CN105449031A - Electrode surface treatment and manufacturing method - Google Patents
Electrode surface treatment and manufacturing method Download PDFInfo
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- CN105449031A CN105449031A CN201410494215.3A CN201410494215A CN105449031A CN 105449031 A CN105449031 A CN 105449031A CN 201410494215 A CN201410494215 A CN 201410494215A CN 105449031 A CN105449031 A CN 105449031A
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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
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Abstract
The invention provides an electrode surface treatment and manufacturing method, which comprises the steps that a solar cell is provided, a conductive material is coated onto the solar cell, the conductive material is subjected to pre-baking, the conductive material is subjected to hard-pressing, and the conductive material is subjected to hard-baking. Thus, the electrode surface treatment and manufacturing process of the solar cell provided by the invention is completed. By adopting the electrode surface treatment and manufacturing method, the electrode surface manufacturing flow can be improved, and the flatness of electrode surface treatment can be improved.
Description
Technical field
The present invention relates to photoelectric field, particularly relate to one and improve electrode of solar battery surface-treated method and solar cell Making programme.
Background technology
The flow chart of electrode of solar battery as shown in Figure 1, general single, polysilicon solar cell electrode (contactelectrode) wire mark flow process is as described below: first elargol is applied on half tone, elargol smears on solar cell in the mode of wire mark by recycling screen-printing machine uniformly, will form silver electrode on the solar cell after oven cooking cycle.
But, because the half tone used during wire mark is the form adopting braiding, and printing screen plate has pulling force can cause between elargol and printing screen plate after version, thus cause solar cell surface to produce rough rough surface, the cross-section structure of electrode of solar battery as shown in Figure 2 in manufacturing process.
Above-mentioned situation can cause because interface contact area is too small and produce three problems: one, the reduction (tensile test) of silver electrode and subsequent copper aluminium conductive strips engaging process reliability; Two, the rising of solar cell resistivity; Three, the lifting of fragment rate.
Summary of the invention
The object of the invention is to overcome above-described shortcoming, a kind of preparation technology is simple, electrode surface is smooth, resistivity is low, electrodes adhere is firm treatment of electrode surfaces and manufacture method are provided, described manufacture method comprises the following steps: provide a kind of solar cell, electric conducting material is applied on described solar cell, pre-baked described electric conducting material, described electric conducting material is pressed firmly, and described electric conducting material is baked firmly.
The present invention also can comprise following technical characteristic:
Wherein, described hard pressure step is carried out after described pre-baked step.
Described hard roasting step is carried out after described hard pressure step.
Described electric conducting material is elargol.
The temperature of described pre-baked step is between 40 DEG C ~ 100 DEG C.
The temperature of described hard roasting step is higher than 200 DEG C.
The pressure of described hard pressure step is between 10 Kilograms Per Square Meter ~ 1000 Kilograms Per Square Meters.
The present invention is characterised in that, utilize electric conducting material electrode to have plastic feature before without hard baking, after wire mark electrode terminates, carry out the step of pre-baked and hard pressure further, carry out planarizing process to electrode surface, object makes the follow-up electrode of solar battery surface completed more smooth.
Accompanying drawing explanation
Fig. 1 is the flow chart that prior art makes electrode of solar battery.
Fig. 2 is the cross-sectional view that prior art makes electrode in electrode of solar battery process.
Fig. 3 is the method flow diagram that the present invention improves electrode of solar battery surface.
Fig. 4 is standard group electrode of the present invention complexion under an optical microscope.
Fig. 4 A is the complexion that standard group electrode of the present invention amplifies five times under an optical microscope.
Fig. 4 B is that standard group electrode of the present invention amplifies twentyfold complexion under an optical microscope.
Fig. 4 C is the 3 d surface topography figure of standard group electrode of the present invention.
Fig. 5 is that experimental group of the present invention and standard group electrode amplify twentyfold comparison diagram under an optical microscope.
Fig. 6 is the 3 d surface topography comparison diagram of experimental group of the present invention and standard group electrode.
Fig. 7 is the electrode surface difference of height comparison sheet of experimental group of the present invention and standard group electrode.
In figure: A-is without pre-baked, pre-baked 60 DEG C of B-, pre-baked 80 DEG C of C-, pre-baked 100 DEG C of D-, S-standard group, Y-surface difference of height
Embodiment
For the ease of the understanding of those skilled in the art, enumerate the preferred embodiment of the present invention below, and by reference to the accompanying drawings, the effect describing constitution content of the present invention in detail and will reach, the content that execution mode body is mentioned not is limitation of the invention.
For convenience of description, each accompanying drawing of the present invention is only signal to be easier to understand the present invention, and its detailed ratio can adjust according to the demand of design.For the description of relative component upper and lower relation in figure in literary composition; those skilled in the art all will be understood that described upper and lower relation refers to the relative position between object; therefore all equivalences done according to structure, feature and the principle described in patent claim of the present invention change or modify, and are included in the protection range of patent application of the present invention.
The present invention as shown in Figure 3 improves the method flow diagram on electrode of solar battery surface.First, as shown in step S1, provide a kind of solar cell.Described solar cell, through pre-process, comprises cleaning, surface structuration, diffusion process, edge etch, electricity slurry coating anti reflection film etc., and prepares electrode fabrication.Then as shown in step s 2, electric conducting material is applied on half tone, then by wire mark mode, electric conducting material is applied on described solar cell.In general, electric conducting material is make the conventional material of electrode of solar battery, as elargol etc., but is not limited thereto.After electric conducting material is applied on solar cell, as shown in step S3, first carry out pre-baked, it should be noted that pre-baked temperature of the present invention is lower than 100 DEG C, with better between 40 DEG C ~ 100 DEG C, the pre-baked time is 5 minutes, but can adjust according to actual demand.And then carry out step S4, the electric conducting material after pre-baked is pressed firmly, namely applies pressure on this electric conducting material with weight.Executing stressed strength in the present invention is 10 Kilograms Per Square Meter ~ 1000 Kilograms Per Square Meters, in the present embodiment, and each 210 centimetres with floor space size length and width, and weight is the weight of 7 kilograms, applies pressure totally 2 minutes.It is appreciated of course that volume, the weight of above-mentioned weight and execute stressed time length, the present invention is not limited thereto, and can adjust according to actual demand.Above-mentioned steps S3 and S4 is respectively pre-baked step and firmly presses step, and compared with the technology of existing making electrode of solar battery (can with reference to figure 1), the present invention has more had more above-mentioned two steps.Inventor finds after experiment, after electric conducting material is applied to solar cell as elargol etc., if carry out pre-baked step and firmly press step, by more smooth for the electrode surface contributing to post forming, can reach thus and improve the effect such as electrical efficiency, reduction fragment rate.
At pre-baked step S3 and after firmly pressing step S4 to complete, then carry out step S5, firmly step is baked to the electric conducting material on this solar cell, in the present invention, firmly bake with the temperature of more than 200 DEG C, the time is approximately 10 minutes, but be not limited thereto, above-mentioned parameter can adjust according to actual demand.After above-mentioned steps completes, namely the making step of solar cell of the present invention comes to an end, and the follow-up correlated process proceeding other solar cells, as the making etc. of plain conductor.
Inventor finds after experiment, compared with the flow process of existing making solar cell, if after wire mark electrode, increase pre-baked and hard pressure step, can make hard roasting after electrode surface more smooth, the resistance of electrode can be reduced thus and improve the qualification rate of manufacturing process.Be below the experimental result of the present embodiment standard group electrode, with reference to shown in Fig. 4, Fig. 4 is standard group electrode of the present invention complexion under an optical microscope, comprises Fig. 4 A ~ Fig. 4 C, and Fig. 4 A is the complexion that standard group electrode of the present invention amplifies five times under an optical microscope; Fig. 4 B is that standard group electrode of the present invention amplifies twentyfold complexion under an optical microscope; Fig. 4 C is then the 3 d surface topography figure of standard group electrode of the present invention.Applicant is after wire mark electrode, using without pre-baked and without the electrode of hard pressure as standard group, observe, if can find out without pre-baked and hard pressure step through experimental result, electrode surface is easily uneven, and the difference of height average data of electrode is approximately 13 microns (μm) left and right.
Fig. 5 is that experimental group of the present invention and standard group electrode amplify twentyfold comparison under an optical microscope; Fig. 6 is the 3 d surface topography figure comparison of experimental group of the present invention and standard group electrode; Fig. 7 is the electrode surface difference of height comparison sheet of experimental group of the present invention and standard group electrode.With reference to Fig. 5 to Fig. 7, compared with standard group of the present invention, experimental group be respectively without pre-baked but have firmly press A, pre-baked 60 DEG C and have hard pressure group B, pre-baked 80 DEG C and have hard pressure group C, and pre-baked 100 DEG C and have hard pressure group D.Preferably, the above-mentioned pre-baked time of carrying out is all 5 minutes, hard pressure be entirely be then all 210 centimetres with floor space length and width, weight is the weight of 7 kilograms, applies pressure 2 minutes.Observe through experimental result, without pre-baked but have hard pressure group A, and pre-baked 60 DEG C and have hard pressure group B, in the end the difference of height amplitude of three-dimensional surface is less, and namely representative is last, and to form the surface of electrode comparatively smooth.From experimental result, without pre-baked but have hard pressure group A, and pre-baked 60 DEG C and have hard pressure group B, its surperficial difference of height approximately all can be down to 10 microns.Except this, also find by experiment, without pre-baked but have hard pressure group A, the difference of height on its last surface is comparatively unstable, under experimental data, surperficial difference of height is approximately increased to 20 ~ 25 microns sometimes, therefore with without pre-baked but have compared with hard pressure group A, inventor thinks pre-baked 60 DEG C and have and comprise hard pressure group B, is the experimental result that the present invention is better and more stable.Although it should be noted that pre-baked 60 DEG C test out preferably pre-baked temperature for applicant, the present invention is not limited thereto.The pre-baked temperature of the present invention can between 40 DEG C ~ 100 DEG C, compared in the step of existing making electrode of solar battery, not through pre-baked, or pre-baked temperature is higher (in existing electrode of solar battery manufacturing process, if have pre-baked, its temperature great majority are also higher than 100 DEG C), the present invention is after wire mark electrode, carry out pre-baked with the temperature range of 40 DEG C ~ 100 DEG C, and further hard piezoelectricity pole more afterwards, under the experimental result of inventor, the electrode of solar battery surface that susceptible of proof is follow-up to be completed is more smooth compared to the electrode completed made by prior art.
In sum, treatment of electrode surfaces provided by the invention and manufacture method, by after wire mark terminates, increase pre-baked and hard pressure step, make the electrode surface of making more smooth, thus avoid the reduction of electrode and subsequent copper aluminium conductive strips engaging process reliability, it also avoid the rising of solar cell resistivity and the lifting of fragment rate.
The foregoing is only the preferred embodiment of the present invention, therefore all equalizations done according to the present patent application the scope of the claims change and modify, and are included in the protection range of patent application of the present invention.
Claims (7)
1. a treatment of electrode surfaces and manufacture method, it is characterized in that, described manufacture method comprises the following steps: provide a kind of solar cell, electric conducting material is applied on described solar cell, pre-baked described electric conducting material, described electric conducting material is pressed firmly, and described electric conducting material is baked firmly.
2. treatment of electrode surfaces according to claim 1 and manufacture method, is characterized in that, described hard pressure step is carried out after described pre-baked step.
3. treatment of electrode surfaces according to claim 2 and manufacture method, is characterized in that, described hard roasting step is carried out after described hard pressure step.
4. treatment of electrode surfaces according to claim 1 and manufacture method, is characterized in that, described electric conducting material is elargol.
5. treatment of electrode surfaces according to claim 1 and manufacture method, is characterized in that, the temperature of described pre-baked step is between 40 DEG C ~ 100 DEG C.
6. treatment of electrode surfaces according to claim 1 and manufacture method, is characterized in that, the temperature of described hard roasting step is higher than 200 DEG C.
7., according to the arbitrary described treatment of electrode surfaces of claim 1-6 and manufacture method, it is characterized in that, the pressure of described hard pressure step is between 10 Kilograms Per Square Meter ~ 1000 Kilograms Per Square Meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494215.3A CN105449031A (en) | 2014-09-24 | 2014-09-24 | Electrode surface treatment and manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410494215.3A CN105449031A (en) | 2014-09-24 | 2014-09-24 | Electrode surface treatment and manufacturing method |
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| CN105449031A true CN105449031A (en) | 2016-03-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006341547A (en) * | 2005-06-10 | 2006-12-21 | Sharp Corp | Printing mask, screen printing method, manufacturing method for photoelectric transducer, and photoelectric transducer |
| CN102769064A (en) * | 2011-05-05 | 2012-11-07 | 中国科学院微电子研究所 | Method for manufacturing grid line electrode on front surface of solar cell |
| CN102792458A (en) * | 2010-03-24 | 2012-11-21 | 松下电器产业株式会社 | Electrode formation system for solar cell and electrode formation method for solar cell |
| JP5241595B2 (en) * | 2009-04-30 | 2013-07-17 | 三菱電機株式会社 | Method for forming solar cell electrode and method for manufacturing solar cell |
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2014
- 2014-09-24 CN CN201410494215.3A patent/CN105449031A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006341547A (en) * | 2005-06-10 | 2006-12-21 | Sharp Corp | Printing mask, screen printing method, manufacturing method for photoelectric transducer, and photoelectric transducer |
| JP5241595B2 (en) * | 2009-04-30 | 2013-07-17 | 三菱電機株式会社 | Method for forming solar cell electrode and method for manufacturing solar cell |
| CN102792458A (en) * | 2010-03-24 | 2012-11-21 | 松下电器产业株式会社 | Electrode formation system for solar cell and electrode formation method for solar cell |
| CN102769064A (en) * | 2011-05-05 | 2012-11-07 | 中国科学院微电子研究所 | Method for manufacturing grid line electrode on front surface of solar cell |
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Application publication date: 20160330 |