CN111509085A - Spraying system for preparing ultra-high-efficiency solar cell electrode and application thereof - Google Patents
Spraying system for preparing ultra-high-efficiency solar cell electrode and application thereof Download PDFInfo
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- 238000005507 spraying Methods 0.000 title claims abstract description 95
- 239000002002 slurry Substances 0.000 claims abstract description 81
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 238000003860 storage Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000010344 co-firing Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 43
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract description 4
- 229910000510 noble metal Inorganic materials 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000007639 printing Methods 0.000 description 7
- 238000007650 screen-printing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 101100409194 Rattus norvegicus Ppargc1b gene Proteins 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 230000005641 tunneling Effects 0.000 description 1
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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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/14—Multicolour printing
- B41M1/18—Printing one ink over another
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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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
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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
- H01L31/022433—Particular geometry of the grid contacts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- 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
Abstract
The invention relates to a spraying system for preparing an ultra-high-efficiency solar cell electrode and application thereof, wherein the system comprises a slurry storage device (1), a spraying device (2) and a mask (3), the slurry storage device (1) is connected with the spraying device (2) through a pipeline, and the mask (3) is arranged between the spraying device (2) and the solar cell electrode. The system comprises the following steps: (1) fully mixing the slurry; (2) manufacturing a seed layer; (3) manufacturing a conductive transmission layer; (4) a co-firing process: and after the grid line (4) is manufactured, heating and sintering the electrode to form the ultra-efficient solar cell electrode. Compared with the prior art, the multilayer electrode manufactured by the invention has good electrode compactness and good accumulation leveling property of the grid line electrode, is beneficial to current transmission, reduces the consumption of noble metal, greatly saves the cost and improves the operation yield.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a spraying system for preparing an ultra-high-efficiency solar cell electrode and application thereof.
Background
At present, with continuous innovation and development of photovoltaic power generation technology, the requirement on the photoelectric conversion efficiency is higher and higher. On one hand, on a silicon-based battery, such as the existing Perc (passivated emitter back contact) technology, the HIT (heterojunction battery) technology, the Topcon (tunneling oxide layer passivated battery) technology, the N-type technology and the like, process improvement is required, and on the other hand, adjustment is required on a printing process, and the main method is to reduce grid lines, namely the width of an electrode, and simultaneously increase the grid lines, namely the height of the electrode, so that the main purpose is to reduce shading loss and reduce series resistance, thereby improving the photoelectric conversion efficiency.
Aiming at the current solar cell electrode preparation process, the traditional screen printing process is mainly adopted, and the aims of improving the grid line type and the optimal height-width ratio are achieved by adjusting screen printing parameters or processes such as the number of screen printing screens, the wire diameter of the screen printing screens, the width of grid lines, the thickness of emulsion and the like on the aspect of improving the conversion rate of the electrode. In recent two years, the development of the technology without net knots, with low net knots or with few net knots reduces the number of wefts to a certain extent, but the number of warps is always inevitable, and meanwhile, due to the difference of the leveling performances of different pastes, the electrode cannot reach the optimal form, as shown in fig. 4, so that the application of the conversion efficiency on the electrode is not brought into play to the best.
The existing electrode is made of single noble metal, the cost is high, the electrode is formed in one step through printing, the horizontal height difference distribution is large after the electrode is formed, the height is low, the resistance value is easy to be higher, the electronic transmission is influenced, and the conversion efficiency is limited, as shown in figures 5-6.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the spraying system for preparing the ultra-high-efficiency solar cell electrode and the application thereof, wherein the spraying system has good electrode compactness and good accumulation and leveling property of the grid line electrode, is beneficial to current transmission, reduces the consumption of noble metals, greatly saves the cost and improves the operation yield.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a spraying system for preparation of super high-efficient solar cell electrode, this system include thick liquids storage device, spraying device and avoid the mask of the regional pollution outside the grid line, thick liquids storage device and spraying device pass through the pipe connection, the mask locate between spraying device and the solar cell electrode.
Furthermore, the solar cell electrode comprises a grid line, a carrier and a substrate, wherein the grid line is positioned above the carrier, the carrier is positioned above the substrate, and the mask is arranged between the spraying device and the carrier. And dispersing the slurry in the slurry storage device to enable the slurry to be in a rotary bleaching state, and then spraying the slurry through a spraying device to penetrate through a mask to form a grid line on the carrier, so that the ultra-efficient solar cell electrode is manufactured.
Furthermore, the grid line comprises a seed layer and a conductive transmission layer for current collection and transmission, the seed layer is abutted with the carrier, so that the slurry and the carrier form an electrode base layer, a metal contact layer is formed through a sintering process to achieve good ohmic contact, and the conductive transmission layer is abutted with the seed layer.
Further, the slurry storage device comprises a seed layer slurry tank and at least two conducting layer slurry tanks, wherein the seed layer slurry tank and the auxiliary slurry tank are respectively connected with the spraying device through pipelines, seed slurry for spraying to form a seed layer is stored in the seed layer slurry tank and mainly comprises high-conductivity materials such as silver and the like, different solid contents, different viscosities or different materials are stored in different conducting layer slurry tanks, and finally various conducting layer slurries for spraying to form a conducting transmission layer are combined and sprayed.
Further, thick liquids storage device include seed layer thick liquids jar, first conducting layer thick liquids jar and second conducting layer thick liquids jar, seed layer thick liquids jar, first conducting layer thick liquids jar and second conducting layer thick liquids jar respectively through first pipeline, second pipeline and third pipeline and spraying device pipe connection, first pipeline, second pipeline and third pipeline be equipped with first valve, second valve and third valve respectively.
Furthermore, the spraying device comprises a movable spray head converter, and the spray head converter is provided with a seed layer spray head with a variable spraying radius and at least two conductive layer spray heads. In the spraying process, the running track of the spray head converter is determined by referring to the size of the mask, if the spraying radius of any spray head can reach the size of the mask, each spray head can be changed only in a rotation and alternation mode, and if the spraying radius of any spray head cannot reach the size of the mask, the spray head can realize spraying by adopting a line-by-line scanning mode or a printing carrier automatic scanning mode through the movement of the spray head converter, so that slurry is sprayed on a carrier according to the design requirement to gradually form a grid line.
Furthermore, the spraying device comprises a movable nozzle converter, and the nozzle converter is provided with a seed layer nozzle with a variable spraying radius, a first conductive layer nozzle and a second conductive layer nozzle.
Furthermore, the mask is provided with hollow stripes matched with the grid lines in shape, the hollow stripes can be matched in shape according to the design patterns of the grid lines, and the mask has the main function of better protecting the areas except the grid lines, so that pollution to other areas is avoided, and the product yield can be well improved.
The application of the spraying system for preparing the ultra-high-efficiency solar cell electrode, which is applied to the preparation of the ultra-high-efficiency solar cell electrode, comprises the following steps:
(1) starting the device; starting the storage device to enable the seed layer slurry tank and the auxiliary slurry tank to be in a high-pressure floating state and to be fully mixed;
(2) manufacturing a seed layer: opening a first valve to enable the seed layer slurry to pass through a first pipeline and enter a spray head converter, then enabling a spray head of the seed layer to be aligned with a carrier, and carrying out line-by-line scanning spraying operation to obtain the seed layer; the spraying film thickness of the seed layer is controlled to be 5 +/-2 mu m;
(3) manufacturing a conductive transmission layer: changing the mask, enabling the conducting layer slurry in the conducting layer slurry tank to enter a spray head converter through a pipeline, then enabling the conducting layer spray head to be aligned to the seed layer, and carrying out line-by-line scanning spraying operation to obtain a conducting transmission layer so as to finish the manufacture of the grid line;
(4) a co-firing process: and after the grid line is manufactured, heating and sintering the electrode by using a high-temperature multi-section sintering furnace to form the ultra-high-efficiency solar cell electrode. The seed layer and the carrier form good ohmic contact, and meanwhile, the conductive transmission layer forms metal alloy, so that the conductive transmission layer has good conductivity.
Further, the time for sufficient mixing is 20-30min, the mixing time is set according to the solid content of the slurry, the viscosity setting and other characteristics, the scanning spraying pressure is 60-100N, and the temperature for heating and sintering is 700-760 ℃.
Compared with the prior art, the invention has the following advantages:
(1) different solid contents, different viscosities or different materials are stored in different conducting layer slurry tanks, and finally various conducting layer slurries for forming a conducting transmission layer are combined and sprayed, so that multilayer accumulation of grid lines can be formed, the compactness of the sintered grid lines is further improved, the line type of the grid lines is optimized, and the optimal height-width ratio is achieved, so that current transmission is provided to the maximum extent, and shading loss caused by factors such as grid line collapse is reduced;
(2) the spraying device is provided with a movable nozzle converter, so that in the spraying process, the running track of the nozzle converter is determined by referring to the size of a mask, if the spraying radius of any nozzle can reach the size of the mask, each nozzle can be changed only in a rotary and alternate change mode, and if the spraying radius of any nozzle cannot reach the size of the mask, the nozzle can be moved by the nozzle converter, so that the nozzle can realize spraying in a line-by-line scanning mode or a printing carrier automatic scanning mode, slurry is sprayed on a carrier according to design requirements, grid lines are gradually formed, and the movable and scannable characteristics of the spraying device enable the grid lines to be prepared more flexibly and the size to be more controllable;
(3) the mask is provided with hollow stripes matched with the grid lines in shape, the hollow stripes can be matched in shape according to the design pattern of the grid lines, and the mask has the main function of better protecting the areas except the grid lines, so that pollution to other areas is avoided, and the product percent of pass can be well improved;
(4) the invention is completely different from the prior printing process, adopts high-pressure spraying to manufacture a plurality of conductive transmission layers, ensures that the integral compactness of the electrode is good, the accumulation leveling property of the grid lines is good, and is beneficial to the transmission of current; meanwhile, the multilayer stacked grid lines are not easy to collapse, the shading loss after sintering is reduced, and the photoelectric conversion efficiency is greatly improved;
(5) the thickness of the seed layer can be accurately controlled to be 5 +/-2 mu m by a spraying method when the seed layer is prepared in advance, the dosage of the seed layer slurry used at the moment is less than 1/3 of the dosage used in the prior art, and the cost is saved. When the conductive transmission layer is prepared, the height of the grid line is accumulated by adopting a layer-by-layer spraying method, and the steps which can be completed at one time are realized step by step, so that the error of each step is basically less than 0.3 mu m or lower, the compactness of the grid line can be improved, and the collapse and deformation of the grid line are avoided; the multilayer grid line prepared by spraying can reduce the series resistance, improve the filling factor and improve the conversion efficiency;
(6) the other benefit of the layer-by-layer scanning spraying is that the height fluctuation fall of each grid line is reduced, the general printing mode is difficult to control, and the height fall of each grid line is 5 mu m or more, and by adopting the step-by-step spraying operation mode, the height difference of each grid line can be controlled within 2-3 mu m, so that the area of a transmission section is increased, and the transmission resistance is reduced;
(7) the invention adopts various mixed metals to manufacture the electrode, reduces the consumption of noble metals, greatly saves cost, reduces the requirement on slurry, does not need the slurry to have better molding and overhigh solid content, and simultaneously has the protection of a mask, thereby reducing the pollution of a silicon wafer and improving the operation yield.
Drawings
FIG. 1 is a schematic view of a spray coating system according to example 1;
FIG. 2 is a schematic view of a grid line formed by spraying the schematic view of the spraying system in example 1;
FIG. 3 is a cross-sectional view of a grid line formed by spray coating using the schematic diagram of the spray coating system of example 1;
FIG. 4 is a schematic view of a prior art screen printing apparatus;
FIG. 5 is a schematic view of a grid line formed by a screen printing apparatus according to the prior art;
FIG. 6 is a cross-sectional view of a grid line formed by a prior art screen printing apparatus;
the reference numbers in the figures indicate: the device comprises a slurry storage device 1, a seed layer slurry tank 11, a first pipeline 111, a first valve 112, a first conducting layer slurry tank 12, a second pipeline 121, a second valve 122, a second conducting layer slurry tank 13, a third pipeline 131, a third valve 132, a spraying device 2, a spray head converter 21, a seed layer spray head 211, a first conducting layer spray head 212, a second conducting layer spray head 213, a mask 3, hollow stripes 31, grid lines 4, a seed layer 41, a conductive transmission layer 42, a carrier 5 and a substrate 6.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
A spraying system for preparing an ultra-high-efficiency solar cell electrode is shown in figure 1 and comprises a slurry storage device 1, a spraying device 2 and a mask 3 for preventing the area outside a grid line 4 from being polluted, wherein the slurry storage device 1 and the spraying device 2 are connected through a pipeline, and the mask 3 is arranged between the spraying device 2 and the solar cell electrode.
The solar cell electrode comprises a grid line 4, a carrier 5 and a substrate 6, wherein the grid line 4 is positioned above the carrier 5, the carrier 5 is positioned above the substrate 6, and the mask 3 is arranged between the spraying device 2 and the carrier 5. The slurry is dispersed in the slurry storage device 1 to be in a rotary bleaching state, and then the slurry is sprayed by the spraying device 2 to penetrate through the mask 3 to form the grid line 4 on the carrier 5, so that the ultra-efficient solar cell electrode is manufactured. The gate line 4 includes a seed layer 41 and a conductive transmission layer 42 for current collection and transmission, the seed layer 41 is abutted to the carrier 5, so that the paste and the carrier 5 form an electrode base layer, a metal contact layer is formed through a sintering process to achieve good ohmic contact, and the conductive transmission layer 42 is abutted to the seed layer 41. The conductive transport layer 42 contains three sublayers.
The slurry storage device 1 comprises a seed layer slurry tank 11, a first conducting layer slurry tank 12 and a second conducting layer slurry tank 13, wherein the seed layer slurry tank 11, the first conducting layer slurry tank 12 and the second conducting layer slurry tank 13 are respectively connected with the spraying device 2 through a first pipeline 111, a second pipeline 121 and a third pipeline 131, and the first pipeline 111, the second pipeline 121 and the third pipeline 131 are respectively provided with a first valve 112, a second valve 122 and a third valve 132. The seed slurry for forming the seed layer 41 by spraying is stored in the seed layer slurry tank 11, mainly made of high-conductivity materials such as silver, and the like, different solid contents, different viscosities or different materials are stored in the first conducting layer slurry tank 12 and the second conducting layer slurry tank 13, and finally various conducting layer slurries for forming the conducting transmission layer 42 by spraying are combined and sprayed.
The spray device 2 includes a movable nozzle changer 21, and the nozzle changer 21 is provided with a seed layer nozzle 211, a first conductive layer nozzle 212, and a second conductive layer nozzle 213, which have variable spray radii. In the spraying process, the running track of the nozzle converter 21 is determined by referring to the size of the mask 3, if the spraying radius of any nozzle can reach the size of the mask 3, each nozzle can be changed only in a rotation alternating manner, and if the spraying radius of any nozzle cannot reach the size of the mask 3, the nozzle can realize spraying by the movement of the nozzle converter 21 in a manner similar to line-by-line scanning or a printing carrier automatic scanning manner, so that the slurry is sprayed on the carrier 5 according to the design requirement to gradually form the grid line 4.
The mask 3 is provided with the hollow stripes 31 matched with the grid lines 4 in shape, the hollow stripes 31 can be matched in shape according to the design patterns of the grid lines 4, and the mask has the main function of better protecting the areas except the grid lines 4, so that pollution to other areas is avoided, and the product percent of pass is well improved.
The spray coating system described above was used to produce a very efficient solar cell electrode having a conductive transmission layer 42 comprising three sublayers, as shown in fig. 2-3, comprising the steps of:
(1) starting the device; starting the storage device 1 to enable the seed layer slurry tank 11 and the auxiliary slurry tank to be in a high-pressure floating state and to be fully mixed, wherein the time for full mixing is 20-30min, and the mixing time is set according to the solid content, viscosity setting and other characteristics of the slurry;
(2) manufacturing a seed layer: opening a first valve 112 to enable the seed layer slurry to pass through a first pipeline 111 and enter a spray head converter 21, then enabling a seed layer spray head 211 to aim at the carrier 5, and carrying out line-by-line scanning spraying operation, wherein the scanning spraying pressure is 60-100N, so as to obtain a seed layer 41; the spraying film thickness of the seed layer 41 is controlled to be 5 +/-2 mu m;
(3) manufacturing a first sublayer of the conductive transmission layer: replacing the mask 3, opening the second valve 122, making the conductive layer slurry in the first conductive layer slurry tank 12 enter the spray head converter 21 through the second pipeline 121, then making the first conductive layer spray head 212 aim at the seed layer 41, and performing line-by-line scanning spraying operation, wherein the scanning spraying pressure is 60-100N, so as to obtain a first sub-layer of the conductive transmission layer; the thickness of the seed layer 41 plus the first sub-layer is 10 +/-2 μm;
(4) and (3) manufacturing a second sublayer of the conductive transmission layer: replacing the mask 3, opening the third valve 132, enabling the conductive layer slurry in the second conductive layer slurry tank 13 to enter the spray head converter 21 through the third pipeline 131, and enabling the second conductive layer spray head 213 to perform line-by-line scanning spraying operation on the first sub-layer of the conductive transmission layer, wherein the scanning spraying pressure is 60-100N, so as to obtain a second sub-layer of the conductive transmission layer; the thickness of the seed layer 41, the first sub-layer and the second sub-layer is 15 +/-1.5 mu m;
(5) and (3) manufacturing a third sublayer of the conductive transmission layer: replacing the mask 3, opening the second valve 122, making the conductive layer slurry in the first conductive layer slurry tank 12 enter the spray head converter 21 through the second pipeline 121, then making the first conductive layer spray head 212 aim at the second sublayer of the conductive transmission layer, and performing line-by-line scanning spraying operation, wherein the scanning spraying pressure is 60-100N, so as to obtain the third sublayer of the conductive transmission layer; completing the manufacture of the conductive transmission layer 42, and further completing the manufacture of the gate line 4;
(6) a co-firing process: and after the grid line 4 is manufactured, the electrode is heated and sintered at the temperature of 700 plus 760 ℃ by using a high-temperature multi-section sintering furnace to form the ultra-efficient solar cell electrode. The seed layer 41 forms a good ohmic contact with the carrier 5, and the conductive transfer layer 42 forms a metal alloy, thereby having a good conductivity.
Claims (10)
1. The spraying system for preparing the ultra-high-efficiency solar cell electrode is characterized by comprising a slurry storage device (1), a spraying device (2) and a mask (3), wherein the slurry storage device (1) is connected with the spraying device (2) through a pipeline, and the mask (3) is arranged between the spraying device (2) and the solar cell electrode.
2. The spray coating system for preparing the ultra-high efficiency solar cell electrode according to claim 1, wherein the solar cell electrode comprises a grid line (4), a carrier (5) and a substrate (6), the grid line (4) is positioned above the carrier (5), the carrier (5) is positioned above the substrate (6), and the mask (3) is arranged between the spray coating device (2) and the carrier (5).
3. The spray coating system for preparing an ultra-high efficiency solar cell electrode as claimed in claim 2, wherein said grid line (4) comprises a seed layer (41) and a conductive transmission layer (42) for current collection and transmission, said seed layer (41) is in contact with the carrier (5), and said conductive transmission layer (42) is in contact with the seed layer (41).
4. The spraying system for preparing the ultra-high efficiency solar cell electrode as claimed in claim 2, wherein the mask (3) is provided with hollow stripes (31) matching with the grid lines (4) in shape.
5. The spray coating system for preparing the ultra-high efficiency solar cell electrode according to claim 1, wherein the slurry storage device (1) comprises a seed layer slurry tank (11) and at least two conductive layer slurry tanks, and the seed layer slurry tank (11) and the auxiliary slurry tank are respectively connected with the spray coating device (2) through pipelines.
6. The spraying system for preparing the ultra-high efficiency solar cell electrode as claimed in claim 1, wherein the slurry storage device (1) comprises a seed layer slurry tank (11), a first conductive layer slurry tank (12) and a second conductive layer slurry tank (13), the seed layer slurry tank (11), the first conductive layer slurry tank (12) and the second conductive layer slurry tank (13) are respectively connected with the spraying device (2) through a first pipeline (111), a second pipeline (121) and a third pipeline (131), and the first pipeline (111), the second pipeline (121) and the third pipeline (131) are respectively provided with a first valve (112), a second valve (122) and a third valve (132).
7. The spray coating system for ultra-high efficiency solar cell electrode preparation as claimed in claim 1, wherein said spray coating device (2) comprises a mobile spray head converter (21), and said spray head converter (21) is provided with a seed layer spray head (211) with a variable spray radius and at least two conductive layer spray heads.
8. The spray coating system for ultra-high efficiency solar cell electrode preparation according to claim 1, wherein said spray coating device (2) comprises a mobile spray head converter (21), and a seed layer spray head (211), a first conductive layer spray head (212) and a second conductive layer spray head (213) with variable spray radius are disposed on the spray head converter (21).
9. Use of a spray coating system for the preparation of an ultra-high efficiency solar cell electrode according to any one of claims 1 to 8, wherein the system is used for the preparation of an ultra-high efficiency solar cell electrode, comprising the steps of:
(1) starting the device; starting the storage device (1) to enable the seed layer slurry tank (11) and the auxiliary slurry tank to be in a high-pressure floating state and to be fully mixed;
(2) manufacturing a seed layer: opening a first valve (112), enabling the seed layer slurry to pass through a first pipeline (111) and enter a spray head converter (21), then enabling a seed layer spray head (211) to be aligned to a carrier (5), and carrying out line-by-line scanning spraying operation to obtain a seed layer (41);
(3) manufacturing a conductive transmission layer: replacing the mask (3), enabling the conducting layer slurry in the conducting layer slurry tank to enter a spray head converter (21) through a pipeline, then enabling a conducting layer spray head to be aligned to the seed layer (41), and carrying out line-by-line scanning spraying operation to obtain a conducting transmission layer (42), thereby completing the manufacture of the grid line (4);
(4) a co-firing process: and after the grid line (4) is manufactured, heating and sintering the electrode to form the ultra-efficient solar cell electrode.
10. The use of the spray coating system for the preparation of an ultra-high efficiency solar cell electrode as claimed in claim 9, wherein the time for thorough mixing is 20-30min, the scanning spray coating pressure is 60-100N, and the temperature for heating and sintering is 700-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254905.7A CN111509085A (en) | 2020-04-02 | 2020-04-02 | Spraying system for preparing ultra-high-efficiency solar cell electrode and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254905.7A CN111509085A (en) | 2020-04-02 | 2020-04-02 | Spraying system for preparing ultra-high-efficiency solar cell electrode and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111509085A true CN111509085A (en) | 2020-08-07 |
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