CN201655816U - Solar battery of secondary print electrodes - Google Patents
Solar battery of secondary print electrodes Download PDFInfo
- Publication number
- CN201655816U CN201655816U CN201020166099XU CN201020166099U CN201655816U CN 201655816 U CN201655816 U CN 201655816U CN 201020166099X U CN201020166099X U CN 201020166099XU CN 201020166099 U CN201020166099 U CN 201020166099U CN 201655816 U CN201655816 U CN 201655816U
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- electrode
- silicon chip
- ground floor
- zone
- erosion groove
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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
- Y02E10/547—Monocrystalline silicon PV cells
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Abstract
The utility model relates to a solar battery of secondary print electrodes, which comprises a silicon chip, wherein an etching groove is etched in an electrode grid line region on the surface of the silicon chip, electrode slurry is filled in the etching groove for forming a first layer electrode, a second layer electrode is printed on the outer surface of the first layer electrode, N<++> staged diffusion regions are arranged under the etching groove and at two side edges of the etching groove, and an N<+> shallow diffusion region is arranged in the non-grid line region on the surface of the silicon chip. The utility model has low serial connection resistance, the electrode slurry can not easily spread in the sintering process, the solar battery is provided with a selective emitting electrode, and the conversation efficiency of the solar battery is high.
Description
Technical field
The utility model relates to the crystal silicon solar energy battery field, especially a kind of solar cell that prints electrode for twice.
Background technology
The conventional solar cell of making only prints one-time electrode usually, but the series resistance of this solar cell is higher, influence battery conversion efficiency, also have in solar cell surface and print two sub-electrodes, help reducing the conductive resistance of grid line though adopting prints electrode for twice, reduce the series resistance of battery, but the printing height of this twice formed two-layer electrode that prints electrode is too high, the silver electrode paste at gate electrode line place is extravagant easily in sintering process, has increased the shading area of battery.
The utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of solar cell that prints electrode for twice is provided, the series resistance of battery is lower, can reduce the shading loss, and has a selective emitter, the contact area of electrode and emitter is big, and the conversion efficiency of solar cell is higher.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of solar cell that prints electrode for twice, has silicon chip, silicon chip surface is divided into gate electrode line zone and the non-grid region of electrode, the erosion groove is carved with in described gate electrode line zone, have in the erosion groove and fill the ground floor electrode that electrode slurry forms, ground floor electrode outer surface has the second layer electrode that the back of printing electrode once more forms in silicon chip surface gate electrode line zone.
Further, described erosion groove below and dual-side have the heavy diffusion region of N++, and the non-grid region of electrode has the shallow diffusion region of N+.
Further, described silicon chip surface is divided into the gate electrode line zone of front electrode and the non-grid region of electrode of front electrode, the erosion groove is carved with in the gate electrode line zone of described front electrode, the ground floor electrode that has the front of filling silver electrode paste formation in the erosion groove, the outer surface of positive ground floor electrode have once more the second layer electrode in the front that forms in silicon chip surface gate electrode line zone behind the printed silver electrode.
Further, described silicon chip back of the body surface is divided into the electrode zone of backplate and the non-electrode zone of backplate, the electrode zone of described backplate is carved with the erosion groove, the ground floor electrode that has the back side of filling silver electrode paste formation in the erosion groove, the outer surface of the ground floor electrode at the back side have once more the second layer electrode at the back side that forms in silicon chip back of the body surface electrode zone behind the printed silver electrode.
The beneficial effects of the utility model are: it is ground floor electrode and second layer electrode that silicon chip surface of the present utility model has two-layer electrode, has increased the conductive cross-sectional area of electrode, and the contact area of electrode and emitter is big, has reduced the series resistance of battery.The ground floor electrode forms in the erosion groove, make the apparent height of electrode have only the height of second layer electrode, electrode slurry is difficult for extravagant in sintering process, can reduce the shading loss, and the utlity model has heavy diffusion region of N++ and the shallow diffusion region of N+, form selective emitter, improve the short wave response of battery, so the conversion efficiency of solar cell is higher.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Wherein: 1. ground floor electrode, 2. second layer electrode, the heavy diffusion region of 3.N++, the shallow diffusion region of 4.N+, 6.P type substrate.
Embodiment
A kind of solar cell that prints electrode for twice as shown in Figure 1 has silicon chip, and silicon chip adopts P type substrate 6.The erosion groove is carved with in the gate electrode line zone of silicon chip surface front electrode, fill silver electrode paste in the erosion groove and form ground floor electrode 1, ground floor electrode 1 outer surface is printed with second layer electrode 2, erosion groove below and dual-side have the heavy diffusion region 3 of N++, and the non-grid region of the electrode of silicon chip surface front electrode has the shallow diffusion region 4 of N+.4 tops, the shallow diffusion region of N+ have silicon dioxide film and anti-reflection SiNx film, and P type substrate 6 back ups have backplate and back side aluminium back of the body field.
Silicon chip surface of the present utility model has two-layer front electrode, and the series resistance of battery is lower.Ground floor electrode 1 forms in the erosion groove, make the apparent height of front electrode have only the height of second layer electrode 2, silver electrode paste is difficult for extravagant in sintering process, the utlity model has heavy diffusion region 3 of N++ and the shallow diffusion region 4 of N+, form selective emitter, the conversion efficiency of solar cell is higher.
Claims (4)
1. solar cell that prints electrode for twice, has silicon chip, silicon chip surface is divided into gate electrode line zone and the non-grid region of electrode, it is characterized in that: the erosion groove is carved with in described gate electrode line zone, have in the erosion groove and fill the ground floor electrode (1) that electrode slurry forms, ground floor electrode (1) outer surface has the second layer electrode (2) that the back of printing electrode once more forms in silicon chip surface gate electrode line zone.
2. a kind of solar cell that prints electrode for twice according to claim 1 is characterized in that: described erosion groove below and dual-side have the heavy diffusion region (3) of N++, and the non-grid region of electrode has the shallow diffusion region of N+ (4).
3. a kind of solar cell that prints electrode for twice according to claim 1, it is characterized in that: described silicon chip surface is divided into the gate electrode line zone of front electrode and the non-grid region of electrode of front electrode, the erosion groove is carved with in the gate electrode line zone of described front electrode, the ground floor electrode (1) that has the front of filling silver electrode paste formation in the erosion groove, the outer surface of positive ground floor electrode (1) have once more the second layer electrode (2) in the front that forms in silicon chip surface gate electrode line zone behind the printed silver electrode.
4. a kind of solar cell that prints electrode for twice according to claim 1, it is characterized in that: described silicon chip back of the body surface is divided into the electrode zone of backplate and the non-electrode zone of backplate, the electrode zone of described backplate is carved with the erosion groove, the ground floor electrode (1) that has the back side of filling silver electrode paste formation in the erosion groove, the outer surface of the ground floor electrode (1) at the back side have once more the second layer electrode (2) at the back side that forms in silicon chip back of the body surface electrode zone behind the printed silver electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020166099XU CN201655816U (en) | 2010-04-20 | 2010-04-20 | Solar battery of secondary print electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020166099XU CN201655816U (en) | 2010-04-20 | 2010-04-20 | Solar battery of secondary print electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201655816U true CN201655816U (en) | 2010-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020166099XU Expired - Fee Related CN201655816U (en) | 2010-04-20 | 2010-04-20 | Solar battery of secondary print electrodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201655816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252984A (en) * | 2012-02-17 | 2013-08-21 | 无锡尚德太阳能电力有限公司 | Screen printing equipment |
-
2010
- 2010-04-20 CN CN201020166099XU patent/CN201655816U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252984A (en) * | 2012-02-17 | 2013-08-21 | 无锡尚德太阳能电力有限公司 | Screen printing equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130420 |