WO2014087736A1 - Cellule solaire et son procédé de fabrication - Google Patents

Cellule solaire et son procédé de fabrication Download PDF

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Publication number
WO2014087736A1
WO2014087736A1 PCT/JP2013/077556 JP2013077556W WO2014087736A1 WO 2014087736 A1 WO2014087736 A1 WO 2014087736A1 JP 2013077556 W JP2013077556 W JP 2013077556W WO 2014087736 A1 WO2014087736 A1 WO 2014087736A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
substrate
wiring
back electrode
electrode type
Prior art date
Application number
PCT/JP2013/077556
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English (en)
Japanese (ja)
Inventor
康志 吉川
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シャープ株式会社
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Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to CN201390000966.4U priority Critical patent/CN204885192U/zh
Publication of WO2014087736A1 publication Critical patent/WO2014087736A1/fr

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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
    • H01L31/04—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
    • H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
    • 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

Definitions

  • the present invention relates to a solar cell that can be used for photovoltaic power generation and a method for manufacturing the solar cell.
  • a pn junction is formed by diffusing impurities of a conductivity type opposite to the silicon substrate on the light receiving surface of a single crystal or polycrystalline silicon substrate, and the light reception of the silicon substrate is performed.
  • Solar cells formed by connecting a plurality of double-sided electrode type solar cells each having an electrode formed on the surface and the back surface are mainly used.
  • back electrode type solar cells have been developed in which electrodes are not formed on the light receiving surface of a silicon substrate, but P electrodes and N electrodes are formed on the back surface thereof.
  • a back electrode type solar cell since there is generally no electrode on the light receiving surface, there is no shadow loss due to the electrode, and a higher output than a solar cell having electrodes on the light receiving surface and the back surface of the silicon substrate can be obtained. There is expected.
  • a wiring board is adopted to facilitate the connection of the solar cells, and in the back electrode type solar battery cell, it is possible to connect using a wiring substrate in which wiring is formed on an insulating base material. Has been sought.
  • the solar cell and the wiring board are connected to each other by bonding the solar cell and the wiring board using an adhesive.
  • a solar cell and a manufacturing method thereof have already been proposed (see, for example, Patent Document 1).
  • the wiring board is formed by forming a desired wiring pattern on an insulating substrate, but a flexible film substrate such as a resin film is used in addition to the insulating substrate using a hard substrate.
  • the solar cell described in Patent Document 1 has a configuration in which an adhesive is filled and bonded between a solar battery cell and a wiring substrate in which a wiring pattern is formed on a flat insulating base material.
  • the gap between the electrode non-formation region of the solar battery cell and the insulating base material has to be filled with a large amount of adhesive.
  • the configuration in which the solar battery cell and the wiring board are bonded using a large amount of adhesive causes a problem in that productivity deteriorates. Therefore, it is desired that the solar cell can be bonded with a small amount of adhesive and has excellent productivity, and a method for manufacturing the solar cell.
  • the present invention provides a solar battery including a back electrode type solar battery cell and a wiring board, and a solar battery capable of joining the solar battery cell and the wiring board without using a large amount of adhesive, and the production thereof. It aims to provide a method.
  • the present invention provides a back electrode type solar cell in which two types of electrodes having different polarities are provided on one surface of a substrate, and a wiring corresponding to the electrode on one surface of an insulating substrate.
  • a wiring board wherein the electrode of the back electrode type solar cell and the wiring of the wiring board are electrically connected, and the insulating base material is the back electrode type. It is characterized in that it is bent toward the solar cell side and a recess is formed between the adjacent electrodes of the back electrode type solar cell.
  • the insulating base material is bent toward the back electrode type solar battery cell to form a recess between the adjacent electrodes, so that the gap between the solar battery cell and the insulating base material is filled.
  • the amount of adhesive used can be reduced.
  • the insulation between adjacent electrodes can also be ensured through this insulating substrate. That is, it is possible to obtain a solar battery that can join the solar battery cell and the wiring board without using a large amount of adhesive.
  • the recessed portion of the insulating base material is in contact with the back electrode type solar battery cell between the adjacent electrodes of the back electrode type solar battery cell.
  • the recessed portion of the insulating base material is in contact with the opposing side surfaces of the wirings adjacent to each other.
  • the back electrode type solar cell and the wiring substrate are sealed with a sealing material, and the recess is filled with a sealing material, so that an insulating substrate is provided between wirings adjacent to each other on the wiring substrate. It is preferable that a sealing material exists through the material.
  • the present invention also includes a back electrode type solar cell in which two types of electrodes having different polarities are provided on one surface of the substrate, and a wiring substrate in which wiring corresponding to the electrodes is provided on one surface of the insulating base material.
  • a method for manufacturing a solar cell wherein the back electrode solar cell is arranged on the wiring substrate so that the electrode of the back electrode solar cell and the wiring of the wiring substrate face each other.
  • the back electrode type solar cell was placed It is characterized in that it comprises a sealing step of sealing the serial wiring board. According to this configuration, since it is not necessary to use an adhesive to ensure insulation, it is possible to obtain a method for manufacturing a solar battery that can join the solar battery cell and the wiring board without using a large amount of adhesive.
  • a flexible film substrate is used as the insulating substrate, and the substrate bending step is performed by evacuating the film substrate to the back electrode type solar cell side. It is preferable that the vacuuming process bends.
  • a base-material bending process and a sealing process are as a series of processes through the heating vacuum press-bonding process performed at a predetermined heating temperature and a predetermined vacuum pressure using a laminator apparatus. Preferably, it is done.
  • the insulating base material of the wiring board interposed on the electrode surface of the back electrode type solar battery cell is bent toward the back electrode type solar battery cell and is adjacent to each other of the back electrode type solar battery cell.
  • FIG. 1 shows a schematic cross-sectional view of an example of the solar cell 1 of the present invention.
  • This solar cell 1 joins the solar cell 10 and the wiring board 20, and seals together through the sealing material 2, and forms a solar cell sealing body,
  • This solar cell sealing body Both the front and back surfaces are covered with a translucent substrate 3 (glass substrate) and a weather resistant film 4 (back film).
  • an antireflection film 12 is formed on the light-receiving surface (surface on which sunlight is mainly incident) of the n-type or p-type silicon substrate 11 of the solar battery cell 10, and the back surface of the silicon substrate 11 (
  • the n-type impurity doped region 13 formed by diffusing n-type impurities and the p-type impurity doped region 14 formed by diffusing p-type impurities have a predetermined interval on the surface opposite to the light receiving surface). They are alternately formed.
  • the solar cell 10 is a back electrode type solar cell 10 in which two types of electrodes having different polarities are provided on one surface of a substrate (silicon substrate 11). It may also be referred to as solar cell 10 or back electrode type solar cell 10.
  • a passivation film 17 is formed on the back surface of the silicon substrate 11, and an N electrode 15 is formed so as to be in contact with the n-type impurity doping region 13 through a contact hole formed in the passivation film 17.
  • a P electrode 16 is formed so as to be in contact with the doping region 14.
  • the antireflection film 12 and the passivation film 17 can be formed from, for example, a silicon nitride film or a silicon oxide film.
  • the wiring substrate 20 is a substrate in which a desired wiring pattern (N wiring 22 and P wiring 23) is formed on an insulating substrate 21, and a film material having flexibility and a material using a hard material as an insulating substrate.
  • a desired wiring pattern N wiring 22 and P wiring 23
  • a film material having flexibility and a material using a hard material as an insulating substrate.
  • the wiring board 20 having flexibility using the insulating base material 21 using a polyester film such as PET (polyethylene terephthalate) or PEN (polyethylene naphthalate) is used.
  • the wiring substrate 20 is formed by bonding an insulating film serving as a base material and a metal foil using an adhesive or the like, forming a protective resist on the surface of the metal foil in a desired shape, and then exposing the exposed metal foil.
  • the wiring board 20 having a desired wiring pattern is formed by etching and removing the resist.
  • the solar cell according to the present embodiment includes the back electrode type solar cell 10 in which two types of electrodes having different polarities are provided on one surface of the substrate (silicon substrate 11), and the electrode on one surface of the insulating base material 21.
  • a solar cell 1 including a flexible wiring board 20 provided with wirings (N wiring 22 and P wiring 23) corresponding to.
  • the wiring substrate 20 is made of a flexible film base material, it can be easily bent by being vacuumed after being bonded to the back electrode type solar battery cell 10. It can also be bent easily by being deformed while heating. In any case, it can be bent according to the surface shape of the mating member to be bonded (bonded).
  • the electrodes (N electrode 15 and P electrode 16) of the back electrode type solar cell 10 and the wiring (N wiring 22 and P wiring 23) of the wiring board 20 are electrically connected.
  • the insulating base material 21 is bent toward the back electrode type solar cell side (via a predetermined base material bending step) and between the adjacent electrodes of the back electrode type solar cell 10 (to each other).
  • a recess K is formed between adjacent wirings.
  • the insulating base material 21 is bent toward the back electrode type solar cell side and forms a recess K between the electrodes (N electrode 15 and P electrode 16) adjacent to each other.
  • the amount of adhesive used to fill the gap between the insulating base 21 and the insulating base 21 can be reduced.
  • the recessed part of the insulating base material 21 is the structure which contacts the back surface electrode type photovoltaic cell 10 between the electrodes which mutually adjoin the back surface electrode type photovoltaic cell 10, this adjacent electrode will be ensured. Since insulation is possible, it is not necessary to use an adhesive to ensure insulation, and the amount of adhesive can be reduced, which is preferable.
  • the recessed part of the insulating base material 21 is in contact with the opposing side surfaces of the wirings adjacent to each other. If it is this structure, adjacent wiring can be insulated reliably and also a sealing material can be filled between adjacent wiring. Therefore, adjacent wirings can be reliably insulated via the sealing material filled in the depressions K, and positional deviation between the solar battery cell 10 and the wiring board 20 can be reliably prevented. Moreover, since the gap between the electrodes and between the wirings can be filled with the sealing material, the mechanical strength of the solar cell 1 can be improved.
  • the electrodes (N electrode 15 and P electrode 16) provided in the solar battery cell 10 will be described using FIG. 2, and the wiring substrate 20 including the N wiring 22 and the P wiring 23 will be described using FIG.
  • the electrodes (N electrode 15 and P electrode 16) provided in the solar battery cell 10 according to the present embodiment include the strip-shaped N electrode 15 and P electrode 16 on one surface of the silicon substrate 11. It is set as the structure provided alternately in the up-down direction. That is, two types of electrodes having different polarities are alternately provided in a comb shape on one surface of the substrate.
  • the wiring board 20 provided with the wiring electrically connected to the electrode has a long shape for integrally joining the plurality of solar cells 10 as shown in FIG. 3, for example.
  • the wiring board 20 according to the present embodiment has a length for integrally joining the four photovoltaic cells 10 as shown in FIG.
  • the insulating base 21 having this length is integrally formed with N wirings 22 and P wirings 23 corresponding to the strip-shaped N electrodes 15 and P electrodes 16 of the four solar cells 10.
  • connection electrode 24 for electrically connecting the N wiring 22 and the P wiring 23 respectively corresponding to the adjacent solar cells 10 is provided, and one end portion in the longitudinal direction of the insulating base material 21 is provided.
  • the bus bar P electrode 25 is provided at the other end, and the bus bar N electrode 26 is provided at the other end.
  • a mark, a slit, or the like for alignment of the solar cells 10 to be joined is provided so that the plurality of solar cells 10 can be joined (bonded) at an accurate position, and wiring is performed. It is preferable that the connection error can be suppressed.
  • the solar cells 10 are bonded to the wiring substrate 20 to join the electrodes (N electrode 15 and P electrode 16) on the solar cell 10 side and the wirings (N wiring 22 and P wiring 23) on the wiring substrate 20 side.
  • the bonding between the electrode and the wiring can be performed using a conventionally known conductive adhesive or solder, but in a state where the electrode on the solar cell 10 side and the wiring on the wiring substrate 20 side are aligned, It is also possible to bond the solar battery cell 10 and the wiring board 20 together.
  • the adhesive is disposed in a part of the region other than the electrodes and the wiring, and the solar cells 10 are temporarily fixed to the wiring substrate 20, and the sealing is performed through the sealing material 2 described above. By stopping, it becomes possible to electrically connect the electrode on the solar cell 10 side and the wiring on the wiring substrate 20 side.
  • connection between the wiring of the wiring board 20 and the electrode of the solar battery cell 10 can be made by direct contact without using a conductive adhesive or solder, in addition to shortening the manufacturing process, the connection The electrical resistance in the portion can be lowered, and the electrical characteristics of the solar cell can be improved.
  • the region where the adhesive is disposed is provided at two locations on the diagonal line with respect to one solar battery cell 10.
  • the adhesives SB ⁇ b> 1 and SB ⁇ b> 2 are disposed on the insulating base material 21 of the wiring board 20 at two positions on the diagonal line where the respective solar cells 10 are joined. Then, the solar cells 10 are wired so that the positions of the electrodes (N electrode 15 and P electrode 16) on the solar cell 10 side and the wirings (N wiring 22 and P wiring 23) on the wiring board 20 side are matched. Temporarily fasten to the substrate 20.
  • the wiring substrate 20 is partially bonded to the outer peripheral portion of the solar battery cell 10 using the adhesive SB (SB1, SB2).
  • the adhesive SB is preferably an insulating adhesive (including a pressure-sensitive adhesive).
  • a silicone adhesive, an acrylic adhesive, an epoxy adhesive, a rubber adhesive, or the like is used. it can.
  • resin may be arrange
  • a laminating process for laminating and forming the sealing material 2, the translucent substrate 3, the weather resistant film 4, and the like, and the sealing material 2 are heated.
  • a sealing step of hardening after softening is performed.
  • the sealing material 2 it is preferable to use a light-transmitting sealing material such as EVA (ethylene vinyl acetate) resin.
  • EVA ethylene vinyl acetate
  • Sheet-like EVA resin is laminated on the upper and lower sides of the solar cell 10 and the wiring substrate 20 that are bonded together.
  • the predetermined temperature or the predetermined vacuum pressure in the sealing process is a temperature at which the insulating base 21 to be used is bent to form the depression K and the used sealing material is softened to fill the depression K. It is a vacuum pressure.
  • the presence of the sealing material via the insulating base material 21 between the wirings adjacent to each other on the wiring board 20 improves the degree of pressure bonding between the solar battery cell 10 and the wiring board 20, so that Insulation between the matching electrodes can be increased. Therefore, it is possible to ensure electrical connection between the electrode on the solar cell 10 side and the wiring on the wiring substrate 20 side, and it is necessary to use a large amount of adhesive to ensure insulation between the electrodes. Therefore, it is possible to provide the solar cell 1 excellent in productivity.
  • the heating is performed to a predetermined temperature in the sealing step, it is preferable to use an adhesive SB that exhibits stable adhesiveness even when exposed to the predetermined temperature. Moreover, the reliability of the electrical connection between the solar battery cell 10 and the wiring board 20 can be maintained by exhibiting stable adhesiveness even after heating.
  • the insulating base material 21 is relatively inexpensive and exhibits reliable insulating properties, it is preferably a material that is bent to the side of the solar battery cell 10 by evacuation to form the depression K and has a thickness.
  • a polyester film such as PET (polyethylene terephthalate) or PEN (polyethylene naphthalate) is used.
  • the thickness is preferably about 25 to 150 ⁇ m, more preferably about 50 to 100 ⁇ m.
  • the method for manufacturing a solar cell according to the present embodiment includes the back electrode type solar cell 10 in which two types of electrodes having different polarities are provided on one surface of the substrate (silicon substrate 11), and the one surface of the insulating base material 21. It is a manufacturing method of the solar cell 1 provided with the wiring board 20 provided with the wiring corresponding to an electrode.
  • the base material bending step of bending the material 21 to the back electrode type solar cell side, the structure 30 is heated, and the first sealing material 2A and the second sealing material 2B are softened to form the back electrode type.
  • FIG. 5 shows a schematic cross-sectional view for explaining the cell placement step
  • FIG. 6 shows a schematic cross-sectional view for explaining the stacking step.
  • the cell placement process according to the present embodiment includes a back electrode type solar cell 10 having a configuration in which N electrodes 15 and P electrodes 16 having different polarities are alternately provided on one surface of a silicon substrate 11.
  • a wiring board 20 having a configuration in which N wirings 22 and P wirings 23 are alternately provided on an insulating base material 21 made of a resin film is bonded with, for example, adhesive SB at two locations on the diagonal line.
  • the adhesive SB may be arranged in the electrode non-formation region of the back electrode type solar battery cell 10, but since the space of the wiring non-formation region of the wiring substrate 20 is wide, considering productivity, It is preferable to arrange on the wiring board 20 side.
  • the back electrode solar cell 10 is placed on the wiring substrate 20 so that the wiring of the wiring substrate 20 and the electrode of the back electrode solar cell 10 face each other. Place.
  • the adhesive SB disposed in a part of the wiring non-formation region of the wiring substrate 20 is in contact with the electrode non-formation region of the back electrode solar cell 10, and the wiring substrate 20, the back electrode solar cell 10, Are bonded and temporarily fixed.
  • the translucent substrate 3 glass substrate
  • the sheet-like first sealing material 2A the wiring substrate 20 on which the back electrode type solar cells 10 are temporarily fixed
  • the sheet The structure 30 which laminated
  • this structure 30 is set in a laminator device. And the structure 30 is crimped
  • the gap is reduced so as to fill the gap between the back electrode type solar cell 10 and the wiring board 20. Further, the sealing materials 2A and 2B are softened and filled into the depression K. Further, the first sealing material 2A and the second sealing material 2B are integrated to form the sealing material 2 described above.
  • the base material bending step of bending the insulating base material 21 of the wiring board 20 to the back electrode type solar cell side, the structure 30 is heated, and the first sealing material 2A and the second sealing material are heated.
  • the sealing step of softening the material 2B and sealing the wiring substrate 20 on which the back electrode type solar cells 10 are arranged may be performed as a series of steps using the laminator device described above.
  • the substrate bending step and the sealing step may be performed independently of each other.
  • a method of evacuating or a method of applying pressure by air pressure while blowing hot air and heating is adopted.
  • a sealing process for evacuating while heating is employed, and thus the base material bending process can be performed using this sealing process.
  • the manufacturing process can be shortened, and the manufacturing is effective in terms of cost and process simplification. Preferred as a method.
  • the base material bending step and the sealing step can be carried out as a series of steps via a laminator device that performs a heating vacuum pressing step at a predetermined heating temperature and a predetermined vacuum pressure.
  • a laminator device that performs a heating vacuum pressing step at a predetermined heating temperature and a predetermined vacuum pressure.
  • the above-described base material bending step and sealing step can be performed continuously.
  • the structure 30 in which the back electrode type solar cell 10, the sealing material 2 (EVA), the translucent substrate 3, and the weather-resistant film 4 are integrally laminated is installed in a laminator device and evacuated while being evacuated. After holding at 7 ° C. for 7 minutes (vacuum pressure bonding step), by heating at 145 ° C. for 40 minutes (heat curing step), EVA is cured and the back electrode type solar cell 10 is pressure-bonded and sealed to produce solar cell 1. To do.
  • the adhesive (adhesive material) SB is applied to one cell (back electrode type solar battery cell 10) in a part of the wiring non-formation region of the wiring board in the vicinity of the outer periphery of the cell arrangement region.
  • the arrangement position of the adhesive (adhesive material) SB is not limited to such a configuration.
  • the adhesives are arranged in a plurality of spots in a plurality of places with respect to one side of the cell (two places for one side and a total of four places for one cell) SB1 to SB4 are adopted.
  • the adhesives SB5 and SB6 arranged in a line at two locations on opposite sides are employed.
  • the adhesive SB (SB1 to SB6) is disposed in a part of the wiring non-formation area of the wiring board 20 in the vicinity of the outer periphery of the cell arrangement area, and the wiring board 20 and the solar battery cell 10 are bonded together.
  • the same is true. That is, since it is not necessary to arrange an adhesive (including a pressure-sensitive adhesive) in the wiring formation region inside the substrate, the amount of the adhesive or the pressure-sensitive adhesive may be small.
  • Adhesives SB (SB1 to SB6) need only be installed at a plurality of locations in the vicinity of the outer peripheral portion of the cell arrangement region in the form of dots or lines.
  • the solar cell manufacturing method includes the flexible wiring board 20 and the solar battery cell 10 by arranging the adhesive SB in a part of the region other than the electrode and the wiring.
  • the solar cell 1 is manufactured through the steps as described above, and as shown in FIG. 9, an aluminum frame 40 is attached around the solar cell 1 and a terminal box 8 is attached to take out electricity to the outside.
  • the converted solar cell module M is completed.
  • the electricity generated by the solar cell module M can be taken out via the output cable 81.
  • moisture content to the solar cell 1 is effective by covering parts other than the glass substrate 3 with the laminated
  • the first means for solving the problems based on the present invention is a back electrode in which two types of electrodes (N electrode 15 and P electrode 16) having different polarities are provided on one surface of a substrate (silicon substrate 11).
  • a solar cell 1 including a solar cell 10 and a wiring substrate 20 provided with wirings (N wiring 22 and P wiring 23) corresponding to the electrodes on one surface of an insulating base material 21, and a back electrode type
  • the electrode of the solar battery cell 10 and the wiring of the wiring substrate 20 are electrically connected, and the insulating base material 21 is bent toward the back electrode solar battery cell 10 side, so that the back electrode solar battery cell 10 A recess K is formed between the electrodes adjacent to each other.
  • the effect of the first means is that the insulating base 21 is bent toward the back electrode type solar battery cell and forms a recess K between the electrodes adjacent to each other.
  • the amount of the adhesive used to fill the gap between the two can be reduced.
  • a second means for solving the problem based on the present invention is that the recessed portion of the insulating base 21 is in contact with the back electrode solar cell 10 between the electrodes of the back electrode solar cell 10 adjacent to each other. That is.
  • the effect of the second means is that the adjacent electrodes can be reliably insulated from each other, so that it is not necessary to use an adhesive to ensure insulation, and the amount of the adhesive used can be reduced.
  • a third means for solving the problem based on the present invention is that the recessed portions of the insulating base material 21 are in contact with the opposing side surfaces of the wirings adjacent to each other.
  • the effect of the third means can surely insulate adjacent wirings, and can fill a sealing material between adjacent wirings.
  • a fourth means for solving the problem based on the present invention is that the back electrode type solar cell 10 and the wiring substrate 20 are sealed using the sealing material 2, and the depression K is filled with the sealing material 2.
  • a sealing material exists between the wirings adjacent to each other on the wiring board 20 via the insulating base material 21.
  • the effect of the fourth means is that the connecting portion between the adjacent electrode and the wiring is reliably insulated via the sealing material filled in the depression K, and further, the solar cell 10 and the wiring substrate 20 are separated from each other. Misalignment can be reliably prevented.
  • a fifth means for solving the problems based on the present invention corresponds to the back electrode type solar cell 10 in which two kinds of electrodes having different polarities are provided on one surface of the substrate, and the electrode on one surface of the insulating base material 21.
  • a method of manufacturing a solar cell 1 comprising a wiring substrate 20 provided with wiring to be performed, wherein the back electrode on the wiring substrate is arranged so that the electrode of the back electrode solar cell 10 and the wiring of the wiring substrate 20 face each other.
  • the wiring substrate 20 is back contact solar cell 10 is disposed is to include a sealing step of sealing.
  • the effect of the fifth means is that it is not necessary to use an adhesive to ensure insulation between adjacent electrodes, so that the solar cells 10 and the wiring substrate 20 can be joined without using a large amount of adhesive.
  • the manufacturing method of the solar cell 1 can be obtained.
  • a sixth means for solving the problems based on the present invention uses a flexible film base material as an insulating base material, and the base material bending step evacuates the film base material into a back electrode type solar cell. That is, it is a evacuation process to bend to the cell side.
  • the effect of the sixth means is that the flexible film substrate can be evacuated and the substrate bending step can be easily performed.
  • a seventh means for solving the problems based on the present invention is that a base material bending step and a sealing step are performed through a series of heating and vacuum pressure bonding steps in which a laminator device is used and a predetermined heating temperature and a predetermined vacuum pressure are used. It is that it was set as the manufacturing method of the solar cell 1 performed as a process.
  • the effect of the seventh means is that the base material bending step and the sealing step can be carried out as a series of steps through a heating vacuum pressing step in which vacuum pressing is performed by heating to a predetermined temperature. Therefore, the manufacturing process can be shortened, and the manufacturing method is effective in terms of cost and process simplification.
  • the insulating base material of the wiring board interposed in the electrode surface of the back electrode type solar cell is bent toward the back electrode type solar cell side, and the back electrode type solar cell
  • the back electrode type solar cell By forming a recess between the electrodes adjacent to each other in the cell, a solar battery that can join the solar battery cell and the wiring board without using a large amount of adhesive and a method for manufacturing the solar battery can be obtained.
  • connection between the wiring of the wiring board and the electrode of the back electrode type solar battery cell can be made by direct contact without using a conductive adhesive.
  • the electrical resistance of the solar cell can be reduced, and the electrical characteristics of the solar cell can be improved.
  • the solar cell and the method thereof according to the present invention can join the solar cell and the wiring board without using a large amount of adhesive, the solar cell required to shorten the manufacturing process and reduce the cost, and its It can be suitably used for the manufacturing method.

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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
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  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne une cellule solaire (1) qui est équipée : d'une cellule solaire du type à électrodes arrière (10) comportant deux types d'électrodes (une électrode N (15) et une électrode P (16)) qui sont disposées sur une surface d'un substrat (un substrat de silicium (11)), lesdites électrodes ayant des polarités différentes ; et une carte de câblage (20), qui est pourvue d'un câblage (câblage N (22) et câblage P (23)) sur une surface d'un matériau de base isolant (21), ledit câblage correspondant auxdites électrodes. Les électrodes de la cellule solaire du type à électrodes arrière (10) et le câblage de la carte de câblage (20) sont connectés électriquement l'un à l'autre, et un creux (K) est formé entre les électrodes adjacentes de la cellule solaire du type à électrodes arrière (10), le matériau de base isolant (21) étant plié côté cellule solaire du type à électrodes arrière (10).
PCT/JP2013/077556 2012-12-07 2013-10-10 Cellule solaire et son procédé de fabrication WO2014087736A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201390000966.4U CN204885192U (zh) 2012-12-07 2013-10-10 太阳电池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-268174 2012-12-07
JP2012268174A JP6047389B2 (ja) 2012-12-07 2012-12-07 太陽電池およびその製造方法

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WO2014087736A1 true WO2014087736A1 (fr) 2014-06-12

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WO2017150104A1 (fr) * 2016-03-04 2017-09-08 シャープ株式会社 Élément de conversion photoélectrique et module de conversion photoélectrique

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JPH09148606A (ja) * 1995-11-29 1997-06-06 Sanyo Electric Co Ltd 折曲できるフィルム状の太陽電池素子
JP2009043842A (ja) * 2007-08-07 2009-02-26 Sharp Corp 太陽電池モジュール
JP2011159779A (ja) * 2010-02-01 2011-08-18 Hitachi Cable Ltd 太陽電池モジュール及び太陽電池モジュールの製造方法

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JP5123409B2 (ja) * 2011-03-30 2013-01-23 シャープ株式会社 配線基板付き太陽電池セルの製造方法および太陽電池モジュールの製造方法

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JPH09148606A (ja) * 1995-11-29 1997-06-06 Sanyo Electric Co Ltd 折曲できるフィルム状の太陽電池素子
JP2009043842A (ja) * 2007-08-07 2009-02-26 Sharp Corp 太陽電池モジュール
JP2011159779A (ja) * 2010-02-01 2011-08-18 Hitachi Cable Ltd 太陽電池モジュール及び太陽電池モジュールの製造方法

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