CN101969087B - Method for improving efficiency of solar battery - Google Patents

Method for improving efficiency of solar battery Download PDF

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Publication number
CN101969087B
CN101969087B CN2010102678209A CN201010267820A CN101969087B CN 101969087 B CN101969087 B CN 101969087B CN 2010102678209 A CN2010102678209 A CN 2010102678209A CN 201010267820 A CN201010267820 A CN 201010267820A CN 101969087 B CN101969087 B CN 101969087B
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China
Prior art keywords
solar battery
mask
solar cell
battery efficiency
antireflective coating
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CN101969087A (en
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黄惠东
魏文豪
陈永虹
郑智雄
张伟娜
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NANAN SANJING SUNSHINE AND POWER Co Ltd
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NANAN SANJING SUNSHINE AND POWER Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

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Abstract

The invention relates to a method for improving the efficiency of a solar battery, belonging to the field of a solar battery. The method utilizes a masking film mode to cover and protect the electrode area of the illuminated face of the finished solar battery, then prepares a single-layer or multi-layer anti-reflecting film on the upper surface of the original anti-reflecting film, and removes the masking film of the electrode area after preparation. The method does not influence the conventional solar battery production technique, can be directly connected with the existing technique and can carry out improvement again on the performance of the finished solar battery.

Description

A kind of method that improves solar battery efficiency
Technical field
The present invention relates to a kind of manufacture method of solar cell.Particularly, the present invention relates to a kind of gate line electrode and antireflective coating of improving all in the method for the solar cell finished product transformation efficiency of sensitive surface.
Background technology
Solar cell reduces the light reflection on battery sheet surface by making antireflective coating at sensitive surface, improves the sunlight utilance.The material that can be used to prepare antireflective film at present has: MgF 2, SiO 2, Al 2O 3, SiO, Si 3N 4, TiO 2, Ta 2O 5, ZnS etc., refractive index and thickness collocation by utilizing different materials reduce reflectivity.On the basis of optimizing, the anti-reflective effect of multilayer film is better, but still higher because of the cost of manufacture of present double-layer reflection reducing coating, most of manufacture of solar cells still adopts the monofilm manufacturing technology.For example, crystal silicon solar energy battery general using PECVD deposition techniques Si 3N 4Material is as the individual layer antireflective coating.Individual layer antireflective coating technology is owing to adopt single material of planting, refractive index and spectral response performance thereof are fixed, even if adopt the optimal thickness preparation, antireflective effect for spectrum still mainly concentrates on a certain wave band, anti-reflective effect is relatively limited to, and make the comprehensive reducing reflecting effect of whole spectrum better, then need increase the quantity of antireflective coating, can there be report to adopt SiO abroad by the mutual matching optimization spectrum utilization ratio of different antireflective coatings before 2With Si 3N 4Combination, MgF 2With ZnS combination, SiO 2With TiO 2The method of double layer antireflection coating is made in combinations etc., all is the embodiment of this method.But the present multilayer film formation method of reporting, all are the antireflective film production process in solar battery sheet manufacturing process, (manufacture craft of conventional solar cell generally comprises making herbs into wool, diffusion, etching, goes operations such as PSG, antireflective coating, silk screen printing, sintering as shown in Figure 1) by the continuous coating realization.If adopt this technology path, promptly on the individual layer antireflective coating, make other antireflective coating again, and then sintering, then solar cell properties occurs and be difficult to coupling with present sintering process through regular meeting, must be optimized again sintering process, just can make the battery performance optimum, increase technical complexity; And need configuration whole piece manufacture of solar cells line, just can finish making, equipment cost and the production run cost height of double-layer reflection reducing coating battery energy battery finished product.
Summary of the invention
The technical problem that the present invention solves is: a kind of manufacture method that improves the solar cell photoelectric conversion efficiency is provided.Its advantage is, used technology does not need existing manufacturing technique is changed, can be directly to the solar cell finished product, carry out the preparation again and the optimization of antireflective film, be not only applicable to the product of individual layer antireflective coating, to making the solar cell finished product of double-layer reflection reducing coating, also can carry out the further optimization of properties of product.
Technical scheme of the present invention is:
A kind of method that improves solar battery efficiency may further comprise the steps:
Step 1, the solar cell finished surface is cleaned;
Step 2, select the process conditions that can bear step 3 for use and the material that does not produce damage as mask, preparation and battery plate electrode main grid line length, mask that width is identical, complete clad battery sheet sensitive surface electrode main grid line;
Step 3, the battery sheet is carried out antireflective coating preparation, make the entire cell sensitive surface cover one or more layers and the different antireflective coating of original antireflective film material;
If the step 4 mask covers for the metal solder mode, directly enter step 5; Cover if mask is non-welding manner, the solar battery sheet that then step 3 is prepared antireflective coating is removed mask, carries out step 5 afterwards again;
Step 5, the solar cell surface of removing behind the mask is cleaned.
In preferred embodiment of the present invention, the described solar cell finished surface of step 1 is coated with one or more layers antireflective coating.
In preferred embodiment of the present invention, the described solar battery product of step 1 is polysilicon or monocrystaline silicon solar cell product.
In preferred embodiment of the present invention, the material of described mask comprises organic membrane, inoranic membrane, metal.It selects for use principle not produce the material of damage for the process conditions that can bear step 3.
In preferred embodiment of the present invention, described organic membrane comprises: polyimides adhesive plaster, Teflon adhesive plaster, glass fibre adhesive plaster, polyvinyl chloride adhesive plaster, polyester adhesive plaster etc.
In preferred embodiment of the present invention, described inoranic membrane comprises: SiO 2, Si 3N 4, Al 2O 3Deng.
In preferred embodiment of the present invention, described metal comprises: corronil, stainless steel alloy, ormolu, aluminium alloy etc.
In preferred embodiment of the present invention, that the applying method of described mask and electrode main grid line comprises is bonding, welding, directly hide etc.
In preferred embodiment of the present invention, the material that film is established in the described anti-reflection of step 3 is MgF 2, SiO 2, Al 2O 3, SiO, Si 3N 4, TiO 2, Ta 2O 5Or ZnS, thickness is 1-300nm.
Method of the present invention, directly, carry out the preparation again and the optimization of antireflective film, by the battery sheet that this method realized to the existing solar cell finished product that covers antireflective film, efficient that can more original solar cell obtains again that a step promotes, and is applicable to the product of single or multiple lift antireflective coating; Compare with existing multilayer antireflective film preparation method, method involved in the present invention is independent of existing manufacture of solar cells technology, do not influence the production of existing solar battery sheet, the existing technology that can directly be connected solar cell again, existing solar cell finished product is realized reprocessing, applicability is strong, is used to realize that the required configuration device of this technology is few, cost is low.
Description of drawings
Fig. 1 is the common process schematic diagram;
Fig. 2 is a process schematic representation of the present invention;
Fig. 3 is the schematic diagram of solar cell sensitive surface;
Fig. 4 is an electrode wires mask covered structure schematic diagram of the present invention
Fig. 5 carries out structural representation after antireflective coating is handled for the present invention
Fig. 6 removes structural representation behind the mask for the present invention
Among the figure, the substrate of 1-battery sheet; The 2-electrode wires; The 3-mask; The 4-antireflective coating
Embodiment
Below in conjunction with accompanying drawing and concrete implementation step the present invention is further specified:
This programme mainly is divided into technical scheme 1 (mask is not for being used for the organic substance or the inorganic matter of the welding of solar components battery plate electrode) and technical scheme 2 by the material of mask and coverage mode, and (mask is the conducting metal that can be used for the welding of solar components battery plate electrode, and adopt welding manner), as shown in Figure 2.
Technical scheme 1:
Step 1 cleans the solar cell finished surface with alcohol.
Step 2 preparation and battery plate electrode main grid line length, the mask that width is identical, complete clad battery sheet sensitive surface electrode main grid line, the material of mask can be organic substance or inorganic matter, and the selecting for use of mask material do not produce with the process conditions that can bear step 3 and to damage is prerequisite.
Step 3 is carried out the antireflective coating preparation with the battery sheet, can prepare one or more layers antireflective film, and the material of antireflective film mainly contains: MgF 2, SiO 2, Al 2O 3, SiO, Si 3N 4, TiO 2, Ta 2O 5, ZnS, thickness range is at 1-300nm.
Step 4 will prepare the solar battery sheet of antireflective film and remove mask.
Step 5 cleans the solar cell surface of removing behind the mask.
Technical scheme 2:
Step 1 cleans the solar cell finished surface with alcohol.
Step 2 preparation and battery plate electrode main grid line length, the approaching metal electrode of width, by welding clad battery sheet sensitive surface electrode main grid line, material to select for use can satisfy the welding of assembly electrode and to bear the process conditions of step 3 and influence the solder bond performance be prerequisite.
Step 3 is carried out the antireflective coating preparation with the battery sheet, can prepare one or more layers antireflective film, and the material of antireflective film mainly contains: MgF 2, SiO 2, Al 2O 3, SiO, Si 3N 4, TiO 2, Ta 2O 5, ZnS, thickness range is at 1-300nm.
Solar cell surface after step 4 is handled step 3 cleans.
Embodiment 1
1, adopts the monocrystalline solar cells sheet of individual layer antireflective coating as shown in Figure 3, the membranous Si of antireflective 3N 4, Si wherein 3N 4Refractive index 2.0, thickness are 80nm;
2, with alcohol battery finished product sheet sensitive surface and grid line are cleaned;
3, measuring battery sensitive surface side line specification is 125mm*2mm;
4, the preparation specification is the polyimides adhesive plaster (PI adhesive plaster) of 2mm*125mm, covers the grid line of sensitive surface fully, as shown in Figure 4;
5, the preparation antireflective coating is put into reacting furnace with step 4 prepared cell sheet, by plasma reinforced chemical vapour deposition at battery sensitive surface growth SiO 2Film, temperature 250 degree, thickness 100nm, as shown in Figure 5;
6, the PI adhesive plaster is peeled off from battery surface, as shown in Figure 6;
7, the solar cell surface behind the removal PI adhesive plaster mask is cleaned with alcohol.
Embodiment 2
1, adopts the monocrystalline solar cells sheet (as shown in Figure 3) of individual layer antireflective coating, the membranous Si of antireflective 3N 4, Si wherein 3N 4Refractive index 2.0, thickness are 80nm;
2, with alcohol battery finished product sheet sensitive surface and grid line are cleaned;
3, measuring battery sensitive surface side line specification is 125mm*2mm;
4, the preparation specification is the Al of 2mm*125mm 2O 3Film covers the grid line of sensitive surface, as shown in Figure 4 fully;
5, the preparation antireflective coating is put into reacting furnace with step 4 prepared cell sheet, by plasma reinforced chemical vapour deposition at battery sensitive surface growth SiO 2Film, temperature 250 degree, thickness 100nm, as shown in Figure 5;
6, with Al 2O 3Film is from battery grid line surface removal, and the result as shown in Figure 6;
7, to removing Al 2O 3Solar cell surface behind the film mask cleans with alcohol.
Embodiment 3:
1, adopts the multicrystalline solar cells of individual layer antireflective coating as shown in Figure 3, the membranous Si of antireflective 3N 4, Si wherein 3N 4Refractive index 2.0, thickness are 60nm;
2, with alcohol battery finished product sheet sensitive surface and grid line are cleaned;
3, the corronil line of preparation and thick grid line same widths;
4, alloy wire and grid line are covered and weld applying fully, as shown in Figure 4;
5, will weld battery sheet after fitting as in the PECVD stove, by plasma reinforced chemical vapour deposition at battery sensitive surface growth SiO 2Film, temperature 250 degree, thickness 100nm, as shown in Figure 5;
6, solar cell surface is cleaned with alcohol.
Above-mentioned only is specific embodiments of the invention, but design concept of the present invention is not limited thereto, and allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection range of the present invention.

Claims (9)

1. method that improves solar battery efficiency may further comprise the steps:
Step 1, the solar cell finished surface is cleaned;
Step 2, select the process conditions that can bear step 3 for use and the material that does not produce damage as mask, preparation and battery plate electrode main grid line length, mask that width is identical, complete clad battery sheet sensitive surface electrode main grid line;
Step 3, the battery sheet is carried out antireflective coating preparation, make the entire cell sensitive surface cover one or more layers and the different antireflective coating of original antireflective film material;
If the step 4 mask covers for the metal solder mode, directly enter step 5; Cover if mask is non-welding manner, the solar battery sheet that then step 3 is prepared antireflective coating is removed mask, carries out step 5 afterwards again;
Step 5, solar cell surface is cleaned.
2. a kind of method that improves solar battery efficiency as claimed in claim 1 is characterized in that: the described solar cell finished surface of step 1 is coated with one or more layers antireflective coating.
3. a kind of method that improves solar battery efficiency as claimed in claim 1 or 2 is characterized in that: the described solar cell finished product of step 1 is polysilicon or monocrystaline silicon solar cell finished product.
4. a kind of method that improves solar battery efficiency as claimed in claim 1, it is characterized in that: the material of described mask comprises organic membrane, inoranic membrane, metal.
5. a kind of method that improves solar battery efficiency as claimed in claim 4, it is characterized in that: described organic membrane comprises: polyimides adhesive plaster, Teflon adhesive plaster, glass fibre adhesive plaster, polyvinyl chloride adhesive plaster or polyester adhesive plaster.
6. a kind of method that improves solar battery efficiency as claimed in claim 4, it is characterized in that: described inoranic membrane comprises: SiO 2, Si 3N 4Or Al 2O 3
7. a kind of method that improves solar battery efficiency as claimed in claim 4, it is characterized in that: described metal comprises: corronil, stainless steel alloy, ormolu or aluminium alloy.
8. a kind of method that improves solar battery efficiency as claimed in claim 4 is characterized in that: the applying method of described mask and electrode main grid line is bonding, welding or directly hides.
9. a kind of method that improves solar battery efficiency as claimed in claim 1 is characterized in that: the material of the described antireflective coating of step 3 is MgF 2, SiO 2, Al 2O 3, SiO, Si 3N 4, TiO 2, Ta 2O 5Or ZnS, thickness is 1-300nm.
CN2010102678209A 2010-08-30 2010-08-30 Method for improving efficiency of solar battery Expired - Fee Related CN101969087B (en)

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CN102790125A (en) * 2011-05-17 2012-11-21 南安市三晶阳光电力有限公司 Method for improving efficiency of solar cell
CN102810600A (en) * 2012-08-16 2012-12-05 英利能源（中国）有限公司 Preparation method of crystalline silicon solar cell
CN109817729B (en) * 2019-02-18 2020-12-25 安徽九颍智能设备有限公司 CuInSe capable of reflecting ultraviolet light2Battery antireflection layer and preparation method thereof

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US5871591A (en) * 1996-11-01 1999-02-16 Sandia Corporation Silicon solar cells made by a self-aligned, selective-emitter, plasma-etchback process
CN101436616B (en) * 2008-12-05 2010-06-23 江阴海润太阳能电力有限公司 Double-layer reflection-decreasing film for silicon solar cell and preparation method thereof

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