CN102544218B - Method for manufacturing positive electrode of solar cell in printing manner - Google Patents
Method for manufacturing positive electrode of solar cell in printing manner Download PDFInfo
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- CN102544218B CN102544218B CN2012100126250A CN201210012625A CN102544218B CN 102544218 B CN102544218 B CN 102544218B CN 2012100126250 A CN2012100126250 A CN 2012100126250A CN 201210012625 A CN201210012625 A CN 201210012625A CN 102544218 B CN102544218 B CN 102544218B
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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
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Abstract
The invention discloses a method for preparing an electrode, in particular to a method for manufacturing a positive electrode of a solar cell in a printing manner. The method comprises the following steps of: locating an solar cell sheet on a printing platform to be fixed; moving the solar cell sheet to be under a printing head; applying a pressure onto an electrode slurry in the printing head so that the electrode slurry flows out of a nozzle of the printing head and is in contact with the upper surface of the solar cell sheet; printing a discontinuous high-aspect-ratio electrode grid line with a shape consistent with a shape of the nozzle of the printing head on the solar cell sheet after the printing platform and the printing head do motions in opposite directions; and subsequently, repeating the steps above after the printing plate and the printing head do relative motions to a proper position so as to print a continuous high-aspect-ratio electrode grid line on the solar cell sheet. The method for manufacturing the positive electrode of the solar cell in the printing manner, disclosed by the invention, has the advantages of breaking through the limitation of a traditional screen printing manner, being capable of manufacturing a positive grid line with the width of 20-80 microns, and having important industrial application prospect.
Description
Technical field
The present invention relates to a kind of preparation method of electrode, refer to that specifically a kind of printing prepares the method for front electrode of solar battery.
Technical background
Solar cell is a kind of semiconductor device that solar energy is converted to electric energy, its operation principle is: when solar light irradiation during in solar cell surface, to form new hole-duplet on the p-n junction of solar cell semiconductor device, under the effect of p-n junction electric field, hole flows to the p district by the n district, electronics flows to the n district by the p district, just forms electric current after the connection circuit.Draw for the photogenerated current that solar cell is produced, must produce positive counterelectrode on the surface of solar cell, determine that wherein the electrode of solar cell photoelectric conversion efficiency is the front electrode that electronics is drawn.
At present, the manufacture craft of front electrode of solar battery mainly contains the methods such as magnetron sputtering, plating, vacuum evaporation and silk screen printing sintering.Wherein the electrode quality of magnetron sputtering, plating and vacuum vapour deposition preparation is high, but its high cost, and preparation process is complicated, the cycle is long, speed is slow; Also can use some poisonous and harmful substances in this external electroplating process, have certain safety and health hidden danger.With respect to methods such as magnetron sputtering, plating and vacuum evaporations, the silk screen printing sintering technology has that equipment is simple, easy to operate, with low cost, safety non-toxic, be easy to form electrode, and can access good metal and semi-conductive ohmic contact, and the advantage such as in apparent good order and condition, become the main stream approach of current front electrode of solar battery preparation.
Adopt at present thin gate height that the silk screen printing sintering technology prepares front electrode of solar battery generally at 10-30 μ m, width between 60-120 μ m.In order further to improve the photoelectric conversion efficiency of solar cell, must obtain the front electrode that width is narrow, depth-width ratio is large, this be because: wider gate electrode line causes larger electrode shading-area, and less metal electrode depth-width ratio causes larger electrode resistance loss.Therefore, obtain to have the solar cell of high-photoelectric transformation efficiency, just must reduce the grid live width and improve the depth-width ratio of gate electrode.Up-to-date silk-screen printing technique carries out electrode printing by the half tone design that increases the grid line number and reduces series resistance, but increased after the number of grid line, needs to reduce just can not produce larger electrode shading-area with the width of grid line is corresponding; Yet the grid line width further will be diminished, also will guarantee simultaneously the height of gate electrode, traditional silk-screen printing technique is difficult to reach; This is mainly because silk-screen printing technique essence determines, the current wire diameter of silk screen of using is generally in 25 μ m left and right, must reduce the wire diameter of silk screen if continue the width of reduction silk screen printing, and the reduction of silk screen wire diameter can have influence on intensity and the tension force of silk screen.
On traditional silk-screened sintering process basis, some researchers disclose Chinese patent CN 101447531 A (open day 20090603) and Chinese patent CN 101807627 A (open day 20100818), by introduce the techniques such as plating and sputter in screen printing process, can prepare thin and than the grid line of large ratio of height to width, but owing to having introduced the techniques such as plating and sputter, its production cost also significantly promotes.Also have some researchers to disclose Chinese patent CN 201868440 U (open day 20110615), by the grading structure of thin grid line 40-90 μ m on width is set, realize reducing shading-area and reduce series resistance, thereby improve the photoelectric conversion efficiency of solar cell, but owing to still not changing the preparation method of grid, its effect is limited.
Summary of the invention
For deficiency of the prior art, a kind of brand-new preparation method is proposed.
The present invention is achieved by following technical proposals:
(1) solar battery sheet is placed on print platform, and by gas absorption, is fixed;
(2) print platform moves to the printhead direction, makes solar battery sheet move to the printhead below;
(3) ccd image sensor on printhead is identified the sign on solar battery sheet, thereby determines and adjust the relative position of printhead and cell piece;
(4) print platform and printhead are done move toward one another, make the distance of solar battery sheet and print-head nozzle between 1-1000 μ m;
(5) the high viscosity electrode slurry in printhead is exerted pressure, electrode slurry is flowed out in print-head nozzle, and touch the upper surface of solar battery sheet;
(6) print platform and printhead are done the rightabout motion, when its relative movement distance is 0-50 μ m, stop high viscosity electrode slurry applied pressure in printhead, electrode slurry is no longer flowed out in the nozzle of printhead, thereby print gate electrode line consistent with the print-head nozzle shape, that discontinuous, depth-width ratio is large on solar battery sheet;
(7) print platform is done relative parallel with printhead;
(8) then repeat the step of (4) to (7), thereby print gate electrode line continuous, that depth-width ratio is large on solar battery sheet.
In the present invention, described solar battery sheet is at least a in monocrystalline silicon piece, polysilicon chip, quasi-monocrystalline silicon; Described print-head nozzle is shaped as circle, square or rectangular, and whole printhead is the linear array of the consistent nozzle of single or numerous shapes; Described electrode slurry is at least a in silver slurry, copper slurry, nickel slurry or palladium-Yin slurry.
, as preferably, when the relative movement distance described in above-mentioned steps (6) is 5-40 μ m, stop high viscosity electrode slurry applied pressure in printhead; , as better selection, when relative movement distance is 15-30 μ m, stop high viscosity electrode slurry applied pressure in printhead.
Print platform in the present invention and printhead are done when mobile, and the distance of solar battery sheet and print-head nozzle is remained between certain scope; High viscosity electrode slurry in printhead is exerted pressure, electrode slurry is flowed out in print-head nozzle, and touch the upper surface of solar battery sheet; Print platform and printhead are done the rightabout motion and are surpassed certain distance, stop high viscosity electrode slurry applied pressure in printhead, electrode slurry is no longer flowed out in the nozzle of printhead, thereby print gate electrode line consistent with the print-head nozzle shape, that discontinuous, depth-width ratio is large on solar battery sheet; Print platform is done relative parallel with printhead, and its relatively move direction and relative movement distance are by program control; Print platform and printhead opposing parallel move to correct position, then repeat above-mentioned printing action, thereby print gate electrode line continuous, that depth-width ratio is large on solar battery sheet.
Beneficial effect: the present invention can overcome the bottleneck of traditional silk-screened technique, makes the height of front side grid line electrode of solar battery higher, width is narrower, can more utilize sunlight and reduce the series resistance of battery as far as possible.By reducing the size of print-head nozzle Width, can break through the limit of traditional silk-screened, obtain the front electrode of solar battery grid line of width 20-80 μ m, height 20-50 μ m, thereby significantly reduce the grid live width and improve the depth-width ratio of gate electrode; By print-head nozzle being carried out linear array design, can significantly improve the high-quality front electrode of solar battery preparation efficiency, reduce production costs.
Embodiment
The invention will be further described below in conjunction with example.
Embodiment 1
The monocrystaline silicon solar cell sheet that is of a size of 125 is placed on stamp pad and fixing, then stamp pad is moved, make solar battery sheet be placed in the printhead below, and the distance that makes solar battery sheet and print-head nozzle is at 2000 μ m; Ccd image sensor on printhead is identified the sign on the monocrystaline silicon solar cell sheet, thereby determines and adjust the relative position of printhead and cell piece; On the basis of determining relative position, print platform and printhead are done move toward one another, make the distance moving of monocrystaline silicon solar cell sheet and print-head nozzle to 10 μ m left and right; , by to exerting pressure in printhead, the electrode slurry in printhead is flowed out in print-head nozzle, and touch the upper surface of solar battery sheet; And then stamp pad and printhead are done the rightabout motion, when its relative movement distance is 50 μ m, stop electrode slurry being flowed out in the nozzle of printhead; Again stamp pad and printhead are done relative parallel, then repeat above-mentioned printing action, until print gate electrode line on solar battery sheet.
In the present embodiment, stamp pad is platform, and solar battery sheet is fixed by gas absorption on print platform; Print-head nozzle is shaped as the rectangle of width 50 μ m, length 5000 μ m, and the electrode slurry that wherein uses is starched as silver.
, by the method in the present embodiment, can print the silver electrode grid line of width 50 μ m, length 5000 μ m on the monocrystaline silicon solar cell sheet.Continue to repeat above-mentioned printing action, thereby print width 50 μ m, gate electrode line continuous, that depth-width ratio is large on the monocrystaline silicon solar cell sheet.
Embodiment 2
The method similar to embodiment 1, be placed on the monocrystaline silicon solar cell sheet that is of a size of 125 on print platform, and by gas absorption, be fixed; Print platform moves to the printhead direction, makes solar battery sheet move to printhead below, and the distance that makes solar battery sheet and print-head nozzle is at 1000 μ m; Ccd image sensor on printhead is identified the sign on the monocrystaline silicon solar cell sheet, thereby determines and adjust the relative position of printhead and cell piece; On the basis of determining relative position, print platform and printhead are done move toward one another, make the distance moving of monocrystaline silicon solar cell sheet and print-head nozzle to 15 μ m left and right; Print-head nozzle is shaped as the rectangle of width 50 μ m, length 5000 μ m; High viscosity nickel in printhead slurry is exerted pressure, the nickel slurry is flowed out in print-head nozzle, and touch the upper surface of monocrystaline silicon solar cell sheet; Print platform and printhead are done the rightabout motion, when its relative movement distance surpasses the 10 μ m that sets, stop high viscosity nickel slurry applied pressure in printhead, the nickel slurry is no longer flowed out in the nozzle of printhead, thereby print the nickel electrode grid line of width 50 μ m, length 5000 μ m on the monocrystaline silicon solar cell sheet; Print platform is done relative parallel with printhead, and its moving direction is along the grid line length direction, and relative movement distance is 5000 μ m; Then make print platform and printhead do move toward one another, the distance moving that makes monocrystaline silicon solar cell sheet and print-head nozzle is during to 15 μ m, high viscosity nickel in printhead slurry is exerted pressure, the nickel slurry is flowed out in print-head nozzle, and touch the upper surface of monocrystaline silicon solar cell sheet; Print platform and printhead are done the rightabout motion, when its relative movement distance surpasses the 10 μ m that sets, stop high viscosity nickel slurry applied pressure in printhead, the nickel slurry is no longer flowed out in the nozzle of printhead, thereby print the nickel electrode grid line of width 50 μ m, length 10000 μ m on the monocrystaline silicon solar cell sheet.Continue to repeat above-mentioned printing action, thereby print width 50 μ m, gate electrode line continuous, that depth-width ratio is large on the monocrystaline silicon solar cell sheet.
Embodiment 3
The method identical with embodiment 1, be placed on the polysilicon solar battery slice that is of a size of 156 on print platform, and by gas absorption, be fixed; Print platform moves to the printhead direction, makes solar battery sheet move to printhead below, and the distance that makes solar battery sheet and print-head nozzle is at 500 μ m; Ccd image sensor on printhead is identified the sign on polysilicon solar battery slice, thereby determines and adjust the relative position of printhead and cell piece; On the basis of determining relative position, print platform and printhead are done move toward one another, make the distance moving of polysilicon solar battery slice and print-head nozzle to 15 μ m left and right; Print-head nozzle is shaped as the rectangle of width 40 μ m, length 3000 μ m, the linear permutation that whole printhead is lined up by numerous nozzles of width interval 10mm, length interval 3000 μ m; High viscosity copper in printhead slurry is exerted pressure, the copper slurry is flowed out in print-head nozzle, and touch the upper surface of polysilicon solar battery slice; Print platform and printhead are done the rightabout motion, when its relative movement distance surpasses the 15 μ m that sets, stop high viscosity copper slurry applied pressure in printhead, the copper slurry is no longer flowed out in the nozzle of printhead, thereby print the array that copper electrode grid lines consistent with print-head nozzle, numerous width 40 μ m length 3000 μ m form on the monocrystaline silicon solar cell sheet; Print platform is done relative parallel with printhead, and its moving direction is along the grid line length direction, and relative movement distance is 3000 μ m; Then make print platform and printhead do move toward one another, make the distance moving of polysilicon solar battery slice and print-head nozzle to 15 μ m left and right; High viscosity copper in printhead slurry is exerted pressure, the copper slurry is flowed out in print-head nozzle, and touch the upper surface of polysilicon solar battery slice; Print platform and printhead are done the rightabout motion, when its relative movement distance surpasses the 15 μ m that sets, stop high viscosity copper slurry applied pressure in printhead, the copper slurry is no longer flowed out in the nozzle of printhead, thereby print the copper electrode grid line of width 40 μ m, length 6000 μ m on polysilicon solar battery slice.Continue to repeat above-mentioned printing action, thereby print width 40 μ m, gate electrode line continuous, that depth-width ratio is large on polysilicon solar battery slice.
Embodiment 4
The method identical with embodiment 1, be placed on the polysilicon solar battery slice that is of a size of 156 on print platform, and by gas absorption, be fixed; Print platform moves to the printhead direction, makes solar battery sheet move to printhead below, and the distance that makes solar battery sheet and print-head nozzle is at 1000 μ m; Ccd image sensor on printhead is identified the sign on polysilicon solar battery slice, thereby determines and adjust the relative position of printhead and cell piece; On the basis of determining relative position, print platform and printhead are done move toward one another, make the distance moving of polysilicon solar battery slice and print-head nozzle to 25 μ m; Print-head nozzle is shaped as the rectangle of width 40 μ m, length 3000 μ m, the linear permutation that whole printhead is lined up by numerous nozzles of width interval 10mm, length interval 3000 μ m; High viscosity in printhead silver slurry is exerted pressure, the silver slurry is flowed out in print-head nozzle, and touch the upper surface of polysilicon solar battery slice; Print platform and printhead are done the rightabout motion, when its relative movement distance surpasses the 20 μ m that sets, stop high viscosity silver slurry applied pressure in printhead, the silver slurry is no longer flowed out in the nozzle of printhead, thereby print the array that silver electrode grid lines consistent with print-head nozzle, numerous width 40 μ m length 3000 μ m form on the monocrystaline silicon solar cell sheet; Print platform is done relative parallel with printhead, and its moving direction is along the grid line length direction, and relative movement distance is 3000 μ m; Then make print platform and printhead do move toward one another, make the distance moving of polysilicon solar battery slice and print-head nozzle to 25 μ m; High viscosity in printhead silver slurry is exerted pressure, the silver slurry is flowed out in print-head nozzle, and touch the upper surface of polysilicon solar battery slice; Print platform and printhead are done the rightabout motion, when its relative movement distance surpasses the 20 μ m that sets, stop high viscosity silver slurry applied pressure in printhead, the silver slurry is no longer flowed out in the nozzle of printhead, thereby print the silver electrode grid line of width 40 μ m, length 6000 μ m on polysilicon solar battery slice.Continue to repeat above-mentioned printing action, thereby print width 40 μ m, gate electrode line continuous, that depth-width ratio is large on polysilicon solar battery slice.
Claims (5)
1. a printing prepares the method for front electrode of solar battery, comprises the following steps:
(1) solar battery sheet is placed on print platform, and by gas absorption, is fixed;
(2) print platform moves to the printhead direction, makes solar battery sheet move to the printhead below;
(3) ccd image sensor on printhead is identified the sign on solar battery sheet, thereby determines and adjust the relative position of printhead and cell piece;
(4) print platform and printhead are done move toward one another, make the distance of solar battery sheet and print-head nozzle between 1-1000 μ m;
(5) the high viscosity electrode slurry in printhead is exerted pressure, electrode slurry is flowed out in print-head nozzle, and touch the upper surface of solar battery sheet;
(6) print platform and printhead are done the rightabout motion, when its relative movement distance is 5-40 μ m, stop high viscosity electrode slurry applied pressure in printhead, electrode slurry is no longer flowed out in the nozzle of printhead, thereby print gate electrode line consistent with the print-head nozzle shape, that discontinuous, depth-width ratio is large on solar battery sheet;
(7) print platform is done relative parallel with printhead;
(8) then repeat the step of (4) to (7), thereby print gate electrode line continuous, that depth-width ratio is large on solar battery sheet.
2. printing according to claim 1 prepares the method for front electrode of solar battery, it is characterized in that: described solar battery sheet is at least a in monocrystalline silicon piece, polysilicon chip, quasi-monocrystalline silicon.
3. printing according to claim 1 prepares the method for front electrode of solar battery, it is characterized in that: described print-head nozzle is shaped as circle, square or rectangular, and whole printhead is the linear array of the consistent nozzle of single-nozzle or numerous shape.
4. printing according to claim 1 prepares the method for front electrode of solar battery, it is characterized in that: at least a in silver slurry, copper slurry, nickel slurry or palladium-Yin slurry of described electrode slurry.
5. printing according to claim 1 prepares the method for front electrode of solar battery, it is characterized in that: the relative movement distance described in step (6) is 15-30 μ m, then stops high viscosity electrode slurry applied pressure in printhead.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100126250A CN102544218B (en) | 2012-01-16 | 2012-01-16 | Method for manufacturing positive electrode of solar cell in printing manner |
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| CN2012100126250A CN102544218B (en) | 2012-01-16 | 2012-01-16 | Method for manufacturing positive electrode of solar cell in printing manner |
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| CN102544218B true CN102544218B (en) | 2013-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110421968A (en) * | 2019-08-09 | 2019-11-08 | 协鑫集成科技股份有限公司 | The printing equipment and electrode preparation system of solar battery electrode slurry |
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| CN104057741A (en) * | 2014-06-20 | 2014-09-24 | 润峰电力有限公司 | Process for introducing steel plate printing onto ordinary production line of solar cells |
| CN110148640A (en) * | 2019-05-30 | 2019-08-20 | 江苏欧达丰新能源科技发展有限公司 | The method of air brushing sintering production photovoltaic cell gate line electrode |
| CN110233181B (en) * | 2019-06-24 | 2021-06-25 | 大连理工大学 | Device for homogenizing and directly writing solar cell electrode |
| CN113571258B (en) * | 2021-08-18 | 2023-08-04 | 苏州诺菲纳米科技有限公司 | Method for replacing HJT photovoltaic low-temperature silver paste with metal composite paste |
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| CN1933189A (en) * | 2005-09-12 | 2007-03-21 | 中芯国际集成电路制造(上海)有限公司 | New method of printing solar cell size |
| CN101728438A (en) * | 2008-10-17 | 2010-06-09 | 大洲电子材料株式会社 | Conductive paste composition, preparation of electrode using same and solar cell comprising same |
| JP2011201055A (en) * | 2010-03-24 | 2011-10-13 | Panasonic Corp | Device and method for printing screen |
| CN102222729A (en) * | 2011-05-31 | 2011-10-19 | 浙江晶科能源有限公司 | Method for improving electroplating quality of front electrode of solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101218133B1 (en) * | 2010-04-27 | 2013-01-18 | 엘지디스플레이 주식회사 | Fabricating method of micro lens and solar cell using the same |
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Patent Citations (4)
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| CN1933189A (en) * | 2005-09-12 | 2007-03-21 | 中芯国际集成电路制造(上海)有限公司 | New method of printing solar cell size |
| CN101728438A (en) * | 2008-10-17 | 2010-06-09 | 大洲电子材料株式会社 | Conductive paste composition, preparation of electrode using same and solar cell comprising same |
| JP2011201055A (en) * | 2010-03-24 | 2011-10-13 | Panasonic Corp | Device and method for printing screen |
| CN102222729A (en) * | 2011-05-31 | 2011-10-19 | 浙江晶科能源有限公司 | Method for improving electroplating quality of front electrode of solar cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110421968A (en) * | 2019-08-09 | 2019-11-08 | 协鑫集成科技股份有限公司 | The printing equipment and electrode preparation system of solar battery electrode slurry |
| CN110421968B (en) * | 2019-08-09 | 2020-12-08 | 协鑫集成科技股份有限公司 | Printing device for solar cell electrode paste and electrode preparation system |
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