JP2014063575A - Solar cell, solar cell module, manufacturing method of solar cell and manufacturing method of solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell in which a plurality of solar cell power generation parts, manufactured continuously, can be easily connected in series or parallel in an arbitrary pattern.SOLUTION: A plurality of solar cell power generation parts, each including a first electrode and a second electrode, are arranged in one row or in matrix, so that the series connectable part forming position of the first electrode on one side of adjoining solar cell power generation parts overlaps the series connectable part forming position of the second electrode on the other side of adjoining solar cell power generation parts. A first substrate and a second substrate are bonded so that the parallel connectable part forming position of the first electrode of one side power generation part is located at a position not facing the other second electrode, and the parallel connectable part forming position of the second electrode of the other side power generation part is located at a position not facing the one first electrode. Electrolyte is injected into the internal space where the first and second electrodes are facing, and the series connectable part and parallel connectable part are provided, respectively, at the series connectable part forming position and parallel connectable part forming position.

Description

  The present invention relates to a solar cell, a solar cell module, a method for manufacturing a solar cell, and a method for manufacturing a solar cell module.

  Solar cells are attracting attention as a clean power source that can directly and immediately convert light energy into electric power and does not discharge pollutants such as carbon dioxide. Among them, the dye-sensitized solar cell is expected as a next-generation solar cell because it has high conversion efficiency, is manufactured by a relatively simple method, and the raw material unit price is low.

  The dye-sensitized solar cell includes a first electrode plate including a transparent conductive film formed on a substrate, a semiconductor layer stacked on the surface of the transparent conductive film, and a first conductive film formed with a counter conductive film. A two-electrode plate, an electrolyte injected between the semiconductor layer and the opposing conductive film, and provided between the first electrode plate and the second electrode plate so as to surround the semiconductor layer and seal the electrolyte And a sealing layer.

  However, since the dye-sensitized solar cell has a lower photoelectric conversion rate than a silicon-based solar cell, studies have been made to improve the photoelectric conversion efficiency by modularizing depending on the installation location and area. . In a module using such a dye-sensitized solar cell (hereinafter simply referred to as “solar cell module”), a plurality of power generation units are formed in a sheet-like base material in an arbitrary shape and arrangement, and these power generation units Are connected in series or in parallel according to a connection pattern designed in advance, so that an arbitrary output current / voltage can be obtained.

  For example, Patent Document 1 discloses that a plurality of strings are arranged in parallel in a direction orthogonal to the series connection direction on the same insulating substrate with a plurality of grooves extending in the series connection direction interposed therebetween. An integrated thin film solar cell connected in parallel is disclosed.

International Publication No. 2010/032713

  Recently, continuous production using a roll-to-roll method has been promoted for practical application of dye-sensitized solar cells. However, in the middle of producing a plurality of power generation units on a large-area substrate transported in one direction, if the electrode forming process, modularization process and insulation process for modularization are performed, the connection pattern of the power generation unit As the types increase or become more complicated, the design takes time and the manufacturing process becomes complicated. In other words, in the continuous production of dye-sensitized solar cells by the roll-to-roll method, the design freedom of series / parallel patterns of a plurality of solar cell power generation units is narrow from the viewpoint of productivity. There was a problem that small volume production became difficult.

  In order to solve the above-described problems, the present invention provides a solar cell capable of easily connecting a plurality of continuously produced solar cell power generation units in series / parallel in an arbitrary pattern, a manufacturing method thereof, and a desired connection. It is an object of the present invention to provide a solar cell module connected in series / parallel with a pattern and a method for manufacturing the same.

In the solar cell of the present invention, a plurality of solar cell power generation units each provided with a first electrode and a second electrode are arranged in a line or a matrix, and one of the adjacent solar cell power generation units is arranged on one side. The first electrode of the power generation unit is arranged so that the part where the first electrode can be connected in series and the part of the second power generation unit where the second electrode can be connected in series are overlapped with each other. The portion where the first electrode can be connected in parallel is disposed at a position not facing the other second electrode, and the portion where the second electrode of the power generation unit on the other side can be connected in parallel is the first first electrode. The first substrate and the second substrate are bonded to each other so as not to be opposed to one electrode, and an electrolyte solution is formed in an internal space formed by the first electrode and the second electrode facing each other. Is injected and the serially connectable part shape Location and each of said parallel connectable portion forming portion, parallel connectable portions connected in series can section, characterized in that the thus provided.
Moreover, the solar cell of this invention is equipped with the metal layer which can be melt | dissolved by laser irradiation in the serially connectable part of the said 1st and 2nd electrode, and the parallel connectable part of the said 1st and 2nd electrode. Preferably, the metal layer is made of one or more alloys of silver and nickel.
Furthermore, the solar cell module of the present invention is divided from the solar cell so as to include two or more solar cell power generation units, and the two or more solar cell power generation units are connected in a desired pattern. The serially connectable portion and the parallel connectable portion of each solar cell power generation unit of the divided solar cell are selectively connected.

The solar cell manufacturing method of the present invention includes a power generation unit forming step in which a plurality of solar cell power generation units each having a first electrode and a second electrode are arranged in a line or matrix, and the adjacent solar cell power generation units The first electrode of the power generation unit on one side and the second electrode of the power generation unit on the other side overlap with each other as a serially connectable part forming portion, and the first power generation unit of the one side not facing the other second electrode One electrode and the second electrode of the other power generation unit that does not face the one first electrode as parallel connectable portion forming locations, respectively, in the serial connectable portion forming location and the parallel connectable portion forming location, respectively. And a connectable part forming step of forming a serially connectable part and a parallel connectable part.
In the method for manufacturing a solar cell according to the present invention, the power generation unit forming step includes a step of forming a plurality of transparent conductive films as a first electrode on the first substrate in a line or a matrix, and the plurality of transparent portions. Forming a semiconductor layer on each of the conductive films; forming a plurality of opposing conductive films as a second electrode on the second substrate in a line or matrix; and the first substrate and the second substrate. It is preferable to include a step of pasting the first substrate and the second substrate, and a step of sealing after injecting an electrolytic solution into an internal space where the first substrate and the second substrate face each other.
In the method for manufacturing a solar cell according to the present invention, the connectable part forming step includes a step of forming a laser on the serially connectable part forming part and the parallel connectable part forming part of the first substrate and the second substrate. It is preferable to have a step of disposing a metal that can be melted by irradiation, and it is more preferable to use one or more alloys of silver and nickel as the metal.
Furthermore, the manufacturing method of the solar cell module of the present invention includes a solar cell dividing step of dividing the solar cell so as to include two or more solar cell power generation units from the solar cell manufactured by the solar cell manufacturing method, A connecting step of selectively connecting the series connectable portion and the parallel connectable portion of each solar cell power generation unit of the divided solar cells so that two or more solar cell power generation units are connected in a desired pattern. It is characterized by having.
Moreover, the manufacturing method of the solar cell module of the present invention includes a solar cell dividing step of dividing a solar cell so as to include two or more solar cell power generation units from the solar cell manufactured by the solar cell manufacturing method, Laser irradiation is selectively performed on the serially connectable portion and the parallel connectable portion of each solar cell power generation unit of the divided solar cells so that two or more solar cell power generation units are connected in a desired pattern. And a connecting step.

According to the solar cell and the solar cell manufacturing method of the present invention, the solar cell power generation unit includes a plurality of solar cell power generation units arranged in a line or matrix, and each solar cell power generation unit is adjacent to the solar cell power generation unit. There is provided a solar cell including both a serially connectable portion that enables serial connection between them and a parallel connectable portion that enables parallel connection. That is, a solar cell module precursor capable of connecting a plurality of solar cell power generation units in series or parallel in an arbitrary pattern is obtained.
In addition, according to the solar cell module and the solar cell module manufacturing method of the present invention, the serially connectable portion or the parallel connectable portion previously provided before the modularization is selectively connected in the adjacent solar cell power generation portion. Thereby, the several solar cell power generation part supplied continuously can be easily connected in series or in parallel with a desired connection pattern.

It is a top view which shows the solar cell which is 1st Embodiment of this invention. It is a figure which shows the solar cell which is 1st Embodiment of this invention, Comprising: (a) is sectional drawing corresponding to the case where an arrow is seen by the WW line in FIG. 1, (b) is X in FIG. FIG. 4 is a cross-sectional view corresponding to the case of viewing with an arrow X-ray, (c) is a cross-sectional view corresponding to the view of line Y-Y in FIG. 1, and FIG. It is sectional drawing corresponding to the case where an arrow is seen by a line. It is sectional drawing which shows the manufacturing method of the solar cell which is 1st Embodiment of this invention. It is sectional drawing which shows the manufacturing method of the solar cell which is 1st Embodiment of this invention. It is a perspective view which shows the manufacturing method of the solar cell which is 1st Embodiment of this invention. It is sectional drawing which shows the manufacturing method of the solar cell which is 1st Embodiment of this invention. It is a figure which shows the solar cell module which is 2nd Embodiment of this invention, Comprising: (a) is a top view, (b) is sectional drawing corresponding to the case where an arrow is taken in the EE line in (a). It is. It is a figure which shows the manufacturing method of the solar cell module which is 2nd Embodiment of this invention, Comprising: (a) is sectional drawing for demonstrating the process of laser-irradiating the serially connectable part of a solar cell, (b ) Is a cross-sectional view for explaining a process of forming a series connection portion in a solar cell. It is a figure which shows the solar cell module which is 3rd Embodiment of this invention, Comprising: (a) is a top view, (b) is sectional drawing corresponding to the case where an arrow is taken by the GG line in (a). (C) is a cross-sectional view corresponding to the case of viewing along the line HH in (a). It is a figure which shows the manufacturing method of the solar cell module which is 3rd Embodiment of this invention, Comprising: (a) is sectional drawing for demonstrating the process of laser-irradiating the parallel connection possible part of a solar cell, (b ) Is a cross-sectional view for explaining a process in which a parallel connection portion is formed in a solar cell. It is a top view which shows the solar cell module which is 4th Embodiment of this invention. It is a figure which shows the solar cell module which is 4th Embodiment of this invention, Comprising: (a) is sectional drawing corresponding to the case where it views on the GG line in FIG. 11, (b) is in FIG. It is sectional drawing corresponding to the case where an arrow is seen by a HH line, (c) is sectional drawing corresponding to the case where an arrow is seen by the II line in FIG. It is a figure which shows the solar cell which is 5th Embodiment of this invention, Comprising: (a) is a top view, (b) is sectional drawing corresponding to the case where it sees by the JJ line in (a). is there.

  Hereinafter, a solar cell, a solar cell module, and a manufacturing method thereof according to embodiments of the present invention will be described with reference to the drawings. The drawings used in the following description are schematic, and the length, width, thickness ratio, and the like are not necessarily the same as the actual ones, and can be changed as appropriate.

(First embodiment)
As shown in FIGS. 1 and 2, the solar cell 10 according to the first embodiment of the present invention is a film-type dye-sensitized solar cell using a resin material as a substrate, and includes a first substrate 21 and a plurality of dye-sensitized solar cells. A semiconductor electrode 24 including a transparent conductive film 22 and a semiconductor layer 23, a counter electrode 27 disposed opposite to the semiconductor electrode 24 and including a plurality of counter conductive films 25 and a second substrate 26, and the semiconductor electrode 24 and the counter electrode 27. The sealing material 29 which seals between, the electrolyte solution 30, the serially connectable part 41, and the parallel connectable parts 42 and 43 are provided.

  In the present embodiment, a film-type dye-sensitized solar cell will be described as an example of a solar cell that can be continuously produced. The solar cell 10 includes a plurality of solar cell power generation units C arranged in a row or in a matrix. The solar cell is not particularly limited.

  The first substrate 21 is a member serving as a base for the semiconductor electrode 24, and has an appropriate flexibility applicable to continuous production of solar cells by a roll-to-roll method or the like, and can be formed in a large area film shape. There is no particular limitation as long as it is a simple material. Examples of such a material include transparent resin materials such as polyethylene terephthalate (PET), acrylic, polycarbonate, polyethylene naphthalate (PEN), and polyimide.

  The transparent conductive film 22 constitutes a first electrode of the solar cell 10 and is formed in a line or a matrix on the first substrate 21 by a sputtering method or a printing method. The sizes and shapes of the plurality of transparent conductive films 22 in plan view may be aligned as long as they do not overlap each other and are provided with serially connectable portion forming locations 33 and parallel connectable portion forming locations 35 described later. Well, it does not have to be complete. For the transparent conductive film 22, tin oxide (ITO), zinc oxide, or the like is used.

The semiconductor layer 23 is laminated on the transparent conductive film 22 forming the solar cell power generation unit C, and constitutes the first electrode of the solar cell 10 together with the transparent conductive film 22. The semiconductor layer 23 is made of, for example, a metal oxide having a function of receiving and transporting electrons from a sensitizing dye. Examples of such metal oxides include titanium oxide (TiO ₂ ), zinc oxide (ZnO), and tin oxide (SnO ₂ ).

  The semiconductor layer 23 preferably carries a sensitizing dye. The sensitizing dye is composed of an organic dye or a metal complex dye. As the organic dye, for example, various organic dyes such as coumarin, polyene, cyanine, hemicyanine, and thiophene can be used. For example, a ruthenium complex is preferably used as the metal complex dye.

  The second substrate 26 is a member that becomes a substrate of the counter electrode 27, and is made of a transparent resin material or the like, like the first substrate 21.

  The counter conductive film 25 is a second electrode of the solar cell 10 and is formed in a line or matrix on the second substrate 26 by a sputtering method or a printing method. As shown in FIG. 2A, the opposing conductive film 25 is disposed so as to partially face the transparent conductive film 22 with a gap from the semiconductor electrode 24 in the thickness direction. The sizes and shapes of the plurality of opposing conductive films 25 in plan view do not overlap each other, can form the transparent conductive film 22 and the solar cell power generation unit C corresponding to each, and can be connected in series, which will be described later individually As long as the formation location 34 and the parallel connection possible portion formation location 36 are provided, they may or may not be aligned. For the counter conductive film 25, for example, ITO, platinum, polyaniline, polyethylenedioxythiophene (PEDOT), carbon, or the like is used.

  Between the transparent conductive film 22 and the counter conductive film 25, a separator 28 having a thickness that allows the transparent conductive film 22 and the counter conductive film 25 to be separated from each other may be provided. For the separator 28, a sheet material such as a nonwoven fabric having holes for holding the sealing material 29 and the electrolytic solution 30 is used. 1 and 2, the illustration of the separator 28 is omitted.

  The sealing material 29 is provided to surround the semiconductor layer 23 and form a solar cell power generation unit C including the transparent conductive film 22, the semiconductor layer 23, the counter conductive film 25, and an electrolytic solution 30 described later. That is, the sealing material 29 forms a gap between the transparent conductive film 22 and the semiconductor layer 23 and the counter conductive film 25, and also seals the solar cell power generation unit C to form the internal space S. The material of the sealing material 29 is temporarily fluidized, for example, an ultraviolet curable resin, a thermosetting resin, a resin containing an ultraviolet curable resin and a thermosetting resin, and is solidified by an appropriate treatment. A resin material or the like to be used is used.

  The electrolytic solution 30 is filled in the internal space S. For example, a liquid component such as acetonitrile, dimethylpropylimidazolium iodide, or butylmethylimidazolium iodide is added to a liquid component such as lithium iodide and iodine. And a liquid such as a solution (non-aqueous solvent such as propionitrile) in which is mixed. Moreover, the electrolyte solution 30 may contain t-butylpyridine which prevents a reverse electron transfer reaction.

  In the solar cell 10 of this embodiment, as shown in FIG.1 and FIG.2 (b), each transparent conductive film 22 is the opposition of any one solar cell power generation part C of the adjacent solar cell power generation part C. FIG. It arrange | positions so that it may overlap with a part of electrically conductive film 25 in planar view. Specifically, the longitudinal direction of the solar cell 10 is such that the transparent conductive film 22 overlaps a part of the counter conductive film 25 of any one of the solar cell power generation units C adjacent in a plan view. Are provided to extend partially. Thus, the transparent conductive film 22 in the portion where the transparent conductive film 22 and the opposing conductive film 25 of the adjacent solar cell power generation unit C overlap each other forms a serially connectable portion forming portion 33, and the overlapping conductive film 25 in the same overlapping portion. Constitutes a serially connectable portion forming portion 34.

  Moreover, as shown in FIG.1 and FIG.2 (c), each transparent conductive film 22 is arrange | positioned so that it may have a part which does not oppose any counter conductive film 25. FIG. Specifically, the transparent conductive film 22 is provided so as to extend in the width direction of the solar cell 10 more than the counter conductive film 25 in a plan view. The portion of the transparent conductive film 22 that does not face the counter conductive film 25 forms a portion 35 where a parallel connection is possible.

  Further, as shown in FIGS. 1 and 2D, each opposing conductive film 25 is disposed so as to have a portion that does not face any transparent conductive film 22. Specifically, the opposing conductive film 25 extends in the width direction of the solar cell 10 on the opposite side to the parallel connectable part forming portion 35 with respect to the solar battery power generation part C as compared to the transparent conductive film 22 in plan view. Is provided. The portion of the counter conductive film 25 that does not oppose the transparent conductive film 22 forms a parallel connectable portion forming portion 36.

  The serially connectable part 41 is arranged so that the serially connectable part forming part 33 of the transparent conductive film 22 and the serially connectable part forming part 34 of the opposing conductive film 25 of the adjacent solar cell power generation part C can be connected. Has been. That is, the serially connectable portion 41 functions as a series connection electrode for a solar cell module that allows the adjacent solar cell power generation portions C to be connected in series after the plurality of solar cell power generation portions C are formed. 1, 2, 5, 7, 8, 11, and 12 exemplify a serially connectable portion 41 including an upper portion 41 </ b> A (metal layer) and a lower portion 41 </ b> B (metal layer). However, the configuration and shape of the serially connectable part 41 are not particularly limited as long as the serially connectable part forming part 33 and the serially connectable part forming part 34 can be connected after the solar cell power generation part C is formed. For example, the serially connectable portion 41 may have any one of a rectangular shape, a circular shape, and a polygonal shape in plan view.

  As shown in FIG. 2B, the upper part 41A of the serially connectable part 41 overlaps with the serially connectable part forming part 34 of the opposing conductive film 25 in plan view, and the serially connectable part forming part 34 is formed. It is arranged on the surface of the second substrate 26 opposite to the surface on which it is located. The material of the upper portion 41A is not particularly limited as long as it is a conductive material that can be bonded to the corresponding lower portion 41B by being subjected to a treatment such as melting.

  The lower portion 41B of the serially connectable portion 41 overlaps the upper portion 41A in plan view, and is disposed on the surface of the transparent conductive film 22 at the serially connectable portion forming portion 33. The material of the lower portion 41B is not particularly limited as long as it is a conductive material that can be joined to the corresponding upper portion 41A.

  The parallel connectable portion 42 (metal layer) is arranged to enable connection between the parallel connectable portion forming portions 35 of the adjacent transparent conductive films 22. Further, the parallel connectable portion 43 (metal layer) is arranged to enable connection between the parallel connectable portion forming portion 36 of the adjacent opposing conductive film 25. In other words, the parallel connectable portions 42 and 43 function as parallel connection electrodes for solar cell modules that allow adjacent solar cell power generation portions C to be connected in parallel after a plurality of solar cell power generation portions C are formed. In this way, after the solar cell power generation unit C is formed, if the serially connectable unit formation point 33 and the serially connectable unit formation point 34 of the adjacent solar cell power generation unit C can be connected, the parallel connection unit 42, The configuration and shape of 43 are not particularly limited. The parallel connectable portions 42 and 43 may be any one of a rectangle, a circle, and a polygon, for example, in plan view.

  As shown in FIG. 2C, the parallel connectable portion 42 of the second substrate 26 extends across the parallel connectable portion forming portion 35 of the transparent conductive film 22 of the adjacent solar cell power generation portion C in plan view. The counter conductive film 25 is disposed on the surface where it is not formed.

  As shown in FIG. 2D, the parallel connectable portion 43 of the second substrate 26 extends across the parallel connectable portion forming portion 36 of the opposing conductive film 25 of the adjacent solar cell power generation portion C in plan view. The counter conductive film 25 is disposed on the surface where it is not formed.

  The parallel connectable portion 42 is disposed on the surface opposite to the surface on which the transparent conductive film 22 is formed of the first substrate 21 at a position overlapping the position shown in FIG. However, as shown in FIGS. 2B to 2D, the upper portion 41 </ b> A of the serially connectable portion 41 and the parallel connectable portions 42 and 43 are formed on the same surface of the solar cell 10, i.e., on the first substrate 21. It is preferable that all of them are arranged on either the exposed surface or the exposed surface of the second substrate 26. Thereby, the connection between the upper part 41A and the lower part 41B of the serially connectable part 41, the connection between the adjacent parallel connectable part forming places 35 by the parallel connectable part 42, and the adjacent parallel by the parallel connectable part 43 Since the connection between the connectable part forming locations 36 can be performed with respect to the solar cell 10 from one direction, the efficiency of continuous production of the solar cell 10 is increased.

  When the upper part 41A and the lower part 41B of the series connectable part 41 and the parallel connectable parts 42 and 43 are made conductive by laser irradiation after the formation of the solar cell power generation part C, respectively, the upper part 41A and the lower part 41B As the material of the connectable portions 42 and 43, a metal that can be melted by laser irradiation is used. As the metal, for example, silver, nickel or the like is used.

Next, a method for manufacturing the solar cell 10 of the present embodiment will be described.
The manufacturing method of the solar cell 10 includes at least a power generation part forming step and a connectable part forming step. Hereinafter, each step will be described. The procedure described below, the materials used, and the like are examples of the manufacturing process of the dye-sensitized solar cell of the present embodiment, and are not limited to this example, as long as a solar cell capable of continuous production can be manufactured. .

<Semiconductor electrode manufacturing process (power generation part forming process)>
First, as shown in FIG. 3, a plurality of transparent layers are formed by sputtering ITO, FTO, or the like on the upper surface of a sheet-like first substrate 21 that is made of a PEN film, a PET film, or the like and is continuously supplied by a roll or the like. A conductive film 22 is formed. At this time, the transparent conductive film 22 has a pattern in which the counter conductive film 25 to be formed later is partly opposed to each other in a plan view and the series connectable portion forming portion 33 and the parallel connectable portion forming portion 35 can be partitioned. And are arranged in a single row or matrix.

Next, the semiconductor layer 23 is formed on the surface of the transparent conductive film 22 other than the serially connectable portion forming portion 33 and the parallel connectable portion forming portion 35. The semiconductor layer 23 can be formed by, for example, a low temperature baking method or an aerosol deposition method (hereinafter referred to as an AD method). The low-temperature firing method is a method in which a paste containing TiO ₂ or the like that can be fired is applied on the transparent conductive film 22 by a mask or a printing method, and heat treatment is performed at a temperature at which the solvent of the TiO ₂ -containing paste volatilizes. The AD method is a film forming method in which the material of the semiconductor layer 23 is formed into particles and then sprayed onto the transparent conductive film 22 at the speed of sound. In the AD method, for example, since semiconductor materials having different particle diameters are injected onto the transparent conductive film 22, a high-quality porous film is formed. In the process of forming the semiconductor layer 23, conditions may be set as appropriate in consideration of the material, thickness, and the like of the semiconductor layer 23.

  After the semiconductor layer 23 is formed, the semiconductor layer 23 is immersed in a sensitizing dye solution in which a sensitizing dye is dissolved in a solvent, and the sensitizing dye is supported on the semiconductor layer 23. The method for supporting the sensitizing dye on the semiconductor layer 23 is not particularly limited. However, in the method for manufacturing the solar cell 10, a method in which the semiconductor layer 23 is continuously charged, immersed, and pulled up while the semiconductor layer 23 is moved into the sensitizing dye solution. It is preferable to use it.

<First process for forming serially connectable part (process for forming connectable part)>
Next, the lower part 41 </ b> B of the serially connectable part 41 is formed at the serially connectable part forming portion 33 of the transparent conductive film 22. The lower part 41B is joined to the upper part 41A of the serially connectable part 41 to be formed later by a process such as melting, and the solar cell power generation including the serially connectable part forming part 33 of the transparent conductive film 22 and the transparent conductive film 22 The material which can conduct | electrically_connect with the serially connectable part formation location 34 of any one opposing electrically conductive film 25 among the solar cell electric power generation parts C adjacent to the part C is used. In the manufacturing method of the solar cell 10, assuming that the upper part 41 </ b> A and the lower part 41 </ b> B are electrically connected by laser irradiation in later modularization of the solar cell 10, a metal that can be melted by laser irradiation is used for the lower part 41 </ b> B. . As such a metal, it is preferable to use, for example, silver, nickel, or an alloy thereof from the viewpoint of having a high conductivity and a relatively low melting point. The laser used for laser irradiation may be a CO ₂ laser, a YAG laser, a YVO ₄ laser, or the like, but is not particularly limited. In addition, the lower part 41B may be formed in the whole serial connection part formation location 33, and may be formed in the one part area | region. The shape of the lower portion 41B is not particularly limited as long as it can be joined to the upper portion 41A.

  Through the above steps, a sheet-like semiconductor electrode 24 is obtained in which a plurality of transparent conductive films 22, a semiconductor layer 23, and a lower portion 41B of the serially connectable portion 41 are laminated on the first substrate 21.

<Counter electrode manufacturing process (power generation part forming process)>
Next, as shown in FIG. 4, a plurality of layers are formed by sputtering ITO, FTO, or the like on the upper surface of the sheet-like second substrate 26 that is made of a PEN film, a PET film, and the like and is continuously supplied by a roll or the like. A counter conductive film 25 is formed. At this time, the opposing conductive film 25 is partially aligned with the transparent conductive film 22 in a plan view, and is arranged in a row or in a pattern that can partition the serially connectable portion forming portion 34 and the parallel connectable portion forming portion 36. It is formed so as to be arranged in a matrix.

  Through the above process, a sheet-like counter electrode 27 in which a plurality of opposing conductive films 25 are provided on the second substrate 26 is obtained. In addition, you may implement a counter electrode manufacturing process in parallel with a semiconductor electrode manufacturing process and a serial connection possible part formation 1st process. Thereby, the manufacturing time of the solar cell 10 can be shortened, and productivity can be improved.

<Solar cell power generation part production process (power generation part formation process)>
Next, a sealing material 29 is provided on the transparent conductive film 22 of the first substrate 21 so as to surround the semiconductor layer 23 along the outer periphery of the transparent conductive film 22, and the second along the outer periphery of the counter conductive film 25. A sealing material 29 is provided on the counter conductive film 25 of the substrate 26. In this step, when the transparent conductive film 22 and the counter conductive film 25 are bonded together in the next step, there is a predetermined gap between the transparent conductive film 22 and the counter conductive film 25, and the transparent power generation unit C is transparent. A separator 28 having an appropriate thickness is disposed so that an internal space S is formed in which the conductive film 22 and the counter conductive film 25 face each other. The separator 28 may be a mixture of a sealing resin and a spacer, or a film-like material may be disposed as shown in FIG. In addition, in order to inject the electrolytic solution 30 into the internal space S in a later step, a liquid injection part (not shown) that connects the internal space S and the periphery of the first substrate 21 and the second substrate 26 is provided.

  Next, a separator 28 is disposed between the transparent conductive film 22 and the counter conductive film 25 to align the semiconductor electrode 24 and the counter electrode 27. As shown in FIG. 5, this alignment refers to the serially connectable portion forming portion 33 of the transparent conductive film 22 constituting the solar cell power generation portion C on one side of the adjacent solar cell power generation portions C, and the other side. The serially connectable portion forming portion 34 of the counter conductive film 25 constituting the solar cell power generation unit C overlaps in plan view, and the parallel connectable portion forming portion 35 of the transparent conductive film 22 faces any counter conductive film 25. In addition, the relative positions of the transparent conductive film 22 and the counter conductive film 25 in a plan view are shifted so that the parallel-connectable portion forming portion 36 of the counter conductive film 25 does not oppose any transparent conductive film 22. . The separator 28 is made of a material having a large number of holes for allowing the molten sealing material 29 and the electrolyte 30 to pass therethrough. In FIG. 5, the illustration of the separator 28 and the sealing material 29 is omitted.

  Next, as shown in FIG. 6, the separator 28 is sandwiched between the sealing material 29 provided on the semiconductor electrode 24 and the sealing material 29 provided on the counter electrode 27, and hot pressing is performed. By this hot press, the sealing material 29 is melted to infiltrate the sealing material 29 into the holes of the separator 28, and the sealing material 29 and the separator 28 are fused to fix the separator 28.

  Subsequently, the electrolytic solution 30 is injected into the internal space S from a previously formed liquid injection part, and the injection port is sealed. As a result, a structure is obtained in which a plurality of solar cell power generation units C each including the semiconductor electrode 24 and the counter electrode 27 are arranged in a line or matrix.

<Second step for forming serially connectable portion (process for forming connectable portion)>
Next, on the surface of the second substrate 26 opposite to the surface on which the opposing conductive film 25 is formed, the serially connectable portion is overlapped with the serially connectable portion forming portion 34 of the opposing conductive film 25 in a plan view. An upper portion 41A of 41 is formed. Similar to the lower part 41B, the upper part 41A is joined to the lower part 41B by a process such as melting, and the series connection possible part forming part 34 of the opposing conductive film 25 and the solar cell power generation part C including the opposing conductive film 25 are connected. The material which can conduct | electrically_connect with the serially connectable part formation location 33 of any one transparent conductive film 22 among the adjacent solar cell power generation parts C is used.

<Parallel connectable part forming process (connectable part forming process)>
Next, the parallel connectable portion 42 is located on the exposed surface of the second substrate 26 at a position straddling between the parallel connectable portion forming locations 35 of the transparent conductive film 22 of the adjacent solar cell power generation portion C in plan view. Form. Similarly, the parallel connectable portion 43 is formed on the exposed surface of the second substrate 26 at a position across the parallel connectable portion forming locations 36 of the opposing conductive film 25 of the adjacent solar cell power generation portion C in plan view. To do. For the parallel connectable portions 42 and 43, a material that enables conduction between the parallel connectable portion forming locations 35 and between the parallel connectable portion forming locations 36 of adjacent solar cell power generation units C by a process such as melting is used. .

  In the manufacturing method of the solar cell 10, the upper part 41 </ b> A and the lower part 41 </ b> B of the serially connectable part 41, the adjacent parallel connectable part forming points 35, and the adjacent parallel connection are possible by laser irradiation in the modularization of the solar battery 10 later Assuming that the portion forming portions 36 are electrically connected to each other, a metal that can be melted by laser irradiation is used for the upper portion 41A, the lower portion 41B, and the parallel connectable portions 42 and 43. Note that the upper portion 41A, the lower portion 41B, and the parallel connectable portions 42 and 43 may be formed on the entire connectable portion forming portion in a plan view, or may be formed on a part thereof. Further, these shapes are not particularly limited as long as the upper part 41A and the lower part 41B, the adjacent parallel connectable part forming places 35, and the adjacent parallel connectable part forming places 36 can be connected.

  When the upper part 41A and the lower part 41B of the serially connectable part 41 are made conductive by laser irradiation as described above, the upper part 41A is thicker than the lower part 41B in consideration of the distance between the semiconductor electrode 24 and the counter electrode 27, or It is preferable to form with a wide area. Thereby, even if the upper part 41A is melted by laser irradiation and the melted material of the upper part 41A flows out so as to be joined to the lower part 41B, there is no possibility that the upper part 41A of the second substrate 26 shape is lost.

  Through the above steps, the solar cell 10 including the semiconductor electrode 24, the counter electrode 27, the sealing material 29, the electrolytic solution 30, the serially connectable portion 41, and the parallel connectable portions 42 and 43 is completed. In addition, you may implement each process demonstrated above, changing order as needed for the efficiency improvement of the continuous production of the solar cell 10 as needed.

  As described above, the solar cell 10 of the present embodiment has a plurality of solar cell power generation units C arranged in a row or matrix, and is adjacent to each solar cell power generation unit C. Are provided with both a serially connectable portion 41 that enables serial connection and parallel connectable portions 42 and 43 that allow parallel connection. That is, according to the solar cell 10 of this embodiment, after forming a plurality of solar cell power generation units C, a precursor of a solar cell module that can connect these solar cell power generation units C in series / parallel in an arbitrary pattern Is provided.

  Moreover, according to the manufacturing method of the solar cell 10 of this embodiment, the large-area solar cell 10 can be easily and continuously produced by a roll-to-roll method or the like. In addition, since it is not necessary to determine the series / parallel pattern of the plurality of solar cell power generation units C before or during the formation of the solar cell power generation unit C, the series / The design flexibility of the parallel pattern is greatly expanded, and continuous and small-scale production of solar cells for solar cell modules is facilitated.

(Second Embodiment)
Next, the solar cell module according to the second embodiment of the present invention will be described. In addition, in the component of the solar cell module 11 of this embodiment shown in FIG. 7, the same code | symbol is attached | subjected about the component same as the component of the solar cell 10 of 1st Embodiment shown in FIGS. The description is omitted.

  As shown in FIG. 7A, the solar cell module 11 is obtained by replacing the serially connectable portion 41 among the constituent elements of the solar cell 10 with a serial connection portion 51. That is, the solar cell module 11 is a connection body of the solar cell power generation unit C obtained by joining the upper portion 41A and the lower portion 41B in each serially connectable portion 41 of the solar cell 10.

  As shown in FIG. 7 (b), the series connection unit 51 includes a lower part 41B of the series connectable unit 41 of one of the solar cell power generation units C and an adjacent solar cell power generation unit. The upper part 41A of any serially connectable part 41 of C is made conductive through a conductive material or the like. Thereby, the transparent conductive film 22 of each solar cell power generation part C and any one opposing conductive film 25 among the solar cell power generation parts C adjacent to each solar cell power generation part C are connected in series.

  In the solar cell module 11 of this embodiment, the upper part 41A and the lower part 41B in the serially connectable part 41 are joined by laser irradiation. That is, in the serial connection unit 51, the upper part 41A of the serially connectable part 41 is irradiated with laser, the laser irradiation part of the upper part 41A is melted, and the molten upper part 41A is sealed with the second substrate 26, the counter conductive film 25, and the sealing. The material 29 is penetrated and joined to the lower portion 41B so as to be integrated.

Then, the manufacturing method of the solar cell module 11 of this embodiment is demonstrated.
The manufacturing method of the solar cell module 11 includes a solar cell dividing step and a connecting step. Hereinafter, each step will be described.

<Solar cell splitting process>
First, the solar cell 10 is prepared, the area of the solar cell module 11 is taken into consideration, and the solar cell 10 is divided so as to include two or more solar cell power generation units as necessary. In the present embodiment, the solar cell 10 continuously supplied by a roll-to-roll method or the like is divided into solar cells having an arbitrary shape while being conveyed. Note that this step can be omitted when the sheet-like solar cell 10 is modularized without being divided.

<Connection process>
Next, the upper portion 41A of the serially connectable portion 41 in the divided solar cell or solar cell 10 and the corresponding lower portion 41B are joined. In the manufacturing method of the solar cell module 11, as shown in FIG. 8A, laser irradiation is performed on the center of the upper portion 41 </ b> A of each serially connectable portion 41. Thereby, the central portion of the upper portion 41A is melted. As shown in FIG. 8B, the melted upper portion 41C penetrates the second substrate 26, the opposing conductive film 25, and the sealing material 29 and is joined to the lower portion 41B. By this step, the series connection portion 51 in which the upper portions 41A and 41C and the lower portion 41B are integrated is formed. Conditions for laser irradiation to the upper portion 41A may be set as appropriate in consideration of the material of the upper portion 41A and the lower portion 41B, the thickness of the solar cell 10, and the like.

  Through the above steps, the solar cell module 11 in which a plurality of solar cell power generation units C are connected in series is completed. FIG. 7 illustrates a part of the solar cell module 11 in which the solar cell power generation units C formed in a line in the longitudinal direction of the solar cell 10 are connected in series. The number and arrangement of the parts C are not particularly limited.

  As described above, according to the solar cell module 11 of the present embodiment and the manufacturing method thereof, the serially connectable portions of the solar cells 10 formed in advance before modularization by a method suitable for continuous production such as laser irradiation. 41 is connected, and the solar cell module 11 in which a plurality of solar cell power generation units C are connected in series can be easily realized.

(Third embodiment)
Next, a solar cell module according to a third embodiment of the present invention will be described. In addition, in the component of the solar cell module 12 of this embodiment shown in FIG. 9, the same code | symbol is attached | subjected about the component same as the component of the solar cell 10 of 1st Embodiment shown in FIGS. The description is omitted.

  As shown in FIG. 9A, the solar cell module 12 is obtained by replacing the parallel connectable portions 42 and 43 among the constituent elements of the solar cell 10 with parallel connection portions 52 and 53, respectively. That is, in the solar cell module 12, in the individual parallel connectable portions 42 and 43 of the solar cell 10, the transparent conductive film 22 of the parallel connectable portion forming portion 35 and the opposite conductive property of the parallel connectable portion forming portion 36 that overlap in plan view. It is the connection body of the solar cell power generation part C obtained by joining the film | membrane 25, respectively.

  As shown in FIG. 9B, the parallel connection portion 52 includes a plurality of solar cell power generation units C that can be connected in parallel 42 and a plurality of parallel connection possible portions that overlap the respective parallel connection possible portions 42 in plan view. The transparent conductive film 22 of the formation location 35 is made conductive through a conductive material or the like. Thereby, the transparent conductive film 22 of each solar cell power generation part C and the transparent conductive film 22 of the adjacent solar cell power generation part C are connected in parallel.

  As shown in FIG. 9C, the parallel connection portion 53 includes a plurality of parallel connectable portions 43 of the plurality of solar cell power generation units C and a plurality of parallel connectable portions overlapping each parallel connectable portion 43 in plan view. The opposite conductive film 25 at the formation location 36 is made conductive through a conductive material or the like. Thereby, the opposing conductive film 25 of each solar cell power generation part C and the opposing conductive film 25 of the adjacent solar cell power generation part C are connected in parallel.

  In the solar cell module 12 of the present embodiment, the parallel connection portion 52 includes the transparent conductive film 22 in one parallel connectable portion forming portion 35 of the solar cell power generation portions C adjacent to the parallel connectable portion 42 in plan view. The overlapping portion and the portion where the transparent conductive film 22 of the same parallel connectable portion 42 and the other parallel connectable portion forming portion 35 overlap are individually irradiated with laser, and the laser irradiated portion of the parallel connectable portion 42 is melted. The second substrate 26 and the sealing material 29 are penetrated and joined to each transparent conductive film 22 to be integrated. The parallel connection portion 53 is obtained by replacing the parallel connectable portion forming portion 35 and the transparent conductive film 22 with the parallel connectable portion forming portion 36 and the counter conductive film 25 in the above description of the parallel connection portion 52. .

Then, the manufacturing method of the solar cell module 12 of this embodiment is demonstrated.
Similar to the method for manufacturing the solar cell module 11, the method for manufacturing the solar cell module 12 includes a solar cell dividing step and a connecting step. Hereinafter, each step will be described.

  Since the solar cell dividing step in the method for manufacturing the solar cell module 12 is the same as the solar cell dividing step in the method for manufacturing the solar cell module 11, the description thereof is omitted.

<Connection process>
Next, it is possible to connect the transparent conductive film 22 of the adjacent solar cell power generation unit C in parallel with the parallel connectable unit 42 which is the same as each parallel connectable unit 42 in the divided solar cell or solar cell 10 in plan view. The part formation location 35 is joined. Moreover, the parallel connection possible part 43 which overlaps with the parallel connection possible part 43 same as each parallel connection possible part 43 by planar view, and the parallel connection possible part formation location 35 of the opposing electrically conductive film 25 of the adjacent solar cell power generation part C is joined.

  In the method for manufacturing the solar cell module 12, as shown in FIG. 10A, each parallel connectable portion 42 overlaps with each parallel connectable portion 42 in a plan view, and adjacent transparent conductive films 22 are parallel. Laser irradiation is performed on at least two locations corresponding to the connectable portion forming locations 35. Thereby, the laser irradiation part of the parallel connectable part 42 is melted. As shown in FIG. 10B, the two melting portions 42 </ b> C penetrate the second substrate 26 and the sealing material 29, and are respectively joined to the parallel connectable portion forming locations 35 of the adjacent transparent conductive films 22. By this step, the parallel connection portion 52 is formed. The conditions for laser irradiation on the parallel connectable portion 42 may be set as appropriate in consideration of the material of the parallel connectable portion 42, the thickness of the solar cell 10, and the like.

  Similarly, in each parallel connectable portion 43, laser irradiation is performed on at least two locations corresponding to the parallel connectable portion forming locations 36 of the adjacent conductive film 25 that overlap each parallel connectable portion 43 in plan view. I do. As a result, the laser irradiated portion of the parallel connectable portion 43 is melted. The two melted portions 43 </ b> C (not shown) irradiated with the laser penetrate the second substrate 26 and are respectively joined to the parallel connectable portion forming locations 36 of the adjacent conductive film 25. The parallel connection part 53 is formed by this process. Conditions for laser irradiation to the parallel connectable portion 43 may be appropriately set in consideration of the material of the parallel connectable portion 43, the thickness of the solar cell 10 and the like, and the laser irradiation region in the thickness direction of the solar cell is connected in parallel. It may be shallower than when the portion 52 is formed.

  Through the above steps, the solar cell module 12 in which a plurality of solar cell power generation units C are connected in parallel is completed. FIG. 9 illustrates a part of the solar cell module 12 in which the solar cell power generation units C formed in a row in the longitudinal direction of the solar cell 10 are connected in parallel. The number and arrangement of the parts C are not particularly limited.

  As described above, according to the solar cell module 12 and the manufacturing method thereof of the present embodiment, the parallel connectable portion of the solar cell 10 formed in advance before modularization by a method suitable for continuous production such as laser irradiation. 42 and 43 can be connected and the solar cell module 12 by which the several solar cell power generation part C is connected in parallel is easily realizable.

(Fourth embodiment)
Next, a solar cell module according to a fourth embodiment of the present invention will be described. In addition, in the component of the solar cell module 13 of this embodiment shown in FIG.11 and FIG.12, about the component same as the component of the solar cell 10 of 1st Embodiment shown in FIGS. The description is omitted.

As shown in FIG. 11, the solar cell module 13 is a solar cell divided so as to include two or more solar cell power generation units C among the solar cells 10 or a plurality of solar cell power generation units C of the solar cell 10. Two or more solar cell power generation units C are selectively connected in series or in parallel. 11 and 12, among the _four solar cell power generation units C _{1 to} C ₄ , the solar cell power generation unit C ₁ and the solar cell power generation unit C ₂ , and the solar cell power generation unit C ₃ and the solar cell power generation unit C. ₄ illustrates a 2 series × 2 parallel solar cell module in which ₄ is connected in parallel, and a solar cell power generation unit C ₂ and a solar cell power generation unit C ₃ are connected in series. In the solar cell module 13, the number of solar cell power generation units C connected in series and the number of solar cell power generation units C connected in parallel are not particularly limited.

In the solar cell module 13, between the solar cell power generation portion C ₁ and the solar cell power generation portion C _2, and a parallel connection unit connected in parallel respectively between the solar cell power generation portion C ₃ and the solar cell power generation portion C ₄ 52 , 53 are the same as the parallel connection parts 52, 53 of the solar cell module 12 of the third embodiment, and thus the description thereof is omitted. Further, since the space between the solar cell power generation portion C ₂ and the solar cell power generation portion C ₃ configuration of the series-connected portion 51 to be connected in series is the same as the series connection unit 51 of the solar cell module 11 of the second embodiment, The description is omitted.

Then, the manufacturing method of the solar cell module 13 of this embodiment is demonstrated.
The manufacturing method of the solar cell module 13 includes a solar cell dividing step and a connecting step, similarly to the manufacturing method of the solar cell modules 11 and 12. Hereinafter, each step will be described.

  Since the solar cell dividing step in the method for manufacturing the solar cell module 13 is the same as the solar cell dividing step in the method for manufacturing the solar cell modules 11 and 12, the description thereof is omitted.

<Connection process>
Next, in the divided solar cell or solar cell 10, the solar cell power generation unit C ₁ and the solar cell power generation are connected so that the _four solar cell power generation units C _{1 to} C ₄ are connected in a 2 series × 2 parallel connection pattern. parallel connectable portions 42, 43 between the parts _{C 2} and, respectively, parallel connectable portions 42, 43 between the solar cell power generation portion _{C 3} and the solar cell power generation portion _{C 4,} thereby turning the laser irradiation. Since the connection process of these parallel connection possible parts 42 and 43 is the same as the connection process in the manufacturing method of the solar cell module 12 of 3rd Embodiment, the description is abbreviate | omitted.

Subsequently, to conduct a series connectable portion 41 between the solar cell power generation portion C ₂ and the solar cell power generation portion C _3. Since the connection process of this serial connection possible part 41 is the same as the connection process in the manufacturing method of the solar cell module 11 of 2nd Embodiment, the description is abbreviate | omitted. Incidentally, during the present process is a parallel connectable portions 42, 43, and, a solar cell power generation portion C ₃ and the solar cell power generation portion C ₄ between the solar cell power generation portion C ₁ and the solar cell power generation portion C ₂ of the You may carry out in parallel with the connection of the parallel connection possible parts 42 and 43.

Through the above steps, the solar cell module 13 in which a plurality of solar cell power generation units C are connected in series and in parallel is completed.
As described above, according to the solar cell module 13 and the manufacturing method thereof of the present embodiment, two or more solar cell power generation units C are connected in a desired pattern by a method suitable for continuous production such as laser irradiation. As described above, laser irradiation is selectively performed on the serially connectable portion 41 and the parallel connectable portions 42 and 43 of the solar cell 10 formed in advance before modularization, and the serially connectable portion 41 and the parallel connection are performed. The possible parts 42 and 43 can be made conductive. Therefore, a plurality of continuously supplied solar cell power generation units C can be easily connected in series or in parallel with a desired pattern after the solar cell power generation units C are formed.

(Fifth embodiment)
Next, a solar cell according to a fifth embodiment of the present invention will be described. In addition, in the component of the solar cell 14 of this embodiment shown in FIG. 13, about the component same as the component of the solar cell 10 of 1st Embodiment shown in FIGS. 1-6, the same code | symbol is attached | subjected, The description is omitted.

  As shown in FIG. 13, the solar cell 14 is obtained by replacing the serially connectable portion 41 among the constituent elements of the solar cell 10 with a serially connectable portion 45. The same components as those of the battery 10 are provided. That is, the solar cell 14 is obtained by changing the shape and arrangement of the serially connectable portion 41 in a plan view in the solar cell 10. Further, the plan view shapes of the transparent conductive film 22 and the counter conductive film 25 are changed with the change in the arrangement of the serially connectable portions 41.

  As shown in FIG. 13 (b), in the solar cell 14, the serially connectable portion forming portion 33 of the transparent conductive film 22 and the serially connectable portion forming portion 34 of the opposing conductive film 25 are adjacent to the adjacent solar cell 14. It arrange | positions in the area | region pinched | interposed into each solar cell power generation part C. FIG. Further, the serially connectable portion 45 is provided in an elongated pattern in a direction orthogonal to the longitudinal direction of the solar cell 14 in plan view. The arrows shown in the direction from each solar cell power generation unit C to the series connectable unit 45 in FIG. 13A indicate the flow of current during power generation, and the area of the series connectable unit 45 increases. As a result, the resistance loss in the solar cell power generation section C becomes smaller.

  Since the manufacturing method of the solar cell 14 is the same as the manufacturing method of the solar cell 10, the detailed description is abbreviate | omitted. In addition, in the semiconductor electrode manufacturing process in the manufacturing method of the solar cell 14, the plurality of transparent conductive films 22 are formed in a planar view shape and arrangement that match the planar view shape and arrangement of the series connectable portion 45, and in the counter electrode manufacturing process, The opposing conductive film 25 is formed in a planar shape and arrangement that matches the planar shape and arrangement of the serially connectable portion 45. Further, in the solar cell power generation part manufacturing step, the shape and arrangement in plan view of the serially connectable part 45, the serially connectable part forming part 33 of the transparent conductive film 22, and the serially connectable part forming part 34 of the opposing conductive film 25 are used. Perform alignment.

  As described above, according to the solar cell 14 and the manufacturing method thereof of the present embodiment, the resistance loss of the solar cell power generation unit C can be reduced by increasing the area of the serially connectable portion 45 in plan view. Thereby, compared with the solar cell 10 for low illuminance, a solar cell for high illuminance can be provided.

  Moreover, according to this invention, the characteristic of a solar cell and a solar cell module can be easily adjusted by changing the shape and arrangement | positioning of a serially connectable part and a parallel connectable part.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications are possible within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  The production of the solar cell of the present invention described above and the production of a solar cell module using the solar cell obtained thereby may be performed continuously or intermittently. When performing intermittently, for example, the produced sheet-like solar cell is wound up and temporarily stored, and the sheet-like solar cell can be divided into modules as necessary.

  The present invention can be used in the field of solar cells.

  DESCRIPTION OF SYMBOLS 10,14 ... Solar cell, 22 ... Transparent conductive film (1st electrode), 23 ... Semiconductor film (1st electrode), 25 ... Opposite conductive film (2nd electrode), 41 ... Series connection possible part, 42, 43 ... Parallel connectable part, C ... Solar power generation part

Claims (10)

A plurality of solar cell power generation units each provided with a first electrode and a second electrode are arranged in a row or matrix,
Of the adjacent solar cell power generation units, the portion where the first electrode of the power generation unit on one side can be connected in series with the portion where the second electrode of the power generation unit on the other side can be connected in series overlaps with each other. And the second electrode of the power generation unit on the other side is disposed at a position where the portion where the first electrode of the power generation unit on the one side can be connected in parallel is not opposed to the other second electrode. The first substrate and the second substrate are bonded to each other so that the parallel-connectable portion forming portion is disposed at a position not facing the one first electrode,
An electrolyte is injected into an internal space formed by the first electrode and the second electrode facing each other.
A solar cell in which a serially connectable part and a parallel connectable part are provided in the serially connectable part forming part and the parallel connectable part forming part, respectively.   The metal layer which can be melt | dissolved by laser irradiation is provided in the said serially connectable part of the said 1st and 2nd electrode, and the said parallel connectable part of the said 1st and 2nd electrode. Solar cells.   The solar cell according to claim 1, wherein the metal layer is made of one or more alloys of silver and nickel. It is divided | segmented so that two or more solar cell power generation parts may be included from the solar cell of any one of Claims 1-3,
The series connectable part and the parallel connectable part of each solar battery power generation part of the divided solar battery are selectively connected so that the two or more solar battery power generation parts are connected in a desired pattern. Solar cell module. A power generation unit forming step of arranging a plurality of solar cell power generation units each having a first electrode and a second electrode in a row or matrix;
Among the adjacent solar cell power generation units, the overlapping part of the first electrode of the power generation unit on one side and the second electrode of the power generation unit on the other side is set as a serially connectable part formation location,
The first electrode of the one power generation unit that does not face the other second electrode and the second electrode of the other power generation unit that does not face the one first electrode, can be connected in parallel.
A connectable part forming step of forming a serially connectable part and a parallel connectable part in the serially connectable part forming part and the parallel connectable part forming part,
The manufacturing method of the solar cell which has this. The power generation part forming step includes:
Forming a plurality of transparent conductive films as a first electrode on the first substrate in a row or matrix;
Forming a semiconductor layer on each of the plurality of transparent conductive films;
Forming a plurality of opposing conductive films as a second electrode on the second substrate in a line or matrix;
Bonding the first substrate and the second substrate at an interval;
Sealing after injecting an electrolyte into an internal space formed by the first substrate and the second substrate facing each other;
The manufacturing method of the solar cell of Claim 5 which has these. The connectable part forming step includes
7. The method according to claim 5, further comprising disposing a metal that can be melted by laser irradiation at each of the first substrate connection portion and the second substrate connection portion formation portion and the parallel connection portion formation portion. The manufacturing method of the solar cell of description.  The method for manufacturing a solar cell according to claim 7, wherein one or more alloys of silver and nickel are used as the metal. A solar cell dividing step of dividing the solar cell so as to include two or more solar cell power generation units from the solar cell manufactured by the solar cell manufacturing method according to any one of claims 5 and 6;
Connection for selectively connecting the series connectable portion and the parallel connectable portion of each of the solar cell power generation units of the divided solar cells so that the two or more solar cell power generation units are connected in a desired pattern Process,
The manufacturing method of the solar cell module which has. A solar cell dividing step of dividing the solar cell so as to include two or more solar cell power generation units from the solar cell manufactured by the solar cell manufacturing method according to any one of claims 7 and 8,
Laser irradiation is selectively performed on the serially connectable portion and the parallel connectable portion of each of the solar cell power generation units of the divided solar cells so that the two or more solar cell power generation units are connected in a desired pattern. A connection process to be performed;
The manufacturing method of the solar cell module which has.

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