JP2014120263A - Dye-sensitized solar cell, method for manufacturing the sane, and method for constructing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a working electrode and a counter electrode of a sheet-like dye-sensitized solar cell from causing defects even when elongation is caused in the dye-sensitized solar cell.SOLUTION: A dye-sensitized solar cell has a structure where an electrolyte is filled between a first film material and a second film material. Mesh-like first and second electrodes each having a many numbers of vertical lines and transverse lines are provided on surfaces of the first and second film materials, respectively, the surfaces facing each other. In the dye-sensitized solar cell, among angles formed between a reference line along a predetermined extension direction of the dye-sensitized solar cell, and the vertical lines 131 and the transverse lines 132, small angles are within a range from 30 to 60°.

Description

  The present invention relates to a dye-sensitized solar cell.

As a genre of solar cells, dye-sensitized solar cells are known. The dye-sensitized solar cell generally has the following structure.
The dye-sensitized solar cell has two electrodes. One of the two electrodes is a counter electrode (positive electrode), and the other is a working electrode (negative electrode). At least a part of the two electrodes is wrapped with a light-transmitting material.
A dye is attached to the working electrode via a metal oxide. The working electrode is also adapted to be exposed to light (for example, sunlight) that has entered from the translucent portion of the material described above. The dye is such that it receives and excites light and emits electrons.
Electrons emitted from the dye receiving light are extracted to the outside through the metal oxide and the working electrode. On the other hand, the space surrounded by the material is filled with an electrolyte solution that includes an electrolyte that receives electrons from the counter electrode, passes the electrons to the excited dye, and returns the excited dye to a normal state. . Due to the presence of these dyes, metal oxides, and electrolytes, electrons circulate in the order of dye → metal oxide → working electrode → external → counter electrode → electrolyte → dye.
Thus, the dye-sensitized solar cell generates an electromotive force when it receives light, and functions as a battery.
Such a dye-sensitized solar cell is relatively easy to manufacture, can be produced with low energy, and at least a part of the dye-sensitized solar cell is flexible by using the above material having translucency as a film material. There is an advantage that it can be made into a sheet-like material having a large thickness, and there is a great expectation for practical use in the future.

  A sheet-like dye-sensitized solar cell is generally realized as a structure in which an electrolyte solution is filled between two film materials. And in the conventional sheet-like dye-sensitized solar cell, the above-mentioned working electrode and counter electrode are often formed by, for example, applying a conductive polymer to the opposing surfaces of two films. Is a transparent conductive layer.

However, sheet-shaped dye-sensitized solar cells are not without their points to be improved.
The sheet-like dye-sensitized solar cell as a whole may be used as a building material, for example, like a sheet-like film material often used as a building material. In such a case, in the dye-sensitized solar cell, for example, the initial tension may be intentionally put by the contractor for the purpose of increasing the rigidity, and even if the initial tension cannot be put. Tension may be applied due to wind and rain after construction, or loads due to snow.
When a tension is applied to the sheet-like dye-sensitized solar cell, the whole extends in a direction along the tension, and two films extend. Since a conductive layer made of a conductive polymer generally has a property that it is difficult to stretch, there is a possibility that breakage may occur when two films are stretched. When such a situation occurs, the power generation capability of the dye-sensitized solar cell may be reduced.

  This invention makes it the subject to prevent a malfunction from arising in the working electrode and the counter electrode even when elongation occurs in the sheet-like dye-sensitized solar cell.

In order to solve the above-mentioned problems, the present inventor proposes the following invention.
The invention is as follows.
The inventor proposes that a first film material, which is a film material allowed to elongate in a predetermined range, and a predetermined distance from the first film material allowed to elongate in a predetermined range. The second film material, which is a transparent or semi-transparent film material arranged at an interval, and includes a plurality of vertical lines and a large number of horizontal lines, both of which are conductive, the second of the first film material. A mesh-like first electrode fixed in parallel to the first film material is applied to the surface facing the film material, and a metal oxide having a dye adsorbed on the surface thereof, and both of them are conductive. A mesh-like second electrode fixed in parallel to the second film material on a surface of the second film material facing the first film material, including a plurality of vertical lines and a plurality of horizontal lines, Receiving and exciting, supplying electrons to the dye that has emitted electrons supplied from the second electrode to the outside, The first electrode and the second electrode are in contact with each other between the first film material and the second film material containing an electrolyte having a function of receiving supply of electrons from the first electrode. And a method for constructing a dye-sensitized solar cell in the form of a sheet as a whole.
And, in the method of constructing the dye-sensitized solar cell, the direction of the dye-sensitized solar cell at the time of construction is a reference line that is a line along the direction in which the tension enters after construction, and the first The smaller one of the angles formed by the vertical and horizontal lines in one electrode is 30 ° to 60 °, and the smaller of the angles formed by the reference line and the vertical and horizontal lines in the second electrode. Both are set to be 30 ° to 60 °.

The dye-sensitized solar cell used in this construction method is not changed in principle from that described in the prior art, and the power generation principle is particularly the same.
The difference is that both the first electrode functioning as a counter electrode and the second electrode functioning as a working electrode are mesh electrodes.
However, when the dye-sensitized solar cell according to the present invention is normally applied, when tension is applied in the direction of the vertical line or horizontal line in the first electrode or the vertical line or horizontal line in the second electrode, There is a possibility that a vertical line or horizontal line in the first electrode or a vertical line or horizontal line in the second electrode along the direction of the tension may be cut. The first electrode fixed to the first film material is assumed not to extend as much as the first film material because it is made of, for example, a metal or a conductive polymer, and the second film material Since the second electrode fixed to, for example, is a fiber coated with a metal or a conductive polymer, it is assumed that the second film material does not stretch as much as the second film material. I must.
Therefore, in the present invention, a reference line that is a line along a direction that is planned as a direction in which tension is applied after construction, an angle formed by a vertical line and a horizontal line in the first electrode, a reference line, and a vertical line in the second electrode A sheet-like dye-sensitized solar cell is used so that both the angle formed by the line and the horizontal line is in the range of 30 ° to 60 °. In other words, in the present invention, the vertical lines and horizontal lines in the first electrode, the vertical lines and horizontal lines in the second electrode are not parallel to or close to the reference line, but are about 30 ° to 60 ° with respect to the reference line. The dye-sensitized solar cell is constructed so as to maintain the angle.
Then, even if the sheet-like dye-sensitized solar cell extends in the direction along the reference line, either the vertical line in the first electrode, the horizontal line, the vertical line in the second electrode, or the horizontal line, It can be prevented that the elongation in the direction along the reference line is forced as it is. In addition, when the dye-sensitized solar cell is constructed in this way, the reference line is one of the quadrangle formed by the vertical and horizontal lines in the first electrode or the quadrangle formed by the vertical and horizontal lines in the second electrode. Since it is in a state along or close to the diagonal line, even if a force extending in the direction along the reference line is applied to the first electrode or the second electrode, the above-mentioned square is deformed like a pantograph, so that the extension Can be absorbed.
Therefore, when the vertical line, horizontal line in the first electrode, the vertical line in the second electrode, and the horizontal line satisfy the above relationship with the reference line, the vertical line, horizontal line in the first electrode, and in the second electrode Since the vertical and horizontal lines can have a certain degree of relief with respect to the elongation of the dye-sensitized solar cell, the first line is extended when the tension-sensitized dye-sensitized solar cell is extended. Possibility of separation of electrode from first film material, separation of second electrode from second film material, disconnection of vertical or horizontal line in first electrode, disconnection of vertical or horizontal line in second electrode Can be reduced.
In addition, the reference line in this construction method is a line along the direction planned as the direction in which the tension enters after construction as described above. The tension in this case is the initial tension that the contractor intentionally puts in the dye-sensitized solar cell for the purpose of increasing the rigidity of the dye-sensitized solar cell, and whether the initial tension is entered or not. Regardless, it includes both the tension applied to the dye-sensitized solar cell by the load of wind and rain after construction or snow. The latter tension is not intended to be applied to the dye-sensitized solar cell by the operator, but is predictable from the shape and arrangement of the dye-sensitized solar cell.

As described above, in the method for applying the dye-sensitized solar cell of the present application, the dye-sensitized solar cell may be applied by applying tension in a direction along the reference line. In that case, since the reference line becomes clear, it is easy to obtain the effect of the present invention.
Moreover, in the construction method of the dye-sensitized solar cell of the present application, as the dye-sensitized solar cell, the breaking elongation of the first film material and the second film material in the direction along the reference line is 3%. The above can also be used. The more the elongation of the first film material and the second film material is allowed, the more the first electrode is detached from the first film material, the second electrode is detached from the second film material, or There is a greater risk that a vertical line or horizontal line break, or a vertical line or horizontal line break in the second electrode will occur. From such a viewpoint, when the first film material and the second film material have a breaking elongation of 3% or more, the effect of the present invention can be easily obtained.

As described above, the dye-sensitized solar cell used in the method of constructing the dye-sensitized solar cell of the present application may be the same as described in the prior art. However, if the following dye-sensitized solar cell is used, the above-described effects obtained by the method for applying the dye-sensitized solar cell of the present application can be obtained more easily.
The dye-sensitized solar cell proposed by the present inventor for the purpose is as follows.
The dye-sensitized solar cell includes a first film material that is a film material that is allowed to elongate in a predetermined range, and a predetermined interval from the first film material that is allowed to elongate in a predetermined range. The second film material of the first film material, which includes a second film material that is a transparent or translucent film material, and a plurality of vertical lines and a large number of horizontal lines, both of which are conductive. A mesh-like first electrode fixed in parallel to the first film material and a metal oxide having a dye adsorbed on the surface thereof are applied to a surface facing the first film material, and both of them have conductivity. A mesh-like second electrode fixed in parallel to the second film material on the surface of the second film material facing the first film material, including a number of vertical lines and a number of horizontal lines; Electrons are supplied to the dye that has been excited to emit electrons supplied from the second electrode to the outside, and the first electrode Water-tight so as to be in contact with the first electrode and the second electrode between the first film material and the second film material containing an electrolyte having a function of receiving supply of electrons from the electrode And a dye-sensitized solar cell having a rectangular sheet shape as a whole.
In the dye-sensitized solar cell, the smaller one of the angles formed by the reference side which is one side of the rectangular shape of the dye-sensitized solar cell and the vertical line and the horizontal line in the first electrode is the same. The smaller one of the angles formed by the reference side and the vertical and horizontal lines in the second electrode is 30 ° to 60 °.

This dye-sensitized solar cell is basically the same as a conventional dye-sensitized solar cell, but its shape is rectangular (including a square), and the rectangular shape of the dye-sensitized solar cell is the same. The smaller one of the angles formed by the reference side which is one side and the vertical line and horizontal line in the first electrode is 30 ° to 60 °, and the reference side and the vertical line in the second electrode And the smaller one of the angles formed by the horizontal lines is 30 ° to 60 °.
That is, in this dye-sensitized solar cell, the vertical line and horizontal line in the first electrode, and the vertical line and horizontal line in the second electrode are all parallel to any side of the rectangular dye-sensitized solar cell. Instead, each side is at an appropriate angle in the range of 30 ° to 60 °. This is because when a rectangular dye-sensitized solar cell is constructed, the tension is often applied along one of the four sides, whether applied intentionally or unintentionally. The reference side which is one side of the rectangular dye-sensitized solar cell is treated as the same as the reference line in the method for constructing the dye-sensitized solar cell according to the present invention, and the reference side The vertical line, horizontal line in one electrode, vertical line, horizontal line in the second electrode all satisfy the above-mentioned relationship to be satisfied with the above-mentioned reference line in the method for constructing a dye-sensitized solar cell according to the present invention. If the same relationship is satisfied, if the dye-sensitized solar cell is applied normally or by a general method, the vertical line in the first electrode, the horizontal line, the vertical line in the second electrode, Any of the horizontal lines automatically, the dye-sensitized solar according to the present invention It will satisfy the above relationship to be satisfied with the above reference line in the construction method of the pond.
That is, this dye-sensitized solar cell can easily obtain the effects obtained by the above-described method for applying the dye-sensitized solar cell according to the present invention.
The rectangular dye-sensitized solar cell has four sides, and when the smaller one of the sides is within a range of 30 ° to 60 °, the other side The same relationship is satisfied among the three sides. That is, the reference side may be any of the four sides of the rectangular dye-sensitized solar cell.

In the dye-sensitized solar cell of the present invention, the vertical line and the horizontal line in the first electrode may be orthogonal, and the vertical line and the horizontal line in the second electrode may be orthogonal. Of course, only one of the condition that the vertical and horizontal lines in the first electrode are orthogonal and the condition that the vertical and horizontal lines in the second electrode are orthogonal may be satisfied. It is easiest to manufacture such that the vertical and horizontal lines in the first electrode or the second electrode are orthogonal.
In addition, the dye-sensitized solar cell used in the method for constructing the dye-sensitized solar cell of the present application also has the condition that the vertical line and the horizontal line in the first electrode are orthogonal, and the vertical line in the second electrode and It may satisfy at least one of the conditions that the horizontal lines are orthogonal.

In the dye-sensitized solar cell according to the present invention, the breaking elongation of the first film material and the second film material in the direction along two adjacent sides of the rectangular shape of the dye-sensitized solar cell is 3% or more. It may be.
For the same reason as described in the method of installing the dye-sensitized solar cell according to the present invention, when the dye-sensitized solar cell is stretched, the first electrode is detached from the first film material, and the second electrode is It is easier to obtain the effect of reducing the possibility of detachment from the second film material, disconnection of vertical lines or horizontal lines in the first electrode, and disconnection of vertical lines or horizontal lines in the second electrode.

In the dye-sensitized solar cell according to the present invention, at least a part of each of the vertical line and the horizontal line in the first electrode may be fixed to the first film material, or the first line extends substantially over the entire length. It may be fixed to the membrane material. In the dye-sensitized solar cell according to the present invention, at least a part of both the vertical line and the horizontal line in the second electrode may be fixed to the second film material, It may be fixed to the second film material.
In the dye-sensitized solar cell used in the method for applying the dye-sensitized solar cell of the present application, at least a part of both the vertical and horizontal lines in the first electrode is fixed to the first film material. Alternatively, it may be fixed to the first film material over substantially the entire length thereof. In the dye-sensitized solar cell used in the method for constructing the dye-sensitized solar cell of the present application, at least a part of both the vertical and horizontal lines in the second electrode is fixed to the second film material. Alternatively, it may be fixed to the second film material over substantially the entire length thereof.
The fixing of the first film material and the first electrode and the fixing of the second film material and the second electrode may be, for example, by heat welding by heating at a temperature equal to or higher than the melting point of the first film material or the second film material. it can. In the case where the first film material and the second film material are made of resin or rubber, if heat welding is performed, the first electrode is buried in the first film material or the second electrode is somewhat buried in the second film material. Since it is fixed in the state, it is possible to easily realize strong fixing.
Even in the dye-sensitized solar cell used in the method of constructing the dye-sensitized solar cell of the present application, the first electrode and the first film material, or the second electrode and the second film material are used in such a method. It may be fixed.

The first electrode and the second electrode of the dye-sensitized solar cell of the present application include a vertical line and a horizontal line. These vertical lines and horizontal lines are made of, for example, metal as described above. In this case, examples of the metal include titanium, chromium, tungsten, molybdenum, platinum, tantalum, niobium, zirconium, zinc, various stainless steels, and these. Alloy. The vertical and horizontal lines can be coated with platinum or the like.
Alternatively, the vertical lines and horizontal lines are made of fibers coated with a conductive polymer, for example, as described above. In this case, the vertical lines and horizontal lines are generally non-metallic fibers, and the conductive polymer It is assumed that was applied. The first electrode and the second electrode may be formed by applying a conductive polymer to a fabric such as a woven fabric or a knitted fabric.
The diameter (P) of the vertical line and horizontal line is preferably 100 μm or less, but is preferably 50 μm or less in order to ensure the flexibility of the dye-sensitized solar cell.
The opening of the vertical line and the horizontal line can be 50 to 800 mesh (lines / 1 inch), but the smaller the opening, the easier it is to increase the electromotive force of the dye-sensitized solar cell.
In general, both the first electrode and the second electrode should have a small thickness. The thickness is, for example, 1 to 100 μm, and it is preferable to make the thickness smaller than 50 μm.
In addition, even if the dye-sensitized solar cell used in the method for constructing the dye-sensitized solar cell of the present application satisfies the above-described conditions with respect to the first electrode, the second electrode, and the vertical and horizontal lines included therein. Good.

The dye is adsorbed on the second electrode of the dye-sensitized solar cell of the present application via a metal oxide.
Examples of the metal oxide include titanium oxide, zinc oxide, tin oxide, tungsten oxide, zirconium oxide, hafnium oxide, strontium oxide, indium oxide, yttrium oxide, lanthanum oxide, vanadium oxide, niobium oxide, tantalum oxide, chromium oxide, Molybdenum oxide, iron oxide, nickel oxide, silver oxide, and copper oxide can be used. The particle diameter of the metal oxide can be, for example, 1 to 150 nm as the primary particle diameter, but is preferably 5 to 20 nm. The reason is that the smaller the particle diameter, the higher the specific surface area is obtained, so that more dyes can be adsorbed and the number of particles per unit area increases, so the number of contacts between metal oxides increases. This is because electrons are easily transferred, but if the particle diameter is too small, it is difficult to maintain the particle diameter.
Examples of the dye include xanthene dyes, coumarin dyes, triphenylmethane dyes, cyanine dyes, merocyanine dyes, phthalocyanine dyes, porphyrin dyes, polypyridine metal complex dyes, ruthenium bipyridinium dyes, and azo dyes. , Quinone dyes, quinone imine dyes, quinacridone dyes, squalium dyes, perylene dyes, indigo dyes, naphthalocyanine dyes, metal complex dyes (center metal is Ru (ruthenium), Fe (iron), Cr (chromium) ), Co (cobalt), Os (osmium), Re (rhenium), Cu (copper), Pt (platinum), etc.), and a mercurochrome dye.
In addition, the dye-sensitized solar cell used with the construction method of the dye-sensitized solar cell of this application may satisfy the above conditions regarding a metal oxide and a pigment | dye.

The first film material used in the dye-sensitized solar cell of the present application may be made of resin or rubber.
Examples of the resin or rubber that can be used for the first film material include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), and polystyrene. (PS), acrylic resin (PMMA), polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer Fluorine resin such as coalescence (PFA), tetrafluoroethylene-ethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), or chloroprene rubber (CR), Ethylene propylene rubber ( EPDM) and the like.
The first film material used in the dye-sensitized solar cell of the present application is obtained by coating at least one surface of a film substrate that is a woven fabric or a knitted fabric with fibers with the above-described resin or rubber. Also good.
The fibers constituting the woven fabric or knitted fabric in this case can be natural fibers such as kenaf fibers, synthetic fibers such as polyester fibers, inorganic fibers such as glass fibers, or the like.
The second film material can be made of resin, but is required to be transparent or semi-transparent from the viewpoint of power generation efficiency, so unlike the first film material, it is difficult to use rubber as the material. . The example of the resin used as the material of the second film material is substantially the same as the example of the resin that can be used as the material of the first film material, but PTFE is excluded from the request for being transparent or translucent. For the same reason, it is difficult to employ a second membrane material in which at least one surface of a membrane substrate that is a woven fabric or a knitted fabric is coated with a resin or rubber.
Both the first film material and the second film material preferably have flexibility. Since the power generation efficiency can be improved by increasing the transmissivity, the thickness of the second film material is preferably as thin as possible.
The dye-sensitized solar cell used in the method for constructing the dye-sensitized solar cell of the present application is a dye-sensitized solar cell that applies the first film material or the second film material as described above. Also good.

An electrolyte containing an electrolyte is sealed between the first film material and the second film material of the dye-sensitized solar cell of the present application.
The electrolyte has a function of receiving electrons from the first electrode as well as supplying electrons to the dye that is excited by receiving light and emits electrons supplied from the second electrode to the outside.
As examples of the electrolyte, iodine / iodide ions, bromine / bromide ions, cobalt complexes, and the like can be used.
More specifically, a combination of iodine and a metal iodide such as LiI (lithium iodide), NaI (sodium iodide), KI (potassium iodide), iodine, an iodide salt of a quaternary imidazolium compound, Examples include combinations of iodide salts of quaternary pyridinium compounds, iodide salts of tetraalkylammonium compounds, and the like. Also, a combination of bromine and a metal bromide such as LiBr (lithium bromide), NaBr (sodium bromide), KBr (potassium bromide), bromine, bromide salt of quaternary imidazolium compound, bromide of quaternary pyridinium compound Examples include combinations of salts, bromide salts of tetraalkylammonium compounds, and the like. Alternatively, ions or fluorides containing [CoII (bpy) ₃ ] (B (CN) ₄ ) ₂ , [CoIII (bpy) ₃ ] (B (CN) ₄ ) ₃ , halogen atoms (eg, fluorine, chlorine) Ion, chloride ion, perchlorate ion, perbromate ion, periodate ion, chlorate ion, bromate ion, iodate ion, chlorite ion, bromate ion, iodate ion, hypochlorous acid Examples are chlorate ions, hypobromite ions and hypoiodite ions.
Examples of solvents for dissolving these electrolytes include alcohols such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and t-butanol, acetonitrile, propionitrile, methoxypropionitrile, and adiponitrile. , Nitriles such as methoxyacetonitrile and glutaronitrile, aromatic compounds such as benzene, toluene, o-xylene, m-xylene and p-xylene, alkanes such as pentane, heptane, hexane and cyclohexane, heptane, acetone and methyl ethyl ketone , Ketones such as diethyl ketone and 2-butanone, ethers such as diethyl ether and tetrahydrofuran, carbonates such as ethylene carbonate and propylene carbonate, γ-butyrolactone, γ-valerolac Cyclic esters such as tons, amides such as dimethylformamide, dimethylacetamide, and hexamethylphosphoamide, and polyhydric alcohols such as methylpyrrolidinone, dimethyl sulfoxide, dioxolane, dimethoxyethane, sulfolane, ethylene glycol, and propylene glycol are available. .
The dye-sensitized solar cell used in the method for constructing the dye-sensitized solar cell of the present application may be a dye-sensitized solar cell using the electrolyte as described above and an electrolytic solution containing a solvent. .

The dye-sensitized solar cell in the present invention can be manufactured, for example, by the following manufacturing method.
In the manufacturing method, a large number of vertical lines and a large number of horizontal lines, each of which is made of a metal having conductivity, are formed on one surface of a first film material which is a film material allowed to stretch within a predetermined range. Including a mesh-shaped first electrode, a process of fixing the first electrode in parallel with the first film material, on one surface of the second film material that is a transparent or translucent film material allowed to stretch in a predetermined range, A mesh-like second electrode comprising a large number of vertical lines and a large number of horizontal lines, each of which is coated with a metal oxide having a dye adsorbed on its surface, and each of which is made of a conductive metal, The process of fixing in parallel with the second film material, the peripheral portion of the first film material to which the first electrode is fixed, and the peripheral portion of the second film material to which the second electrode is fixed In a state where the surface on the side to which one electrode is fixed and the surface on the side to which the second electrode is fixed are opposed to each other, A connection process in which the first film material and the second film material are not connected in the connection process, and light is transmitted to the space between the first film material and the second film material. Electrolysis including an electrolyte having a function of supplying electrons to the dye that has received and excited to emit electrons supplied from the second electrode to the outside and receives electrons from the first electrode. A method for producing a dye-sensitized solar cell, comprising: supplying a liquid, and then watertightly connecting a portion where the first film material and the second film material are not connected in the connection process.
A dye-sensitized solar cell according to the present invention can be easily obtained by preparing in advance one having the first electrode fixed on one side of the first film material and one having the second electrode fixed on one side of the second film material. Can be manufactured.

In the method of manufacturing a dye-sensitized solar cell described above, it is not always necessary to do so, but in the process of fixing the first electrode to one surface of the first film material, the longitudinal direction in the first electrode is In the process of fixing both the line and the horizontal line to the first film material over substantially the entire length and fixing the second electrode to one surface of the second film material, the vertical line in the second electrode In addition, both the horizontal line and the horizontal line may be fixed to the second film material over substantially the entire length thereof.
Here, “fix both the vertical and horizontal lines in the first electrode to the first film material over substantially the entire length thereof” and “both the vertical and horizontal lines in the second electrode, The term “substantially full length” in the sentence “fix to the second film material over substantially the entire length” means, for example, the ends of the vertical and horizontal lines in the first electrode or the second electrode, and the vertical and horizontal lines overlap. It means that it is allowed that the vertical line and the horizontal line are not fixed to the first film material or the second film material in a part or the like.

In the method for producing a dye-sensitized solar cell described above, the second electrode is applied to the second electrode by spraying a solution containing the metal oxide, drying the solution, and then firing the solution. The manufacturing process may further be included.
Compared to the case where the metal oxide is applied to the second electrode by other methods, for example, the screen printing method, the case where the metal oxide is applied to the second electrode by spraying is the second electrode of the metal oxide. It has been confirmed by the inventor of the present application that the drop-off from the device is suppressed.

Sectional drawing which shows the structure of the dye-sensitized solar cell in one Embodiment of this application. The top view which expands and shows the relationship between the 1st film | membrane material and 1st electrode which are contained in the dye-sensitized solar cell shown in FIG. The top view which shows the example with which the relationship between the 1st film | membrane material and 1st electrode contained in the dye-sensitized solar cell shown in FIG. 1 is permitted, and the example which is not permitted. The top view which shows the manufacturing method of the dye-sensitized solar cell shown in FIG. The top view which shows the construction example of the dye-sensitized solar cell shown in FIG.

  Hereinafter, a preferred embodiment of the present invention will be described.

<Configuration of dye-sensitized solar cell>
A cross section of the dye-sensitized solar cell 100 of this embodiment is shown in FIG.
The dye-sensitized solar cell 100 is formed in a sheet shape as a whole. The dye-sensitized solar cell 100 also includes a first film material 110 and a second film material 120, both of which are film materials. The gap between the first film material 110 and the second film material 120 is arranged substantially in parallel according to the gap between the first electrode 130 and the second electrode 140 described later.
A first electrode 130 and a second electrode 140, which are mesh electrodes, are provided on the surfaces of the first film material 110 and the second film material 120 facing each other.
Further, the space between the first film material 110 and the second film material 120 is filled with the electrolytic solution 150.

  The first film material 110 and the second film material 120 are film materials as described above, and both are allowed to extend within a predetermined range and both have flexibility. The first film material 110 and the second film material 120 have substantially the same size and shape. In this embodiment, the first film material 110 and the second film material 120 are rectangular, although not limited thereto. The breaking elongation of the first film material 110 and the second film material 120 is 3% or more in the direction of a reference line to be described later and also in the direction perpendicular to the reference line.

The first membrane material 110 of this embodiment is formed by coating at least one surface of a membrane base material that is a woven or knitted fabric formed of fibers with resin or rubber. Since such a thing is marketed normally, it is also possible to use it for the 1st film | membrane material 110. FIG. The first film material 110 shown in FIG. 1 is made by covering both surfaces of a woven fabric with resin or rubber.
In FIG. 1, 111 is a warp yarn constituting the woven fabric, and 112 is a weft yarn constituting the woven fabric. The fibers constituting the woven fabric can be natural fibers such as kenaf fibers, synthetic fibers such as polyester fibers, or inorganic fibers such as glass fibers. The weaving method is, for example, plain weave, twill weave, satin weave or the like. When the membrane substrate is a knitted fabric, the knitting method can be, for example, a tricot knitting.
In FIG. 1, reference numeral 113 denotes a resin or rubber for covering the fabric. Examples of the resin or rubber 113 that can be used for the first film material 110 include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyurethane (PU), and ethylene-vinyl acetate copolymer (EVA). , Polystyrene (PS), and acrylic resin (PMMA). Alternatively, polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-ethylene copolymer (ETFE) , A fluororesin such as polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF). Alternatively, rubber such as chloroprene rubber (CR) and ethylene propylene rubber (EPDM) can be used.
The thickness of the first film material 110 is 150 to 1000 μm.
In addition, the 1st film | membrane material 110 can be made only of resin or rubber | gum which does not have a textile fabric and a knitted fabric. The resin or rubber that can be used in that case is the same as described above.

On the other hand, the second film material 120 is made of resin. Since such a thing is marketed normally, it is also possible to use it for the 2nd film | membrane material 120. FIG. The second film material 120 is transparent or translucent. The visible light transmittance of the second film material 120 determined depending on the material, thickness, and the like is 80% or more, and particularly preferably 90% or more.
The resin that is the material of the second film material 120 is in principle the same as the resin that can be the material of the first film material 110, but PTFE is excluded.
The thickness of the 2nd film | membrane material 120 can be 100-500 micrometers, More preferably, it can be 150-350 micrometers. By setting it as such a range, it becomes possible to obtain the intensity | strength as a final sheet | seat, etc. while maintaining appropriate translucency.

The first electrode 130 and the second electrode 140 are mesh-like electrodes as described above, and include a large number of vertical lines and horizontal lines. Although not necessarily limited thereto, the first electrode 130 and the second electrode 140 are made by weaving vertical lines and horizontal lines in plain weave.
Both the first electrode 130 and the second electrode 140 are made of metal having conductivity. The metal which comprises a vertical line and a horizontal line is titanium, chromium, tungsten, molybdenum, platinum, tantalum, niobium, zirconium, zinc, various stainless steels, and these alloys, for example. The vertical and horizontal lines may be coated with platinum or the like.
As another example of the first electrode 130 and the second electrode 140, the vertical line and the horizontal line are electrically conductive to a fiber cloth (whether woven cloth or knitted cloth) made of a synthetic fiber or inorganic fiber that is not made of metal. It may be one coated with a conductive polymer.
The diameter (P) of the vertical and horizontal lines is preferably 100 μm or less, but in order to ensure the flexibility of the dye-sensitized solar cell 100, it is preferably 50 μm or less. Openings of vertical lines and horizontal lines can be 50 to 800 mesh. When the vertical lines and horizontal lines are smaller, it is easier to increase the electromotive force of the dye-sensitized solar cell 100, and the possibility of the metal oxide 141 entering the mesh eyes is reduced and tension is applied. The dropout of the metal oxide in a state where the elongation is given can be reduced and the reduction in power generation efficiency can be reduced, but considering the application of the metal oxide 141 and the like, 200-500 mesh It is preferable to do.
The smaller the distance between the first electrode 130 and the second electrode 140, the better the power generation efficiency. The space | interval is 1-100 micrometers, for example, and it is preferable to make thickness thinner than 50 micrometers.

The dye is adsorbed on the metal oxide 141 of the second electrode 140.
As the metal oxide 141, those conventionally used in the dye-sensitized solar cell 100 can be used. Specifically, examples of the metal oxide 141 include titanium oxide, zinc oxide, tin oxide, tungsten oxide, zirconium oxide, hafnium oxide, strontium oxide, indium oxide, yttrium oxide, lanthanum oxide, vanadium oxide, and niobium oxide. Tantalum oxide, chromium oxide, molybdenum oxide, iron oxide, nickel oxide, silver oxide, and copper oxide can be used. The particle diameter of the metal oxide 141 can be, for example, 1 to 150 nm as a primary particle diameter, but is preferably 5 to 20 nm.
As the dye to be adsorbed on the metal oxide 141, a dye conventionally used in the dye-sensitized solar cell 100 can be used. Examples of such dyes include xanthene dyes, coumarin dyes, triphenylmethane dyes, cyanine dyes, merocyanine dyes, phthalocyanine dyes, porphyrin dyes, polypyridine metal complex dyes, ruthenium bipyridinium dyes, azo dyes. Dye, quinone dye, quinone imine dye, quinacridone dye, squalium dye, perylene dye, indigo dye, naphthalocyanine dye, metal complex dye (the central metal is Ru (ruthenium), Fe (iron), Cr ( (Chromium), Co (cobalt), Os (osmium), Re (rhenium), Cu (copper), Pt (platinum), etc.), and a mercurochrome pigment.
A method for applying the metal oxide 141 to the second electrode 140 will be described later.

  The first electrode 130 is a part of the first film material 110 facing the second film material 120, and the second electrode 140 is a part of the second film material 120 facing the first film material 110 (for example, a part thereof (for example, , About half of it) is buried and fixed. The first electrode 130 is fixed to the first film material 110 over the entire length, and the second electrode 140 is fixed to the second film material 120 over the entire length. Such a fixing method will be described later.

The first electrode 130 and the second electrode 140 include a vertical line 131 and a horizontal line 132 as shown in FIG. 2 (note that the naming of the vertical line 131 and the horizontal line 132 is convenient and both are It may be replaced.) The vertical line 131 and the horizontal line 132 of the first electrode 130 are such that the smaller one of the angles formed with any side of the first film material 110 is 30 ° to 60 °.
FIG. 2 shows the relationship between the first film material 110 and the vertical lines 131 and horizontal lines 132 in the first electrode 130. The balloon-like view at the lower right in FIG. 2 is an enlarged view of a part of the first film material 110. In addition, the line segment indicated by the two-dot chain line with the symbol X in the figure indicates the upper and lower sides in FIG. 2 of the first film material 110 having a rectangular shape (the length of the dye-sensitized solar cell 100). Line segment parallel to (side). In this embodiment, one of the upper and lower sides of the film material 110 in FIG. 2 is a reference side in the dye-sensitized solar cell 100 of the present application.
In FIG. 2, the smaller one of the angles formed by the vertical line 131 and the line segment X is the angle A1, and the smaller one of the angles formed by the horizontal line 132 and the line segment X is the angle A2. Both of these are in the range of 30 ° to 60 °. Specifically, in this example, both the angles A1 and A2 are 35 °. In other words, the vertical line 131 and the horizontal line 132 of the first electrode 130 have a smaller angle of 30 ° to 60 ° among the angles formed with the reference side of the first film material 110. If the reference side is one of the left and right sides in FIG. 2 of the rectangular first film material 110, the angle formed by the vertical line 131 or the horizontal line 132 is (90−A1) °, respectively. , (90-A2) °. If A1 and A2 are in the range of 30 ° to 60 °, both (90-A1) ° and (90-A2) ° are included in the range of 30 ° to 60 °. In other words, the vertical line 131 and the horizontal line 132 of the first electrode 130 are related to the reference side which is an arbitrary side of the first film material 110, and the smaller one of the angles formed with the reference side is 30 °. As long as the relationship of ˜60 ° is satisfied, the smaller one of the angles formed with the other side of the first film material 110 is 30 ° to 60 °. Satisfy the relationship. This is the reason why the reference side may be any of the four sides of the first film material 110 having a rectangular shape.

Note that the angle at which the vertical line 131 and the horizontal line 132 are the reference sides is not necessarily required to be “same” as in the example illustrated in FIG. 2.
For example, in the example shown in FIG. 3A, the smaller one of the angles formed by the vertical line 131 and the line segment X is the angle A3, and the smaller one of the angles formed by the horizontal line 132 and the line segment X is Although the angle is A4, both the angle A3 which is 42 ° and the angle A4 which is 30 ° are in the range of 30 ° to 60 °, and the angle A3> the angle A4.
In the examples so far, the vertical line 131 and the horizontal line 132 are not orthogonal to each other. However, as shown in the example of FIG. 3B, the vertical line 131 and the horizontal line 132 may be orthogonal to each other. In this example, the smaller one of the angles formed by the vertical line 131 and the line segment X is the corner A5, and the smaller one of the angles formed by the horizontal line 132 and the line segment X is the corner A6, and both the angles A5 and A6 are included. 45 °.
3C and 3D, both the vertical line 131 and the horizontal line 132 of the first electrode 130 are related to the reference side which is an arbitrary side of the first film material 110, and the reference line This is an example in which the smaller one of the angles formed with the side does not satisfy the relationship of 30 ° to 60 °. In the example of FIG. 3C, the smaller one of the angles formed by the vertical line 131 and the line segment X is the corner A7, and the smaller one of the angles formed by the horizontal line 132 and the line segment X is the angle A8, and the angle A7. Is 80 ° and the angle A8 is 10 °. In the case of the example of FIG. 3D, since the angle formed by the vertical line 131 and the line segment X is both 90 ° and the horizontal line 132 and the line segment X are parallel, the smaller one of the angles formed by them originally exists. No, or 0 °.

Although not shown, the positional relationship between the vertical line and the horizontal line in the second electrode 140 with respect to the second film material 120 is the positional relationship between the vertical line 131 and the horizontal line 132 in the first electrode 130 with respect to the first film material 110. It has become the same. That is, the vertical line and the horizontal line of the second electrode 140 are related to the reference side which is an arbitrary side of the second film material 120, and the smaller one of the angles formed with the reference side is 30 ° to 60 °. It is intended to be in the range of °.
However, the angle between the vertical line and the horizontal line in the second electrode 140 with respect to each side of the dye-sensitized solar cell 100 is equal to each side of the dye-sensitized solar cell 100 in the vertical line 131 and horizontal line 132 in the first electrode 130. It is not necessary to match the angle with respect to.

The electrolytic solution is obtained by dissolving an electrolyte in a solvent.
The electrolyte has a function of receiving electrons from the first electrode as well as supplying electrons to the dye that is excited by receiving light and emits electrons supplied from the second electrode to the outside.
As examples of the electrolyte, iodine / iodide ions, bromine / bromide ions, cobalt complexes, and the like can be used.
More specifically, a combination of iodine and a metal iodide such as LiI (lithium iodide), NaI (sodium iodide), KI (potassium iodide), iodine, an iodide salt of a quaternary imidazolium compound, Examples include combinations of iodide salts of quaternary pyridinium compounds, iodide salts of tetraalkylammonium compounds, and the like. Also, a combination of bromine and a metal bromide such as LiBr (lithium bromide), NaBr (sodium bromide), KBr (potassium bromide), bromine, bromide salt of quaternary imidazolium compound, bromide of quaternary pyridinium compound Examples include combinations of salts, bromide salts of tetraalkylammonium compounds, and the like. Alternatively, ions or fluorides containing [CoII (bpy) ₃ ] (B (CN) ₄ ) ₂ , [CoIII (bpy) ₃ ] (B (CN) ₄ ) ₃ , halogen atoms (eg, fluorine, chlorine) Ion, chloride ion, perchlorate ion, perbromate ion, periodate ion, chlorate ion, bromate ion, iodate ion, chlorite ion, bromate ion, iodate ion, hypochlorous acid Examples are chlorate ions, hypobromite ions and hypoiodite ions.
Examples of solvents for dissolving these electrolytes include alcohols such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and t-butanol, acetonitrile, propionitrile, methoxypropionitrile, and adiponitrile. , Nitriles such as methoxyacetonitrile and glutaronitrile, aromatic compounds such as benzene, toluene, o-xylene, m-xylene and p-xylene, alkanes such as pentane, heptane, hexane and cyclohexane, heptane, acetone and methyl ethyl ketone , Ketones such as diethyl ketone and 2-butanone, ethers such as diethyl ether and tetrahydrofuran, carbonates such as ethylene carbonate and propylene carbonate, γ-butyrolactone, γ-valerolac Cyclic esters such as tons, amides such as dimethylformamide, dimethylacetamide, and hexamethylphosphoamide, and polyhydric alcohols such as methylpyrrolidinone, dimethyl sulfoxide, dioxolane, dimethoxyethane, sulfolane, ethylene glycol, and propylene glycol are available. .

  The first electrode 130 is connected to the connection line 135, and the second electrode 140 is connected to the connection line 145. The connection line 135 and the connection line 145 are for taking out current from the dye-sensitized solar cell 100. In FIG. 1, the connection line 135 and the connection line 145 are exposed from the end surfaces of the first film material 110 and the second film material 120, respectively, but such a configuration is not essential. For example, the first film material 110 Further, the connection line 135 and the connection line 145 may be exposed from the lower and upper surfaces of the second film material 120 in FIG.

  The reason why this dye-sensitized solar cell functions as a battery is the same as described in the prior art, so the description thereof is omitted.

<Method for producing dye-sensitized solar cell>
Next, a method for manufacturing the dye-sensitized solar cell 100 described above will be described.
In this embodiment, the first film material 110 and the second film material 120 are not necessarily limited to this, but commercially available materials are used, and description of the manufacturing method is omitted. But when manufacturing from the 1st film | membrane material 110 and the 2nd film | membrane material 120, they should just manufacture with a general manufacturing method well-known as a manufacturing method of the same kind of film | membrane material.
The metal mesh that constitutes the first electrode 130 and the second electrode 140 may also be a commercially available mesh. However, in this embodiment, the conditions (material, wire diameter, aperture, thickness, vertical length, which have already been described). That satisfy the angle of the line and the horizontal line, etc.).
The dye-sensitized solar cell 100 is manufactured using a metal mesh constituting the first film material 110, the second film material 120, the first electrode 130, the second electrode 140, and an electrolyte solution described later as main materials. The

First, the dye is adsorbed after the metal oxide 141 is applied to the second electrode 140. Specifically, a dispersion liquid in which a metal oxide as described above is dispersed in a solvent is prepared, applied to the second electrode 140 and fixed, and then the dye is adsorbed. Known methods can be used for the preparation of the dispersion, the method of coating the second electrode 140, and the method of adsorbing the dye.
The solvent of the dispersion liquid is, for example, water or alcohol. In addition, an acid such as acetic acid or hydrochloric acid, or acetylacetone is added to the dispersion as a dispersant. The above-described metal oxide 141 and dispersant are added to a solvent, and stirring is performed using a known rotation and revolution mixer or stirrer.
Next, the dispersion liquid prepared as described above is applied to the second electrode 140. As a coating method, a spray method, a doctor blade method, a screen printing method, a dip coating method, a spin coating method, or the like can be used. When applying the dispersion liquid to the second electrode 140, the mesh was not filled with the metal oxide 141 as much as possible, so that tension was applied to the completed dye-sensitized solar cell 100 as described later. Even in the case (a state in which the elongation is given), the metal oxide 141 is less likely to drop off from the second electrode 140, and the reduction in power generation efficiency can be reduced. The dispersion liquid can be applied to the second electrode 140 only on the surface of the second electrode 140 on the second film material 120 side (that is, the surface irradiated with light such as sunlight). It is also possible to apply the dispersion liquid on both surfaces of the second electrode 140 or on the entire surface of the vertical and horizontal lines included in the second electrode 140, so that the power generation efficiency can be increased. Even when tension is applied to the dye-sensitized solar cell 100 after completion as described later, the metal oxide 141 is less likely to be detached from the second electrode 140. This means that a decrease in power generation efficiency can be reduced even in a state where the elongation is given. In this embodiment, the dispersion liquid was applied to the entire surface of the vertical and horizontal lines included in the second electrode 140.

In this embodiment, the metal oxide 141 is applied to the second electrode 140 using a spray method and a screen printing method.
In the spray method, a titanium oxide paste for low temperature film formation (product number: PECC-C01-06, manufactured by Pexel Technologies Co., Ltd.) diluted to 50% by volume with 1-propanol is used for the second electrode 140. The metal oxide is fixed to the second electrode 140 by firing after repeating the process of applying uniformly by spraying from a position approximately 30 cm away from the second electrode 140 with a spray gun and then drying it 12 times. I let you.
On the other hand, in the screen printing method, a titania nano paste (product number: PST-18NR, manufactured by Catalyst Kasei Kogyo Co., Ltd.) and a 250 mesh screen plate are used for the second electrode 140 similar to that used in the spray method. After applying by screen printing method, drying, and then applying the paste again by screen printing method, drying, and then fixing the metal oxide to the metal mesh body by firing, then the metal mesh The dye was adsorbed on the metal oxide fixed on the body.

Next, the first electrode 130 was fixed to the first film material 110, and the second electrode 140 was fixed to the second film material 120.
The first electrode 130 is fixed to the first film material 110 by superimposing the first electrode 130 having substantially the same size and shape as the first film material 110 on the first film material 110 as a whole. The first film material 110 was heated to a temperature equal to or higher than the melting point of the resin or rubber 113 constituting the film, and then cooled. Note that the first electrode 130 may be pressed against the first film material 110 when the resin or rubber 113 is heated. As a result, the first electrode 130 is fixed to the first film material 110 in a state in which the vertical lines and horizontal lines are somewhat recessed into the first film material 110.
Similarly, the second electrode 140 is fixed to the second film material 120.

Next, the first film material 110 to which the first electrode 130 is fixed and the second film material 120 to which the second electrode 140 is fixed are overlapped so that the first electrode 130 and the second electrode 140 face each other. At the same time, as shown in FIG. 4, the edge 190 is fused in a watertight manner. The first film material 110 and the second film material 120 are fused using a known method, for example, at a temperature higher than the melting point of both resins constituting the first film material 110 and the second film material 120. The first film material 110 and the second film material 120 are pressed together while being heated, and then cooled to fuse the first film material 110 and the second film material 120.
However, in this embodiment, a part of the edge 190 is left as the opening 191 without being fused.

Next, the electrolytic solution is poured into the gap between the first film material 110 and the second film material 120 from the opening 191 described above.
The electrolytic solution is prepared by dissolving an appropriate one of the above-described electrolytes in an appropriate one of the above-described solvents.
For example, the electrolytic solution is formed between the first film material 110 and the second film material 120 through a tube whose tip is inserted into the gap between the first film material 110 and the second film material 120 from the opening 191 described above. Pour into the gap between them. If the position of the opening 191 of the fused first film material 110 and the second film material 120 is slightly increased or the gap between the opening 191 and the tube is eliminated, the electrolyte leaks from the opening 191. There is nothing.
Thereafter, the tube is pulled out from the opening 191, and the first film material 110 and the second film material 120 are also water-tightly fused at the opening 191.
As a result, the electrolytic solution is watertightly confined in the gap between the first film material 110 and the second film material 120.

This step may be performed earlier, but the connection line 135 is connected to the first electrode 130 and the connection line 145 is connected to the second electrode 140.
Thus, the dye-sensitized solar cell 100 is completed.

<Dye-sensitized solar cell construction method>
The dye-sensitized solar cell 100 of this embodiment is constructed as shown in FIG. 5, for example.
In this embodiment, the sheet-like dye-sensitized solar cell 100 is applied in a state of being laid between two parallel, equal-level walls 1 that support both end portions thereof. In the rectangular dye-sensitized solar cell 100, both short sides thereof are fixed to the upper end portion of the wall 1, respectively.
At this time, in the short side portion fixed to the wall 1 of the dye-sensitized solar cell 100, initial tension is applied to the dye-sensitized solar cell 100 in a direction along the long side by a known appropriate method.
In this way, the construction of the dye-sensitized solar cell 100 is finished.
Thereafter, when the dye-sensitized solar cell 100 is being used, tension may be applied to the dye-sensitized solar cell 100 due to wind and rain, snowfall, or the like.
Both the initial tension and the tension applied to the dye-sensitized solar cell 100 during use due to wind and rain, snowfall, and the like are along the long side direction of the rectangular dye-sensitized solar cell 100 as indicated by the arrow Y in FIG. It is applied to the dye-sensitized solar cell 100 in the direction. That is, the arrow Y is along a direction planned as a direction in which the tension is applied to the dye-sensitized solar cell 100 after the construction, and the direction along the direction is a reference line in the present invention.
Here, the direction indicated by the arrow Y that is the reference line coincides with the direction of the long side of the above-described rectangular dye-sensitized solar cell 100 that is the reference side. Therefore, the vertical line and the horizontal line included in the first electrode 130 and the second electrode 140 have a smaller angle of 30 ° to 60 of the angles formed with the long side of the dye-sensitized solar cell 100 as described above. Therefore, in the construction method described above, the vertical line and horizontal line included in the first electrode 130 and the second electrode 140 of the dye-sensitized solar cell 100 and the reference line are formed. The smaller one of the angles is 30 ° to 60 °.
Even if the dye-sensitized solar cell 100 thus constructed extends in the direction of the reference line, the first electrode 130 and the second electrode 140 are separated from the first film material 110 by the first electrode 130 and the second electrode 140. In addition, problems such as the second electrode 140 being detached from the second film material 120 or the vertical or horizontal lines included in the first electrode 130 or the second electrode 140 being broken are unlikely to occur.

<Experimental example>
The direction of the reference line with respect to the dye-sensitized solar cell 100 in which the smaller one of the angles formed by the vertical and horizontal lines included in the first electrode 130 and the second electrode 140 and the reference line is 45 ° A tensile test was performed in which tension was performed under the conditions shown in Table 1 below. Note that the dye-sensitized solar cell 100 subjected to the tensile test includes the metal oxide 141 applied to the second electrode 140 by the spray method described above and the metal oxide applied to the second electrode 140 by the screen print method described above. There are two types to which the object 141 is applied. Both the first electrode 130 and the second electrode 140 included in both dye-sensitized solar cells 100 were made of stainless steel, had a wire diameter of 18 μm, a plain weave, an aperture of 33 μm, and an aperture ratio of 41.9%.
[Table 1] Tensile test condition test piece width: 20 mm
Grasp interval: 70mm
Tensile speed: 20 mm / min
Initial tension: 0.4N

The test results are as shown in Table 2.
The rate of change on the vertical axis indicates how much metal oxide 141 applied to the second electrode 140 remains with respect to the elongation of the dye-sensitized solar cell 100 shown on the horizontal axis, that is, the elongation. The weight change rate of the 2nd electrode produced by the drop-off | omission of the apply | coated metal oxide 141 at the time of changing is shown. That is, even when the elongation increases, a smaller weight change rate indicates that the metal oxide 141 is less dropped even when the dye-sensitized solar cell 100 is extended. This means that the metal oxide 141 is not easily dropped off, and the power generation efficiency is not significantly lowered.
In Table 2, the numerical value indicated by the diamond-shaped mark described as the screen is the case of the dye-sensitized solar cell 100 in which the metal oxide 141 is applied to the second electrode 140 by the screen printing method. The numerical value indicated by the described square mark is the case of the dye-sensitized solar cell 100 in which the metal oxide 141 is applied to the second electrode 140 by the spray method.
As described above, in the dye-sensitized solar cell 100 in which the metal oxide 141 is applied to the second electrode 140 by the spray method, compared with the case where the metal oxide 141 is applied to the second electrode 140 by the screen method, the second The drop of the metal oxide 141 from the electrode 140 is small, and the difference is particularly remarkable when the elongation exceeds 5%.
In any of the dye-sensitized solar cells 100, no disconnection was observed in the first electrode 130 and the second electrode 140 even when the elongation reached 20%.

110 First film material 120 Second film material 130 First electrode 131 Vertical line 132 Horizontal line 140 Second electrode

Claims (12)

A first film material that is a film material allowed to stretch in a predetermined range;
A second film material that is a transparent or translucent film material, which is allowed to extend in a predetermined range and is arranged at a predetermined interval from the first film material;
Each of them includes a large number of vertical lines and a large number of horizontal lines having electrical conductivity, and is fixed in parallel to the first film material on the surface of the first film material facing the second film material. A first electrode;
A metal oxide having a dye adsorbed on the surface thereof is applied, and all of them face the first film material of the second film material including a plurality of conductive vertical lines and a large number of horizontal lines. A mesh-like second electrode fixed to the surface in parallel with the second film material;
Including an electrolyte that is excited by receiving light to supply electrons to the dye that has emitted electrons supplied from the second electrode to the outside and also receives electrons from the first electrode. Between the first film material and the second film material, the electrolyte solution sealed in a watertight manner so as to be in contact with the first electrode and the second electrode;
A method for constructing a dye-sensitized solar cell that is generally sheet-shaped,
The direction of the dye-sensitized solar cell at the time of construction is selected from the angles formed by the reference line, which is a line along the direction in which tension is applied after construction, and the vertical and horizontal lines in the first electrode. The smaller one is 30 ° to 60 °, and the smaller one of the angles formed by the reference line and the vertical and horizontal lines in the second electrode is 30 ° to 60 °. ,
A method for constructing a dye-sensitized solar cell. Applying the tension in the direction along the reference line to construct the dye-sensitized solar cell,
The construction method of the dye-sensitized solar cell of Claim 1. As the dye-sensitized solar cell, the first film material in the direction along the reference line, and the second film material having a breaking elongation of 3% or more are used.
The construction method of the dye-sensitized solar cell of Claim 1. A first film material that is a film material allowed to stretch in a predetermined range;
A second film material that is a transparent or translucent film material, which is allowed to extend in a predetermined range and is arranged at a predetermined interval from the first film material;
Each of them includes a large number of vertical lines and a large number of horizontal lines having electrical conductivity, and is fixed in parallel to the first film material on the surface of the first film material facing the second film material. A first electrode;
A metal oxide having a dye adsorbed on the surface thereof is applied, and all of them face the first film material of the second film material including a plurality of conductive vertical lines and a large number of horizontal lines. A mesh-like second electrode fixed to the surface in parallel with the second film material;
Including an electrolyte that is excited by receiving light to supply electrons to the dye that has emitted electrons supplied from the second electrode to the outside and also receives electrons from the first electrode. Between the first film material and the second film material, the electrolyte solution sealed in a watertight manner so as to be in contact with the first electrode and the second electrode;
A dye-sensitized solar cell in the form of a rectangular sheet as a whole,
The smaller one of the angles formed by the reference side which is one side of the rectangular shape of the dye-sensitized solar cell and the vertical line and the horizontal line in the first electrode is 30 ° to 60 °, and the reference The smaller one of the angles formed by the side and the vertical and horizontal lines in the second electrode is 30 ° to 60 °.
Dye-sensitized solar cell. The vertical and horizontal lines in the first electrode are orthogonal, and the vertical and horizontal lines in the second electrode are orthogonal.
The dye-sensitized solar cell according to claim 4. The elongation at break of the first film material in the direction along two adjacent sides of the rectangular shape of the dye-sensitized solar cell and the second film material is 3% or more,
The dye-sensitized solar cell according to claim 4. Both the vertical and horizontal lines in the first electrode are fixed to the first film material over substantially the entire length, and the vertical and horizontal lines in the second electrode are both over the substantially entire length. Fixed to two membrane materials,
The dye-sensitized solar cell according to claim 4. The first film material is made of resin or rubber.
The dye-sensitized solar cell according to claim 4. The first membrane material is obtained by coating at least one surface of a membrane substrate that is a woven or knitted fabric formed of fibers with a resin or rubber.
The dye-sensitized solar cell according to claim 4. A mesh-shaped first electrode including a large number of vertical lines and a large number of horizontal lines, all of which are electrically conductive, on one surface of a first film material, which is a film material allowed to stretch in a predetermined range. , The process of fixing in parallel with the first film material,
One surface of the second film material, which is a transparent or translucent film material allowed to elongate within a predetermined range, is coated with a metal oxide having a dye adsorbed on the surface thereof, and both of them are Fixing a mesh-like second electrode including a plurality of conductive vertical lines and a plurality of horizontal lines in parallel with the second film material;
A peripheral portion of the first film material to which the first electrode is fixed and a peripheral portion of the second film material to which the second electrode is fixed; a surface on the side on which the first electrode is fixed; A connection process in which a part of the second electrode is fixed in a state of facing the surface, and a watertight connection is made except for a part thereof;
The first film material and the second film material are not connected in the connection process, and the light is excited in the space between the first film material and the second film material by receiving light. Electrons are supplied to the dye that has emitted electrons supplied from two electrodes to the outside, and an electrolyte containing an electrolyte having a function of receiving electrons from the first electrode is supplied, and then the connection A process of watertightly connecting a portion where the first film material and the second film material are not connected in the process;
including,
A method for producing a dye-sensitized solar cell. In the process of fixing the first electrode to one surface of the first film material, both the vertical and horizontal lines in the first electrode are fixed to the first film material over substantially the entire length thereof,
In the process of fixing the second electrode to one surface of the second film material, both the vertical and horizontal lines in the second electrode are fixed to the second film material over substantially the entire length thereof.
The manufacturing method of the dye-sensitized solar cell of Claim 10. The method further includes the step of applying the solution containing the metal oxide to the second electrode by spraying, then drying the solution, and then firing the second electrode to produce the second electrode.
The manufacturing method of the dye-sensitized solar cell of Claim 11.