CN104241404A - Solar cell and module thereof - Google Patents
Solar cell and module thereof Download PDFInfo
- Publication number
- CN104241404A CN104241404A CN201310316917.8A CN201310316917A CN104241404A CN 104241404 A CN104241404 A CN 104241404A CN 201310316917 A CN201310316917 A CN 201310316917A CN 104241404 A CN104241404 A CN 104241404A
- Authority
- CN
- China
- Prior art keywords
- conductive part
- solar cell
- electrode
- dielectric layer
- substrate
- 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.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims description 60
- 238000005538 encapsulation Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 abstract description 38
- 239000002002 slurry Substances 0.000 abstract description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 229910000679 solder Inorganic materials 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 10
- 238000002161 passivation Methods 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 230000001737 promoting effect Effects 0.000 description 5
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 4
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 4
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 239000002800 charge carrier Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor 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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
-
- 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
A solar cell and a module thereof, the solar cell comprises: the plasma display panel comprises a substrate, an emitter layer, a first dielectric layer, a positive electrode and a back electrode, wherein the substrate comprises a front surface and a back surface which are opposite to each other, the emitter layer is arranged at the front surface, the first dielectric layer is positioned on the front surface, the positive electrode is positioned on the first dielectric layer and penetrates through the first dielectric layer to contact the emitter layer, and the back electrode is positioned on the back surface. The back electrode comprises a plurality of first conductive parts which are arranged in a two-dimensional array mode, and a plurality of hollow parts are respectively enclosed between the first conductive parts. The invention can save the conductive slurry to reduce the manufacturing cost, and can increase the contact area between the first conductive part and the solder strip lead, thereby being beneficial to improving the welding bonding force and the supporting force between the first conductive part and the solder strip lead and improving the manufacturing yield and the use reliability during welding operation.
Description
Technical field
The present invention relates to a kind of battery and module thereof, particularly relate to a kind of solar cell and module thereof.
Background technology
Consult Fig. 1, Fig. 2, general solar cell comprises usually: emitter layer 94, the passivation layer 95, be configured on a back side 93 of this substrate 91 within a front 92 place that substrate 91, is positioned at this substrate 91 is configured at the front 92 of this substrate 91 and contacts the positive electrode unit 96 of this emitter layer 94 and to be multiplely configured on this passivation layer 95 and to contact the back electrode unit 97 of this substrate 91 through this passivation layer 95.
The front 92 of this substrate 91 is sensitive surface, and this substrate 91 forms PN junction with this emitter layer 94 by manufacture of semiconductor technology, is the source of light volta effect.This positive electrode unit 96 comprises the finger electrode 962 of multiple fronts bus electrode 961 (only showing one in figure) and multiple connection described front bus electrode 961.This back electrode unit 97 comprises and is multiplely configured at back side bus electrode 971 on this passivation layer 95 and one and is configured on this passivation layer 95 and the back electrode 972 contacting this substrate 91 through this passivation layer 95, and this back electrode 972 contacts described back side bus electrode 971.
In manufacture, described front bus electrode 961, described finger electrode 962 are formed by wire mark electrocondution slurry respectively with described back side bus electrode 971, but the material due to electrocondution slurry is mainly silver (Ag) and expensive, add described front bus electrode 961 and be generally all printed to a whole piece continuous print thread like body with described back side bus electrode 971, so the consumption of electrocondution slurry increases manufacturing cost greatly.Therefore, if the area of described front bus electrode 961 or described back side bus electrode 971 can be reduced, to reduce the consumption of electrocondution slurry, manufacturing cost can be reduced.
On the other hand, after solar cell completes, usually multiple solar cell and other Component encapsulating can be become solar cell module.Wherein, must make to be electrically connected to each other by the multiple welding wire (Ribbon) of welding between described solar cell.Specifically, each welding wire connects the front bus electrode 961 of one of them solar cell, and this welding wire also connects the back side bus electrode 971 of another adjacent solar cell.
Although improveing described front bus electrode 961 with the structure of described back side bus electrode 971 is an important problem to save cost, while also need to consider the solder bond pulling force of described welding wire respectively and between described front bus electrode 961 or described back side bus electrode 971.If saving cost, and reduce the consumption of the electrocondution slurry of described front bus electrode 961 and described back side bus electrode 971 simply, the contact area of former electrodes and welding wire will be reduced, then easily there is the problem of welding wire dropping when encapsulation module, and then reduce fine ratio of product and dependability.
Summary of the invention
The object of the present invention is to provide one can save electrocondution slurry to reduce manufacturing cost, and there is solar cell and the module thereof of good fine ratio of product and dependability.
Solar cell of the present invention, comprises: substrate comprising a front respect to one another and a back side, emitter layer being configured at this front place, one be positioned at the first dielectric layer on this front, one to be positioned on this first dielectric layer and to contact positive electrode and the back electrode be positioned on this back side of this emitter layer through this first dielectric layer.This back electrode comprises multiple the first conductive part arranged in two-dimensional array mode, and described first conductive part surrounds out multiple hollow-out parts each other respectively.
Solar cell of the present invention, this solar cell also comprises second dielectric layer between this back side and this back electrode, this second dielectric layer has multiple the first perforate between this substrate and described first conductive part, and this back electrode also comprises and multiplely to lay respectively in described first perforate and can be electrically connected the second conductive part of described first conductive part and this substrate respectively.
Solar cell of the present invention, the material of described second conductive part is identical with the material of described first conductive part.
Solar cell of the present invention, this back electrode also comprises at least one the 3rd conductive part that material is different from described first conductive part and described second conductive part, and this second dielectric layer has multiple the second perforate between this substrate and the 3rd conductive part, the 3rd conductive part extends through described second perforate and can be electrically connected this substrate.
Solar cell of the present invention, the material of described second conductive part is different from the material of described first conductive part.
Solar cell of the present invention, this back electrode also comprises material and is different from described first conductive part but at least one three conductive part identical with the material of described second conductive part, and this second dielectric layer has multiple the second perforate between this substrate and the 3rd conductive part, the 3rd conductive part extends through described second perforate and can be electrically connected this substrate.
Solar cell of the present invention, described first conductive part arranges in the two-dimensional array mode of m × n, and m and n be greater than 1 integer.
Solar cell of the present invention, this solar cell also comprise one between described first conductive part and along a first direction length to extend connecting electrode, this connecting electrode contacts with described first conductive part.
Solar cell of the present invention, described first conductive part is word shape, polygon or star.
Solar cell module of the present invention, comprises: one first sheet material and one second sheet material and an encapsulation material be positioned between this first sheet material and this second sheet material.This solar cell module also comprises at least one solar cell as the aforementioned, and this solar cell is arranged between this first sheet material and this second sheet material, and this encapsulation material contacts this solar cell.
Beneficial effect of the present invention is: this back electrode is separated into the innovation structure design with described first conductive part of two-dimensional array type arrangement, at saving electrocondution slurry with while reducing manufacturing cost, described first conductive part can also be increased when welding and the contact area of welding wire, thus contribute to promoting solder bond power between the two and support force, and welding wire can firmly combine and difficult drop-off when encapsulation module, so fine ratio of product when can promote weld job and dependability.
Accompanying drawing explanation
Fig. 1 is the schematic rear view of general solar cell;
Fig. 2 is the partial perspective cutaway view of the solar cell of Fig. 1, and in figure, a back side of this solar cell upward;
Fig. 3 is the partial schematic sectional view of first preferred embodiment of solar cell module of the present invention;
Fig. 4 is the schematic rear view of a solar cell of this first preferred embodiment;
Fig. 5 is a partial perspective cutaway view of this solar cell, and in figure, a back side of this solar cell upward;
Fig. 6 is the local side view cutaway drawing got along Fig. 4 center line A-A;
Fig. 7 is the schematic rear view of a similar Fig. 4, and another that multiple first perforate of this solar cell and multiple second perforate be described implements aspect;
Fig. 8 is the cutaway view of a similar Fig. 6, and another that multiple first electrode section of this solar cell and multiple second electrode section be described arranges kenel;
Fig. 9 is the local schematic rear view of second preferred embodiment of solar cell of the present invention;
Figure 10 is the local schematic rear view of the 3rd preferred embodiment of solar cell of the present invention;
Figure 11 is the local schematic rear view of the 4th preferred embodiment of solar cell of the present invention;
Figure 12 is the local schematic rear view of the 5th preferred embodiment of solar cell of the present invention;
Figure 13 is the local schematic rear view of the 6th preferred embodiment of solar cell of the present invention;
Figure 14 is the local schematic rear view of the 7th preferred embodiment of solar cell of the present invention;
Figure 15 is the local schematic rear view of the 8th preferred embodiment of solar cell of the present invention;
Figure 16 is the local schematic rear view of the 9th preferred embodiment of solar cell of the present invention;
Figure 17 is the local schematic rear view of the tenth preferred embodiment of solar cell of the present invention;
Figure 18 is the local schematic rear view of the 11 preferred embodiment of solar cell of the present invention;
Figure 19 is the local schematic rear view of the 12 preferred embodiment of solar cell of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail, it should be noted that in the following description content, similar element represents with identical numbering.
Consult Fig. 3, first preferred embodiment of solar cell module of the present invention comprises: between the upper and lower every first sheet material 1 and second sheet material 2, multiple array being arranged in solar cell 3 between this first sheet material 1 with this second sheet material 2 and one between this first sheet material 1 with this second sheet material 2 contacts the encapsulation material 4 of described solar cell 3.Certainly on the implementation, this solar cell module only can comprise a solar cell 3.
In the present embodiment, this first sheet material 1 is also called backboard (Back Sheet), and this second sheet material 2 is positioned at the side of light, and it can be made up of light transmissive material, such as the sheet material such as glass or plastic cement material, does not need special restriction.Described solar cell 3 is electrically connected by multiple welding wire 5 each other.And the material of this encapsulation material 4 be ethylene-vinyl acetate copolymer (EVA) or other can be used for the associated materials of solar cell module packaging, be not limited to the citing of the present embodiment.This first sheet material 1 of this solar cell module is drawn by Fig. 3 upward herein, when being only cooperation drafting subsequent figures, by the back of described solar cell 3 upward to illustrate.Due to the emphasis that the structure non-invention of this solar cell module improves, no longer illustrate, in Fig. 3, be also only simple signal.In addition, because the structure of described solar cell 3 is all identical, be only described for one of them below.Certainly, the structure of the described solar cell 3 in a module is not to be all imperative mutually.
Consult Fig. 4, Fig. 5, Fig. 6, the solar cell 3 of the present embodiment comprises a substrate 31, emitter layer 34, first dielectric layer, 35, positive electrode, 36, back electrode 37 and second dielectric layer 38.Wherein, when being provided with this second dielectric layer 38, the solar cell 3 of this kind of form is exactly the battery types of Passivated Emitter and Rear Contact (being called for short PERC), the back surface electric field (Local Back Surface Field) that the back of this solar cell 3 has many local to arrange, in addition, if when not being provided with this second dielectric layer 38, the whole face, back of this solar cell 3 is all the battery types of back surface electric field design.
This substrate 31 can be the crystal silicon substrate of p-type or N-shaped, and can be monocrystalline silicon substrate or polycrystalline silicon substrate.This substrate 31 comprises front 32 and the back side 33 relative to this front 32 of a light.This emitter layer 34 is configured within this front 32 place, and forms p-n junction with this substrate 31.And this first dielectric layer 35 to be positioned on this front 32 and to contact this emitter layer 34, its material is such as silicon nitride (SiNx) etc., for promoting light amount and reducing charge carrier recombination-rate surface (Surface Recombination Velocity is called for short SRV).Because improvement of the present invention does not lie in this, therefore no longer describe in detail.
This positive electrode 36 is positioned on this first dielectric layer 35, and contacts this emitter layer 34 through this first dielectric layer 35.This positive electrode 36 comprises the finger electrode 362 of at least one bus electrode 361 and this bus electrode 361 of multiple connection.
This back electrode 37 is positioned on this back side 33, and comprise two long to extension and along a spaced electrode group 370 of second direction 82, this first direction 81 can be vertical or non-perpendicular with this second direction 82 each other along first direction 81 respectively.Certainly on the implementation, this back electrode 37 only can comprise an electrode group 370.
Each electrode group 370 all comprises multiple the first conductive part 371 arranged along this first direction 81 and this second direction 82 in two-dimensional array mode respectively, at least two in described first conductive part 371 are connected to each other, and it is around the hollow-out parts 374 closed and/or nothing is closed that described first conductive part 371 can surround out multiple each other respectively, at least one in described hollow-out parts 374 is polygon, and each hollow-out parts 374 in the present invention has an interior surrounding wall 379, increase welding area when being available for high-temperature fusion, thus promote pulling force.Hollow-out parts 374 of the present invention extends in inner concavity towards the back side 33 of this substrate 31 from the end face of described first conductive part 371, and the side of this second dielectric layer 38 in contrast to this back side 33 is exposed in the bottom of described hollow-out parts 374.In addition, the ranks quantitative relation of two-dimensional array of the present invention on this first direction 81 with this second direction 82 is m*n, wherein the quantity of m representative on this first direction 81, and the quantity of n representative in this second direction 82, and m and n be greater than 1 integer.
In the present embodiment, described first conductive part 371 is triangle, and is connect in the mode at diagonal angle, angle between described first conductive part 371, and then surrounds out the triangular in shape and described hollow-out parts 374 of periphery seal.Wherein, the interior surrounding wall 379 of each hollow-out parts 374 can effectively provide more bonding area when welding with described welding wire 5 (see Fig. 3), promotes welding pulling force.Certainly on the implementation, described first conductive part 371 also can be word shape, polygon and/or star, and is not limited to the citing of the present embodiment.
This second dielectric layer 38 is between this back side 33 and this back electrode 37, its material can be the combination of oxide, nitride or above-mentioned material, and can be used for repairing, reducing surface or this substrate 31 internal flaw, and then reduce the recombination-rate surface of charge carrier, promote photoelectric conversion efficiency.This second dielectric layer 38 has multiple the first perforate 381 between this substrate 31 and described first conductive part 371 and is multiplely positioned at this substrate 31 back side and by the second perforate 382 that described first conductive part 371 covers.Described first perforate 381 and at least one in described second perforate 382 are the form of wire perforate or point-like perforate, and certainly, described first perforate 381 also can be polygon or other shapes with described second perforate 382.
This back electrode 37, except having described first conductive part 371, also has multiple second conductive part 375 and at least one the 3rd conductive part 376.In the present embodiment, the material of described second conductive part 375 and the 3rd conductive part 376 is mutually the same, but is different from the material of described first conductive part 371; But in enforcement, described first conductive part 371, described second conductive part 375 also can be identical with the material of the 3rd conductive part 376.Described second conductive part 375 lays respectively at described first perforate 381, and described second conductive part 375 connects described first conductive part 371 and this substrate 31 back side 33 respectively.And corresponding on this back side 33, the area that the 3rd conductive part 376 covers is greater than the area that described first conductive part 371 covers.3rd conductive part 376 connects described first conductive part 371, and the 3rd conductive part 376 extends through described second perforate 382 and can be electrically connected this substrate 31.
In addition, to be positioned within this back side 33 place and to should the 3rd conductive part 376 in the position of described second perforate 382, be provided with multiple local back surface field (Local Back Surface Field, be called for short LBSF) 377, described local back surface field 377 is identical with the conductivity type of this substrate 31, but the doping content of described local back surface field 377 is greater than the doping content of this substrate 31, so can help to promote carrier collection efficiency and photoelectric conversion efficiency, and charge carrier can enter the 3rd conductive part 376 and/or described second conductive part 375 via each local back surface field 377, and outwards derived by described first conductive part 371 of these two electrode groups 370.
In the present embodiment, described first perforate 381 and described second perforate 382 can be the form of point-like perforate, certainly on the implementation, described first perforate 381 and described second perforate 382 also can be illustrated in figure 7 the form of wire perforate, or mix the form of wire and point-like simultaneously, certainly described first perforate 381 also can be polygon with described second perforate 382, does not need restriction at this.Certainly, if when described first perforate 381 and described second perforate 382 are the form of wire perforate as shown in Figure 7, described first perforate 381 can be communicated with described second perforate 382 with extending along this second direction 82 respectively, and then is designed to several along the spaced wire perforate of this first direction 81.
Referring again to Fig. 4, Fig. 5, Fig. 6, what further illustrate is, when the present embodiment makes this back electrode 37, can prior to this second dielectric layer 38 be coated with the electrocondution slurry that one deck main material is aluminium, some of can flowing containing aluminum conductive electric slurry is inserted described first perforate 381 and is contacted this substrate 31 with described second perforate 382, then on this second dielectric layer 38, be coated with the electrocondution slurry that one deck main material is silver again, be wherein that to use the technology of wire mark that silver below is only left a little above-mentioned containing aluminum conductive electric slurry.Aforementioned two kinds of electrocondution slurries solidification is made finally by high temperature sintering (Firing) processing procedure, make to form described second conductive part 375 and the 3rd conductive part 376 respectively containing aluminum conductive electric slurry, and form described first conductive part 371 containing conductive silver slurry, and as shown in Figure 6, described second conductive part 375 lays respectively in described first perforate 381, and respectively the relative two sides of this second conductive part 375 connect the back side 33 of respectively this first conductive part 371 and this substrate 31 respectively.3rd conductive part 376 is covered in the back side 33 this second dielectric layer 38 also extending into respectively and contacts this substrate 31 in described second perforate 382.
Wherein, flowing containing aluminum conductive electric slurry of part inserts described first perforate 381 with described second perforate 382, and the aforementioned aluminum conductive electric slurry that contains contacts part with the back side 33 of this substrate 31, the aluminium of electrocondution slurry can diffuse within this back side 33 place, and then mix with the silicon of this substrate 31 and form the described local back surface field 377 that material is aluminium silicon mixture, and the position of corresponding described second conductive part 375 in the position of described local back surface field 377 and the 3rd conductive part 376 are positioned at the position at described second perforate 382 place.
Consult Fig. 8, certainly on the implementation, also can first on this second dielectric layer 38 localised application one deck main material be the electrocondution slurry of silver, some ofly first can flow and insert in described first perforate 381 containing conductive silver slurry and contact this substrate 31.Then on this second dielectric layer 38, be coated with the electrocondution slurry that one deck main material is aluminium again, and flowing containing aluminum conductive electric slurry of part is inserted in described second perforate 382 and contacts this substrate 31.Aforementioned two kinds of electrocondution slurries solidification is made finally by high temperature sintering processing procedure.Wherein can make to form the 3rd conductive part 376 containing aluminum conductive electric slurry after sintering, and a part for the 3rd conductive part 376 then lays respectively within described second perforate 382 and contacts this substrate 31.And form described first conductive part 371 containing conductive silver slurry, wherein, just be formed with described second conductive part 375 in described first perforate 381 between this back side 33 and described first conductive part 371, now described first conductive part 371 is mutually the same with the material of described second conductive part 375.
In other words, in so-called PERC solar cell, namely the back side 33 of this solar cell 3 is provided with in the kenel of this second dielectric layer 38, because between this back electrode 37 and back side 33 of this substrate 31 separate by this second dielectric layer 38, namely this back electrode 37 is that to contact other parts with substrate 31 back side 33 be then be positioned at above this second dielectric layer 38 in local, makes it in conjunction with pulling force unlike traditional back electrode is not isolated completely and substrate contacts good.Therefore, if on aforementioned PERC solar cell, adopt of the present invention have the first conductive part 371 and the design of hollow-out parts 374 increase overall can bonding area time, can a more traditional whole piece continuously and the back electrode of solid form has the advantage on pulling force, because of the present invention, can guarantee can the increase of bonding area, promotes the pulling force after the welding of described welding wire 5 (see Fig. 3); And review a traditional whole piece back electrode because of its can be obviously less compared to the present invention with the area of welding wire bonds, if make a traditional whole piece continuously and the back electrode of solid form is arranged on this kind of PERC solar cell, will exist in conjunction with the obviously not enough problem of pulling force.
What further illustrate is, on the implementation, this the second dielectric layer 38 place between the electrode group 370 of this back electrode 37 and the back side 33 of this substrate 31 also can not form described first perforate 381, namely the first conductive part 371 of this electrode group 370 is directly configured in the back side 33 this second dielectric layer 38 not contacting this substrate 31, by this second dielectric layer 38 by spaced apart with this substrate 31 for this electrode group 370, so can increase the second dielectric layer 38 below this back electrode 37 to the passivation area at the back side 33 of this substrate 31, contribute to electrical lifting.It can thus be appreciated that whether this back electrode 37 has the design of described first perforate 381, can according to it design and produce respectively for the feature that highlights and its effect had.
Consult Fig. 3, Fig. 4, Fig. 5, from above explanation, back electrode compared to general solar cell is printed to the practice of the continuous thread like body of a whole piece, the electrode group 370 of this back electrode 37 is separated into described first conductive part 371 of two-dimensional array type arrangement by the present invention, the structural design of aforementioned innovation, make the overall non-fully of electrode group 370 of back electrode 37 of the present invention solid, and between described first conductive part 371, surround out described hollow-out parts 374, and then the expending, to reduce production cost of electrocondution slurry of this back electrode 37 can be saved.
Reduce the use amount of electrocondution slurry except can reducing costs, due on the back side 33 that this substrate 31 coated by aforesaid conductive slurry and when carrying out sintering work, if the electrocondution slurry selected can produce the situation of burning to this second dielectric layer 38, then will reduce this second dielectric layer 38 to the area of this back side 33 passivation, and then affect the photoelectric conversion efficiency of this solar cell 3.Therefore, the present embodiment minimizing electrocondution slurry is covered in the area on this second dielectric layer 38, the situation that electrocondution slurry burns this second dielectric layer 38 can be reduced, this second dielectric layer 38 be arranged on the back side 33 of this substrate 31 is made to possess larger area, to provide well passivated effect, and then photoelectric conversion efficiency can be improved.
In addition, caused by screen printing processing and pulp flow characteristic, it is general when wire mark forms the electrode of the continuous wire of a whole piece, structurally have the problem of central thickness relative to the thinner thickness of the left and right sides, when causing welding, welding wire only can contact with the both sides boss of electrode, so make welding wire and electrode contact area between the two not enough and reduce solder bond power.Review, the electrode group 370 of this back electrode 37 is separated into the design of described first conductive part 371 of two-dimensional array type arrangement by the present embodiment, the difference of each first conductive part 371 central thickness and thickness as outside is diminished and comparatively even, simultaneously all the first conductive part 371 thickness is each other also more consistent, thus described welding wire 5 supports pulling force with the bonding area of the first conductive part 371 of described electrode group 370 to provide stronger welding when being increased in follow-up welding, so the central concave configuration that can overcome because of the electrode of the continuous wire of general whole piece causes described welding wire 5 built on stilts and loose contact, hold flaky problem.
Certainly on the implementation, the bus electrode 361 of this positive electrode 36 also can have identical structure with this back electrode 37, and having multiple with the conductive part of two-dimensional array type arrangement, the shape of described conductive part also can be word shape, polygon and/or star, but is not limited to aforementioned citing.Thus, also can save the consumption of electrocondution slurry again, and further reduce the manufacturing cost of this solar cell 3.Meanwhile, described welding wire 5 still can maintain good associativity with the bus electrode 361 of this positive electrode 36 and weld steadiness, thus when encapsulation module described welding wire 5 difficult drop-off.
In sum, this back electrode 37 is separated into the innovation structure design with described first conductive part 371 of two-dimensional array type arrangement, at saving electrocondution slurry with while reducing manufacturing cost, the contact area of described first conductive part 371 and described welding wire 5 can also be increased, thus contribute to promoting solder bond power between the two and support force, and described welding wire 5 can firmly combine and difficult drop-off when encapsulation module, so fine ratio of product when can promote weld job and follow-up module packaging processing procedure and dependability.
Consult Fig. 9, second preferred embodiment of solar cell of the present invention is roughly the same with this first preferred embodiment, and difference is between the two: described first conductive part 371 is corner star.
Consult Figure 10, the 3rd preferred embodiment of solar cell of the present invention is roughly the same with this first preferred embodiment, and difference is between the two: described first conductive part 371 is pentalpha.
Consult Figure 11, the 4th preferred embodiment of solar cell of the present invention is roughly the same with this first preferred embodiment, and difference is between the two: described first conductive part 371 is hexagram.
Consult Figure 12,5th preferred embodiment of solar cell of the present invention is roughly the same with this first preferred embodiment, difference is between the two: described first conductive part 371 is hexagon, and be connect in the mode of edge-to-edge between described first conductive part 371, and then surround out in hexagonal described hollow-out parts 374.Certainly on the implementation, described first conductive part 371 also can the mode at diagonal angle, angle connect.
Consult Figure 13,6th preferred embodiment of solar cell of the present invention is roughly the same with this first preferred embodiment, and difference is between the two: described first conductive part 371 is the shape of English alphabet, specifically, described first conductive part 371 is M shape, but is not limited thereto.
Consult Figure 14,7th preferred embodiment of solar cell of the present invention is roughly the same with this first preferred embodiment, difference is between the two: described first conductive part 371 is X-shaped, first conductive part 371 of each electrode group 370 all arranges along this first direction 81, and be arrange along this second direction 82 interval between the first conductive part 371 of one of them electrode group 370 and the first conductive part 371 of another electrode group 370, and then described first conductive part 371 is arranged in two-dimensional array mode.
And the solar cell 3 of the present embodiment also comprises two respectively along the long connecting electrode 39 to extending of this first direction 81, each connecting electrode 39 penetratingly contacts with described first conductive part 371 of each electrode group 370, below for convenience of description, in figure, this connecting electrode 39 and described first conductive part 371 is distinguished with imaginary line.
The material of these two connecting electrodes 39 is identical with described first conductive part 371, is all made up of the electrocondution slurry of argentiferous.Described first conductive part 371 of the present embodiment connects each other respectively by these two connecting electrodes 39, and respectively with these two connecting electrodes 39 for symmetry axis arrange.Certainly on the implementation, this solar cell 3 only an electrode group 370 can arrange a connecting electrode 39 wherein.
The present embodiment is by setting up this two connecting electrodes 39, the contact area of described welding wire (not shown) when welding can be increased, to promote solder bond power between the two and support force, thus fine ratio of product when promoting weld job further and dependability.
Consult Figure 15,8th preferred embodiment of solar cell of the present invention is roughly the same with the 7th preferred embodiment, difference is between the two: each connecting electrode 39 is between described first conductive part 371 of each electrode group 370, and described first conductive part 371 is D shape, and be connected to the opposition side of one of them connecting electrode 39 with being staggered between two, specifically, each first conductive part 371 has one to the convex convex section 372 of outer arc and a linkage section 373 be connected between this convex section 372 and one of them connecting electrode 39.
Consult Figure 16,9th preferred embodiment of solar cell of the present invention is roughly the same with the 8th preferred embodiment, difference is between the two: described first conductive part 371 is triangle, and described first conductive part 371 of each electrode group 370 is the opposition sides one group being connected to one of them connecting electrode 39 between two, and these two the first conductive parts 371 being positioned at each connecting electrode 39 opposition side are asymmetrical relative to one another.
Consult Figure 17, tenth preferred embodiment of solar cell of the present invention is roughly the same with the 8th preferred embodiment, difference is between the two: described first conductive part 371 of each electrode group 370 is the opposition sides one group being connected to one of them connecting electrode 39 between two, and these two the first conductive parts 371 being positioned at each connecting electrode 39 opposition side are mutually symmetrical.In addition, at least one in described first conductive part 371 has the hollow-out parts 374 of a periphery seal.
What further illustrate is, each first conductive part 371 of the present embodiment all has the hollow-out parts 374 of a periphery seal, previous designs can make the thickness of each the first conductive part 371 become even, thus welding wire (not shown) and the bonding area of described first conductive part 371 when being increased in follow-up welding, thus stronger welding is provided to support pulling force further, and fine ratio of product when promoting weld job and dependability.
Consult Figure 18,11 preferred embodiment of solar cell of the present invention is roughly the same with the tenth preferred embodiment, and difference is between the two: each first conductive part 371 have one sleekly to the convex section 372, that outer arc is convex be connected to linkage section 373 between this convex section 372 and one of them connecting electrode 39 and two by this convex section 372, this linkage section 373 and this connecting electrode 39 around and hollow-out parts 374 in periphery seal.
Consult Figure 19, the 12 preferred embodiment of solar cell of the present invention is roughly the same with the tenth preferred embodiment, and difference is between the two: the convex section 372 angularly bending of each the first conductive part 371.
Connecting electrode set in above-mentioned 7th preferred embodiment to the 12 preferred embodiment of the present invention, can provide embodiments of the invention for reduce electrocondution slurry consumption and increase bonding area object under, this and welding wire is provided to be the corresponding connecting electrode extending parallel pattern further, by aforesaid design, can strengthen further again and promote overall welding effect, guaranteeing overall pulling force.
Claims (10)
1. a solar cell, comprises: substrate comprising a front respect to one another and a back side, emitter layer being configured at this front place, one be positioned at the first dielectric layer on this front, one to be positioned on this first dielectric layer and to contact positive electrode and the back electrode be positioned on this back side of this emitter layer through this first dielectric layer; It is characterized in that: this back electrode comprises multiple the first conductive part arranged in two-dimensional array mode, and described first conductive part surrounds out multiple hollow-out parts each other respectively.
2. solar cell as claimed in claim 1, it is characterized in that: this solar cell also comprises second dielectric layer between this back side and this back electrode, this second dielectric layer has multiple the first perforate between this substrate and described first conductive part, and this back electrode also comprises and multiplely to lay respectively in described first perforate and can be electrically connected the second conductive part of described first conductive part and this substrate respectively.
3. solar cell as claimed in claim 2, is characterized in that: the material of described second conductive part is identical with the material of described first conductive part.
4. solar cell as claimed in claim 3, it is characterized in that: this back electrode also comprises at least one the 3rd conductive part that material is different from described first conductive part and described second conductive part, and this second dielectric layer has multiple the second perforate between this substrate and the 3rd conductive part, the 3rd conductive part extends through described second perforate and can be electrically connected this substrate.
5. solar cell as claimed in claim 2, is characterized in that: the material of described second conductive part is different from the material of described first conductive part.
6. solar cell as claimed in claim 5, it is characterized in that: this back electrode also comprises material and is different from described first conductive part but at least one three conductive part identical with the material of described second conductive part, and this second dielectric layer has multiple the second perforate between this substrate and the 3rd conductive part, the 3rd conductive part extends through described second perforate and can be electrically connected this substrate.
7. solar cell as claimed in claim 1, is characterized in that: described first conductive part arranges in the two-dimensional array mode of m × n, and m and n be greater than 1 integer.
8. solar cell as claimed in claim 1, is characterized in that: this solar cell also comprises one between described first conductive part and along a first direction length to the connecting electrode extended, this connecting electrode contacts with described first conductive part.
9. the solar cell as described in claim arbitrary in claim 1 to 8, is characterized in that: described first conductive part is word shape, polygon or star.
10. a solar cell module, comprises: one first sheet material and one second sheet material and an encapsulation material be positioned between this first sheet material and this second sheet material; It is characterized in that: this solar cell module also comprises at least one solar cell as described in claim arbitrary in claim 1 to 8, and this solar cell is arranged between this first sheet material and this second sheet material, and this encapsulation material contacts this solar cell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102119946 | 2013-06-05 | ||
| TW102119946A TWI492402B (en) | 2013-06-05 | 2013-06-05 | Solar cell and module comprising the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104241404A true CN104241404A (en) | 2014-12-24 |
| CN104241404B CN104241404B (en) | 2016-12-28 |
Family
ID=52229153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310316917.8A Expired - Fee Related CN104241404B (en) | 2013-06-05 | 2013-07-25 | Solar cell and module thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104241404B (en) |
| TW (1) | TWI492402B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10644181B2 (en) | 2017-08-11 | 2020-05-05 | Industrial Technology Research Institute | Photovoltaic module |
| CN112352320A (en) * | 2018-06-26 | 2021-02-09 | 亚特比目有限会社 | Solar cell and method for manufacturing solar cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI626755B (en) * | 2016-06-20 | 2018-06-11 | 茂迪股份有限公司 | Single-sided solar cell, method for manufacturing the same and solar cell module |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609848A (en) * | 2009-07-13 | 2009-12-23 | 江苏林洋新能源有限公司 | The positive backplate and the manufacture method thereof of screen printing crystalline silicon solar cell |
| CN102180043A (en) * | 2010-12-02 | 2011-09-14 | 江阴浚鑫科技有限公司 | Method for printing pattern on solar battery sheet |
| CN102612754A (en) * | 2009-11-18 | 2012-07-25 | 国际商业机器公司 | Holey electrode grids for photovoltaic cells with subwavelength and superwavelength feature sizes |
| CN102760778A (en) * | 2011-04-29 | 2012-10-31 | 无锡尚德太阳能电力有限公司 | Solar battery, solar battery module and manufacturing method of solar battery and solar battery module |
| CN202549856U (en) * | 2012-04-10 | 2012-11-21 | 山东力诺太阳能电力股份有限公司 | Back electrode structure of crystalline silicon cell |
| TW201308637A (en) * | 2011-06-14 | 2013-02-16 | Stichting Energie | Photo-voltaic cell |
| CN103000709A (en) * | 2012-11-26 | 2013-03-27 | 北京大学深圳研究生院 | Back electrode, back electrode absorbing layer composite structure and solar cell |
| TWM451666U (en) * | 2012-08-28 | 2013-04-21 | Topcell Solar Internat Co Ltd | Solar cell |
| CN103094414A (en) * | 2013-01-10 | 2013-05-08 | 浙江正泰太阳能科技有限公司 | Preparation method of back surface field of back-passivated solar cell and back-passivated solar cell provided with back surface field |
| CN202948941U (en) * | 2012-11-06 | 2013-05-22 | 茂迪股份有限公司 | solar cell and module thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7393699B2 (en) * | 2006-06-12 | 2008-07-01 | Tran Bao Q | NANO-electronics |
| TW201310671A (en) * | 2011-08-31 | 2013-03-01 | Tsec Corp | Structure of photovoltaic cell |
| TWM434186U (en) * | 2012-03-06 | 2012-07-21 | Univ Nat Quemoy | Light-concentrating type solar energy receiver |
-
2013
- 2013-06-05 TW TW102119946A patent/TWI492402B/en not_active IP Right Cessation
- 2013-07-25 CN CN201310316917.8A patent/CN104241404B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609848A (en) * | 2009-07-13 | 2009-12-23 | 江苏林洋新能源有限公司 | The positive backplate and the manufacture method thereof of screen printing crystalline silicon solar cell |
| CN102612754A (en) * | 2009-11-18 | 2012-07-25 | 国际商业机器公司 | Holey electrode grids for photovoltaic cells with subwavelength and superwavelength feature sizes |
| CN102180043A (en) * | 2010-12-02 | 2011-09-14 | 江阴浚鑫科技有限公司 | Method for printing pattern on solar battery sheet |
| CN102760778A (en) * | 2011-04-29 | 2012-10-31 | 无锡尚德太阳能电力有限公司 | Solar battery, solar battery module and manufacturing method of solar battery and solar battery module |
| TW201308637A (en) * | 2011-06-14 | 2013-02-16 | Stichting Energie | Photo-voltaic cell |
| CN202549856U (en) * | 2012-04-10 | 2012-11-21 | 山东力诺太阳能电力股份有限公司 | Back electrode structure of crystalline silicon cell |
| TWM451666U (en) * | 2012-08-28 | 2013-04-21 | Topcell Solar Internat Co Ltd | Solar cell |
| CN202948941U (en) * | 2012-11-06 | 2013-05-22 | 茂迪股份有限公司 | solar cell and module thereof |
| CN103000709A (en) * | 2012-11-26 | 2013-03-27 | 北京大学深圳研究生院 | Back electrode, back electrode absorbing layer composite structure and solar cell |
| CN103094414A (en) * | 2013-01-10 | 2013-05-08 | 浙江正泰太阳能科技有限公司 | Preparation method of back surface field of back-passivated solar cell and back-passivated solar cell provided with back surface field |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10644181B2 (en) | 2017-08-11 | 2020-05-05 | Industrial Technology Research Institute | Photovoltaic module |
| CN112352320A (en) * | 2018-06-26 | 2021-02-09 | 亚特比目有限会社 | Solar cell and method for manufacturing solar cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104241404B (en) | 2016-12-28 |
| TW201448238A (en) | 2014-12-16 |
| TWI492402B (en) | 2015-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI495124B (en) | Solar battery and solar battery module | |
| JP5874011B2 (en) | Solar cell and solar cell module | |
| EP2978025B1 (en) | Solar cell and solar cell module containing the same | |
| CN104241404A (en) | Solar cell and module thereof | |
| CN202948941U (en) | solar cell and module thereof | |
| WO2014187111A1 (en) | Front gate line of solar battery piece, and solar battery piece | |
| TWI505484B (en) | Solar cell and module comprising the same | |
| CN103985769A (en) | solar cell and module thereof | |
| TWI483411B (en) | Solar cell and module comprising the same | |
| KR20190020510A (en) | Solar cell panel | |
| TWI556455B (en) | Solar cell, module comprising the same and method of manufacturing the same | |
| CN103872150B (en) | Solaode and module thereof | |
| TW201431096A (en) | Solar cell, module comprising the same and method of manufacturing the same | |
| TWI481048B (en) | Solar cell and module comprising the same | |
| JP5906422B2 (en) | Solar cell and solar cell module | |
| EP4002492A1 (en) | Back-contact solar cell and solar cell module including same | |
| TWI478364B (en) | Solar cell and module comprising the same | |
| TWI527251B (en) | Solar cell and module comprising the same | |
| JP2014116451A (en) | Solar cell and manufacturing method therefor | |
| TWI509818B (en) | Solar cell, method of manufacturing the same and module comprising the same | |
| JP2013093610A (en) | Solar cell structure and solar cell module | |
| CN109585579A (en) | Solar battery and its manufacturing method and solar cell module | |
| TW201929243A (en) | Solar cell | |
| TWM559513U (en) | Solar cell | |
| TW201419557A (en) | Solar cell and module comprising the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20161228 Termination date: 20190725 |