WO2019205223A1 - Pâte d'argent conductrice pour la surface avant d'une photopile en silicium cristallin et son procédé de préparation, et photopile - Google Patents

Pâte d'argent conductrice pour la surface avant d'une photopile en silicium cristallin et son procédé de préparation, et photopile Download PDF

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WO2019205223A1
WO2019205223A1 PCT/CN2018/088855 CN2018088855W WO2019205223A1 WO 2019205223 A1 WO2019205223 A1 WO 2019205223A1 CN 2018088855 W CN2018088855 W CN 2018088855W WO 2019205223 A1 WO2019205223 A1 WO 2019205223A1
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solar cell
crystalline silicon
silicone oil
silicon solar
parts
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PCT/CN2018/088855
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English (en)
Chinese (zh)
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孙丰振
李宇
刘小丽
李德林
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深圳市首骋新材料科技有限公司
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Priority to CN201880003007.5A priority Critical patent/CN110663087A/zh
Publication of WO2019205223A1 publication Critical patent/WO2019205223A1/fr

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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
    • 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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to the field of solar cell technologies, and in particular, to a front-side conductive silver paste of a crystalline silicon solar cell, a preparation method thereof, and a solar cell. Background technique
  • Solar energy is an inexhaustible clean energy source. With the depletion of non-renewable energy sources such as coal and oil, the development and use of solar energy has become a hot spot. Solar cells developed based on this idea are an important means of utilizing solar energy. At present, the realization of industrialized crystalline silicon solar cells has become a model for solar cell applications.
  • a cell sheet is a core component of a crystalline silicon solar cell.
  • a conductive paste is applied to the silicon wafer by screen printing, and a front electrode is formed on the front surface of the silicon wafer by sintering.
  • the front electrode of the sintered crystalline silicon solar cell needs to be firmly adhered on the silicon wafer, the gate line is narrow and high, the light shielding area is small, and the welding is easy, and the conductive paste for the front electrode of the silicon solar cell needs to have the silicon nitride penetrated during the sintering process.
  • a common crystalline silicon solar cell front conductive silver paste is composed of silver powder, glass powder, and an organic carrier, and the conductive silver paste is printed on the surface of the battery sheet by screen printing, and is sintered to form a front electrode.
  • the screen printing performance of the front conductive silver paste is important for its overall performance, and the organic carrier is the main factor determining its screen printing performance.
  • the front conductive silver paste can be printed on the finer screen sub-gate opening and the printed sub-gate has an excellent aspect ratio, and the ratio of the height and width of the gate line is larger, and the resistance is low.
  • the efficiency of the battery sheet is high, and the finer the screen sub-gate opening, the thinner the width of the front conductive silver paste sub-gate printed on the surface of the battery sheet, the less the surface of the battery sheet is covered, and the area of the battery sheet for receiving solar light.
  • the technical problem to be solved by the present invention is: providing a front-side conductive silver paste of a crystalline silicon solar cell and a preparation method thereof, so as to solve the problem that the existing front conductive silver paste cannot be printed on a thin line, thereby causing front conductive silver
  • the slurry must be printed on the cell sheet on a relatively wide open screen, so that the width of the front electrode after sintering is wide, the area of the solar cell is covered, the effective utilization area of the solar cell is reduced, and the photoelectric conversion efficiency of the cell is low.
  • the present invention also provides a method for fabricating a front electrode of a crystalline silicon solar cell and a solar battery.
  • a crystalline silicon solar cell front conductive silver paste based on a total weight of 100 parts, comprising the following composition ratio components:
  • organic carrier 6.0 ⁇ 15.0 parts
  • the lauric oil is methyl laurel oil, ethyl laurel oil, phenyl laurel oil, methyl chloro oleic acid, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxylate At least one of silicone oil, methyl trifluoropropyl silicone oil, methyl vinyl silicone oil, methyl hydroxy silicone oil, ethyl hydrogen silicone oil, hydroxyl hydrogen silicone oil, and cyanogen-containing silicone oil.
  • a method for preparing a conductive silver paste on a front side of a crystalline silicon solar cell comprises at least the following steps: [0015] Step S01: melting a glass frit raw material component to obtain a glass frit melt, the molten metal The quenching treatment is carried out to obtain glass powder particles, and after crushing, a glass powder powder having a particle diameter of 0.1 to 5. (Vm;
  • Step S02. The organic carrier raw material is placed in an environment of 40 to 100 ° C for mixing treatment to obtain an organic vehicle; [0017] Step S03. The metal powder and the glass powder powder obtained in Step S01, the organic obtained in Step S02 The carrier and the silicone oil are mixed to obtain a conductive silver paste on the front side of the crystalline silicon solar cell.
  • a method for fabricating a front surface electrode of a crystalline silicon solar cell includes at least the following steps:
  • the above-mentioned crystalline silicon solar cell front conductive silver paste is printed on the surface of the insulating film by printing, and then sequentially dried, sintered, and cooled to obtain a front surface electrode of the crystalline silicon solar cell.
  • the present invention provides a silicon-silicate solar cell with a silicone oil in the front conductive silver paste, which improves the performance and flow performance of the front conductive silver paste, and the screen printing performance is greatly improved, and can be narrower.
  • Printing on the open screen, the front side of the silver electrode is made narrower, obtaining a better aspect ratio, reducing the coverage area of the solar cell, increasing the effective area of the solar cell to receive sunlight, thereby improving the conversion efficiency of the solar cell. And use efficiency.
  • the preparation method of the front surface conductive silver paste of the crystalline silicon solar cell provided by the invention has simple process conditions, and the obtained front conductive silver paste component has uniform composition and good performance, and is suitable for industrial mass production.
  • FIG. 1 is a schematic view showing a process flow for preparing a conductive silver paste on a front side of a crystalline silicon solar cell according to the present invention
  • FIG. 2 is a schematic view showing a process flow of a method for fabricating a front electrode of a crystalline silicon solar cell according to the present invention
  • FIG. 3 is a view showing the present invention for printing a crystalline silicon semiconductor device having an insulating film on its surface. Schematic diagram of the front conductive silver paste;
  • FIG. 4 is a schematic view of the crystalline silicon semiconductor device printed with the front and back front conductive silver pastes in FIG. 3 in accordance with the present invention. [0027] FIG.
  • FIG. 5 is a schematic diagram of a 180 degree tensile test
  • 6A is a front electrode topography of the first embodiment, the front electrode width is 29.6 pm, the screen screen opening 23 pm, and the front conductive silver paste of the embodiment 1 contains 3% of silicone oil;
  • 6B is a front electrode topography prepared in Comparative Example 1, the front electrode width is 43.4—, the screen screen opening 2 3[im Comparative Example 1 of the front conductive silver paste does not contain laurel oil;
  • both crystalline silicon and silicon crystals mean the same meaning.
  • a front side conductive silver paste of a crystalline silicon solar cell in terms of 100 parts by weight, comprising the following raw material components:
  • metal powder 80.0 ⁇ 93.0 parts; organic carrier 6.0 ⁇ 15.0 parts; glass powder 1.0 ⁇ 5.0 parts; silicone oil 0.06 ⁇ 3.75 parts
  • the metal powder is silver, gold, platinum, copper, iron, nickel, zinc, titanium, cobalt, chromium, smear, manganese,
  • At least one of I and ⁇ At least one of I and ⁇ .
  • the metal powder is at least one of silver-coated copper, iron, nickel, zinc, titanium, cobalt, chromium, molybdenum, and manganese, wherein the thickness of the silver coating layer is 10 ⁇ 50nm
  • the metal powder is a mixture of a non-silver coated metal powder and a silver coated metal powder, wherein a weight ratio of the non-silver coated metal powder to the silver coated metal powder
  • the metal powder coated with 5/95 to 95/5 non-silver is at least one of silver, gold, platinum, copper, iron, nickel, zinc, titanium, cobalt, chromium, smear, manganese, ffi, samarium;
  • the coated metal powder is at least one of copper, iron, nickel, zinc, titanium, cobalt, chromium, magnesium, and manganese, and the thickness of the silver coating layer is 10 to 50 nm.
  • the organic vehicle in the present invention includes an organic solvent, a polymer, a wetting and dispersing agent, a thixotropic agent, and other functional additives.
  • the weight of the organic vehicle is 100 parts, and the following components are included:
  • organic solvent 50 ⁇ 95 parts; polymer 1 ⁇ 40 parts; wetting and dispersing agent 0.1 ⁇ 10 parts; thixotropic agent 1 ⁇ 20 parts; His functional additives are 0.1 ⁇ 20.
  • the silicone oil is methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoropropyl
  • a base silicone oil a methyl vinyl silicone oil, a methyl hydroxy silicone oil, an ethyl hydrogen silicone oil, a hydroxyl hydrogen silicone oil, and a cyanide-containing silicone oil.
  • the organic solvent is selected from the group consisting of terpineol, tetracaine, ethylene glycol butyl ether acetate, ethylene glycol ethyl ether acetate, decadiol ester, diethylene glycol butyl ether, triethylene glycol butyl ether, At least one of a high boiling point solvent such as tripropylene glycol methyl ether or decene.
  • the polymer is selected from at least one of ethyl cellulose, methyl cellulose, cellulose and derivatives thereof, acrylic resin, alkyd resin, and polyester resin.
  • the wetting and dispersing agent is selected from the group consisting of fatty acids (oleic acid, stearic acid, etc.), amide derivatives of fatty acids (oleic acid amide, stearic acid amide, etc.), ester derivatives of fatty acids, polyethylene wax, poly At least one of ethylene glycol is mainly used to assist dispersion of the inorganic powder in the organic vehicle.
  • the thixotropic agent is selected from the group consisting of hydrogenated castor oil derivatives, polyamide wax, polyurea, fumed silica, or two or more, mainly used to improve the contact of the front conductive silver paste in the printing process. Denaturation, when the silver paste is sheared during the printing process, the consistency becomes small, and it is easy to screen-print. When the shearing is stopped, the consistency is increased to ensure the electrode has an excellent aspect ratio.
  • the other functional auxiliary is selected from the group consisting of polymethylphenylsiloxane, polyphenylsiloxane, phthalate (such as diethyl phthalate, dibutyl phthalate) And so on, at least one of microcrystalline wax, polydimethylsiloxane, polyvinyl butyral (PVB), polyether polyester-modified organosiloxane, and alkyl-modified organosiloxane.
  • the other functional additives may be added according to requirements, such as adding microcrystalline wax to reduce surface tension, adding dibutyl phthalate (DBP), etc. to improve the flexibility of the front conductive silver paste, adding polyvinyl alcohol Butanal (PVB) and the like improve adhesion.
  • the glass frit is one or a mixture of leaded glass powder and lead-free glass powder.
  • the leaded glass powder is 100% by weight, and includes the following components:
  • the added element in the oxide of the added element is titanium, smear, silver, chromium, bismuth, copper, bismuth, vanadium, sodium, ancestor, bismuth, bromine, cobalt, ruthenium, osmium, iridium, iron, Bismuth, manganese, tin, nickel, tin, arsenic, wrong, One or two or more of potassium, phosphorus, indium, gallium, germanium, silicon, boron, zinc, tungsten, magnesium, and the like.
  • the lead-free glass powder is 100% by weight, and includes the following components:
  • the added element in the oxide of the added element is titanium, smear, silver, chromium, bismuth, copper, bismuth, vanadium, sodium, ancestor, bismuth, bromine, cobalt, ruthenium, osmium, iridium, iron, One or two or more of ruthenium, manganese, tin, nickel, tin, arsenic, potassium, phosphorus, indium, gallium, germanium, silicon, boron, zinc, tungsten, magnesium, and the like.
  • the present invention also provides a method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell.
  • a method for preparing a conductive silver paste on a front side of a crystalline silicon solar cell includes at least the following steps:
  • Step S01 The glass frit raw material component is melted to obtain a glass frit melt, and the molten liquid is quenched to obtain a glass frit particle, and is crushed to obtain a glass powder having a particle diameter of 0.1 to 5.
  • Step S02. The organic carrier raw material is placed in an environment of 40 to 100 ° C for mixing treatment to obtain an organic carrier;
  • Step S03. The metal powder is mixed with the glass powder powder obtained in step S01, the organic vehicle obtained in step S02, and the silicone oil to obtain a conductive silver paste on the front side of the crystalline silicon solar cell.
  • the organic carrier can be prepared by the following method: the raw material of the organic carrier is weighed according to the weight ratio of the organic carrier raw materials, and the weighed organic carrier raw material is placed in the container at 40 ⁇ 100 ° C The mixture was stirred and mixed at a temperature of 100 to 160 minutes to obtain an organic vehicle.
  • the glass frit is one or a mixture of lead-containing glass powder and lead-free glass powder.
  • the glass frit is crystalline, amorphous or a mixture of amorphous and crystalline.
  • the glass frit can be prepared by the following method:
  • the glass frit raw material is weighed according to the raw material ratio as described above and uniformly mixed; the uniformly mixed glass frit raw material is placed in a heating furnace and heated to 900-1100 ° C, and is kept at 900-1100 ° C 60 ⁇ 180min, obtaining molten liquid glass powder; quenching the molten liquid glass powder to obtain glass powder particles; drying the glass powder particles at a temperature of 60-80 ° C; The dried glass powder particles are crushed to obtain a glass powder having a particle size of 0.5 to 5. (Vm, and then dried at 80 to 100 ° C to obtain a dried glass powder.
  • the quenching method is to pour the molten liquid glass powder into water at 5 to 25 ° C for cooling or flowing.
  • the room temperature air is cooled, and the flowing room temperature air temperature is 25 ° C or below.
  • the method for fabricating the conductive silver paste on the front side of the crystalline silicon solar cell of the present invention further has the following alternative method:
  • the organic vehicle is first mixed with the silicone oil to obtain a first mixture, and then the glass powder and the metal powder are added to the first mixture to be ground to obtain a crystalline silicon solar cell.
  • the front electrode is conductive silver paste.
  • the organic vehicle is mixed with the silicone oil to obtain a first mixed material
  • the glass frit is mixed with the metal powder by ball milling to obtain a second mixed material
  • the first mixed material is obtained.
  • a mixture material and a second mixture material are subjected to a mask treatment to obtain a conductive silver paste for the front electrode of the crystalline silicon solar cell.
  • the glass frit and the organic vehicle are mixed to obtain a first mixture, and then the metal powder, the silicone oil is added to the first mixture, and then ground to obtain a front electrode of the crystalline silicon solar cell.
  • Conductive silver paste is added to the first mixture, and then ground to obtain a front electrode of the crystalline silicon solar cell.
  • the metal powder and the organic carrier are first mixed to obtain a first mixture, and then the glass powder, the silicone oil is added to the first mixture, and then ground to obtain a front electrode of the crystalline silicon solar cell.
  • Conductive silver paste is first mixed to obtain a first mixture, and then the glass powder, the silicone oil is added to the first mixture, and then ground to obtain a front electrode of the crystalline silicon solar cell.
  • the present invention also provides a method for fabricating a front electrode of a crystalline silicon solar cell.
  • the fabrication method relates to a crystalline silicon semiconductor device having an insulating film superposed on its surface, the structure of the crystalline silicon semiconductor device is as shown in FIG. 4, and 100 is a crystalline silicon cell sheet having a first surface and a second surface.
  • a P/N junction 200, an insulating film 300, and a front electrode 700 are sequentially stacked outwardly on the first surface, and a backside silver paste 500 and a back aluminum paste 600 are printed on the second surface, wherein the insulating film 300 may be nitrogen.
  • the method for fabricating the front electrode of the crystalline silicon solar cell includes at least the following steps:
  • step S04. providing a crystalline silicon semiconductor device having an insulating film 300 on its surface;
  • Step S05 The crystalline silicon solar cell front conductive silver paste 400 according to any one of the above aspects is prepared by screen printing (wherein 401 is metal powder, 402 is organic carrier and silicone oil, and 403 is glass powder). Printed on the surface of the insulating film 300;
  • Step S06 sequentially drying, sintering, and cooling the crystalline silicon semiconductor device processed in step S05.
  • the crystalline silicon solar cell front electrode 700 is obtained.
  • the drying temperature is 80 to 400 ° C
  • the sintering temperature is 700 to 820 ° C
  • natural cooling is performed.
  • the present invention still further provides a crystalline silicon solar cell using the front surface electrode of a crystalline silicon solar cell as described above.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprises the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • polyamide wax 1% polymethylphenylsiloxane 0.5%
  • the preparation method of the organic carrier is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6 o °c.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten liquid is quenched to obtain glass frit particles, and the crushed particle size is obtained at 0. Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • the conductive silver paste on the front side of the crystalline silicon solar cell is obtained.
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the conductive silver paste on the front side of the crystalline silicon solar cell of Embodiment 1 is printed by screen printing.
  • the front surface of the crystalline silicon solar cell of the insulating film, the back surface of the solar cell is screen printed with back silver and back aluminum, and then sintered at 770 ° C to obtain the front surface electrode of the crystalline silicon solar cell, and the screen screen negative grid
  • the opening is 23pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprises the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • Polyamide wax 1% Polymethylphenylsiloxane 0.5% ;
  • the preparation method of the organic vehicle is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6 o °c.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Embodiment 2 is printed on the front surface of the crystalline silicon solar cell having the insulating film by screen printing, and the back surface of the solar cell is screen printed with the back silver and the back.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprising the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • Polyamide wax 1% Polymethylphenylsiloxane 0.5% ;
  • the preparation method of the organic vehicle is as follows: the organic carrier raw material is weighed according to the ratio described above, and mixed and mixed at 25-6 o °c.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Embodiment 3 is printed on the front surface of the crystalline silicon solar cell with the insulating film by screen printing, and the back surface of the solar cell is screen printed with the back silver and the back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a crystalline silicon solar cell front conductive silver paste calculated according to the total weight of 100 parts, comprises the following composition ratio components: silver powder 87.5 parts; organic carrier 10.0 parts; glass powder 2.5 parts. [0130] wherein, based on the total weight of the organic vehicle, 100%, the following weight components are included:
  • the preparation method of the organic vehicle is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell includes the following steps:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Example 4 was printed on the front surface of the crystalline silicon solar cell with an insulating film by screen printing, and the back surface of the solar cell was screen printed with back silver and back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprising the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • the preparation method of the organic vehicle is as follows: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Embodiment 5 is printed on the front surface of the crystalline silicon solar cell with the insulating film by screen printing, and the back surface of the solar cell is screen printed with the back silver and the back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprises the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • the preparation method of the organic carrier is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6 o °c.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprising the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • Polyamide wax 1% polymethylphenylsiloxane 0.5%; [0187] polyvinyl butyral 1%; methyl silicone oil 0.5%.
  • the preparation method of the organic vehicle is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6 o °c.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder.
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Embodiment 7 is printed on the front surface of the crystalline silicon solar cell having the insulating film by screen printing, and the back surface of the solar cell is screen printed with the back silver and the back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated according to the total weight of 100 parts, comprising the components of the following formulation ratio: 87.5 parts of silver powder; 9.7 parts of organic vehicle; 2.5 parts of glass powder, 0.3 parts of methyl silicone oil. Wherein, based on 100% by weight of the total weight of the organic vehicle, the following weight components are included:
  • Polyamide wax 1% Polymethylphenylsiloxane 0.5% ;
  • the preparation method of the organic vehicle is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6 o °c. [0204]
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain glass frit particles. And after crushing to obtain a particle size of 0 Glass powder powder.
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Example 8 was printed on the front side of the crystalline silicon solar cell with an insulating film by screen printing, and the back surface of the solar cell was screen printed with back silver and back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated according to the total weight of 100 parts, comprising the components of the following formulation ratio: 87.5 parts of silver powder; 8.5 parts of organic vehicle; 2.5 parts of glass powder, 1.5 parts of methyl silicone oil. Wherein, based on 100% by weight of the total weight of the organic vehicle, the following weight components are included:
  • the preparation method of the organic vehicle is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder.
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Example 9 was printed on the front surface of the crystalline silicon solar cell with an insulating film by screen printing, and the back surface of the solar cell was screen printed with back silver and back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated based on 100 parts by weight, comprises the following composition ratio components: 86.5 parts of silver powder; 8.0 parts of organic vehicle; 2.5 parts of glass powder, 3 parts of methyl silicone oil. Wherein, based on 100% by weight of the total weight of the organic vehicle, the following weight components are included:
  • the preparation method of the organic vehicle is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Granules, and after Broken to obtain particle size at 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell includes the following steps:
  • the front surface conductive silver paste of the crystalline silicon solar cell in Embodiment 10 is printed on the front surface of the crystalline silicon solar cell having the insulating film by screen printing, and the back surface of the solar cell is screen printed with the back silver and the back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a crystalline silicon solar cell front conductive silver paste calculated according to the total weight of 100 parts, comprising the following composition ratio components: 85 parts of silver powder; 7.5 parts of organic carrier; 2.5 parts of glass powder, 5 parts of methyl silicone oil , based on the total weight of the organic vehicle, 100%, including the following weight components:
  • Polyamide wax 1% Polymethylphenylsiloxane 0.5% ;
  • the preparation method of the organic carrier is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass frit comprising the following weight components, based on 100% by weight:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder.
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps: [0252] 85 parts of silver powder, 2.5 parts of glass powder, 7.5 parts of organic carrier, and 5 parts of methyl silicone oil were weighed according to the above formula weight ratio, and uniformly mixed and polished to obtain the front surface of the crystalline silicon solar cell. Conductive silver paste.
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell of Example 11 was printed on the front side of a crystalline silicon solar cell having an insulating film by screen printing, and the back surface of the solar cell was screen printed with back silver and back.
  • Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated according to the total weight of 100 parts, comprising the components of the following formulation ratio: 87.5 parts of silver powder; 10.0 parts of organic vehicle; 2.5 parts of glass powder.
  • Polyamide wax 1% Polymethylphenylsiloxane 0.5% ;
  • the preparation method of the organic vehicle is as follows: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder;
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front surface conductive silver paste of the crystalline silicon solar cell in Comparative Example 1 was printed on the front side of a crystalline silicon solar cell having an insulating film by screen printing, and the back surface of the solar cell was screen printed with back silver and back Aluminum was then sintered at 770 ° C to obtain the front electrode of the crystalline silicon solar cell, the screen screen secondary gate opening being 23 pm.
  • the obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • a conductive silver paste on the front side of a crystalline silicon solar cell calculated on the basis of a total weight of 100 parts, comprises the components of the following formulation ratio: 87.5 parts of silver powder; 9.0 parts of organic vehicle; 2.5 parts of glass powder.
  • Polyamide wax 1% polymethylphenylsiloxane 0.5%
  • the preparation method of the organic carrier is: the organic carrier raw material is weighed according to the ratio described above, and is prepared by mixing and stirring at 25-6° C.
  • the glass frit is a leaded glass powder, and the total weight component is 100% by weight, including the following weight components:
  • the glass frit raw material component is weighed according to the above ratio, and melted to obtain a glass frit melt, and the molten metal is quenched to obtain a glass frit. Particles, and after crushing, the particle size is 0 Glass powder powder.
  • the method for preparing the conductive silver paste on the front side of the crystalline silicon solar cell comprises the following steps:
  • the conductive silver paste on the front side of the crystalline silicon solar cell is obtained.
  • a method for fabricating a front electrode of a crystalline silicon solar cell comprising the steps of:
  • the front side conductive silver paste of the crystalline silicon solar cell in Comparative Example 2 was printed on the front side of the crystalline silicon solar cell with an insulating film by screen printing, and the back surface of the solar cell was screen printed with back silver and back Aluminum, of course After sintering at 770 ° C, the front side electrode of the crystalline silicon solar cell was obtained, and the screen screen secondary gate opening was 23 pm. The obtained cell sheets were measured for efficiency, and the results are summarized in Table 1.
  • Example 1 ⁇ 11 and Comparative Example 1 ⁇ 2 obtained performance statistics of crystalline silicon solar cells
  • the solar cell sheets of Examples 1 to 5 have the advantages of high conversion rate and high current.
  • the organic vehicle used in the description of Examples 1-5 has superior printing properties.
  • the solar cell of Example 6 has low conversion rate, high Rs and high current, and the content of silicone oil in the organic carrier is 40%, and the content of silicone oil in the silver paste is 4%, indicating silver paste. If the content of the silicone oil is too high, the solar cell Rs will rise and the efficiency will decrease.
  • the solar cell sheet of Example 7 has a low conversion rate and a low current, indicating that the content of the silicone oil in the silver paste is less than 0.05%, which causes the solar cell current to decrease and the efficiency to decrease.
  • Examples 8-11 were the direct addition of silicone oil in the preparation of the front conductive silver paste. It can be seen from Table 1 that the solar cell sheets of Examples 8-10 have high efficiency, and the amount of silicone oil added is 0.3%, 1.5%, and 3.0%, respectively. The solar cell of Example 11 has low efficiency and high Rs. The amount of silicone oil added was 5.0%. The results of Examples 8-11 show that the amount of silicone oil added to the front conductive silver paste is moderate, and too high causes the cell sheet Rs to rise and the efficiency to decrease.
  • Comparative Example 1 has very low efficiency and high Rs.
  • the secondary gate appearance after printing and sintering has found that the width of the sub-gate of Example 1 is narrow and the surface is relatively flat.
  • the high aspect ratio indicates that the front conductive silver paste of Example 1 has good printing performance.
  • the appearance of the sub-gate after printing and sintering found that the width of the sub-gate of Comparative Example 1 is wide, the fluctuation of high and low is relatively large, and there are many breakpoints and short points, indicating that the printing performance of the front conductive silver paste of Comparative Example 1 is not good, in the 23-opening The screen is not printed very well.
  • FIG. 6A is a photograph of a front electrode after printing and sintering in Example 1, and it can be seen that the width of the sub-gate is 29.6 pm and the height is 15.412 pm.
  • FIG. 6B is a photograph of the front electrode after printing and sintering of Comparative Example 1, and it can be seen that the sub-gate thereof The width is 43.4pm and the height is 15.903pm. It can be seen that the front electrode grid line width of Example 1 is narrower than the gate line width of Comparative Example 1 by 13.8 pm, which is why the implementation 1 current is significantly higher than that of Comparative Example 1, in which the organic carrier and the silver paste of Example 1 are used. Each contained 3% and 0.3% of silicone oil, and the organic vehicle and silver paste of Comparative Example 1 did not contain silicone oil.
  • Comparative Example 2 has very low efficiency and Rs is very high.
  • the secondary gate appearance after printing and sintering shows that the width of the sub-gate of Comparative Example 2 is about 44 pm, and the height is low and low. Larger, there are a lot of breakpoints and short points, indicating that the positive conductive silver paste printing performance of Comparative Example 2 is not good, the net opened at 23pm The version is not printed very well.
  • the sub-gate width of the embodiment 10 is about 3 (Vm, the surface is relatively flat, and has a high aspect ratio, indicating that the front side conductive silver paste of the embodiment 10 has good printing performance, wherein the front side of the tenth embodiment is good.
  • the conductive silver paste contained 3% of silicone oil, and the front conductive silver paste of Comparative Example 2 did not contain silicone oil.

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Abstract

La présente invention concerne une pâte d'argent conductrice pour la surface avant d'une photopile en silicium cristallin et son procédé de préparation, ainsi qu'une photopile. La pâte d'argent conductrice pour la surface avant d'une photopile en silicium cristallin comprend les matières premières suivantes en partie en poids : 80,0 ~ 93,0 parties de poudre métallique ; 6,0 ~ 15,0 parties de support organique ; 1,0 ~ 5,0 parties de poudre de verre ; et 0,06 ~ 3,75 parties d'huile de silicone ; l'huile de silicone est au moins une huile choisie dans le groupe consistant en huile de silicone de méthyle, huile de silicone d'éthyle, huile de silicone de phényle, huile de silicone contenant de l'hydrogène de méthyle, huile de silicone de méthyle et de phényle, huile de silicone de méthyle et de chlorophényle, huile de silicone de méthyléthyloxy, huile de silicone de méthyle et de trifluoropropyle, huile de silicone méthylvinylique, huile de silicone de méthylhydroxy, huile de silicone contenant de l'hydrogène d'éthyle, huile de silicone contenant de l'hydroxy-hydrogène et huile de silicone contenant du cyanure. La pâte d'argent conductrice a d'excellentes performances de sérigraphie d'écran à mailles de grille fines, peut être imprimée sur une plaque de sérigraphie ayant une ouverture de 23 µm, et obtient finalement une électrode de surface avant ayant un excellent facteur de forme, de telle sorte que la photopile présente les caractéristiques d'un courant élevé et d'un taux de conversion élevé.
PCT/CN2018/088855 2018-04-28 2018-05-29 Pâte d'argent conductrice pour la surface avant d'une photopile en silicium cristallin et son procédé de préparation, et photopile WO2019205223A1 (fr)

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CN115477896B (zh) * 2021-06-15 2024-06-07 天合光能股份有限公司 一种涂层液及其制备方法和应用
CN115083659A (zh) * 2022-07-20 2022-09-20 常州聚和新材料股份有限公司 用于激光转印的导电浆料、其制备方法及应用
CN115910422A (zh) * 2022-12-15 2023-04-04 广州市儒兴科技股份有限公司 一种导电银浆及其制备方法与应用

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