CN204189800U - The solar cell of tool emitter and passivating back and module thereof - Google Patents
The solar cell of tool emitter and passivating back and module thereof Download PDFInfo
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- CN204189800U CN204189800U CN201420461017.2U CN201420461017U CN204189800U CN 204189800 U CN204189800 U CN 204189800U CN 201420461017 U CN201420461017 U CN 201420461017U CN 204189800 U CN204189800 U CN 204189800U
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- solar cell
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- silicon substrate
- tool
- emitter
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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
- Y02E10/52—PV systems with concentrators
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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 is the solar cell of a kind of tool emitter and passivating back, and it comprises a silicon substrate, and described silicon substrate has sensitive surface and non-sensitive surface; One dielectric layer, is arranged at the described non-sensitive surface of described silicon substrate, and has multiple perforate; And a patterned metal layer, it is made up of the metal-to-metal adhesive of the described multiple perforate being filled in described dielectric layer, and the contact-making surface of described patterned metal layer and described silicon substrate forms multiple back surface field.
Description
Technical field
The utility model relates to a kind of solar cell and module thereof, relates in particular a kind ofly can improve the tool emitter of carrier collection efficiency and the solar cell (PERC) of passivating back and module thereof.
Background technology
Fig. 1 shows the profile of traditional solar cell.As shown in Figure 1, traditional solar cell 10 mainly comprises front electrode 101, anti-reflecting layer 102, emitter 103, silicon substrate 104, back surface field (BackSurface Field, BSF) 105 and backplate 106.Anti-reflecting layer 102 mainly formed with anti-light reflection material, prevents light from reflecting with the absorption increasing solar cell 10 pairs of sunlights.Silicon substrate 104 is arranged at the below of anti-reflecting layer 102, and forms emitter 103 between silicon substrate 104 and anti-reflecting layer 102, for transform light energy is become electric energy.In addition, the back surface field 105 of below can reduce Carrier recombination speed, finally by front electrode 101 and backplate 106, the electric energy of generation is sent to external device (ED).And the backplate 106 of this kind of traditional solar cell 10, cover the whole cell backside except back side bus electrode (busbar).The shortcoming of traditional solar cell 10 is that Carrier recombination is caused without passivation layer protection in the back side, and easily causes battery warpage and affect module packaging.In addition, the backplate 106 of this kind of traditional solar cell 10 also expends many metal-to-metal adhesives.
Fig. 2 shows solar cell (the Passivated Emitter andRear Cell of traditional tool emitter and passivating back; PERC) profile; as shown in Figure 2; traditional tool emitter and the solar cell 20 of passivating back; comprise: front electrode 201, anti-reflecting layer 202, emitter 203, silicon substrate 204, back surface field 205, backplate 206, backside passivation layer 207 and back-protective layer 208, wherein backside passivation layer 207 adopts silicon dioxide (SiO
2), silicon oxynitride (SiOxNy), aluminium oxide (Al
2o
3) etc. material be formed at the non-sensitive surface of silicon substrate 204, and using silicon nitride as back-protective layer 208.Moreover; by physics or chemical method, passivation layer 207 and back-protective layer 208 form multiple opening overleaf; front electrode 201 and backplate 206 is formed afterwards with methods such as wire marks; then again with methods such as sintering; make backplate 206 by the part of backside passivation layer 207 and multiple opening of back-protective layer 208 and the contact-making surface of silicon substrate 204; common reaction forms local back surface field 205, to make the solar cell 20 of tool emitter and passivating back.
But, the solar cell of tradition tool emitter and passivating back covers the backplate containing aluminium of flood due to the back side, except metal-to-metal adhesive (such as aluminiferous metals glue) use amount height, easily cause solar cell to bend when the thickness of silicon substrate declines, affect the yield of module packaging in last part technology.And flood conducting resinl can make easily to produce hole (Void) during local back electric field sinter process, affects battery efficiency.In addition, the backplate of aluminiferous metals glue can absorb the long wavelength's sunlight do not utilized completely, reduces solar battery efficiency.
Therefore there is the structure of the solar cell of a kind of Demand Design tool emitter and passivating back, the area coverage of the aluminiferous metals glue of backplate can be reduced to reduce its use amount, and avoid long wavelength's sunlight to be absorbed by this backplate.In addition, make long wavelength's sunlight be reflected back solar battery pas secondary opto-electronic conversion by the back reflector (module back of the body substrate) of module further, promote the performance of solar cell.
Utility model content
The purpose of this utility model is proposing electrode solar cell (the Passivated Emitter and Rear Cell of a kind of tool emitter and passivating back, PERC) structure, reduce the use of the metal-to-metal adhesive of backplate, reduce the generation of the hole (void) of local back surface field, reduce chip warpage degree and allow the solar energy luminous energy of long wavelength penetrate not by the region that the metal-to-metal adhesive of backplate covers, avoid being absorbed by metal-to-metal adhesive.
According to above-mentioned object, disclose the solar cell of a kind of tool emitter and passivating back at this, described solar cell comprises silicon substrate, dielectric layer, patterned metal layer and multiple back surface field.Described silicon substrate has a sensitive surface and a non-sensitive surface.Described dielectric layer is arranged at the described non-sensitive surface of described silicon substrate, and has multiple perforate.Described patterned metal layer is made up of the metal-to-metal adhesive of the described multiple perforate being filled in described dielectric layer, and the contact-making surface of described patterned metal layer and described silicon substrate forms multiple back surface field.
Preferably, the described sensitive surface of described silicon substrate has suede structure (textured surface).
Preferably, the total surface area of described patterned metal layer is 5% to 60% of the total surface area of described dielectric layer.
Preferably, described patterned metal layer forms the backplate of described solar cell.
Preferably, described tool emitter and the solar cell of passivating back comprise a module further and carry on the back substrate, described module back of the body substrate is arranged at the below of described dielectric layer and described patterned metal layer, and described module back of the body substrate is the module back of the body substrate of tool height optical reflective characteristics.
Another object of the present utility model is proposing the solar cell module of a kind of tool emitter and passivating back, by module packaging mode of the present utility model to improve the absorption of long wavelength's sunlight, allow the long wavelength's sunlight penetrated from dielectric layer can carry on the back substrate from module and be reflected back the absorption of solar battery pas second time, to increase the conversion efficiency of solar cell of the present utility model.
According to above-mentioned object, disclose the solar cell module of a kind of tool emitter and passivating back at this, described solar cell module comprises silicon substrate, dielectric layer, patterned metal layer and module and carries on the back substrate.Described silicon substrate has a sensitive surface and a non-sensitive surface.Described dielectric layer is arranged at the described non-sensitive surface of described silicon substrate, and has multiple perforate.Described patterned metal layer is made up of the metal-to-metal adhesive of the described multiple perforate being filled in described dielectric layer, and the contact-making surface of described patterned metal layer and described silicon substrate forms multiple back surface field.Described module back of the body substrate is arranged at the below of described dielectric layer and described patterned metal layer, and described module back of the body substrate is the module back of the body substrate of tool height optical reflective characteristics.
Accompanying drawing explanation
Fig. 1 shows a kind of profile of traditional solar cell.
Fig. 2 shows the profile of the solar cell of a kind of traditional emitter and passivating back.
Fig. 3 shows the profile of the tool emitter of the utility model one embodiment and the solar cell of passivating back.
Fig. 4 shows the part sectioned view of the tool emitter of the utility model one embodiment and the solar cell module of passivating back.
Fig. 5 shows the plane graph of the dielectric layer of the utility model embodiment and the first figure aspect of patterned metal layer.
Fig. 6 shows the plane graph of the dielectric layer of the utility model embodiment and the second graph aspect of patterned metal layer.
Embodiment
The explanation of following embodiment is with reference to accompanying drawing, can in order to the specific embodiment implemented in order to illustrate the utility model.The direction term that the utility model is mentioned, such as upper and lower, front, rear, left and right, inside and outside, side etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is in order to illustrate and to understand the utility model, and is not used to limit the utility model.In the drawings, the unit of structural similarity represents with identical label.
Fig. 3 shows the profile of the tool emitter of the utility model embodiment and the solar cell of passivating back.As shown in Figure 3, the solar cell 30 of tool emitter of the present utility model and passivating back mainly comprises silicon substrate 304, back surface field 305, dielectric layer 307 and patterned metal layer 306.At the solar cell (PERC) that the solar cell 30 of this embodiment is tool emitter and passivating back.And silicon substrate 402 can be polycrystalline silicon substrate, class monocrystalline silicon substrate or monocrystalline silicon substrate, do not limit at this.
In the solar cell 30 of emitter and passivating back, silicon substrate 304 comprises sensitive surface 3042 and non-sensitive surface 3044.Sensitive surface 3042 has matte (textured) structure, to catch incident sunlight, can promote sunlight absorption efficiency.Non-sensitive surface 3044 is the opposite of sensitive surface 3042.
Dielectric layer 307 for having the ability of passivation and being arranged at the below of the non-sensitive surface 3044 of silicon substrate 304, and has multiple perforate.Multiple perforate is the hole opening technology by physics or chemical method, the geometric figure of the perforate such as straight line or clathrate is formed on the surface at dielectric layer 307, as forming the position of back surface field 305, then fill conducting metal glue containing aluminium in multiple perforates of dielectric layer 307 to form the geometric patterned metal layer 306 such as straight line or clathrate by the mode of wire mark (Screen Print).It should be noted that the total surface area of the patterned metal layer 306 of the present embodiment is 5% to 60% of the total surface area of dielectric layer 307.Patterned metal layer 306 is for the formation of the backplate of described solar cell, by covering straight line on dielectric layer 307 containing the conducting metal glue of aluminium or cancellate opening area forms back surface field 305 and conductive layer (backplate), and patterned metal layer 306 is overlapping with back side bus electrode (Busbar) (not show) of part, makes electric charge can collect on the bus electrode of the back side.According to the structure of the solar cell of tool emitter of the present utility model and passivating back, because reduce the area coverage of the aluminiferous metals glue of backplate, thus reach the use amount reducing aluminiferous metals glue, and long wavelength's sunlight of minimizing part absorb by backplate.
Another object of the present utility model is the solar cell module providing a kind of tool emitter and passivating back.As shown in Figure 4, the part sectioned view of the tool emitter of the utility model embodiment and the solar cell module of passivating back is illustrated.It should be noted that, the solar cell module 40 of tool emitter and passivating back can have the structure of the solar cell of aforementioned tool emitter of the present utility model and passivating back, mainly comprise silicon substrate 404, back surface field 405, patterned metal layer 406 and dielectric layer 407, not in this to go forth.The solar cell module 40 of tool emitter of the present utility model and passivating back arranges the module with high optical reflective characteristics at dielectric layer 407 with the below of patterned metal layer 406 and carries on the back substrate 409, completes the structure of the solar cell module 40 of tool emitter of the present utility model and passivating back.
Be different from traditional tool emitter and passivating back solar cell, because the metal-to-metal adhesive not being patterned metal level 406 below dielectric layer 407 of the present utility model completely covers, long wavelength's sunlight of the part therefore received from solar cell module 40 front of tool emitter and passivating back can penetrate silicon substrate 404, penetrate the position of non-patterned metal level 406 afterwards again, cause the photoelectric conversion efficiency of solar cell to reduce.Therefore, in this embodiment, by having the module back of the body substrate 409 of high optical reflectivity characteristic, allow the light penetrating dielectric layer 407 and patterned metal layer 406 can carry on the back substrate 409 from module be reflected back solar battery pas and again utilize, to increase the light energy absorption of the solar cell module 40 of tool emitter of the present utility model and passivating back.
Fig. 5 shows the plane graph of the dielectric layer of the solar cell of tool emitter and passivating back and the first figure aspect of patterned layer.As shown in Figure 5, the dielectric layer 507 at solar cell 50 back side being arranged at tool emitter and passivating back forms the geometric opening such as straight line or clathrate in the mode of physics or chemistry on the surface of dielectric layer 507, then make to be filled in opening figure containing the metal-to-metal adhesive of aluminium with the method for screen painting, and the back side bus electrode 510 that the metal-to-metal adhesive being connected to argentiferous is formed.The patterned metal layer 506 formed only accounts for dielectric layer 507 surface portion ratio, and for example, geometric figure of the present utility model only accounts for 5% to 60% of the surperficial all areas of dielectric layer 507.By above-mentioned technique, the patterned metal layer 506 that dielectric layer 507 is formed forms the backplate of solar cell, can help to collect charge carrier, and the geometric figure that the patterned metal layer 506 that the utility model is formed not only is confined to as shown in Figure 5.
The geometric figure of the patterned metal layer that the utility model is formed can as shown in Figure 6, and the geometric figure of the patterned metal layer 606 that the dielectric layer 607 of tool emitter and passivating back solar cell 60 is formed is clathrate.Tool emitter is roughly identical with passivating back solar cell 50 with tool emitter with the structure of passivating back solar cell 60, and difference is that the pattern that the perforate of dielectric layer 607 is formed is different, and the geometric figure of the patterned metal layer 606 therefore formed is different.It can thus be appreciated that, as shown in the patterned metal layer 506 (or patterned metal layer 606) of solar cell of the present utility model, its pattern can be various different geometric figures, it can be any shape, collection charge carrier is reached as long as can complete, and the figure that total surface area is only the total surface area 5% to 60% of dielectric layer can be the geometric figure of patterned layer of the present utility model, does not limit at this.
By above-mentioned tool emitter and the solar cell of passivating back and the design of module thereof, the use of aluminiferous metals glue can be saved, reduce the angularity of wafer, reduce the number of hole (void) and the light enabling to penetrate dielectric layer and patterned metal layer is carried on the back substrate from module and is reflected back solar battery pas and again utilizes, to increase the output of electric current, and then improve the conversion efficiency of solar cell of the present utility model, increase the generation of electric energy.
The above is only preferred implementation of the present utility model; so itself and be not used to limit the utility model; have in the utility model art and usually know the knowledgeable; not departing from spirit and scope of the present utility model; when doing various change and retouching, the scope that therefore the utility model is claimed is when being as the criterion depending on those as defined in claim.
Claims (9)
1. a solar cell for tool emitter and passivating back, is characterized in that, the solar cell of described tool emitter and passivating back comprises:
One silicon substrate, described silicon substrate has sensitive surface and non-sensitive surface;
One dielectric layer, is arranged at the described non-sensitive surface of described silicon substrate, and has multiple perforate; And
One patterned metal layer, it is by the metal-to-metal adhesive institute of the described multiple perforate being filled in described dielectric layer
Form, and the contact-making surface of described patterned metal layer and described silicon substrate forms multiple back surface field.
2. the solar cell of tool emitter as claimed in claim 1 and passivating back, it is characterized in that, the described sensitive surface of described silicon substrate has suede structure.
3. the solar cell of tool emitter as claimed in claim 1 and passivating back, it is characterized in that, the total surface area of described patterned metal layer is 5% to 60% of the total surface area of described dielectric layer.
4. the solar cell of tool emitter as claimed in claim 1 and passivating back, it is characterized in that, described patterned metal layer forms the backplate of described solar cell.
5. the solar cell of tool emitter as claimed in claim 1 and passivating back, it is characterized in that, comprise a module back of the body substrate further, described module back of the body substrate is arranged at the below of described dielectric layer and described patterned metal layer, and described module back of the body substrate is the module back of the body substrate of tool height optical reflective characteristics.
6. a solar cell module for tool emitter and passivating back, is characterized in that, the solar cell module of described tool emitter and passivating back comprises:
One silicon substrate, described silicon substrate has a sensitive surface and a non-sensitive surface;
One dielectric layer, is arranged at the described non-sensitive surface of described silicon substrate, and has multiple perforate;
One patterned metal layer, be made up of, and the contact-making surface of described patterned metal layer and described silicon substrate forms multiple back surface field the metal-to-metal adhesive of the described multiple perforate being filled in described dielectric layer;
And
One module back of the body substrate, described module back of the body substrate is arranged at the below of described dielectric layer and described patterned metal layer, and described module back of the body substrate is the module back of the body substrate of tool height optical reflective characteristics.
7. the solar cell module of tool emitter as claimed in claim 6 and passivating back, it is characterized in that, the described sensitive surface of described silicon substrate has suede structure.
8. the solar cell module of tool emitter as claimed in claim 6 and passivating back, it is characterized in that, the total surface area of described patterned metal layer is 5% to 60% of the total surface area of described dielectric layer.
9. the solar cell module of tool emitter as claimed in claim 6 and passivating back, it is characterized in that, described patterned metal layer forms the backplate of described solar cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420461017.2U CN204189800U (en) | 2014-08-15 | 2014-08-15 | The solar cell of tool emitter and passivating back and module thereof |
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| CN201420461017.2U CN204189800U (en) | 2014-08-15 | 2014-08-15 | The solar cell of tool emitter and passivating back and module thereof |
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| CN204189800U true CN204189800U (en) | 2015-03-04 |
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| CN201420461017.2U Expired - Fee Related CN204189800U (en) | 2014-08-15 | 2014-08-15 | The solar cell of tool emitter and passivating back and module thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847943A (en) * | 2017-03-03 | 2017-06-13 | 广东爱康太阳能科技有限公司 | Punching PERC double-sided solar batteries and its component, system and preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847943A (en) * | 2017-03-03 | 2017-06-13 | 广东爱康太阳能科技有限公司 | Punching PERC double-sided solar batteries and its component, system and preparation method |
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| 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: 20150304 Termination date: 20210815 |