with wheels according to the weighing sequence, pushing the stirring cylinder into a double-planet stirrer, and stirring for 20-50min at a stirring speed of 80-120rpm to obtain slurry;
(4) Grinding: placing the stirred slurry into a three-roll grinder with the model of 120A, and grinding for 6-10 times at the grinding speed of 300rpm and the pressure of 0.8Mpa to ensure that the fineness of the slurry meets the following requirements: d5 is less than 3 mu m;
(5) And (3) filtering: filtering the ground slurry through a 500-mesh filter screen under the pressure of 0.05MPa, and removing large-particle substances to obtain silver paste;
(6) And (3) performance detection: the viscosity, fineness and solid content of the silver paste are tested, and the silver paste meets the following requirements: the viscosity is 100-110kcps @50rpm, the fineness is D5 less than 3 μm, and the solid content is 91.3%, so that the graphene high-efficiency solar cell front silver paste meeting the requirements is obtained;
(7) Filling: filling according to the weight requirement of a client;
(8) Warehousing: and warehousing the filled front silver paste.
Wherein, the dispersing agent in the step (1) is prepared from BYK110 and ET20 according to the proportion of 1:1, and mixing the components in a ratio of 1.
The embodiment and the proportion are as follows:
and (3) performance testing:
the determination method comprises the following steps: and printing the front silver paste on the silicon chip in a screen printing mode, and performing performance detection after high-temperature sintering treatment.
And (3) electrical property detection: the following table electrical properties were tested using a Berger tester.
Carrying out screen printing, high-temperature sintering and electrical property testing according to the application process of the front silver paste, wherein the testing data are as follows:
in conclusion, the embodiment of the invention has the following beneficial effects:
(1) According to the invention, by controlling the amount of the organic carrier and the graphene, each electrical property reaches a higher level, particularly the EFF value of the photoelectric conversion efficiency of the cell reaches more than 18.800%, so that the conversion efficiency of the solar cell is effectively improved.
(2) The invention improves the conversion efficiency of the solar cell without reducing the welding tension, the average value of the welding tension can reach 3.8N, and the long service life of the solar cell is ensured.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. The graphene efficient solar cell front silver paste is characterized in that the elements in the raw materials and the weight percentages of the elements are as follows: 88-89% of silver powder, 1.9-3% of glass powder, 8-10% of organic carrier and 0.02-0.06% of graphene;
the weight percentage of the organic carrier is any one of 8.44%, 8.46% and 8.48%; the graphene is 0.02%, 0.04% or 0.06% in percentage by weight;
the glass powder is double-component lead-free glass powder, the double-component lead-free glass powder is prepared from 75% of glass powder B and 25% of glass powder M, and the glass powder B comprises the following raw materials: bi 2 O 3 42％、TeO 2 38％、SiO 2 4％、WO 3 6％、Nb 2 O 5 2％、Sr 2 CO 3 3％、P 2 O 5 5%, the glass powder M comprises the following raw materials: bi 2 O 3 70％、H 3 BO 3 18％、ZnO 0.3％、Al 2 O 3 1％、CeO 2 3％、MoO 3 0.7％、Y 2 O 3 7％；
The organic carrier is prepared from the following raw materials in percentage by weight: 30.7% of diethylene glycol octyl ether, 22.4% of tripropylene glycol methyl ether, 15% of butyl carbitol acetate, 24% of triglyceride modified organic silicon resin, 1.5% of rosin modified acrylic resin, 5363% of dispersant BYK-1103.2 and 3.2% of dispersant BYK-111;
the pretreatment of the graphene comprises the following steps: mixing graphene and a dispersing agent according to the proportion of 1:8, dispersing and stirring the mixture for 10 to 11 hours in a double-planet stirrer with the solvent temperature of less than or equal to 40 ℃ at the rotating speed of 80 to 100rpm, and then carrying out vacuum pumping treatment for 30 to 60 minutes in a suspension vacuum filter under the pressure of 0.05 to 0.1MPa to obtain the graphene with the required fineness.
2. The graphene high-efficiency solar cell front silver paste according to claim 1, wherein the silver powder is coated silver powder, the purity of the coated silver powder is 99.9%, the content of a coating agent is 0.6-0.7%, and the wire diameter D50 is 1.5-1.8 μm.
3. The method for preparing the graphene high-efficiency solar cell front silver paste according to claim 1, is characterized by comprising the following steps:
(1) Pretreatment of graphene: mixing graphene and a dispersing agent according to the weight ratio of 1:8, dispersing and stirring the mixture for 10 to 11 hours in a double-planet stirrer with the solvent temperature of less than or equal to 40 ℃ at the rotating speed of 80 to 100rpm, and then carrying out vacuum pumping treatment for 30 to 60 minutes in a suspension vacuum filter under the pressure of 0.05 to 0.1MPa to obtain the graphene with the required fineness;
(2) Preparing materials: sequentially weighing the organic carrier, the glass powder, the graphene and the silver powder on an electronic scale according to the formula amount for later use;
(3) Stirring: placing the raw materials in a stirring cylinder with wheels according to the weighing sequence, pushing the stirring cylinder into a double-planet stirrer, and stirring for 20-50min at the stirring speed of 80-120rpm to obtain slurry;
(4) Grinding: placing the stirred slurry into a three-roll grinder with the model of 120A, and grinding for 6-10 times at the grinding speed of 300rpm and the pressure of 0.8Mpa to ensure that the fineness of the slurry meets the following requirements: d5 is less than 3 mu m;
(5) And (3) filtering: filtering the ground slurry through a 500-mesh filter screen under the pressure of 0.05MPa, and removing large-particle substances to obtain silver paste;
(6) And (3) performance detection: the viscosity, fineness and solid content of the silver paste are tested, and the silver paste meets the following requirements: the viscosity is 100-110kcps @50rpm, the fineness is D5 less than 3 μm, and the solid content is 91.3%, so that the graphene high-efficiency solar cell front silver paste meeting the requirements is obtained;
(7) Filling: filling according to the weight requirement of a client;
(8) Warehousing: and warehousing the filled front silver paste.
4. The preparation method of the graphene high-efficiency solar cell front silver paste according to claim 3, wherein the dispersant in the step (1) is prepared from BYK110 and ET20 according to a ratio of 1:1, and mixing the components in a ratio of 1.
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| CN106887271A (en) * | 2017-03-16 | 2017-06-23 | 西安晶晟光电科技有限公司 | Modified lead-free silver slurry of a kind of Graphene and preparation method thereof |
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| CN104464883B (en) * | 2014-12-26 | 2017-02-22 | 苏州格瑞丰纳米科技有限公司 | Graphene electrocondution slurry with dispersants adsorbed on surface and manufacturing method and application thereof |
| CN105845198B (en) * | 2016-05-16 | 2017-09-12 | 南通天盛新能源股份有限公司 | Solar cell front side silver paste of doping vario-property graphene and preparation method thereof |
| CN107265872B (en) * | 2017-07-10 | 2020-08-04 | 上海银浆科技有限公司 | Double-component lead-free glass powder suitable for front silver paste of crystalline silicon battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106128553A (en) * | 2016-09-23 | 2016-11-16 | 苏州柏特瑞新材料有限公司 | A kind of high-performance Pb-free crystal silicon solar batteries back electrode silver slurry and preparation method thereof |
| CN106887271A (en) * | 2017-03-16 | 2017-06-23 | 西安晶晟光电科技有限公司 | Modified lead-free silver slurry of a kind of Graphene and preparation method thereof |
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Denomination of invention: A graphene high-efficiency solar cell front silver paste and its preparation method Effective date of registration: 20230914 Granted publication date: 20221129 Pledgee: Industrial Bank Co.,Ltd. Shanghai Minhang sub branch Pledgor: SHANGHAI YINJIANG TECHNOLOGY CO.,LTD. Registration number: Y2023310000548 |