CN201910427U - Solar battery - Google Patents
Solar battery Download PDFInfo
- Publication number
- CN201910427U CN201910427U CN2010206961207U CN201020696120U CN201910427U CN 201910427 U CN201910427 U CN 201910427U CN 2010206961207 U CN2010206961207 U CN 2010206961207U CN 201020696120 U CN201020696120 U CN 201020696120U CN 201910427 U CN201910427 U CN 201910427U
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- China
- Prior art keywords
- solar battery
- back electrode
- aluminium
- edge
- prior
- 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.)
- Expired - Fee Related
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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
Abstract
The utility model relates to a solar battery. The back of the battery is provided with an aluminum back field and a back electrode. The distance (1cm) from the edge of the aluminum back field (2) to the edge of a battery plate (1) in the prior art is changed into 0.5cm-0.8cm. The width (2.5cm) of the back electrode (3) of the aluminum back field (2) in the prior art is changed into 1.2cm-2.2cm. In the prior art, the whole back electrode (3) is changed into 5-10 sections of sectional type back electrodes (4). By adopting the design, the area of the aluminum back field is increased, the open-circuit voltage and the short-circuit current of the solar battery plate are increased, and finally, the photoelectric conversion efficiency of the solar battery plate can be improved. Proved by an experiment, the conversion efficiency of a selective emitter junction solar battery is improved from 0.1percent to 0.2 percent, whereas the power of an assembly of the solar battery can be improved from 1.5W to 2.5W. The value of the solar battery plate is greatly enhanced.
Description
Technical field
The utility model relates to a kind of solar cell.
Background technology
In order to improve the efficient of silicon solar cell, after the p-n junction preparation is finished, be shady face often in silicon chip back, deposition layer of aluminum film, preparation P+ layer is called aluminium back of the body field.The simplest method is to utilize silk screen printing at silicon chip back up layer of aluminum film at present, and then 800～1000 ℃ of heat treatments, makes aluminium film and alloying with silicon and inside diffusion, forms the P+ layer of one deck high alumina doped in concentrations profiled, constitutes aluminium back of the body field.In sintering, aluminium has passivation, and the gettering effect can reduce the compound overleaf probability of minority carrier.Can effectively improve the open circuit voltage and the short circuit current of solar cell.
The area size of the aluminium back of the body directly influences the passivation of solar cell back face, and the gettering area influences the open circuit voltage and the short circuit current of solar battery sheet simultaneously.Prior art generally is the non-aluminium silicon contact position that cell back face aluminium back of the body field edge and battery sheet edge respectively stay 1cm in order to guarantee the insulating properties at PN junction edge.The area of non-aluminium silicon contact position can cause passivation, the waste of gettering area.In addition, the area of back electrode also directly influences the area that aluminium is carried on the back the field.
The utility model content
Technical problem to be solved in the utility model is: a kind of solar cell is provided, increases the area of aluminium back of the body field, improve open circuit voltage and short circuit current.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of solar cell, have aluminium back of the body field and back electrode at the back side of battery, and the distance at aluminium back of the body field edge and battery sheet edge is 0.5～0.8cm.
The width of back electrode is 1.2～2.2cm.
Back electrode is changed into 5～10 sections segmented back electrode by the back electrode of whole piece.
The beneficial effects of the utility model are: increased the area of aluminium back of the body field, improved the open circuit voltage and the short circuit current of solar battery sheet, finally can improve the photoelectric conversion efficiency of solar battery sheet.According to experiment showed, that the selective emitter junction conversion efficiency of solar cell improves 0.1%-0.2%.And its component power can improve 1.5-2.5W.Improved the value of solar battery sheet greatly.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified;
Fig. 1 is the schematic diagram that dwindles the distance at aluminium back of the body field edge and battery sheet edge;
Fig. 2 is the schematic diagram that reduces the width of back electrode in the aluminium back of the body field;
Fig. 3 changes whole piece back electrode in the aluminium back of the body field in the schematic diagram of segmented back electrode;
Among the figure, 1. battery sheet, 2. the aluminium back of the body, 3. back electrode, 4. segmented back electrode.
Embodiment
As shown in Figure 1, with 2 edge of the aluminium back of the body in the prior art and battery sheet 1 edge apart from 1cm, change 0.5-0.8cm into.The area of aluminium back of the body field 2 is increased.
As Fig. 2, back electrode 3 width of aluminium of the prior art being carried on the back field 2 have 2.5cm to change 1.2-2.2cm into.The area of aluminium back of the body field is increased.
As Fig. 3, in prior art, the back electrode 3 of whole piece changes the segmented back electrode 4 of 5-10 segmentation into.Make the area of aluminium back of the body field 2 obtain increasing.These three schemes are combined, and it is little to form back gauge, narrow back electrode, the aluminium back of the body field of segmented back electrode.Make the area maximization of aluminium back of the body field.Thereby improve the open circuit voltage of solar battery sheet, short circuit current.
Claims (3)
1. a solar cell has the aluminium back of the body (2) and back electrode (3) at the back side of battery sheet (1), it is characterized in that: the distance at the described aluminium back of the body (a 2) edge and battery sheet (1) edge is 0.5～0.8cm.
2. solar cell according to claim 1 is characterized in that: the width of described back electrode (3) is 1.2～2.2cm.
3. solar cell according to claim 1 and 2 is characterized in that: described back electrode (3) is 5～10 sections a segmented back electrode (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206961207U CN201910427U (en) | 2010-12-31 | 2010-12-31 | Solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206961207U CN201910427U (en) | 2010-12-31 | 2010-12-31 | Solar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910427U true CN201910427U (en) | 2011-07-27 |
Family
ID=44302627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206961207U Expired - Fee Related CN201910427U (en) | 2010-12-31 | 2010-12-31 | Solar battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201910427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108475706A (en) * | 2016-03-10 | 2018-08-31 | 株式会社钟化 | Solar cell module |
-
2010
- 2010-12-31 CN CN2010206961207U patent/CN201910427U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108475706A (en) * | 2016-03-10 | 2018-08-31 | 株式会社钟化 | Solar cell module |
| CN108475706B (en) * | 2016-03-10 | 2021-11-02 | 株式会社钟化 | Solar cell module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20171231 |