CN104409527A - Solar cell front grid line structure, solar cell and solar cell module - Google Patents

Solar cell front grid line structure, solar cell and solar cell module Download PDF

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Publication number
CN104409527A
CN104409527A CN201410625769.2A CN201410625769A CN104409527A CN 104409527 A CN104409527 A CN 104409527A CN 201410625769 A CN201410625769 A CN 201410625769A CN 104409527 A CN104409527 A CN 104409527A
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CN
China
Prior art keywords
grid
grid lines
line structure
secondary grid
solar battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410625769.2A
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Chinese (zh)
Inventor
王仕鹏
黄海燕
陆川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Chint Solar Energy Technology Co Ltd
Original Assignee
Zhejiang Chint Solar Energy Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201410625769.2A priority Critical patent/CN104409527A/en
Publication of CN104409527A publication Critical patent/CN104409527A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/02Details
    • H01L31/0224Electrodes
    • H01L31/022408Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022433Particular geometry of the grid contacts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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 adapted as photovoltaic [PV] conversion devices
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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 adapted as photovoltaic [PV] conversion devices
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0508Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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 adapted as photovoltaic [PV] conversion devices
    • H01L31/06Semiconductor 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 adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier
    • H01L31/068Semiconductor 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 adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PN homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells
    • H01L31/0682Semiconductor 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 adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PN homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells back-junction, i.e. rearside emitter, solar cells, e.g. interdigitated base-emitter regions back-junction cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/547Monocrystalline silicon PV cells

Abstract

The invention discloses a solar cell front grid line structure. The front grid line structure is structurally composed of at least three main grid lines and auxiliary grid lines which are arranged in a mode that a certain angle is reserved between the main grid lines and the auxiliary grid lines; the auxiliary grid lines between the adjacent main grid lines are of a non-continuous structure in the transverse direction, the auxiliary grid lines between the adjacent main grid lines are divided into left auxiliary grid lines and right auxiliary grid lines by a longitudinal partition; the left auxiliary grid lines and the right auxiliary grid lines are in asymmetrical arrangement in the transverse direction; the left ends of the left auxiliary grid lines are connected with the main grid line at the left side of the left auxiliary grid lines, and the right ends of the left auxiliary grid lines are connected in a segmented mode by short grid lines; the right ends of the right auxiliary grid lines are connected with the main grid line at the right side of the right auxiliary grid lines, and the left ends of the right auxiliary grid lines are connected in a segmented mode by short grid lines. Correspondingly, the invention further provides a solar cell applying the front grid line structure and a solar cell module. Adoption of the front grid line structure can effectively reduce the production cost and improve the photoelectric conversion efficiency of solar cells.

Description

Solar battery front side grid line structure, solar battery sheet and solar module
Technical field
The present invention relates to the grid structure design of the front electrode printing in solar cell, more specifically, the present invention relates to a kind of solar battery front side grid line structure, solar battery sheet and solar module.
Background technology
In current energy starved situation, solar cell, as a kind of renewable resource, attracts wide attention.Greatly developed in recent years, constantly have large-scale solar breeder to set up all over the world.While the high transformation efficiency of pursuit, reduce costs the key point also having become each producer to improve self competitiveness.
Crystal silicon solar energy battery is formed primarily of front electrode, antireflective film, PN junction, backplate four part.Wherein the Main Function of front electrode is the charge carrier derivation by using high conductivity metal to be produced by PN junction, for external circuit.Traditional front electrode is made up of main grid and secondary grid, and both are continuous and crossing, in " H " type structure.The effect of secondary grid is collected currents be delivered to main grid from PN junction.The effect of main grid is carried collecting electric current from secondary grid in a certain direction in assembly and conduct to welding.
The secondary grid of traditional crystal silicon solar energy battery are continuous structure, are namely connected to the secondary grid continuous structure between two main grids.The secondary grid of continuous print are prepared from by conductive silver paste.The secondary grid of conventional crystal silicon solar energy battery are generally filled completely by conductive silver paste, this not only adds huge silver slurry unit consumption cost; And because the secondary grid width between main grid is narrow, length is long, in crystal silicon solar energy battery production process, easily produce disconnected grid, and then impact too can the photoelectric conversion efficiency of battery.
Therefore a kind of problem that can solve large, the secondary grid of crystal silicon solar energy battery silver slurry consumption and easily wreck is needed.
Summary of the invention
Easily wreck to solve large, the secondary grid of crystal silicon solar energy battery silver slurry consumption in prior art, and then the problem that the cell photoelectric conversion efficiency caused reduces, the invention provides a kind of solar battery front side grid line structure, solar battery sheet and solar module.
According to an aspect of the present invention, provide a kind of solar battery front side grid line structure, described front gate line structure forms by least 3 main grids with the secondary grid of the angled setting of described main grid;
Secondary grid between adjacent main grid are discontinuous structure in the horizontal, are divided into left secondary grid and right secondary grid by the secondary grid between longitudinally cutting off adjacent main grid;
Described left secondary grid and described right secondary grid are asymmetric geometry in the horizontal;
The described left left end of secondary grid is connected with the main grid on the left of it, and the right-hand member of described left secondary grid carries out connection segment by short grid line;
The described right right-hand member of secondary grid is connected with the main grid on the right side of it, and the left end of described right secondary grid carries out connection segment by short grid line.
According to a specific embodiment of the present invention, the right-hand member of described short grid line to 3 ~ 5 described left secondary grid connects;
The left end of described short grid line to 3 ~ 5 described right secondary grid connects.
According to another embodiment of the present invention, the number of described main grid is 3 ~ 10.
According to another embodiment of the present invention, the width of described main grid is 0.5mm ~ 2.0mm.
According to another embodiment of the present invention, described main grid is segmentation or continuous structure.
According to another embodiment of the present invention, the number of described secondary grid is 80 ~ 130.
According to another embodiment of the present invention, described main grid is vertical with described secondary grid to be arranged.
According to another embodiment of the present invention, the width of described partition is 0.1mm ~ 2mm.
According to another aspect of the present invention, a kind of solar battery sheet is provided, comprise substrate, be positioned at the PN junction of this substrate front surface, be positioned at the front electrode on this substrate front surface and be positioned at the back electrode of this substrate back surface, it is characterized in that, described front electrode structure adopts the solar battery front side grid line structure as described in claim 1 ~ 7 any one.
According to a further aspect of the invention, provide a kind of solar module, comprise base plate, multiple solar battery sheet as claimed in claim 8 and welding, wherein:
Described multiple solar battery sheet is sequentially arranged on described base plate, and wherein, the front surface of described multiple solar battery sheet is towards same direction;
Described multiple solar battery sheet is connected by described welding.
Solar battery front side grid line structure provided by the invention, the secondary grid between two adjacent main grids are split into left secondary grid and right secondary grid, save the use amount of slurry, reduce production cost; And due to original secondary barrier is broken as two parts, effectively reduce and producing or the risk that fractures of secondary grid in use procedure, improve too can the photoelectric conversion efficiency of battery.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Figure 1 shows that the structural representation of an embodiment according to a kind of solar battery front side grid line structure provided by the invention;
Figure 2 shows that the close-up schematic view of the solar battery front side grid line structure shown in Fig. 1.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.It should be noted that parts illustrated in the accompanying drawings are not necessarily drawn in proportion.Present invention omits the description of known assemblies and treatment technology and process to avoid unnecessarily limiting the present invention.
With reference to figure 1 and Fig. 2, solar battery front side grid line structure provided by the invention forms by least 3 main grids with the secondary grid 3 of the angled setting of described main grid 1.Preferably, described main grid 1 is in 90 ° with described secondary grid 3 is vertical setting.
Wherein, the number of described main grid 1 is 3 ~ 10, such as: 3,6 or 10.The number of described secondary grid is 80 ~ 130, such as: 80,100 or 130.
Optionally, the width of described main grid 1 is 0.5mm ~ 2.0mm, such as: 0.5mm, 1.3mm or 2.0mm.In addition, the structure for main grid 1 is not limit, and namely can select continuous structure, also can adopt segmental structure.Preferred employing segmental structure, as main grid 1, can reduce the use amount of silver slurry like this, reduce costs; But also can shading be reduced, improve the utilance to light.
Secondary grid 3 between adjacent main grid 1 are discontinuous structure in the horizontal, by longitudinally cutting off 2, the secondary grid 3 between adjacent main grid 1 are divided into left secondary grid 31 and right secondary grid 32.The width of described partition 2 is 0.1mm ~ 2.0mm, such as: 0.1mm, 1.0mm or 2.0mm.
Preferably, the width of described partition 2 is identical with the width of described main grid 1.
Described left secondary grid 31 and described right secondary grid 32 are asymmetric geometry in the horizontal.Because left secondary grid 31 and right secondary grid 32 are cut off 2 to separate, therefore to form symmetrical structure, left secondary grid 31 or right secondary grid 32 print abnormal cause disconnected grid time, effectively cannot collect the charge carrier that one's respective area produces, affect cell conversion efficiency, and increase production fraction defective, cause cost to waste.And left secondary grid 31 in the present invention and right secondary grid 32 with the form printing of asymmetric geometry, can greatly reduce the complexity of production technology, reduce production cost; Reduce the disqualification rate of electrode print simultaneously, improve production efficiency and yield.
Can continuous conduction in order to ensure to be cut off the 2 left secondary grid 31 separated and right secondary grid 32, the described left left end of secondary grid 31 is connected with the main grid 1 on the left of it, and the right-hand member of described left secondary grid 31 carries out connection segment by short grid line 41; The described right right-hand member of secondary grid 32 is connected with the main grid 1 on the right side of it, and the left end of described right secondary grid 32 carries out connection segment by short grid line 42.The secondary grid number that short grid line connects is too much, can increase the risk of disconnected grid, reduces battery efficiency; And the secondary grid number that short grid line connects is very few, then can increase process complexity, increase production cost.Therefore preferred, the right-hand member of described short grid line 41 to 3 ~ 5 described left secondary grid 31 connects; The left end of described short grid line 42 to 3 ~ 5 described right secondary grid 32 connects.
According to another aspect of the present invention, additionally provide a kind of solar battery sheet, comprise substrate (being generally foursquare silicon chip), be positioned at the PN junction of this substrate front surface, be positioned at the front electrode on this substrate front surface and be positioned at the back electrode of this substrate back surface.Wherein, described front electrode structure adopts previously described solar battery front side grid line structure, for brevity, no longer repeats the structure of front electrode at this.Described back electrode is positioned on the back surface (i.e. shady face) of solar battery sheet, and the structure the present invention for back electrode does not do particular determination.Preferably, described back electrode adopts the structure identical with front gate line structure.
Owing to have employed the front gate line structure of aforementioned solar battery sheet, therefore solar battery sheet preparation technology provided by the present invention is simple, break due to secondary grid grid and the cell piece fraction defective that causes is low, photoelectric conversion efficiency is high.In addition, owing to have employed the front gate line structure of aforementioned solar battery sheet, therefore solar battery sheet provided by the present invention has the surface structure different from conventional solar cell sheet.Thus, when utilizing solar battery sheet provided by the present invention to form solar components, new possibility can be provided for the circuit design of solar module and surface structure.
According to another aspect of the invention, additionally provide a kind of solar module, comprise base plate, multiple aforesaid solar battery sheet, for brevity, at this to the no longer repeat specification of the structure of this solar battery sheet.The extinction of all solar battery sheets faces up, and namely the front surface of solar cell piece is towards same direction.Adjacent solar battery sheet is connected by welding, namely, one end of welding is welded with the main gate line of one piece of solar battery sheet, and the other end of welding welds with the back electrode of another block solar battery sheet, thus is together in series by all solar battery sheets in solar module.
Compared with traditional solar module, the photoelectric conversion efficiency of solar module provided by the invention is high; There is multiple different circuit design and surface structure.
Although describe in detail about example embodiment and advantage thereof, being to be understood that when not departing from the protection range of spirit of the present invention and claims restriction, various change, substitutions and modifications can being carried out to these embodiments.For other examples, those of ordinary skill in the art should easy understand maintenance scope in while, the order of processing step can change.
In addition, range of application of the present invention is not limited to the technique of the specific embodiment described in specification, mechanism, manufacture, material composition, means, method and step.From disclosure of the present invention, to easily understand as those of ordinary skill in the art, for the technique existed at present or be about to develop, mechanism, manufacture, material composition, means, method or step later, wherein their perform the identical function of the corresponding embodiment cardinal principle that describes with the present invention or obtain the identical result of cardinal principle, can apply according to the present invention to them.Therefore, claims of the present invention are intended to these technique, mechanism, manufacture, material composition, means, method or step to be included in its protection range.

Claims (10)

1. a solar battery front side grid line structure, wherein, described front gate line structure forms by least 3 main grids with the secondary grid of the angled setting of described main grid;
Secondary grid between adjacent main grid are discontinuous structure in the horizontal, are divided into left secondary grid and right secondary grid by the secondary grid between longitudinally cutting off adjacent main grid;
Described left secondary grid and described right secondary grid are asymmetric geometry in the horizontal;
The described left left end of secondary grid is connected with the main grid on the left of it, and the right-hand member of described left secondary grid carries out connection segment by short grid line;
The described right right-hand member of secondary grid is connected with the main grid on the right side of it, and the left end of described right secondary grid carries out connection segment by short grid line.
2. front gate line structure according to claim 1, wherein, the right-hand member of described short grid line to 3 ~ 5 described left secondary grid connects;
The left end of described short grid line to 3 ~ 5 described right secondary grid connects.
3. front gate line structure according to claim 1, wherein, the number of described main grid is 3 ~ 10.
4. front gate line structure according to claim 1, wherein, the width of described main grid is 0.5mm ~ 2.0mm.
5. front gate line structure according to claim 1, wherein, described main grid is segmentation or continuous structure.
6. front gate line structure according to claim 1, wherein, the number of described secondary grid is 80 ~ 130.
7. front gate line structure according to claim 1, wherein, described main grid is vertical with described secondary grid to be arranged.
8. front gate line structure according to claim 1, wherein, the width of described partition is 0.1mm ~ 2mm.
9. a solar battery sheet, comprise substrate, be positioned at the PN junction of this substrate front surface, be positioned at the front electrode on this substrate front surface and be positioned at the back electrode of this substrate back surface, it is characterized in that, described front electrode structure adopts the solar battery front side grid line structure as described in claim 1 ~ 7 any one.
10. a solar module, comprises base plate, multiple solar battery sheet as claimed in claim 8 and welding, wherein:
Described multiple solar battery sheet is sequentially arranged on described base plate, and wherein, the front surface of described multiple solar battery sheet is towards same direction;
Described multiple solar battery sheet is connected by described welding.
CN201410625769.2A 2014-11-06 2014-11-06 Solar cell front grid line structure, solar cell and solar cell module Pending CN104409527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410625769.2A CN104409527A (en) 2014-11-06 2014-11-06 Solar cell front grid line structure, solar cell and solar cell module

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Application Number Priority Date Filing Date Title
CN201410625769.2A CN104409527A (en) 2014-11-06 2014-11-06 Solar cell front grid line structure, solar cell and solar cell module

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107331721A (en) * 2017-06-23 2017-11-07 浙江光隆能源科技股份有限公司 A kind of main grid solar battery sheet of close grid four and its diffusion technique
CN108022992A (en) * 2017-12-29 2018-05-11 苏州阿特斯阳光电力科技有限公司 Cell piece and photovoltaic module

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CN103280465A (en) * 2013-04-23 2013-09-04 合肥晶澳太阳能科技有限公司 Solar photovoltaic assembly capable of effectively improving output efficiency
WO2014069118A1 (en) * 2012-11-01 2014-05-08 信越化学工業株式会社 Solar cell and solar cell module
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CN103872151A (en) * 2012-12-17 2014-06-18 茂迪股份有限公司 Solar cell and module thereof
CN103872152A (en) * 2014-02-27 2014-06-18 宁波日地太阳能电力有限公司 Front grid metal electrode structure of solar battery
CN103943694A (en) * 2013-01-17 2014-07-23 新日光能源科技股份有限公司 Front electrode structure of solar cell
TWI447921B (en) * 2013-05-31 2014-08-01 Neo Solar Power Corp Solar cell

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014069118A1 (en) * 2012-11-01 2014-05-08 信越化学工業株式会社 Solar cell and solar cell module
WO2014083846A1 (en) * 2012-11-30 2014-06-05 三洋電機株式会社 Solar cell
CN103872151A (en) * 2012-12-17 2014-06-18 茂迪股份有限公司 Solar cell and module thereof
CN103137719A (en) * 2012-12-20 2013-06-05 杭州大和热磁电子有限公司 Novel solar energy battery piece
CN103943694A (en) * 2013-01-17 2014-07-23 新日光能源科技股份有限公司 Front electrode structure of solar cell
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107331721A (en) * 2017-06-23 2017-11-07 浙江光隆能源科技股份有限公司 A kind of main grid solar battery sheet of close grid four and its diffusion technique
CN108022992A (en) * 2017-12-29 2018-05-11 苏州阿特斯阳光电力科技有限公司 Cell piece and photovoltaic module

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Application publication date: 20150311