CN103545386A - Solar cell electrode shape - Google Patents

Solar cell electrode shape Download PDF

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Publication number
CN103545386A
CN103545386A CN201310502722.2A CN201310502722A CN103545386A CN 103545386 A CN103545386 A CN 103545386A CN 201310502722 A CN201310502722 A CN 201310502722A CN 103545386 A CN103545386 A CN 103545386A
Authority
CN
China
Prior art keywords
grid line
electrode
main grid
width
solar cell
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
CN201310502722.2A
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Chinese (zh)
Inventor
叶权华
郑飞
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.)
Clp Electric (yangzhou) Photovoltaic Co Ltd
Original Assignee
Clp Electric (yangzhou) Photovoltaic 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
Application filed by Clp Electric (yangzhou) Photovoltaic Co Ltd filed Critical Clp Electric (yangzhou) Photovoltaic Co Ltd
Priority to CN201310502722.2A priority Critical patent/CN103545386A/en
Publication of CN103545386A publication Critical patent/CN103545386A/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
    • 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

Abstract

The invention relates to a solar cell electrode shape, and belongs to the technical field of solar photovoltaic cell manufacturing. The solar cell electrode shape is mainly characterized in that the closer auxiliary grid lines are to main grid lines, the larger the width of the auxiliary grid lines is, and therefore the collecting capacity of a free carrier can be improved. The solar cell electrode shape mainly has the advantages that in electrical performance, the series resistance of a solar cell is mainly improved, and cell transformation efficiency is improved; the position of a printing portion becomes narrow, and the effect of saving silver paste is achieved. The same theory can be generalized, the width of the two ends of each main grid line is larger than that of the middle of each main grid line, and therefore the series resistance formed after cells are connected together in series can be improved, and the transformation efficiency of a module is improved. The grid line shape design can be applied to different cell structures, a front electrode cell can be applied to the design of a front electrode, and the method (such as IBC/MWT/HIT) can be used for designing the electrode shape as long as the cells of other electrode structures relate to the conduction of the carrier from the auxiliary grid lines to the main grid lines.

Description

Electrode of solar battery shape
Technical field
The present invention relates to a kind of electrode of solar battery shape, belong to solar-energy photo-voltaic cell manufacturing technology field.
Background technology
Solar cell, after the operations such as making herbs into wool, diffusion and PECVD, has been made PN junction, can, at generation current under illumination, for the electric current producing is derived, need on battery surface, make positive and negative two electrodes.The method of manufacturing electrode is a lot, and silk screen printing is to make at present the most general a kind of production technology of electrode of solar battery.And the technique of most critical is exactly the preparation of front electrode in silk-screen printing technique, front electrode preparation quality quality has a strong impact on battery conversion efficiency.The Main Function of electrode is that secondary grid line is collected free carrier, the charge carrier of collecting on secondary grid line all can flow to main grid line, near the secondary grid of main grid, except collecting the charge carrier of periphery, also play the conduction charge carrier that secondary grid are collected from afar to the effect of main grid, so higher the closer to the electric current of the secondary grid of main grid.Theoretically, electrode strip is wider, and collection electronic capability is stronger, and the main grid line of the printed pattern of traditional electrode and secondary grid line are all generally as broad as long rectangular pattern.Suitable with the electron collection ability of secondary grid away from main grid near the secondary grid of main grid according to theoretical traditional electrode above, cause collecting electronic capability near the secondary grid position of main grid and weaken, reduced battery conversion efficiency.
Summary of the invention
The object of this invention is to provide a kind of electrode of solar battery shape, solve the main grid line of existing electrode and secondary grid line because being all as broad as long rectangular pattern, above shortcomings, improve the capacity gauge of free carrier by the present invention, thereby effectively improve battery conversion efficiency.
The object of the invention is to be achieved through the following technical solutions, a kind of electrode of solar battery shape, perpendicular to the some secondary grid line of each main grid line, is characterized in that in electrode, and the width of secondary grid line that more approaches main grid line is larger.
The narrow hem width degree of secondary grid line is controlled at 10 ~ 30um, and broadside is controlled at 50 ~ 100um.
Width in the middle of main grid line two ends width is slightly larger than.
The present invention is by taking more to approach the larger design of width of the secondary grid line of main grid line, can improve the capacity gauge of free carrier like this, main benefit shows: 1) series resistance of solar cell is mainly improved in electrical property aspect, improves battery conversion efficiency; 2) printing position narrows down, and plays the effect of saving silver slurry.
It is wider that same principle extends to main grid line width that main grid line also the adopts two ends width in the middle of can be, can improve like this series resistance after battery strings is linked togather, and improves the conversion efficiency of module.This grid line shape design can be applicable in different battery structures, front electrode battery may be used in the design of front electrode, as long as other electrode structure battery relates to the conduction of charge carrier from secondary grid line to main grid line, can apply the method (as IBC/MWT/HIT etc.) and designs electrode shape.
Accompanying drawing explanation
Fig. 1 is the shape schematic diagram of main grid line and secondary grid line in electrode of the present invention;
Fig. 2 is one of shape schematic diagram of the secondary grid line of close main grid line in electrode of the present invention;
Fig. 3 is near two of the shape schematic diagram of the secondary grid line of main grid line in electrode of the present invention;
Fig. 4 is near three of the shape schematic diagram of the secondary grid line of main grid line in electrode of the present invention;
In figure, 1 main grid line, 2 secondary grid lines, 3 solar battery sheets.
Embodiment
Further illustrate in conjunction with the accompanying drawings and embodiments the present invention, in the front electrode figure generally using at present, positive gate electrode is distributed in the front of solar battery sheet, positive gate electrode comprises the secondary grid line that the main grid line that is parallel to each other and Duo Gen and main grid line are perpendicular, main grid line has two, wherein two are arranged in both sides, left/right side main grid line from silicon chip edge apart from 26mm, the spacing of main grid line and main grid line is 52mm, main grid line and secondary grid line are all standard rectangular shape, main grid line length 154mm, width 1.5mm; The long 154mm of secondary grid line, width 50um.
As shown in Figure 1, in the present invention, main grid line 1 is constant, and long is 154mm, and width is 1.5mm; Secondary grid line 2 is long is 26mm, and narrow hem width degree is 30um, and broadside width is 70um.Secondary grid line 2 shapes have as follows: as shown in Figure 2, secondary grid line 2 width of close main grid line 1 are with rectangle or trapezoidally increase progressively gradually.As shown in Figure 3, secondary grid line 2 width near main grid line 1 increase progressively gradually with cambered surface or curved surface.As shown in Figure 4, secondary grid line 2 width near main grid line 1 increase progressively gradually with triangle.It is large that the newly-designed secondary grid line 2 shape electrode gross areas do not become, do not affect solar battery front side shading-area, do not increase slurry weight, in the situation that not raising the cost, improve the fill factor, curve factor of solar cell, thereby improve the conversion efficiency of solar cell yet.

Claims (6)

1. an electrode of solar battery shape, comprises main grid line and secondary grid line in electrode, it is characterized in that, the width of secondary grid line that more approaches main grid line is larger.
2. electrode of solar battery shape according to claim 1, is characterized in that, the narrow hem width degree of secondary grid line is controlled at 10 ~ 30um, and broadside is controlled at 50 ~ 100um.
3. electrode of solar battery shape according to claim 1 and 2, is characterized in that, near the secondary grid line width of main grid line with rectangle or trapezoidally increase progressively gradually.
4. electrode of solar battery shape according to claim 1 and 2, is characterized in that, the secondary grid line width of close main grid line increases progressively gradually with cambered surface or curved surface.
5. electrode of solar battery shape according to claim 1 and 2, is characterized in that, the secondary grid line width of close main grid line increases progressively gradually with triangle.
6. electrode of solar battery shape according to claim 1, is characterized in that, the width in the middle of main grid line two ends width is slightly larger than.
CN201310502722.2A 2013-10-24 2013-10-24 Solar cell electrode shape Pending CN103545386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310502722.2A CN103545386A (en) 2013-10-24 2013-10-24 Solar cell electrode shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310502722.2A CN103545386A (en) 2013-10-24 2013-10-24 Solar cell electrode shape

Publications (1)

Publication Number Publication Date
CN103545386A true CN103545386A (en) 2014-01-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310502722.2A Pending CN103545386A (en) 2013-10-24 2013-10-24 Solar cell electrode shape

Country Status (1)

Country Link
CN (1) CN103545386A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108550637A (en) * 2018-06-22 2018-09-18 通威太阳能(安徽)有限公司 A kind of more main grid crystal silicon solar batteries back of the body electric field structures
CN109524484A (en) * 2018-11-26 2019-03-26 西安交通大学 Micro- vibration of highly conductive silver electrode assists high speed impact deposition method
CN110335905A (en) * 2019-08-20 2019-10-15 通威太阳能(安徽)有限公司 A kind of structure and its method improving double-side cell back up
CN110660874A (en) * 2019-09-30 2020-01-07 通威太阳能(合肥)有限公司 Auxiliary grid electrode and solar cell

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108550637A (en) * 2018-06-22 2018-09-18 通威太阳能(安徽)有限公司 A kind of more main grid crystal silicon solar batteries back of the body electric field structures
CN108550637B (en) * 2018-06-22 2023-07-25 通威太阳能(安徽)有限公司 Back electric field structure of multi-main-grid crystalline silicon solar cell
CN109524484A (en) * 2018-11-26 2019-03-26 西安交通大学 Micro- vibration of highly conductive silver electrode assists high speed impact deposition method
CN109524484B (en) * 2018-11-26 2020-05-22 西安交通大学 Micro-vibration assisted high-speed impact deposition method of high-conductivity silver electrode
CN110335905A (en) * 2019-08-20 2019-10-15 通威太阳能(安徽)有限公司 A kind of structure and its method improving double-side cell back up
CN110660874A (en) * 2019-09-30 2020-01-07 通威太阳能(合肥)有限公司 Auxiliary grid electrode and solar cell

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C06 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20140129

WD01 Invention patent application deemed withdrawn after publication