CN103400869A - Solar battery and front-side electrode thereof - Google Patents
Solar battery and front-side electrode thereof Download PDFInfo
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- CN103400869A CN103400869A CN2013102628059A CN201310262805A CN103400869A CN 103400869 A CN103400869 A CN 103400869A CN 2013102628059 A CN2013102628059 A CN 2013102628059A CN 201310262805 A CN201310262805 A CN 201310262805A CN 103400869 A CN103400869 A CN 103400869A
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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
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Abstract
The invention discloses a front-side electrode of a solar battery and a preparation method thereof. The front-side electrode is equipped with grid lines whose cross section is triangular or trapezoid, two bottom angles where the grid lines contact with the battery are respectively between 40 and 90 DEG, and the length of the upper edge of the trapezoid is less than that of the bottom edge of the trapezoid for 30%. According to the invention, the structure of the grid lines of the solar battery is improved, the grid lines are prepared into narrow strips whose cross section is triangular or trapezoid while the grid lines are lower in contact resistance and shading loss. Compared with traditional grid lines, the grid lines in the invention is still high in the shading width, but lights blocked by the grid lines can be reflected by a triangular or trapezoid inclined plane and can be absorbed by the solar battery, thereby reducing the shading loss and braking through the common knowledge that low shading loss and low contact resistance cannot be obtained at the same time. Employment of the grid lines can improve preparation of a 3D ink-jet printing system, operation is simple and convenient, and ultrafine grid lines in 50 micrometer or even finer can be accurately printed.
Description
Technical field
The application relates to area of solar cell, the solar cell that particularly relates to a kind of front electrode of solar battery and adopt this front electrode of solar battery.
Background technology
Grid line on the front electrode of silion cell and other solar cell plays a part collected current, and the photoelectric conversion efficiency of solar cell is played to material impact.The projected area of grid line and resistance are two important parameters that characterize the grid line performance.In order to make solar cell can accept more incident light, the projected area of grid line is as much as possible little; In order to reduce the ohmic loss of battery, the resistance of grid line is low as much as possible.Positive grid line preparation technology mainly contains two classes at present, and the silk-screen printing technique of the silver grating line of high conductivity silver slurry preparation and cutting are electroplated and buried gate technique.Industrial production substantially use be first method.Along with the maturation of crystal silicon solar batteries technology and the decline of crystal silicon cost of material, the front electrode silver slurry in the material cost of solar cell shared proportion also in continuous rising, by several years ago 5% rise to approximately 20%.The material cost pressure of silver paste of solar cells has caused the great attention of domestic most production firms, the domestic material of silver paste of solar cells has become further reduction crystal silicon solar batteries cost, improves a vital task of product competitiveness.Therefore, " solar power generation development in science and technology " the 12 " ad hoc planning " of Department of Science and Technology's issue middle the 2nd task of material direction proposed to break through the technology of preparing of the crucial supplementary materials such as silver slurry.In " photovoltaic industry " the 12 " development plan " of Ministry of Industry and Information's in February, 2012 issue, also list the electric slurry production domesticization in " 12 " development priority.
Traditional silk-screen printing technique prepares silver grating line and mainly has following problem: the first, in printing process, need silicon chip is exerted pressure, and used thickness is that the silicon chip below 100 microns easily causes bad sheet rate to raise; The second, the resolution of silk screen printing is low, to print the depth-width ratio of silver-colored line low.To make present live width drop to below 50 microns very difficult due to the grid line that has silk screen, in order to make the silver slurry, can pass through silk screen, and can not break, the silver slurry must have certain mobility, this makes the outwards trickling of printed silver grating line, and live width is further increased, and depth-width ratio reduces.
Than screen printing technique, inkjet technology has the following advantages: inkjet printing be a kind of contactless printing ink-jet head with silicon chip between directly do not contact, silicon chip is broken, be suitable for printing present thinner frangible silicon wafer.The distance of inkjet head and substrate is adjustable, and is insensitive to silicon wafer thickness, thereby can the less silicon chip of used thickness, is conducive to reduce the silicon chip cost.Can on the solar cell of rough surface, prepare grid line.Inkjet printing can make the cost of manufacture of battery lower, and efficiency is higher: meticulous print resolution, reduced the complexity of process, and can prepare the more grid line of large ratio of height to width, thereby reduce silver-colored consumption, reduce costs, improve the photoelectric conversion efficiency of battery.Inkjet printing also has advantages of that thin grid and thick grid can be different thickness etc. in addition.Therefore with the inkjet printing mode, prepare front grid electricity level significant for the solar energy industry technology upgrading.
Inkjet technology has developed multiple different printing technique since proposing.According to the drop generation type of printing, can be divided into drop jet printing and aerosol printing two class technology.
Drop sprays and to refer to and will marking ink in the mode of drop, be ejected into the method for the treatment of on substrates printed.The drop jet printing can be divided into again on-demand two classes of continous way.Continous way refers to that ink droplet continuously sprays, and at figuratum local ink droplet, prints in substrate, does not have figuratum place will adopt arrangement for deflecting to reclaim ink droplet.On-demand refers to figuratum local ink-jet, does not have the not ink-jet of place of pattern.Business is mainly on-demand with printer at present, and power is divided into piezoelectric type and hot bubble type.
The basic principle of aerosol printing technique is ink mist to be changed into to aerosol carry out spray printing again.This technology has ink atomizer and printing nozzle two parts.Atomizer can adopt pneumatic or ultrasonic two kinds of atomizing types according to the ink that uses, and the aerosol after atomization is sent to nozzle by gas.At the nozzle place, be designed with around gas and the aerosol after atomization can be assembled to injection.With liquid droplet ejection method, compare aerosol following advantage is arranged: the first, processing performance is good: the aerosol printing technique is not easy plug nozzle, is suitable for working long hours, and its automation degree of equipment is high, and controllability is good, favourable commercial application; The second, resolution is high, and because aerocolloidal formation is lower to the viscosity requirement of ink, thereby print resolution can be by adjusting the viscosity of ink, atomizing type, the flow of atomization gas and covering gas and the parameters such as the aperture adjusting of ink nozzle.
Traditional grid line all designs and is approximated to rectangle.In order to obtain, between high conversion efficiency silver and silicon base, larger contact area to be arranged, contact resistance is low, also wants simultaneously shading few, and series resistance is low.Series resistance and the sectional area of grid line are inversely proportional to.When series resistance one timing, flat wide structure has low contact resistance, but shading is large, and narrow high structure, shading is little but contact resistance is large, and foursquare structure is between the two.
Summary of the invention
The application's purpose is the solar cell that a kind of front electrode of solar battery of architecture advances is provided and contains this front electrode, and the preparation method of the front electrode of solar battery of this architecture advances.
To achieve these goals, the technical scheme that adopts of the application is as follows:
The application discloses a kind of front electrode of solar battery, this front electrode is the electrode of the sunlight plane of incidence, on front electrode, be designed with grid line, this grid line is silver grating line or composite conducting grid line, the cross section of grid line is triangular in shape or trapezoidal, and the angle at two base angles that the triangular in shape or trapezoidal grid line in cross section contacts with battery is between the 40-90 degree, and the length of trapezoidal upper base is less than 30% of the length of going to the bottom.
Further, the width on the base that contacts with battery of silver grating line is the 50-300 micron.
The application's solar cell includes but are not limited to monocrystalline silicon, polysilicon, GaAs, and the solar cell of at least two kinds of lamination combinations in monocrystalline silicon, polysilicon and GaAs.
The application's another side discloses the application's the application of front electrode in solar cell, wherein, solar cell includes but are not limited to monocrystalline silicon, polysilicon, GaAs, and the solar cell of at least two kinds of lamination combinations in monocrystalline silicon, polysilicon and GaAs.
The application's one side again discloses a kind of solar cell, and this solar cell has adopted the application's front electrode.And these solar cells include but are not limited to monocrystalline silicon, polysilicon, GaAs equally, and the solar cell of at least two kinds of lamination combinations in monocrystalline silicon, polysilicon and GaAs.
The application's one side more also discloses the preparation method of the application's front electrode of solar battery, specifically discloses the triangular in shape or trapezoidal grid line in its middle section and adopts the preparation of 3D ink-jet print system.
Preferably, the 3D ink-jet print system is the aerosol print system, and the aerosol that the aerosol print system adopts droplet size to be less than or equal to 4 skins liters prints.
Preferably, the aerosol print system comprises atomising device and printing nozzle, between atomising device and printing nozzle, also comprise an airflow screen screening device, the airflow screen screening device is arranged between atomising device and printing nozzle, the airflow screen screening device carries out filtering screening to the aerocolloidal volume that atomising device produces, make the aerosol that droplet size is large be recovered in atomising device, and droplet size is less than or equal to the aerosol of 4 skins liters for printing.
Further, between airflow screen screening device and printing nozzle, also has a droplet counter.Choosing is arranged, and droplet counter is optical counter or electricity counter
Owing to adopting above technical scheme, the application's beneficial effect is:
The application's front electrode of solar battery improves the structure of its grid line, and is concrete, and by the 3D inkjet technology, it is triangle or trapezoidal slice that grid line is made to cross section, makes grid line have larger contact area and low contact resistance.With traditional grid line, compare, although the application's cross section is triangle or trapezoidal grid line, still have larger shading width, the light that is stopped by grid line can be reflected by triangle or trapezoidal inclined-plane, can be absorbed by solar cell equally, reduce on the contrary the shading loss.The improvement of grid line structure in the application's front electrode of solar battery, for solar cell provides a kind of new thinking and method, when having ensured that grid line has lower contact resistance, also reduced the shading loss; Broken traditional general knowledge that the shading loss is little and low contact resistance can not get both.
The accompanying drawing explanation
Fig. 1 is the reflection ray action effect schematic diagram of the silver grating line of the embodiment of the present application intermediate cam tee section;
Fig. 2 is silver grating line schematic cross-section in embodiment of the application;
Fig. 3 is silver grating line schematic cross-section in another embodiment of the application;
Fig. 4 is the reflection ray action effect schematic diagram of the silver grating line of trapezoid cross section in the embodiment of the present application;
Fig. 5 is the silver grating line schematic cross-section in the application's background technology.
Embodiment
In the application's front electrode of solar battery, structure to silver grating line has been carried out creationary improvement, concrete, it is designed to cross section lines triangular in shape, silver grating line bottom surface triangular in shape, cross section is flat, large with the battery contact area, thereby ensured lower contact resistance, can cause equally although it is so its shading large, still, as shown in Figure 1, after light 1 shines on silver grating line 2, therefore the inclined-plane of silver grating line 2 can be by light reflection,, the light that this part is covered can be reflected absorption equally, has reduced on the contrary the shading loss; Thus, under the prerequisite that ensures less shading loss, can further widen base again, increase the contact area of silver grating line and battery, further reduce contact resistance.Be appreciated that except cross section be triangle, can utilize beyond its leg-of-mutton inclined-plane reflection ray; other shape, as long as and have individual inclined-plane can, for the application, also belong to the application's protection range equally for reflection ray; such as; as shown in Figure 4 trapezoidal, contact area is large, contact resistance is little, although the shading width is larger; but; the light that is covered, can be reflected by its inclined-plane equally, then is absorbed.
It should be noted that, the application's ink-jet print system, be on the basis of existing aerosol print system, carry out improved, concrete, between the atomising device of former aerosol printer and printing nozzle, added an airflow screen screening device, the airflow screen screening device has an input port and two delivery outlets, wherein, the output of input port and atomising device is connected, and the first delivery outlet and printing nozzle are connected, the second delivery outlet tieback atomising device.A kind of implementation of this airflow screen screening device is, adopt a steam jet atomizer, the air-flow that steam jet atomizer sprays is vertical with the aerocolloidal airflow direction of atomising device input airflow screen screening device, and droplet size smaller portions aerosol is along with the air-flow that the jet-impingement device sprays enters the first delivery outlet; Direction when another part aerosol keeps its input airflow screen screening device enters the second delivery outlet; Thereby realize aerocolloidal screening.another implementation of airflow screen screening device is, this airflow screen screening device is by electronic emission element, electrostatic accelerator and speed screening washer form, the speed screening washer is comprised of two blocks of parallel live metal plates, it is the aerosol charging that enters the airflow screen screening device that electronic emission element produces charged particles, charged aerosol is after electrostatic accelerator accelerates, when parallel live metal plate, passing, under the attraction of live metal plate, the drop of small volume enters the first delivery outlet from changing the former direction of motion, the drop that volume is larger keeps the former direction of motion to enter the second delivery outlet, thereby realize aerocolloidal screening.
In the application, atomising device adopts pneumatic spray-on process to produce aerosol, or adopts ultrasonic wave to produce aerosol, then by air-flow, is taken out of.
In the application's aerosol print system, aerosol is selected the drop of suitable size through the airflow screen screening device, and the excessive underproof drop of volume returns in atomising device, atomization again.The drop of selecting accelerates through air-flow and collimater is got on the object of undertaking the printing of.Drop through an optical counter, by the statistical magnitude of optical counter, was regulated air velocity and printing nozzle before getting to the object of undertaking the printing of, to control the thickness of printing.
Below by specific embodiment, also by reference to the accompanying drawings the application is described in further detail.Following examples only are further described the application, should not be construed as the restriction to the application.
Embodiment 1
This example adopts the 3D inkjet technology, and on front electrode of solar battery, printing cross section is leg-of-mutton silver grating line, and as shown in Figure 2, the base width of silver grating line is 50 microns to the cross section structure of silver grating line, is isosceles triangle, and drift angle is 55 degree.
During use, the contact area of silver grating line and battery is large, has lower contact resistance; But, as shown in Figure 1, by its light that covers, can be reflected rear absorption, therefore, its shading loss little.
In addition, it is trapezoidal slice that this example also is printed as silver grating line cross section, and as shown in Figure 4, the length of trapezoidal upper base approximates 30% of the length of going to the bottom, and trapezoidal is isosceles trapezoid, and its base angle is 65 degree approximately.The silver grating line of this structure can reflect light equally, reduce the shading loss, and contact resistance is equally very little.
Embodiment 2
This routine front electrode of solar battery is similar to embodiment 1, and its difference only is, as shown in Figure 3, the base width of silver grating line is 300 microns, and at right angles triangle, and drift angle is 40 degree.
Same, in this routine front electrode of solar battery, the contact area of silver grating line and battery is large, has lower contact resistance; But its shading loss is less.
Above content is the further description of the application being done in conjunction with concrete execution mode, can not assert that the application's concrete enforcement is confined to these explanations.For the application person of an ordinary skill in the technical field, under the prerequisite that does not break away from the application's design, can also make some simple deduction or replace, all should be considered as belonging to the application's protection range.
Claims (10)
1. front electrode of solar battery, described front electrode is the electrode of the sunlight plane of incidence, on described front electrode, be designed with grid line, described grid line is silver grating line or composite conducting grid line, it is characterized in that: the cross section of described grid line is triangular in shape or trapezoidal, and the angle at two base angles that described grid line contacts with battery is between the 40-90 degree, and the length of described trapezoidal upper base is less than 30% of the length of going to the bottom.
2. front electrode according to claim 1, it is characterized in that: the width on the base that described silver grating line contacts with battery is the 50-300 micron.
3. front electrode according to claim 1, it is characterized in that: described solar cell includes but are not limited to monocrystalline silicon, polysilicon, GaAs, and the solar cell of at least two kinds of laminations combinations in monocrystalline silicon, polysilicon and GaAs.
4. the application of the described front electrode of according to claim 1-3 any one in solar cell, described solar cell includes but are not limited to monocrystalline silicon, polysilicon, GaAs, and the solar cell of at least two kinds of lamination combinations in monocrystalline silicon, polysilicon and GaAs.
5. solar cell, it is characterized in that: described solar cell has adopted the described front electrode of claim 1-3 any one.
6. solar cell according to claim 5, it is characterized in that: described solar cell includes but are not limited to monocrystalline silicon, polysilicon, GaAs, and the solar cell of at least two kinds of laminations combinations in monocrystalline silicon, polysilicon and GaAs.
7. a method for preparing the described front electrode of solar battery of claim 1-6 any one, is characterized in that: the grid line employing 3D ink-jet print system preparation that described cross section is triangular in shape or trapezoidal.
8. method according to claim 7, it is characterized in that: described 3D ink-jet print system is the aerosol print system, described aerosol print system adopts droplet size to be less than or equal to the aerosol that 4 skins rise and prints.
9. method according to claim 8, it is characterized in that: described aerosol print system comprises atomising device, printing nozzle and air-flow screening plant, described airflow screen screening device is arranged between described atomising device and printing nozzle, described airflow screen screening device carries out filtering screening to the aerocolloidal volume that atomising device produces, make the aerosol that droplet size is large be recovered in atomising device, and droplet size is less than or equal to the aerosol of 4 skins liters for printing.
10. method according to claim 9 is characterized in that: between described airflow screen screening device and printing nozzle, also have a droplet counter, described droplet counter is optical counter or electricity counter.
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| CN2013102628059A CN103400869A (en) | 2013-06-27 | 2013-06-27 | Solar battery and front-side electrode thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824894A (en) * | 2014-03-10 | 2014-05-28 | 余小翠 | Solar battery with reflector |
| CN103855231A (en) * | 2014-03-24 | 2014-06-11 | 阳江市汉能工业有限公司 | Grid line electrode of solar battery and solar panel with same |
| WO2016065941A1 (en) * | 2014-10-31 | 2016-05-06 | Byd Company Limited | Solar cell unit, conductive wire, array, cell module and manufacturing method thereof |
| CN106206814A (en) * | 2014-10-31 | 2016-12-07 | 比亚迪股份有限公司 | Solar battery cell, conductor wire, array, battery component and preparation method thereof |
| CN108110067A (en) * | 2018-01-22 | 2018-06-01 | 南通苏民新能源科技有限公司 | A kind of solar cell assistant grid for increasing opto-electronic conversion benefit and preparation method thereof |
| CN109346548A (en) * | 2018-11-27 | 2019-02-15 | 英利能源（中国）有限公司 | Photovoltaic module welding and photovoltaic module |
| CN109980023A (en) * | 2017-12-27 | 2019-07-05 | 阿特斯阳光电力集团有限公司 | Photovoltaic cell and photovoltaic module |
| CN110518077A (en) * | 2019-08-30 | 2019-11-29 | 苏州阿特斯阳光电力科技有限公司 | A kind of solar battery sheet and photovoltaic module |
| CN110518078A (en) * | 2019-09-27 | 2019-11-29 | 扬州乾照光电有限公司 | A kind of solar cell and preparation method thereof with novel grid line structure |
| CN112531040A (en) * | 2020-11-30 | 2021-03-19 | 浙江鸿禧能源股份有限公司 | Grid line structure of photovoltaic cell and manufacturing method thereof |
| CN113035974A (en) * | 2021-02-26 | 2021-06-25 | 上海日御新材料科技有限公司 | Front electrode and preparation method thereof |
| CN113130672A (en) * | 2021-02-24 | 2021-07-16 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and manufacturing method thereof |
| WO2023232057A1 (en) * | 2022-06-02 | 2023-12-07 | 苏州太阳井新能源有限公司 | Preparation method for grid line, preparation method for cell sheet, and photovoltaic cell |
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| CN102820376A (en) * | 2012-08-16 | 2012-12-12 | 天津三安光电有限公司 | Preparation method of electrode of solar battery chip |
| WO2013030991A1 (en) * | 2011-08-31 | 2013-03-07 | 三洋電機株式会社 | Solar cell and method for manufacturing same |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824894B (en) * | 2014-03-10 | 2017-06-23 | 余小翠 | Solar cell with reflector |
| CN103824894A (en) * | 2014-03-10 | 2014-05-28 | 余小翠 | Solar battery with reflector |
| CN103855231A (en) * | 2014-03-24 | 2014-06-11 | 阳江市汉能工业有限公司 | Grid line electrode of solar battery and solar panel with same |
| WO2016065941A1 (en) * | 2014-10-31 | 2016-05-06 | Byd Company Limited | Solar cell unit, conductive wire, array, cell module and manufacturing method thereof |
| CN106206814A (en) * | 2014-10-31 | 2016-12-07 | 比亚迪股份有限公司 | Solar battery cell, conductor wire, array, battery component and preparation method thereof |
| CN109980023A (en) * | 2017-12-27 | 2019-07-05 | 阿特斯阳光电力集团有限公司 | Photovoltaic cell and photovoltaic module |
| CN108110067A (en) * | 2018-01-22 | 2018-06-01 | 南通苏民新能源科技有限公司 | A kind of solar cell assistant grid for increasing opto-electronic conversion benefit and preparation method thereof |
| CN109346548A (en) * | 2018-11-27 | 2019-02-15 | 英利能源（中国）有限公司 | Photovoltaic module welding and photovoltaic module |
| CN110518077A (en) * | 2019-08-30 | 2019-11-29 | 苏州阿特斯阳光电力科技有限公司 | A kind of solar battery sheet and photovoltaic module |
| CN110518078A (en) * | 2019-09-27 | 2019-11-29 | 扬州乾照光电有限公司 | A kind of solar cell and preparation method thereof with novel grid line structure |
| CN112531040A (en) * | 2020-11-30 | 2021-03-19 | 浙江鸿禧能源股份有限公司 | Grid line structure of photovoltaic cell and manufacturing method thereof |
| CN112531040B (en) * | 2020-11-30 | 2022-09-16 | 浙江鸿禧能源股份有限公司 | Grid line structure of photovoltaic cell and manufacturing method thereof |
| CN113130672A (en) * | 2021-02-24 | 2021-07-16 | 泰州隆基乐叶光伏科技有限公司 | Solar cell and manufacturing method thereof |
| CN113035974A (en) * | 2021-02-26 | 2021-06-25 | 上海日御新材料科技有限公司 | Front electrode and preparation method thereof |
| WO2023232057A1 (en) * | 2022-06-02 | 2023-12-07 | 苏州太阳井新能源有限公司 | Preparation method for grid line, preparation method for cell sheet, and photovoltaic cell |
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Application publication date: 20131120 |