CN109585579A - Solar battery and its manufacturing method and solar cell module - Google Patents
Solar battery and its manufacturing method and solar cell module Download PDFInfo
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- CN109585579A CN109585579A CN201711159534.9A CN201711159534A CN109585579A CN 109585579 A CN109585579 A CN 109585579A CN 201711159534 A CN201711159534 A CN 201711159534A CN 109585579 A CN109585579 A CN 109585579A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 238000002161 passivation Methods 0.000 claims abstract description 14
- 239000007772 electrode material Substances 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 6
- 238000007788 roughening Methods 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 74
- 238000003466 welding Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000011521 glass Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide 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
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
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- 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
-
- 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
- H01L31/0236—Special surface textures
-
- 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
- H01L31/04—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 adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- 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
- H01L31/04—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 adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
A kind of solar battery and its manufacturing method and solar cell module.This solar battery includes substrate, emitter layer, passivation layer, at least a bus electrode, multiple finger electrodes and rear electrode.Emitter layer is located at the front of substrate.Passivation layer is configured on emitter layer.Bus electrode is configured at the front of substrate.Finger electrode is configured at the positive place of substrate and connect respectively with bus electrode, wherein each finger electrode includes that coarse top surface and two inclined sides connect with coarse top surface respectively, coarse top surface includes several strip structures, strip structure is configured along the width direction interval of the finger electrode at place, and each strip structure extends along the length direction of the finger electrode at place.Rear electrode is configured at the back side of substrate.The light of directive finger electrode can be effectively totally reflected in solar battery by strip structure, therefore can promote the absorptivity of solar battery, and then can increase the wattage output of solar cell module.
Description
Technical field
The invention relates to a kind of photoelectric conversion devices, and in particular to a kind of solar battery and its manufacturer
Method and solar cell module.
Background technique
In order to promote the price advantage of solar cell module product, the product demand for meeting client and cooperation government's political affairs
Plan, solar cell module manufacturer are there's no one who doesn't or isn't dedicated to developing high performance solar batteries module product.High efficiency p-type solar energy at present
Battery module innately has cell package to lose (cell to module loss) higher disadvantage at module, leads to p-type solar energy
The actual generation power of battery module is far below the initial designs of battery.Therefore, increase the wattage output of solar cell module
And it reduces cell package and has become the important topic for developing high performance solar batteries module at module loss.
Efficiency in addition to improving solar battery, and using the upper plate of high-penetration rate, lower plate and encapsulating material outside, at present
It proposes to make micro-structure on conductive welding and form light and capture conductive welding (light capturing ribbon, LCR)
Technology and conductive welding attach light-redirecting film (light redirecting film, LRF) technology.Both
Micro-structure or the micro-structure that is attached to conductive welding on of the light capturing technology using conductive welding itself, by directive conduction welding
Light source is effectively totally reflected on solar battery, promotes the absorptivity of solar battery whereby, and then promote solar battery
The wattage output of module.
However, the material cost of both conductive weldings is high, and cooperate the use of both conductive weldings that need to newly buy more string
Welding machine, leads to that the production cost increases.In addition, light captures the electroplating surface silver of conductive welding, therefore need first in solar battery
The conducting resinl of low temperature is coated on bus electrode, light captures conductive welding and could connect with bus electrode, so also results in processing procedure
The increase of cost.In addition, light-redirecting film is attached at the stress increase that will lead to entire conductive welding structure on conductive welding,
After thermal cycle (thermal cycle), solar cell module is easy to produce the problems such as finger electrode (finger) breaks.
Summary of the invention
Therefore, a purpose of the invention is exactly to provide a kind of solar battery and its manufacturing method and solar battery
Module, wherein the finger electrode of solar battery includes coarse top surface, and coarse top surface includes several strip structures.Finger electrode
Strip structure the light of directive finger electrode can be effectively totally reflected in solar battery, therefore solar battery can taken into account
In the case where the reliability and reduction processing procedure cost of module, the absorptivity of solar battery is effectively promoted, and then can increase too
The wattage output of positive energy battery module.
Above-mentioned purpose according to the present invention proposes a kind of solar battery.This solar battery include substrate, emitter layer,
Passivation layer, at least a bus electrode, multiple finger electrodes and rear electrode.Substrate has front and the back side.Emitter layer is located at
At front.Passivation layer is configured on emitter layer.Bus electrode is configured at the front of substrate.Finger electrode is being configured at substrate just
It is connect at face and respectively with bus electrode, wherein each finger electrode includes coarse top surface and two inclined sides, this two inclined side
Face connects with coarse top surface respectively, coarse top surface include several strip structures, strip structure along the finger electrode at place width
The configuration of direction interval is spent, each strip structure extends along the length direction of the finger electrode at place.Rear electrode is configured at base
At the back side of plate.
An embodiment according to the present invention, above-mentioned each strip structure are extended in parallel along the length direction of finger electrode
Or it approaches and extends in parallel.
An embodiment according to the present invention, above-mentioned each strip structure extend to one of finger electrode far from bus electrode
At end.
An embodiment according to the present invention, above-mentioned strip structure include multiple first strip structures and multiple second strips
Structure, these first strip structures and the second strip structure are configured with the length direction interval for approaching parallel finger electrodes.
An embodiment according to the present invention, the bottom surface of above-mentioned each finger electrode and coarse top surface and two inclined sides
Between general trapezoidal shape.
An embodiment according to the present invention, end of the above-mentioned finger electrode far from bus electrode are connected by a connection electrode
It connects, multiple elongate configurations outstanding is configured in connection electrode, these elongate configuration intervals configure and along the length of connection electrode
Direction extends.
An embodiment according to the present invention, above-mentioned each strip structure include at least one side, and this at least one side
Tilt angle be about 20.9 degree to about 30 degree.
An embodiment according to the present invention, above-mentioned each strip structure include an at least arcuate flanks.
Above-mentioned purpose according to the present invention separately proposes a kind of solar cell module.This solar cell module includes upper
Plate, lower plate, above-mentioned solar battery, the first encapsulated layer and the second encapsulated layer.Solar battery be set to upper plate and lower plate it
Between.First encapsulated layer is set between upper plate and solar battery, to combine upper plate and solar battery.Second encapsulated layer is set to down
Between plate and solar battery, to combine lower plate and solar battery.
Above-mentioned purpose according to the present invention more proposes a kind of manufacturing method of solar battery.In this method, base is provided
Plate, wherein substrate has front and the back side.Emitter layer is formed at front.Passivation layer is formed on emitter layer.Form at least one
Bus electrode is at the front of substrate.Formed multiple finger electrodes in substrate positive place and respectively with it is aforementioned at least one confluence electricity
Pole connection, wherein each finger electrode include coarse top surface and two inclined sides, this two inclined side respectively with coarse top surface
Connecting, this coarse top surface includes multiple strip structures, and strip structure is configured along the width direction interval of the finger electrode at place,
Each strip structure extends along the length direction of the finger electrode at place.Rear electrode is formed at the back side of substrate.
An embodiment according to the present invention, forming above-mentioned finger electrode includes to form multiple finger electrode material layers in base
At the front of plate and the top surface of each finger electrode material layer is roughened.
An embodiment according to the present invention forms after above-mentioned finger electrode is also contained in roughening treatment, refers to these
Shape electrode material layer carries out drying and processing.
An embodiment according to the present invention forms above-mentioned finger electrode and is also contained in form finger electrode material layer in base
The positive place of plate and between being roughened, carries out drying and processing to finger electrode material layer.
An embodiment according to the present invention, above-mentioned each strip structure are extended in parallel along the length direction of finger electrode
Or it approaches and extends in parallel.
An embodiment according to the present invention, above-mentioned each strip structure extend to one of finger electrode far from bus electrode
At end.
An embodiment according to the present invention, above-mentioned strip structure include multiple first strip structures and multiple second strips
Structure, these first strip structures and the second strip structure are configured with the length direction interval for approaching parallel finger electrodes.
An embodiment according to the present invention, the bottom surface of above-mentioned each finger electrode and coarse top surface and two inclined sides
Between general trapezoidal shape.
An embodiment according to the present invention, end of the above-mentioned finger electrode far from bus electrode are connected by a connection electrode
It connects, multiple elongate configurations outstanding is configured in this connection electrode, these elongate configuration intervals configure and along the length of connection electrode
Direction is spent to extend.
An embodiment according to the present invention, above-mentioned each strip structure include at least one side, and this at least one side
Tilt angle be 20.9 degree to 30 degree.
An embodiment according to the present invention, above-mentioned each strip structure include an at least arcuate flanks.
Detailed description of the invention
For above and other purpose, feature, advantage and embodiment of the invention can be clearer and more comprehensible, appended attached drawing is said
It is bright as follows:
Fig. 1 is the diagrammatic cross-section for being painted a kind of solar cell module according to one embodiment of the present invention；
Fig. 2 is the upper schematic diagram for being painted a kind of solar battery according to one embodiment of the present invention；
Fig. 3 is the enlarged local section schematic diagram for being painted the AA hatching cutting solar battery obtained along Fig. 2；
Fig. 4 is the amagnified partial perspective schematic diagram for being painted a kind of solar battery according to one embodiment of the present invention；
Fig. 5 is the enlarged local section signal being painted according to a kind of solar cell module of one embodiment of the present invention
Figure；
Fig. 6 is the amagnified partial perspective schematic diagram for being painted a kind of solar battery according to one embodiment of the present invention；
Fig. 7 is the amagnified partial perspective signal being painted according to a kind of solar battery of another embodiment of the present invention
Figure；And
Fig. 8 is the manufacturing flow chart for being painted a kind of solar battery according to one embodiment of the present invention.
Specific embodiment
Fig. 1 is please referred to, is to be painted to show according to a kind of section of solar cell module of one embodiment of the present invention
It is intended to.In some embodiments, solar cell module 100 mainly may include solar battery 110, upper plate 120, lower plate 130,
First encapsulated layer 140 and the second encapsulated layer 150.As shown in Figure 1, in solar cell module 100, solar battery 110
It is arranged between upper plate 120 and lower plate 130.First encapsulated layer 140 is set between upper plate 120 and solar battery 110, to combine
Upper plate 120 and solar battery 110.Second encapsulated layer 150 is then set between lower plate 130 and solar battery 110, under combination
Plate 130 and solar battery 110.For example, pass through the program of high-temperature laminating, the first encapsulated layer 140 and the second encapsulated layer 150
Solar battery 110 can be combined with upper plate 120 and lower plate 130 respectively when molten state.
When solar cell module 100 is that single side enters light type and is that front enters light, upper plate 120 is transparent panel, such as glass
Glass plate.At this point, the first encapsulated layer 140 is also transparent configuration, lower plate 130 and the second encapsulated layer 150 can be transparent configuration or non-
Bright structure.And when solar cell module 100 is that single side enters light type and is that the back side enters light, lower plate 130 is transparent back panel, such as
Glass plate.At this point, the second encapsulated layer 150 is also transparent configuration, upper plate 120 and the first encapsulated layer 140 can be transparent configuration or non-
Transparent configuration.Solar cell module 100 be it is two-sided enter light type when, upper plate 120 and lower plate 130 are transparent panel, such as glass
Glass plate.At this point, the first encapsulated layer 140 and the second encapsulated layer 150 are transparent configuration.First encapsulated layer 140 and the second encapsulated layer
EVA material can be used in 150 implementations.
Referring to figure 2. to Fig. 4, wherein Fig. 2 is a kind of solar battery mould being painted according to one embodiment of the present invention
The top view of block, Fig. 3 are the enlarged fragmentary cross sections for being painted the AA hatching cutting solar battery obtained along Fig. 2,
Fig. 4 is the amagnified partial perspective schematic diagram for being painted the solar battery of Fig. 2.In some embodiments, solar battery 110 is main
Include substrate 112, emitter layer 113, passivation layer 115, at least a bus electrode 114, several finger electrodes 116 and back side electricity
Pole 117.The material of substrate 112 may be, for example, the semiconductor materials such as silicon.Substrate 112 includes positive 112a and the back side relative to each other
112b.Substrate 112 can be the first conductive type or the second conductive type substrate, and wherein the first conductive type may be, for example, p-type, and second leads
Electric type can be N-shaped.
As shown in figure 3, emitter layer 113 is located at the positive 112a of substrate 112.Emitter layer 113 can comprehensively be set to base
Position in plate 112 and close to front 112a.Emitter layer 113 can be the doped layer in substrate 112, and conductivity type is different from base
Plate 112.For example, when the electrical property of substrate 112 is N-type, emitter layer 113 can be p-type doped layer, such as boron (B), aluminium
(Al), gallium (Ga), indium (In) or thallium (Tl) doped layer.Passivation layer 115 can be covered on the positive 112a of substrate 112 and contact and penetrate
Pole layer 113, to be passivated positive 112a.In some instances, the material of passivation layer 115 can be silica, silicon nitride or aluminium oxide,
And first passivation layer 115 can be single layer structure or multilayer stacking structure.
In the embodiment shown in Figure 2, solar battery 110 includes that three bus electrodes 114 pass through passivation layer 115 and arrange
It arranges and configures at the positive 112a of substrate 112.Finger electrode 116 again pass through passivation layer 115 and configure substrate 112 just
At the 112a of face, wherein these finger electrodes 116 are connect with these three bus electrodes 114 respectively.These finger electrodes 116 respectively from
The extension of these three bus electrodes 114 is dispersed at the positive 112a of substrate 112, and electric current is transferred to bus electrode 114.One
It is a little it is two-sided enter light type solar battery example in, the back side 112b of substrate 112 is also equipped with extremely such as the configuration of positive 112a
A few bus electrode and several finger electrodes.
As shown in figure 3, each finger electrode 116 includes coarse top surface 116t and two inclined side 116s, the two inclinations
Side 116s connects with coarse top surface 116t respectively.In some instances, the bottom surface 116b of each finger electrode 116 and coarse top
General trapezoidal shape between face 116t and two inclined side 116s.Coarse top surface 116t includes several strip structures 118.In Fig. 3
Shown in embodiment, coarse top surface 116t includes two strip structures 118, and this two strip structures 118 are along finger-like electricity
The width direction 116w of pole 116 is close to configuration.In other examples, strip structure 118 can be spaced configuration to each other and between having
Away from non-close setting.In some illustrative examples, each strip structure 118 includes at least one side 118s, and side 118s
Tilt angle theta is about 20.9 degree to about 30 degree.The side 118s of strip structure 118 can be plane, convex globoidal or cancave cambered surface.
Referring to figure 4., these strip structures 118 extend along the length direction 116L of the finger electrode 116 at place.One
In a little illustrative examples, strip structure 118 is extended in parallel or is approached along the length direction 116L of finger electrode 116 and extends in parallel.
In other examples, the extending direction of strip structure 118 does not have the length direction 116L of parallel finger electrodes 116.Some
In specific examples, the extending direction of the strip structure 118 of part and the length direction 116L of finger electrode 116 are parallel, another portion
The extending direction of the strip structure 118 divided does not have the length direction 116L of parallel finger electrodes 116.As shown in figure 4, each strip
Structure 118 extend to finger electrode 116 far from one end 116e of bus electrode 114 at.Rear electrode 117 is then configured in substrate
At 112 back side 112b.
It referring to figure 5., is to be painted to put according to a kind of part of solar cell module of one embodiment of the present invention
Heavy gauge schematic diagram.In some embodiments, upper plate 120 is glass plate, and the refractive index of the first encapsulated layer 140 is substantially identical in upper
The refractive index of plate 120.At this point, the cirtical angle of total reflection degree between the upper surface and air of upper plate 120 is about 41.8 degree, finger electrode
The tilt angle theta of the side 118s of strip structure 118 on 116 need to be greater than about 20.9 degree.Whereby, towards the item of finger electrode 116
After the incident light 160 of shape structure 118 is reflected by strip structure 118, the light 160 of the upper surface of directive upper plate 120 can be totally reflected
It returns in substrate 112, therefore the absorptivity of solar battery 110 can be promoted, and then the output of 100 solar cell modules can be increased
Wattage.Since strip structure 118 is arranged on finger electrode 116, it can save and conductive welding is captured using light and is attached
There is light to relocate the increased cost of conductive welding institute of film, and the disconnection problem caused by avoiding because of thermal stress.
It please refers to referring concurrently to Fig. 2 and Fig. 6, wherein Fig. 6 is a kind of sun being painted according to one embodiment of the present invention
The amagnified partial perspective schematic diagram of energy battery.It end of the finger electrode 116 far from bus electrode 114 can be by a connection electrode 111
Connection.In some instances, as shown in fig. 6, may be configured with several elongate configuration 111a outstanding in connection electrode 111.These
Elongate configuration 111a can be close to configuration, or can be spaced configuration to each other and have spacing.Elongate configuration 111a can be along connection electricity
The length direction 111L of pole 111 extends.
Fig. 7 is please referred to, is the partial enlargement for being painted a kind of solar battery according to another embodiment of the present invention
Stereoscopic schematic diagram.In this embodiment, the coarse top surface 116t of each finger electrode 116a also includes several strip structures,
In several first strip structure 118a and several Article 2 shape structure 118b are included at least in these strip structures.These first
Shape structure 118a and the second strip structure 118b is with the interval length direction 116L parallel or nearly parallel to finger electrode 116a
Configuration.
Please with reference to Fig. 8 and Fig. 2 to Fig. 4, wherein Fig. 8 is the one kind being painted according to one embodiment of the present invention
The manufacturing flow chart of solar battery.In some embodiments, when manufacturing solar battery 110, step 200 can be first carried out, with
Substrate 112 is provided.Step 210 is carried out again, in a manner of being for example doped processing procedure to the positive 112a of substrate 112, and just
Emitter layer 113 is formed on the 112a of face.This emitter layer 113 extends on entire front 112a, and in practice, emitter layer 113 is set
In the position in substrate 112 and close to front 112a.Next, step 220 can be carried out, it is blunt to be formed using such as deposition technique
Change layer 115 and be covered on the positive 112a of substrate 112 and contact emitter layer 113, so as to being passivated front 112a.
Then, an at least bus electrode 114 is formed with multiple finger electrodes 116 on the positive 112a of substrate 112.One
In a little illustrative examples, when forming bus electrode 114 and finger electrode 116, step 230 can be first carried out, to utilize such as wire mark side
Formula forms an at least bus electrode material layer and multiple finger electrode material layers on the positive 112a of substrate 112.Bus electrode
The material of material layer and finger electrode material layer can be metal paste.Then, step 240 is carried out, to each finger electrode material
The top surface of layer is roughened.This roughening treatment is carried out using such as coining mode.To finger electrode material layer
It, can be before coining first to finger electrode material if the slurry for constituting finger electrode material layer is too soft when top surface is roughened
The bed of material carries out drying and processing, with finger electrode material layer of being slightly formed, then imprints finger electrode material layer.If constituting finger electrode
The slurry of material layer is more sticky, then can carry out drying and processing to finger electrode material layer again after coining.For example, it dries
The process temperatures of processing may be, for example, about 200 DEG C.
Then, step 250 can be carried out, to be sintered processing procedure to bus electrode material layer and finger electrode material layer, and
Bus electrode 114 is respectively formed to pass through passivation layer 115 with finger electrode 116 and contact with emitter layer 113.Finger electrode 116 divides
It does not connect with bus electrode 114, and is dispersed at the positive 112a of substrate 112 from the extension of bus electrode 114 respectively, and can will be electric
It spreads and is handed to bus electrode 114.The roughened processing in the top surface of finger electrode material layer is simultaneously formed by finger-like electricity after sintering
Pole 116 includes the coarse top surface 116t and two inclined side 116s to connect respectively with coarse top surface 116t.Coarse top surface 116t
Include one or more strip structures 118.In the example of multiple strip structures 118, these strip structures 118 can be along finger-like electricity
The width direction 116w of pole 116 is disposed proximate to, or is had spacing to each other rather than be disposed proximate to.For example, each strip
Structure 118 includes at least one side 118s, and the tilt angle theta of side 118s can be about 20.9 degree to about 30 degree.Strip structure
118 side 118s can be plane, convex globoidal or cancave cambered surface.
The extending direction of strip structure 118 can be parallel or nearly parallel with the length direction 116L of finger electrode 116；Or
Can not parallel finger electrode 116 length direction 116L；Or there are the extending direction parallel finger electrodes of the strip structure of part
116 length direction 116L, the extending direction of the strip structure of part do not have the length direction 116L of parallel finger electrodes 116.
In some embodiments, it can be processed by precision machinery, microscopic carvings are carved, are carried out in the way of laser carved or micro Process
The roughening treatment of finger electrode 116.When being roughened, in bus electrode material layer and it can be referred to using these modes
After shape electrode material layer completes sintering process, then sintered finger electrode material layer is roughened.In some examples
In son, bus electrode material layer and finger electrode material layer are formed using plating mode.Then, it recycles and for example imprints mode
Finger electrode material layer is roughened.
Then, step 260 is carried out, to form rear electrode 117 in substrate 112 using such as deposition or mode of printing
At the 112b of the back side, and it is substantially completed the production of solar battery 110.
By above-mentioned embodiment it is found that an advantage of the invention is exactly the finger-like electricity because of solar battery of the invention
Pole includes coarse top surface, and coarse top surface includes several strip structures.The strip structure of finger electrode can be by directive finger electrode
Light be effectively totally reflected in solar battery, therefore in the reliability for taking into account solar cell module and processing procedure cost can be reduced
In the case where, the absorptivity of solar battery is effectively promoted, and then the wattage output of solar cell module can be increased.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any in this technical field
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore this hair
Bright protection scope is subject to the view scope of which is defined in the appended claims.
Claims (20)
1. a kind of solar battery, which is characterized in that the solar battery includes:
One substrate has a front and a back side；
One emitter layer is located at the front；
One passivation layer is configured on the emitter layer；
An at least bus electrode is configured at the front of the substrate；
Multiple finger electrodes, are configured at the front of the substrate and at least a bus electrode is connect with this respectively, wherein each
The finger electrode includes a coarse top surface and two inclined sides, which connects with the coarse top surface respectively, should
Coarse top surface include multiple strip structures, the multiple strip structure along the finger electrode at place a width direction interval
Configuration, each strip structure extend along a length direction of the finger electrode at place；And
One rear electrode is configured at the back side of the substrate.
2. solar battery according to claim 1, which is characterized in that each strip structure is along the finger electrode
The length direction extend in parallel or close to extending in parallel.
3. solar battery according to claim 2, which is characterized in that each strip structure extends to finger-like electricity
Extremely at one end far from the bus electrode.
4. solar battery according to claim 2, which is characterized in that the multiple strip structure includes multiple first
Shape structure and multiple second strip structures, the multiple first strip structure are parallel to approach with the multiple second strip structure
The length direction interval of the finger electrode configures.
5. solar battery according to claim 1, which is characterized in that the bottom surface of each finger electrode is coarse with this
General trapezoidal shape between top surface and two inclined side.
6. solar battery according to claim 1, which is characterized in that the multiple finger electrode is far from the bus electrode
End connected by a connection electrode, in the connection electrode be configured with multiple elongate configurations outstanding, the multiple elongate configuration
Interval configures and extends along a length direction of the connection electrode.
7. solar battery according to claim 1, which is characterized in that each strip structure includes at least side
Face, and a tilt angle of at least one side is 20.9 degree to 30 degree.
8. solar battery according to claim 1, which is characterized in that each strip structure includes an at least arc
Side.
9. a kind of solar cell module, which is characterized in that the solar cell module includes:
One upper plate；
One lower plate；
Just like the solar battery of any one of claim 1~8, it is set between the upper plate and the lower plate；
One first encapsulated layer is set between the upper plate and the solar battery, to combine the upper plate and the solar battery；And
One second encapsulated layer is set between the lower plate and the solar battery, to combine the lower plate and the solar battery.
10. a kind of manufacturing method of solar battery, which is characterized in that the manufacturing method of the solar battery includes:
A substrate is provided, wherein the substrate has a front and a back side；
An emitter layer is formed at the front；
A passivation layer is formed on the emitter layer；
An at least bus electrode is formed at the front of the substrate；
Forming multiple finger electrodes, at least a bus electrode is connect at the front of the substrate and respectively with this, wherein each institute
Stating finger electrode includes a coarse top surface and two inclined sides, which connects with the coarse top surface respectively, this is thick
Rough top surface includes multiple strip structures, and the multiple strip structure is matched along a width direction interval of the finger electrode at place
It sets, each strip structure extends along a length direction of the finger electrode at place；And
A rear electrode is formed at the back side of the substrate.
11. the manufacturing method of solar battery according to claim 10, which is characterized in that form the multiple finger-like electricity
Pole includes:
Multiple finger electrode material layers are formed at the front of the substrate；And
One roughening treatment is carried out to a top surface of each finger electrode material layer.
12. the manufacturing method of solar battery according to claim 11, which is characterized in that form the multiple finger-like electricity
After pole is also contained in the roughening treatment, a drying and processing is carried out to the multiple finger electrode material layer.
13. the manufacturing method of solar battery according to claim 11, which is characterized in that form the multiple finger-like electricity
Pole is also contained in form the multiple finger electrode material layer at the front of the substrate and carry out between the roughening treatment,
One drying and processing is carried out to the multiple finger electrode material layer.
14. the manufacturing method of solar battery according to claim 10, which is characterized in that each strip structure edge
The length direction of the finger electrode extend in parallel or close to extending in parallel.
15. the manufacturing method of solar battery according to claim 14, which is characterized in that each strip structure prolongs
Reach the finger electrode far from one end of the bus electrode at.
16. the manufacturing method of solar battery according to claim 14, which is characterized in that the multiple strip structure packet
Containing multiple first strip structures and multiple second strip structures, the multiple first strip structure and the multiple second strip knot
Structure is configured with the length direction interval for approaching the parallel finger electrode.
17. the manufacturing method of solar battery according to claim 10, which is characterized in that each finger electrode
General trapezoidal shape between bottom surface and the coarse top surface and two inclined side.
18. the manufacturing method of solar battery according to claim 10, which is characterized in that the multiple finger electrode is remote
End from the bus electrode is connected by a connection electrode, and multiple elongate configurations outstanding are configured in the connection electrode, described
Multiple elongate configuration intervals configure and extend along a length direction of the connection electrode.
19. the manufacturing method of solar battery according to claim 10, which is characterized in that each strip structure packet
Containing at least one side, and a tilt angle of at least one side is 20.9 degree to 30 degree.
20. the manufacturing method of solar battery according to claim 10, which is characterized in that each strip structure packet
Containing an at least arcuate flanks.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106133448 | 2017-09-28 | ||
| TW106133448A TW201916384A (en) | 2017-09-28 | 2017-09-28 | Solar cell and method for manufacturing the same, and solar cell module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109585579A true CN109585579A (en) | 2019-04-05 |
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ID=65919519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711159534.9A Withdrawn CN109585579A (en) | 2017-09-28 | 2017-11-20 | Solar battery and its manufacturing method and solar cell module |
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| Country | Link |
|---|---|
| CN (1) | CN109585579A (en) |
| TW (1) | TW201916384A (en) |
-
2017
- 2017-09-28 TW TW106133448A patent/TW201916384A/en unknown
- 2017-11-20 CN CN201711159534.9A patent/CN109585579A/en not_active Withdrawn
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| Publication number | Publication date |
|---|---|
| TW201916384A (en) | 2019-04-16 |
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