JP2011192622A - Dye-sensitized solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive base material for a dye-sensitized solar cell and a transparent conductive material for the dye-sensitized solar cell, having a high corrosion resistance against iodine ions in an electrolyte layer, capable of preventing degradation of a curvature factor and a conversion efficiency of the dye-sensitized solar cell, and capable of attaining a high power generation efficiency, when used as an electrode base material for the dye-sensitized solar cell, and provide a dye-sensitized solar cell and a dye-sensitized solar cell module in which these base material are used. <P>SOLUTION: The conductive base material for a dye-sensitized solar cell has a first metal layer made of metal having a specific resistance of 6x10<SP>-6</SP>Ω m or less and a second metal layer which is formed on the first metal layer and is constituted of one among Ti, Cr, Ni, Mo, Ta, W, Nb, Pt and moreover, has a thickness of 500 nm or less. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a conductive substrate for dye-sensitized solar cells, a transparent conductive substrate for dye-sensitized solar cells, a dye-sensitized solar cell, and a dye-sensitized solar cell module.

  In recent years, environmental problems such as global warming caused by an increase in carbon dioxide have become serious, and countermeasures are being promoted worldwide. In particular, active research and development on solar cells using solar energy as a clean energy source with a low environmental impact is underway. As such solar cells, single crystal silicon solar cells, polycrystalline silicon solar cells, amorphous silicon solar cells, compound semiconductor solar cells and the like have already been put into practical use, but these solar cells have high production costs, etc. There is a problem. Therefore, as a solar cell that has a small environmental load and can reduce the manufacturing cost, a dye-sensitized solar cell has been attracting attention and research and development have been promoted.

  An example of a general configuration of the dye-sensitized solar cell is shown in FIG. As illustrated in FIG. 9, a general dye-sensitized solar cell 100 is formed on a first electrode substrate 111 having a function as an electrode, and the first electrode substrate 111, and the dye-sensitizer. Formed on the oxide semiconductor electrode substrate 110 having the porous layer 112 containing the metal oxide semiconductor fine particles supported thereon, the second electrode base material 121 having a function as an electrode, and the second electrode base material 121 The counter electrode 120 having the formed catalyst layer 122 is disposed so that the porous layer 112 and the catalyst layer 122 face each other, and the electrolyte includes a redox pair between the oxide semiconductor electrode substrate 110 and the counter electrode substrate 120. The layer 103 is formed, and the end of the dye-sensitized solar cell 100 is sealed with the sealant 104. The dye sensitizer adsorbed on the surface of the metal oxide semiconductor fine particles in the porous layer 112 is excited by receiving sunlight from the first electrode substrate 111 side, and the excited electrons are converted into the first electrode group. Conducted to the material 111 and conducted to the second electrode substrate 121 through an external circuit. Thereafter, electricity is generated by returning the electrons to the ground level of the dye sensitizer via the redox couple. In FIG. 9, as the first electrode substrate 111, an electrode substrate in which the transparent electrode layer 111 a is formed on the transparent first substrate 111 b is used, and the second electrode substrate 121 is transparent. In the dye-sensitized solar cell, sunlight is used as the first electrode substrate or the second electrode substrate, in which the transparent electrode layer 121a is formed on the second substrate 121b. Since light is received from one side of the two-electrode base material, any one of the electrode base materials may be a base material having transparency.

  In recent years, there has been an increasing demand for a large area of the above-described dye-sensitized solar cell, and by applying a metal substrate to the electrode layer used for the first electrode substrate or the second electrode substrate, Attempts have been made to increase the electricity extraction efficiency even in large-area devices. However, since an electrolyte containing iodide ions is used for the electrolyte layer of the dye-sensitized solar cell, the electrode layer has excellent corrosion resistance stably against iodide ions for a long period of time. It is necessary to use a metal substrate. Examples of such a metal base material include a titanium base material. However, when the titanium base material is used for an electrode layer of a dye-sensitized solar cell, there is a problem that a manufacturing cost increases.

  Therefore, as a metal substrate used for the electrode layer, an inexpensive metal substrate instead of a titanium substrate is required, but many metal substrates are more resistant to iodide ions than titanium substrates. There was a problem of being inferior.

  Therefore, in order to improve the corrosion resistance against iodide ions, for example, Patent Document 1 discloses that the configuration of the electrode layer used in the dye-sensitized solar cell is a clad material of an aluminum plate and a nickel plate. ing.

  However, in the electrode layer having the configuration described in Patent Document 1, since a nickel plate having a thickness of 1 mm is used, the electrical resistance due to the nickel plate increases, and the curve factor of the dye-sensitized solar cell decreases. There has been a problem that the power generation efficiency of the dye-sensitized solar cell is lowered. Further, for example, even if a vapor phase plating method, a liquid phase plating method, a printing method, or a coating method with excellent productivity is used, it takes a lot of time for materials and manufacturing processes to form a nickel plate with a thickness of 1 mm. Therefore, there has been a problem that the manufacturing cost becomes high. Even if the nickel plate is formed to a thickness of 1 mm by vapor phase plating, liquid phase plating, printing, or coating, the nickel plate is cracked and iodide ions enter from the cracked portion. For this reason, it has been difficult to make the corrosion resistance to the iodide ion sufficient.

JP 2007-87744 A

  The present invention, when used as an electrode substrate of a dye-sensitized solar cell, has high corrosion resistance to iodide ions in the electrolyte layer, and prevents a decrease in conversion efficiency of the dye-sensitized solar cell, Conductive substrate for dye-sensitized solar cell capable of increasing power generation efficiency, transparent conductive substrate for dye-sensitized solar cell, dye-sensitized solar cell using the same, dye-sensitized The main purpose is to provide a solar cell module.

The present invention has been made to solve the above-mentioned problems, and is formed on a first metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, Ti, and Ti. , Cr, Ni, Mo, Ta, W, Nb, Pt, and a second metal layer having a thickness of 500 nm or less, for a dye-sensitized solar cell A conductive substrate is provided.

According to the present invention, by having the second electrode layer, when the conductive substrate for a dye-sensitized solar cell of the present invention is used as an electrode layer of a dye-sensitized solar cell, the iodine in the electrolyte layer It can be made to have high corrosion resistance against fluoride ions.
Moreover, when the electroconductive base material for dye-sensitized solar cells of the present invention is used as an electrode layer of a dye-sensitized solar cell, the second metal layer formed on the first metal layer becomes a thin film. Since it is formed, the electrical resistance due to the second metal layer can be reduced. Furthermore, in the present invention, since the metal of the first metal layer has a small specific resistance, it is possible to reduce the electrical resistance of the entire electrode layer, and to reduce the fill factor of the dye-sensitized solar cell. It is possible to provide a dye-sensitized solar cell with high conversion efficiency.

The present invention comprises a transparent base material, a transparent electrode layer formed on the transparent base material, and a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less formed on the transparent electrode layer in a mesh shape. And a second metal layer formed on the mesh metal layer and made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt and having a thickness of 500 nm or less. A transparent conductive substrate for a dye-sensitized solar cell, comprising: an auxiliary metal layer having a metal layer.

  According to the present invention, since the auxiliary metal layer includes the second metal layer, the auxiliary metal layer can have high corrosion resistance against iodide ions. Thereby, the corrosion resistance with respect to the iodide ion of the whole transparent conductive base material for dye-sensitized solar cells of this invention can be made high. Therefore, it is possible to provide an electrode base material having high corrosion resistance against iodide ions and having transparency. In addition, since the auxiliary metal layer is provided, a dye-sensitized solar cell with high power generation efficiency can be obtained.

The present invention has a first electrode base material having a function as an electrode, and a porous layer containing metal oxide semiconductor fine particles formed on the first electrode base material and carrying a dye sensitizer. An oxide semiconductor electrode substrate and a counter electrode substrate having a second electrode base material having at least a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxidation substrate A dye-sensitized solar cell in which an electrolyte layer including a redox couple is formed between a physical semiconductor electrode substrate and the counter electrode substrate, wherein either the first electrode base material or the second electrode base material Is formed on the first metal layer and a first metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt. It is made of any metal and has a thickness of 500 nm or less Having a dye-sensitized solar cell conductive substrate and a second metal layer as the electrode layer and the other to provide a dye-sensitized solar cell, which is a base material having transparency.

  According to the present invention, either one of the first electrode base material or the second electrode base material has the dye-sensitized solar cell conductive base material as an electrode layer, whereby an iodide in the electrolyte layer is formed. A high-quality dye-sensitized solar cell having high corrosion resistance against ions, little deterioration with time, and high power generation efficiency can be obtained. Moreover, since the dye-sensitized solar cell of the present invention can prevent the reduction of the fill factor, it can have high power generation efficiency.

  In the present invention, it is preferable that the first electrode substrate has the dye-sensitized solar cell conductive substrate as an electrode layer, and the second electrode substrate is a transparent substrate. . This facilitates the movement of electrons between the first metal layer and the porous layer via the second metal layer, so that the dye-sensitized solar cell of the present invention has higher power generation efficiency. Because it is possible to do.

The present invention has a first electrode base material having a function as an electrode, and a porous layer containing metal oxide semiconductor fine particles formed on the first electrode base material and carrying a dye sensitizer. An oxide semiconductor electrode substrate and a counter electrode substrate having a second electrode base material having at least a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxidation substrate A dye-sensitized solar cell in which an electrolyte layer including a redox pair is formed between a physical semiconductor electrode substrate and the counter electrode substrate, wherein at least one of the first electrode substrate and the second electrode substrate is , A transparent substrate, a transparent electrode layer formed on the transparent substrate, and a mesh formed of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less formed on the transparent electrode layer in a mesh shape. Metal layer and shape on mesh metal layer A dye-sensitized type comprising: an auxiliary metal layer having a second metal layer made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt and having a thickness of 500 nm or less Provided is a dye-sensitized solar cell, which is a transparent conductive substrate for a solar cell.

  According to the present invention, at least one of the first electrode base material or the second electrode base material is the transparent conductive base material for dye-sensitized solar cells, thereby preventing iodide ions in the electrolyte layer. A high-quality dye-sensitized solar cell with high corrosion resistance, little deterioration with time, and high power generation efficiency can be obtained. Moreover, since the dye-sensitized solar cell of the present invention can prevent a decrease in the fill factor of the dye-sensitized solar cell, it can be a dye-sensitized solar cell with high power generation efficiency.

  In the present invention, the first electrode base material is preferably the transparent conductive base material for dye-sensitized solar cells. This facilitates the movement of electrons between the mesh metal layer and the porous layer through the second metal layer, so that the dye-sensitized solar cell of the present invention has higher power generation efficiency. can do.

The present invention has a first electrode base material having a function as an electrode, and a porous layer containing metal oxide semiconductor fine particles formed on the first electrode base material and carrying a dye sensitizer. An oxide semiconductor electrode substrate and a counter electrode substrate having at least a second electrode base material having a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxide semiconductor An electrolyte layer including an oxidation-reduction pair is formed between the electrode substrate and the counter electrode substrate, and the specific resistance of either the first electrode base material or the second electrode base material is 6 × 10 ⁻⁶ Ω. A first metal layer made of a metal of m or less, and formed on the first metal layer, made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt, and having a thickness of Dye-sensitized type having a second metal layer of 500 nm or less Provided is a dye-sensitized solar cell module comprising a plurality of dye-sensitized solar cells, each having a positive electrode conductive substrate as an electrode layer and the other being a transparent substrate. To do.

  According to the present invention, since the dye-sensitized solar cell is included, the dye-sensitized solar cell module of the present invention can have high power generation efficiency.

The present invention has a first electrode base material having a function as an electrode, and a porous layer containing metal oxide semiconductor fine particles formed on the first electrode base material and carrying a dye sensitizer. An oxide semiconductor electrode substrate and a counter electrode substrate having at least a second electrode base material having a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxide semiconductor An electrolyte layer including an oxidation-reduction pair is formed between the electrode substrate and the counter electrode substrate, and at least one of the first electrode base material or the second electrode base material is a transparent base material and the transparent base material A transparent electrode layer formed on the transparent electrode layer, a mesh-like metal layer formed on the transparent electrode layer and having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and the mesh-like metal layer Formed, Ti, Cr, Ni, Mo, A dye, which is a transparent conductive substrate for a dye-sensitized solar cell, comprising a metal of Ta, W, Nb, or Pt and having an auxiliary metal layer having a second metal layer having a thickness of 500 nm or less Provided is a dye-sensitized solar cell module comprising a plurality of sensitized solar cells connected together.

  According to the present invention, since the dye-sensitized solar cell is included, the dye-sensitized solar cell module of the present invention can have high power generation efficiency.

  According to the present invention, by providing a conductive substrate for a dye-sensitized solar cell having the first metal layer and the second metal layer, resistance to iodide ions in the electrolyte layer of the dye-sensitized solar cell is improved. A dye-sensitized solar cell that is highly corrosive and has little deterioration over time can be provided. In addition, since the conductive substrate for dye-sensitized solar cells has a low electrical resistance, when used in a dye-sensitized solar cell, the decrease in the fill factor is prevented, and the dye sensitization with high power generation efficiency is performed. It can be set as a sensitive solar cell.

It is a schematic sectional drawing which shows an example of the electrically conductive base material for dye-sensitized solar cells of this invention. It is a schematic sectional drawing which shows an example of the transparent conductive base material for dye-sensitized solar cells of this invention. It is a schematic sectional drawing which shows an example of the dye-sensitized solar cell of this invention. It is a schematic sectional drawing which shows another example of the dye-sensitized solar cell of this invention. It is a schematic sectional drawing which shows another example of the dye-sensitized solar cell of this invention. It is a schematic sectional drawing which shows another example of the dye-sensitized solar cell of this invention. It is a schematic sectional drawing which shows an example of the dye-sensitized solar cell module of this invention. It is a schematic sectional drawing which shows another example of the dye-sensitized solar cell module of this invention. It is a schematic sectional drawing which shows an example of a dye-sensitized solar cell.

  Hereinafter, the conductive substrate for dye-sensitized solar cell, the transparent conductive substrate for dye-sensitized solar cell, the dye-sensitized solar cell, and the dye-sensitized solar cell module of the present invention will be described respectively.

A. First, the conductive substrate for a dye-sensitized solar cell of the present invention will be described.
The conductive substrate for a dye-sensitized solar cell of the present invention (hereinafter, simply referred to as a conductive substrate in this section) is made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less. A first metal layer, and a second metal formed on the first metal layer, made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt, and having a thickness of 500 nm or less And a layer.

Here, the conductive substrate of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an example of a conductive substrate of the present invention. As shown in FIG. 1, the conductive base material 1 of the present invention is formed on a first metal layer 1b made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, a first metal layer 1b, and Ti , Cr, Ni, Mo, Ta, W, Nb, and Pt, and the second metal layer 1a having a thickness of 500 nm or less.

According to the present invention, since the conductive substrate of the present invention has the first metal layer and the second metal layer, the conductive substrate is used as an electrode layer of an electrode substrate of a dye-sensitized solar cell. In addition, it is possible to have high corrosion resistance against iodide ions in the electrolyte layer. Further, since the metal of the first metal layer has a low specific resistance, and the second metal layer is formed in a thin film, the electrical resistance of the entire conductive base material is reduced. can do. Therefore, by using a conductive substrate having a low electrical resistance as an electrode layer of a dye-sensitized solar cell, a decrease in the fill factor of the dye-sensitized solar cell is prevented, and a dye-sensitized solar cell with high power generation efficiency is obtained. It becomes possible to provide.
Furthermore, according to the present invention, since the second metal layer can be manufactured by a vapor phase plating method, a liquid phase plating method, a printing method, or a coating method with excellent productivity, a low-cost dye-sensitized solar cell. A conductive base material can be obtained.

  Hereinafter, the second metal layer and the first metal layer used in the present invention will be described.

1. 2nd metal layer The 2nd metal layer used for this invention is formed on the 1st metal layer mentioned later, and is any metal of Ti, Cr, Ni, Mo, Ta, W, Nb, Pt And having a thickness of 500 nm or less.

  Here, “any metal of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt” means a range of 70% by mass to 100% by mass with any of the components listed above as a mass ratio. Among them, it is preferably contained within a range of 80% by mass to 100% by mass, particularly preferably within a range of 90% by mass to 100% by mass, and includes a metal composed of a single element or an alloy.

  In particular, the second metal layer is preferably made of Ti or Cr, and more preferably made of Cr. This is because Cr has high adhesion to the first metal layer, which will be described later, and thus the second metal layer can be formed thinner on the first metal layer.

Here, the thickness of the second metal layer that exhibits sufficient corrosion resistance against iodide ions and that can be satisfactorily extracted by the first metal layer may be 500 nm or less, In particular, it is preferably in the range of 1 nm to 250 nm, particularly in the range of 10 nm to 50 nm. When the thickness of the second metal layer exceeds 500 nm, the electric resistance due to the second metal layer is increased. Therefore, when the conductive substrate is used as an electrode layer of a dye-sensitized solar cell, It becomes difficult to make the extraction efficiency sufficient. Further, there is a possibility that cracking may occur during the production and use of the second metal layer, and it may be difficult to make the corrosion resistance against iodide ions sufficient.
The lower limit of the thickness of the second metal layer is about 1 nm. This is because if the thickness of the second metal layer is less than 1 nm, it may be difficult to form the second metal layer on the first metal layer described later.

  The method for forming the second metal layer is not particularly limited as long as it can be formed on the first metal layer described later with a thickness of 500 nm or less. For example, sputtering, ion plating, Vapor phase plating methods such as vacuum vapor deposition and chemical vapor deposition, liquid phase plating (electrolytic plating, electroless plating, etc.), printing methods, and coating methods are preferred. This is because these methods are excellent in productivity.

2. First Metal Layer The first metal layer used in the present invention is made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less.
Here, "specific resistance 6 × 10 ^-6 Ω · m or less of the metal", metals and the specific resistance consists of a single element of the following 6 × 10 ^-6 Ω · m, a specific resistance of 6 × 10 ^- Including alloys of ⁶ Ω · m or less.

  The first metal layer is not particularly limited as long as it can be used as an electrode substrate of a dye-sensitized solar cell by forming the second metal layer, and has flexibility. It may be present or may not have flexibility, but preferably has flexibility. When the first metal layer has flexibility, it is possible to impart flexibility to the conductive base material of the present invention. In addition, since the conductive substrate is used for an electrode substrate of a dye-sensitized solar cell, flexibility can be imparted to the dye-sensitized solar cell, and the processability is excellent. Is possible.

  Here, the flexibility of the first metal layer refers to bending when a force of 5 KN is applied according to the metal material bending test method of JIS Z 2248.

  As such a 1st metal layer, it may consist only of the metal layer using the metal mentioned above, and the said metal layer may be formed on the base material, but the said metal More preferably, the first metal layer is preferably a metal foil. This is because when the first metal layer is a metal foil, it is easy to prepare the first metal layer, and a conductive base material can be obtained at low cost.

  The thickness of the metal foil is preferably in the range of 5 μm to 300 μm, more preferably in the range of 10 μm to 200 μm, and particularly preferably in the range of 15 μm to 100 μm. When the thickness of the metal foil exceeds the above range, it is difficult to impart flexibility to the conductive substrate of the present invention. When the thickness of the metal foil is less than the above range, This is because it becomes difficult to form a metal layer to form a conductive substrate.

Examples of the metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less and available at a relatively low cost include Al, stainless steel, Cu, Ag, and Ni. In view of heat resistance and the like, it is more preferable to use Al or stainless steel. Al and stainless steel are also preferable because they have a certain degree of corrosion resistance against iodide ions among the materials described above.
The term “heat resistance” as used herein refers to not exhibiting deformation, alteration, or the like with respect to the temperature applied when the porous layer is baked and formed on the conductive substrate.

B. Next, the transparent conductive substrate for dye-sensitized solar cells of the present invention (hereinafter, sometimes simply referred to as a transparent conductive substrate) will be described.
The transparent conductive substrate of the present invention is formed of a transparent substrate, a transparent electrode layer formed on the transparent substrate, and a mesh on the transparent electrode layer, and has a specific resistance of 6 × 10 ⁻⁶ Ω. A mesh-like metal layer made of metal of m or less, and formed on the mesh-like metal layer, made of any metal of Ti, Cr, Ni, Mo, Ta, W, Nb, Pt, and having a thickness And an auxiliary metal layer having a second metal layer of 500 nm or less.

  Here, as the transparency of the transparent conductive substrate of the present invention, when the transparent conductive substrate of the present invention is used as an electrode substrate of a dye-sensitized solar cell, the transmittance of light having a wavelength of 400 nm to 800 nm. Is preferably 70% or more, and more preferably 80% or more.

  In addition, the transparency of the said transparent conductive base material is the value measured by the measuring method based on JISK7361-1: 1997.

Next, the transparent conductive substrate of the present invention will be described with reference to the drawings.
FIG. 2 is a schematic sectional view showing an example of the transparent conductive substrate of the present invention. As shown in FIG. 2, the transparent conductive substrate 2 of the present invention is formed in a mesh shape on the transparent substrate 2b, the transparent electrode layer 2a formed on the transparent substrate 2b, and the transparent electrode layer 2a. , Formed on the mesh-like metal layer 2c made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and Ti, Cr, Ni, Mo, Ta, W, Nb, Pt And an auxiliary metal layer having the second metal layer 2d made of any metal and having a thickness of 500 nm or less.

  According to the present invention, since the auxiliary metal layer has the mesh metal layer and the second metal layer, the auxiliary metal layer can have high corrosion resistance against iodide ions in the electrolyte layer. In addition, since the mesh metal layer is made of a metal having a low specific resistance and the second metal layer is formed as a thin film, the electric resistance of the entire auxiliary metal layer can be reduced. Therefore, since the electric extraction efficiency of the transparent electrode layer can be improved by the auxiliary metal layer, it is possible to provide a dye-sensitized solar cell with high power generation. Hereinafter, each member used for the transparent conductive substrate of the present invention will be described.

1. Auxiliary Metal Layer The auxiliary metal layer used in the present invention is formed in a mesh shape, and is formed on the mesh metal layer made of metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and the mesh metal layer. , Ti, Cr, Ni, Mo, Ta, W, Nb, Pt, and a second metal layer having a thickness of 500 nm or less. The second metal layer can be the same as that described in the section “A. Conductive base material for dye-sensitized solar cell”, and the description thereof is omitted here. Hereinafter, the mesh metal layer will be described.

The mesh-like metal layer used in the present invention is formed on a transparent electrode layer to be described later, is made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and is formed in a mesh shape. Is.

  Examples of the mesh shape of the mesh metal layer include a triangular lattice shape, a parallelogram lattice shape, and a hexagonal lattice shape.

  The thickness of the mesh metal layer is preferably in the range of 0.01 μm to 10 μm. When the thickness of the mesh metal layer exceeds the above range, it takes a lot of materials, time, etc. for forming the mesh metal layer, which may reduce the production efficiency or increase the production cost. is there. Moreover, it is because the function of the transparent electrode layer mentioned later may not be able to be improved when the thickness of the said mesh-shaped metal layer is less than the said range.

  The ratio of the openings of the mesh metal layer used in the present invention is preferably in the range of 50% to 99.9%. This is because, when the ratio of the openings of the mesh-like metal layer is less than the above range, the transparent conductive base material cannot sufficiently receive sunlight, and thus power generation efficiency may be lowered. Moreover, it is because it may become difficult to improve the function of a transparent electrode layer, even if it uses the said mesh-like metal layer when the ratio of the opening part of the said mesh-like metal layer exceeds the said range.

  Further, the line width of the mesh metal layer and the mesh pitch are appropriately selected according to the shape of the dye-sensitized solar cell to be used, but as the line width of the mesh metal layer, It is preferably in the range of 0.02 μm to 10 mm, in particular in the range of 1 μm to 2 mm, in particular in the range of 10 μm to 1 mm, and the mesh pitch of the mesh metal layer is in the range of 1 μm to 500 μm. However, it is preferably in the range of 5 μm to 100 μm, particularly in the range of 10 μm to 50 μm.

The “metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less” used for the mesh metal layer is the same as that described in the section “A. Conductive substrate for dye-sensitized solar cell”. The explanation here is omitted.

  As a method for forming such a mesh metal layer, a metal mask is used to form the mesh metal layer using a vapor phase plating method, or a thin film made of the metal is formed on the entire surface of the transparent electrode layer. Examples thereof include a method of etching into a predetermined pattern, a method of using the metal as a metal paste, and printing the metal paste on a transparent substrate or a transparent electrode layer.

2. Transparent base material As a transparent base material used for this invention, an inorganic transparent base material and resin-made base materials can be used, for example. Among these, the resin base is preferable because it is lightweight, has excellent processability, and can reduce manufacturing costs.

  As the resin substrate, for example, a polyethylene terephthalate film (PET), a polyester naphthalate film (PEN), or a polycarbonate film (PC) is preferably used.

  Examples of the inorganic transparent substrate include a synthetic quartz substrate and a glass substrate.

  The thickness of the transparent substrate used in the present invention can be appropriately selected according to the use of the dye-sensitized solar cell, and is usually within a range of 10 μm to 2000 μm. In particular, it is preferably in the range of 50 μm to 1800 μm, more preferably in the range of 100 μm to 1500 μm.

3. Transparent electrode layer The transparent electrode layer used in the present invention is not particularly limited as long as it has transparency and predetermined conductivity. Examples of the material used for such a transparent electrode layer include metal oxides and conductive polymer compound materials.

Examples of the metal oxide include SnO ₂ , ZnO, a compound obtained by adding SnO ₂ to indium oxide (ITO), fluorine-doped SnO ₂ (FTO), and a compound obtained by adding ZnO to indium oxide (IZO). be able to.
On the other hand, examples of the conductive polymer compound material include polythiophene, polyethylene sulfonic acid (PSS), polyaniline (PA), polypyrrole, and polyethylenedioxythiophene (PEDOT). Moreover, these can also be used in mixture of 2 or more types.

  The transparent electrode layer used in the present invention may be composed of a single layer or may be composed of a plurality of layers laminated. Examples of the configuration in which a plurality of layers are stacked include a mode in which layers made of materials having different work functions are stacked, and a mode in which layers made of different metal oxides are stacked.

The thickness of the transparent electrode layer used in the present invention is usually preferably in the range of 5 nm to 2000 nm, and particularly preferably in the range of 10 nm to 1000 nm. If the thickness is thicker than the above range, it may be difficult to form a homogeneous transparent electrode layer, or the total light transmittance may be lowered and it may be difficult to obtain good photoelectric conversion efficiency. If the thickness is thinner than the above range, the conductivity of the transparent electrode layer may be insufficient.
In addition, the said thickness shall point out the total thickness which totaled the thickness of all the layers, when a transparent electrode layer is comprised from a several layer.

  Since the method for forming the transparent electrode layer on the transparent substrate can be the same as a general method for forming an electrode layer, description thereof is omitted here.

C. Next, the dye-sensitized solar cell of the present invention will be described.
The dye-sensitized solar cell of the present invention is roughly classified into two embodiments according to the configuration of the electrode substrate. Each embodiment will be described below.

I. Dye-sensitized solar cell according to the first embodiment The dye-sensitized solar cell according to the present embodiment is formed on a first electrode base material having a function as an electrode and the first electrode base material. An oxide semiconductor electrode substrate having a porous layer containing metal oxide semiconductor fine particles carrying a sensitizer and a counter electrode substrate having a second electrode base material having at least a function as an electrode are the porous layer. And a dye-sensitized solar cell in which an electrolyte layer including a redox pair is formed between the oxide semiconductor electrode substrate and the counter electrode substrate. Then, either the first electrode base material or the second electrode base material has a first metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and the first metal layer. Formed, Ti, Cr, Ni, Mo, Ta, W, Nb, Pt A conductive substrate for a dye-sensitized solar cell (hereinafter, referred to simply as a conductive substrate in this section), which has a second metal layer having a thickness of 500 nm or less. .) As an electrode layer, and the other is a transparent substrate.

  According to this embodiment, any one of the first electrode base material or the second electrode base material has the conductive base material as an electrode layer, whereby corrosion resistance to iodide ions in the electrolyte layer is achieved. Therefore, it is possible to obtain a high-quality dye-sensitized solar cell with little deterioration over time of the electrode layer. Moreover, since the said electrically conductive base material is a thing with small electrical resistance, it is possible to prevent the fall of the curve factor of a dye-sensitized solar cell.

  Here, the fill factor of the dye-sensitized solar cell is a value indicating the performance of the dye-sensitized solar cell. The smaller the internal electrical resistance of the dye-sensitized solar cell, the more the fill factor is The larger the value and the larger the internal electric resistance of the dye-sensitized solar cell, the smaller the curve factor. In the dye-sensitized solar cell, the power generation efficiency can be increased by increasing the curve factor.

  In this embodiment, when the first electrode substrate or the second electrode substrate has a conductive substrate having a small electric resistance as an electrode layer, the internal electric resistance of the dye-sensitized solar cell is a small value. Therefore, it is possible to increase the curve factor of the dye-sensitized solar cell and increase the power generation efficiency.

In addition, the fill factor in the dye-sensitized solar cell of the present invention can be obtained by measuring the current-voltage characteristics of the dye-sensitized solar cell.
The current-voltage characteristics of the dye-sensitized solar cell are, for example, AM1.5, pseudo-sunlight (incident light intensity 100 mW / cm ² ) as a light source, and a dye-sensitized dye using a source measure unit (Keutley 2400 type). It can be measured by applying a voltage to the solar cell.

  Specifically, as the dye-sensitized solar cell of this embodiment, the first electrode substrate has the conductive substrate as an electrode layer, and the second electrode substrate has transparency. An embodiment (hereinafter referred to as a first embodiment) that is a base material having the above-described structure, the second electrode base material having the conductive base material as an electrode layer, and the first electrode base material having transparency. There can be mentioned two aspects: an aspect (hereinafter referred to as a second aspect) which is a base material having the same. Each aspect will be described below.

1. Dye-sensitized solar cell according to the first aspect In the dye-sensitized solar cell according to the present aspect, the first electrode base material includes the conductive base material as an electrode layer, and the second electrode base material includes the second electrode base material. It is a substrate having transparency.

The dye-sensitized solar cell of this embodiment will be described with reference to the drawings.
FIG. 3 is a schematic cross-sectional view showing an example of the dye-sensitized solar cell of this embodiment. As shown in FIG. 3, the dye-sensitized solar cell 100 of this embodiment is formed on a first electrode substrate 111 having the conductive substrate 1 as an electrode layer, and the first electrode substrate 111, and is dye-sensitized. Oxide semiconductor electrode substrate 110 having a porous layer 112 containing metal oxide semiconductor fine particles carrying an agent, a second electrode substrate 121 having a transparent substrate 121b and a transparent electrode layer 121a, and a transparent electrode layer The counter electrode substrate 120 having the catalyst layer 122 formed on 121a is disposed so that the porous layer 112 and the catalyst layer 122 face each other, and the oxidation-reduction is performed between the oxide semiconductor electrode substrate 110 and the counter electrode substrate 120. An electrolyte layer 103 including a pair is formed. In addition, the conductive substrate 1 is formed on the first metal layer 1b made of a metal of 6 × 10 ⁻⁶ Ω · m or less, and the first metal layer 1b, and Ti, Cr, Ni, Mo, Ta, W, It has the 2nd metal layer 1a which consists of a metal of Nb and Pt, and whose thickness is 500 nm or less.
Moreover, as shown in FIG. 3, the edge part of the dye-sensitized solar cell 100 is normally sealed using the sealing agent 104 grade | etc.,.

In the dye-sensitized solar cell of this aspect, the first electrode base material has the conductive base material as an electrode layer, whereby the power generation efficiency of the dye-sensitized solar cell can be further increased. Become. The reason for this is not clear, but is estimated as follows.
When only the first metal layer is used as the first electrode substrate, there is a large difference in energy level between the first metal layer and the porous layer containing metal oxide semiconductor fine particles. It is conceivable that electrons hardly move between the material and the porous layer.
On the other hand, when the conductive substrate is used as the first electrode substrate, the second metal layer is present between the first metal layer and the porous layer, so that the first metal layer and the porous layer Since the difference in energy level can be filled, it is considered that electrons easily move between the first metal layer and the porous layer through the second metal layer. Therefore, since the electricity extraction efficiency in the first metal layer can be increased, it is considered that the power generation efficiency of the dye-sensitized solar cell can be further increased.

  Hereinafter, each member used for the dye-sensitized solar cell of this embodiment will be described.

(1) Oxide Semiconductor Electrode Substrate The oxide semiconductor electrode substrate used in this embodiment is formed on the first electrode base material having a function as an electrode and the first electrode base material, and the dye sensitizer is It has a porous layer containing the supported metal oxide semiconductor fine particles. Hereinafter, the 1st electrode base material and porous layer which are used for this mode are explained, respectively.

(A) 1st electrode base material The 1st electrode base material used for this aspect has a conductive base material as an electrode layer. The conductive base material can be the same as that described in the section “A. Conductive base material for dye-sensitized solar cell”, and a description thereof will be omitted here.

(B) Porous layer Next, the porous layer used in this embodiment will be described. The porous layer used in this embodiment contains metal oxide semiconductor fine particles carrying a dye sensitizer, and is formed on the first electrode substrate described above, and an electrolyte layer described later. It touches. The dye sensitizer is supported on the surface of the metal oxide semiconductor fine particles.
Hereinafter, the metal oxide semiconductor fine particles and the dye sensitizer used in the porous layer will be described.

(I) Metal oxide semiconductor fine particles The metal oxide semiconductor fine particles used in this embodiment are not particularly limited as long as they are made of a metal oxide having semiconductor characteristics. Examples of the metal oxide constituting the metal oxide semiconductor fine particles used in this embodiment include TiO ₂ , ZnO, SnO ₂ , ITO, ZrO ₂ , MgO, Al ₂ O ₃ , CeO ₂ , Bi ₂ O ₃ , and Mn. ₃ O ₄ , Y ₂ O ₃ , WO ₃ , Ta ₂ O ₅ , Nb ₂ O ₅ , La ₂ O _{3 and the} like can be mentioned.

Among these, in this embodiment, it is most preferable to use metal oxide semiconductor fine particles made of TiO ₂ . This is because TiO ₂ is particularly excellent in semiconductor characteristics.

  The average particle size of the metal oxide semiconductor fine particles used in this embodiment is usually preferably in the range of 1 nm to 10 μm, and particularly preferably in the range of 10 nm to 1000 nm.

(Ii) Dye sensitizer The dye sensitizer used in the present embodiment is not particularly limited as long as it can absorb light and generate an electromotive force. Examples of such a dye sensitizer include organic dyes and metal complex dyes. Examples of the organic dyes include acridine, azo, indigo, quinone, coumarin, merocyanine, phenylxanthene, indoline, and carbazole dyes. In this embodiment, among these organic dyes, it is preferable to use indoline or carbazole dyes. Further, as the metal complex dye, it is preferable to use a ruthenium dye, and it is particularly preferable to use a ruthenium bipyridine dye and a ruthenium terpyridine dye which are ruthenium complexes. This is because such a ruthenium complex has a wide wavelength range of light to be absorbed, so that the wavelength range of light that can be photoelectrically converted can be greatly expanded.

(Iii) Arbitrary component The porous layer used in this embodiment may contain an arbitrary component in addition to the metal oxide semiconductor fine particles. As an arbitrary component used for this aspect, resin can be mentioned, for example. It is because the brittleness of the porous layer used in this embodiment can be improved by containing the resin in the porous layer.
Examples of such a resin include polyvinyl pyrrolidone, ethyl cellulose, caprolactan, and the like.

(Iv) Others The thickness of the porous layer used in this embodiment is usually preferably in the range of 1 μm to 100 μm, and particularly preferably in the range of 3 μm to 30 μm.

(2) Counter Electrode Substrate Next, the counter electrode substrate used in this embodiment will be described.
The counter electrode substrate used in this embodiment has a second electrode base material having at least a function as an electrode. Hereinafter, the second electrode substrate will be described.

(A) 2nd electrode base material The 2nd electrode base material used for this aspect is a base material which has transparency.

  Such a substrate having transparency usually has a transparent substrate and a transparent electrode layer formed on the transparent substrate. About the said transparent base material and a transparent electrode layer, since it can be made to be the same as that of what was demonstrated in the term of "B. The transparent conductive base material for dye-sensitized solar cells", description here is abbreviate | omitted.

  As described above, the second electrode substrate in the present embodiment is not particularly limited as long as it has the transparent substrate and the transparent electrode layer described above, and a necessary configuration can be selected and added. . An example of such a configuration is an auxiliary electrode layer.

  The auxiliary electrode layer is an electrode layer formed in a mesh shape using a conductive material. By using the auxiliary electrode layer together with the transparent electrode layer described above, the power generation efficiency of the dye-sensitized solar cell of this embodiment can be increased.

  The formation position of the auxiliary electrode layer used in this embodiment is particularly limited as long as it can be used together with the transparent electrode layer to increase the power generation efficiency of the dye-sensitized solar cell of this embodiment. Instead, it may be formed on the transparent electrode layer formed on the transparent substrate, or may be formed between the transparent substrate and the transparent electrode layer. In this aspect, the auxiliary electrode layer is more preferably formed between the transparent substrate and the transparent electrode layer. This is because, compared with the case where the auxiliary electrode layer is formed on the transparent electrode layer formed on the transparent base material, it is difficult to come into contact with iodide ions in the electrolyte layer.

The material for the auxiliary electrode layer used in this embodiment is not particularly limited as long as it is a material that can increase the power generation efficiency of the dye-sensitized solar cell of this embodiment.
In this embodiment, even if the auxiliary electrode layer is formed on the transparent substrate and further the transparent electrode layer is formed, iodide ions contained in the electrolyte layer described later are used for the transparent electrode layer. Since it partially permeates and comes into contact with the auxiliary electrode layer, the auxiliary electrode layer preferably has corrosion resistance against iodide ions.
Specific examples of the material used for such an auxiliary electrode layer include titanium, tungsten, molybdenum, chromium, and platinum. However, any metal that has been subjected to a corrosion-resistant surface treatment using plating or the like may be used. For example, common metal species such as aluminum, nickel, copper, iron, silver, and alloys thereof can be used.

  Since the method for forming such an auxiliary electrode layer can be the same as the method for forming the mesh-like metal layer described in the above-mentioned section “B. Transparent conductive substrate for dye-sensitized solar cell”. Explanation here is omitted.

  Regarding the shape of the mesh of the auxiliary electrode layer used in this embodiment, the ratio of the openings of the auxiliary electrode layer, the mesh pitch and the line width, etc., the above-mentioned “B. Transparent conductive substrate for dye-sensitized solar cell” Since it can be the same as that described in the section of the mesh-like metal layer, description thereof is omitted here.

  The 2nd electrode base material used for this aspect can select and add a required member besides the said auxiliary electrode layer.

  In addition to the transparent substrate described above, the second electrode substrate used in this embodiment includes the dye described in “B. Transparent conductive substrate for dye-sensitized solar cell”. A transparent conductive substrate for sensitized solar cells can be used.

(B) Other members The counter electrode substrate used in this embodiment is not particularly limited as long as it has at least the second electrode base material, and necessary members can be appropriately added. An example of such a member is a catalyst layer.

  By forming the catalyst layer on the second electrode substrate, the dye-sensitized solar cell of this embodiment can be made more excellent in power generation efficiency. Examples of such a catalyst layer include, for example, an embodiment in which Pt is vapor-deposited on the second electrode substrate, polyethylene dioxythiophene (PEDOT), polystyrene sulfonic acid (PSS), polyaniline (PA), paratoluene sulfone. Although the aspect which forms a catalyst layer from an acid (PTS) and these mixtures can be mentioned, it is not this limitation.

  The thickness of such a catalyst layer is preferably in the range of 1 nm to 10 μm, more preferably in the range of 10 nm to 1000 nm, and particularly preferably in the range of 10 nm to 500 nm.

(3) Electrolyte layer The electrolyte layer used in this embodiment is formed between the oxide semiconductor electrode substrate and the counter electrode substrate, and includes an oxidation-reduction pair.

The redox couple used for the electrolyte layer in this embodiment is a combination of iodine and iodide. The combination of such iodine and iodide, for example, can be cited LiI, NaI, KI, and metal iodide such as CaI _2, a combination of _{I 2.}

  The electrolyte layer in this embodiment may contain additives such as a crosslinking agent, a photopolymerization initiator, a thickener, and a room temperature molten salt as other compounds other than the redox couple.

  The electrolyte layer used in this embodiment may be an electrolyte layer having any form of gel, solid or liquid.

(4) Other members The dye-sensitized solar cell of the present embodiment is not particularly limited as long as it has the above-described oxide semiconductor electrode substrate, counter electrode substrate, and electrolyte layer. Can be added. Examples of such a member include a sealing agent used for sealing an end portion of the dye-sensitized solar cell.

2. Next, the dye-sensitized solar cell of the second embodiment will be described.
In the dye-sensitized solar cell of this embodiment, the second electrode base material has the conductive base material as an electrode layer, and the first electrode base material is a transparent base material.

The dye-sensitized solar cell of this embodiment will be described with reference to the drawings.
FIG. 4 is a schematic cross-sectional view showing an example of the dye-sensitized solar cell of this embodiment. As shown in FIG. 4, the dye-sensitized solar cell 100 of this embodiment includes a transparent base layer 111b, a first electrode base 111 having a transparent electrode layer 111a formed on the transparent base 111b, and a transparent electrode layer. An oxide semiconductor electrode substrate 110 having a porous layer 112 containing metal oxide semiconductor fine particles formed on 111a and carrying a dye sensitizer, and a second electrode substrate having the conductive substrate 1 as an electrode layer The counter electrode substrate 121 is disposed so that the porous layer 112 and the second electrode base material 121 face each other, and an electrolyte layer 103 including a redox pair is provided between the oxide semiconductor electrode substrate 110 and the counter electrode substrate. Is formed. The conductive substrate 1 is formed on the first metal layer 1b made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and the first metal layer 1b. Ti, Cr, Ni, Mo, Ta , W, Nb, and Pt, and has a second metal layer 1a having a thickness of 500 nm or less. The porous layer 112 is disposed so as to face the second metal layer 1a.
Moreover, as shown in FIG. 4, the edge part of the dye-sensitized solar cell 100 is normally sealed using the sealing agent 104 grade | etc.,.

The electrolyte layer and other members used in this embodiment can be the same as those described in the section of “1. Dye-sensitized solar cell of the first embodiment”, so description thereof is omitted here. .
Hereinafter, each of the oxide semiconductor electrode substrate and the counter electrode substrate used in this embodiment will be described.

(1) Counter electrode substrate The counter electrode substrate used in this embodiment has at least a second electrode base material.
Moreover, in this aspect, the second electrode substrate has a conductive substrate as an electrode layer. The conductive base material is the same as that described in the section “A. Conductive base material for dye-sensitized solar cell”, and the description thereof is omitted here.

  Moreover, in this aspect, since the 2nd metal layer formed in the said electrically conductive base material has the same effect as a catalyst layer, it is not necessary to form a separate catalyst layer in the said electrically conductive base material. However, it may be provided to further improve the power generation efficiency. The catalyst layer can be the same as that described in the section “1. Dye-sensitized solar cell of the first aspect”, and thus the description thereof is omitted here.

(2) Oxide Semiconductor Electrode Substrate The oxide semiconductor electrode substrate used in this aspect is formed on a first electrode base material having a function as an electrode and the first electrode base material, and a dye sensitizer is loaded on the surface. It has a porous layer containing the held metal oxide semiconductor fine particles. In this embodiment, a transparent substrate is used as the first electrode substrate.

  About the base material which has the said transparency, since it can be the same as that of what was demonstrated in the term of "1. Dye-sensitized solar cell of 1st aspect", description here is abbreviate | omitted. Further, as the first electrode base material, the transparent conductive base material for dye-sensitized solar cell described in “B. Transparent conductive base material for dye-sensitized solar cell” can be used.

  Further, the porous layer used in this embodiment can be the same as that described in the section “1. Dye-sensitized solar cell of the first embodiment”, and thus the description thereof is omitted here.

3. Others As the dye-sensitized solar cell of the present embodiment, the dye-sensitized solar cell of the first embodiment among the dye-sensitized solar cell of the first embodiment and the dye-sensitized solar cell of the second embodiment described above. A solar cell is more preferable. This is because the dye-sensitized solar cell of the first aspect is superior in power generation efficiency.

II. Dye-sensitized solar cell according to the second embodiment The dye-sensitized solar cell according to the present embodiment is formed on the first electrode base material having a function as an electrode and the first electrode base material. An oxide semiconductor electrode substrate having a porous layer containing metal oxide semiconductor fine particles carrying a sensitizer and a counter electrode substrate having a second electrode base material having at least a function as an electrode are the porous layer. And a dye-sensitized solar cell in which an electrolyte layer including a redox pair is formed between the oxide semiconductor electrode substrate and the counter electrode substrate. And at least one of the first electrode substrate and the second electrode substrate is formed in a mesh shape on the transparent substrate, the transparent electrode layer formed on the transparent substrate, and the transparent electrode layer. a specific resistance of 6 × ^{10 -6} Ω · m or less of the metal And a mesh-like metal layer formed on the mesh-like metal layer and made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt and having a thickness of 500 nm or less. It is a transparent conductive substrate for dye-sensitized solar cells having an auxiliary metal layer having two metal layers (hereinafter, it may be simply referred to as a transparent conductive substrate in this section). To do.

According to this embodiment, when at least one of the first electrode substrate or the second electrode substrate is the transparent conductive substrate, the corrosion resistance to iodide ions in the electrolyte layer is high, It is possible to prevent a decrease in the fill factor of the dye-sensitized solar cell and to obtain a high-quality dye-sensitized solar cell with high power generation efficiency.
The fill factor in the dye-sensitized solar cell of the present embodiment can be the same as that described in the section “I. Dye-sensitized solar cell of the first embodiment”, and is therefore described here. Is omitted.

  Specifically, in the dye-sensitized solar cell of this embodiment, at least the first electrode base material is the above-described transparent conductive base material (hereinafter referred to as the third aspect), and at least the second. There are two possible modes: the mode in which the electrode base is the transparent conductive base (hereinafter referred to as the fourth mode). Hereinafter, each aspect will be described.

1. Dye-sensitized solar cell according to the third aspect The dye-sensitized solar cell according to the present aspect is characterized in that at least the first electrode base material is the transparent conductive base material.

The dye-sensitized solar cell of this embodiment will be described with reference to the drawings.
FIG. 5 is a schematic cross-sectional view showing an example of the dye-sensitized solar cell of this embodiment. As shown in FIG. 5, the dye-sensitized solar cell 100 of this embodiment is formed on a first electrode base 111 made of a transparent conductive base 2 and the first electrode base 111, and is a dye sensitizer. The oxide semiconductor electrode substrate 110 having the porous layer 112 containing the metal oxide semiconductor fine particles supported thereon, and the conductive substrate 1 having the first metal layer 1b and the second metal layer 1a as a second electrode layer. The counter electrode substrate made of the electrode base material 121 is disposed so that the porous layer 112 and the second metal layer 1a of the conductive base material 1 face each other, and the redox is provided between the oxide semiconductor electrode substrate 110 and the counter electrode substrate. An electrolyte layer 103 including a pair is formed. Moreover, the transparent conductive base material 2 is formed in a mesh shape on the transparent base material 2b, the transparent electrode layer 2a formed on the transparent base material 2b, and the transparent electrode layer 2a, and has a specific resistance of 6 × 10 ⁻⁶ Ω. A mesh-like metal layer 2c made of metal of m or less, and formed on the mesh-like metal layer 2c, made of any metal of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt, and having a thickness Has a second metal layer 2d having a thickness of 500 nm or less. In addition, about the electrically conductive base material 1, since it can be set as the thing demonstrated in FIG. 3, description here is abbreviate | omitted.
Moreover, as shown in FIG. 5, the edge part of the dye-sensitized solar cell 100 is normally sealed using the sealing agent 104 grade | etc.,.

According to this aspect, since the said 1st electrode base material has a transparent conductive base material as an electrode layer, the electric power generation efficiency of the dye-sensitized solar cell of this aspect can be made higher. The reason for this can be the same as the reason described in the section of the dye-sensitized solar cell of the first aspect, and thus the description thereof is omitted here.
Hereinafter, each member used for the dye-sensitized solar cell of this embodiment will be described.

(1) Oxide Semiconductor Electrode Substrate The oxide semiconductor electrode substrate used in this embodiment is a first electrode base material and a metal oxide formed on the first electrode base material and carrying a dye sensitizer. It has a porous layer containing semiconductor fine particles. Here, the porous layer can be the same as that described in the section “I. Dye-sensitized solar cell of the first embodiment”, and thus the description thereof is omitted here.

Moreover, the 1st electrode base material used for this aspect is a transparent conductive base material.
Such a transparent conductive base material can be the same as that described in the section “B. Transparent conductive base material for dye-sensitized solar cell”, and the description thereof is omitted here.

(2) Counter electrode substrate The counter electrode substrate used in this embodiment has at least a second electrode base material.

  In the dye-sensitized solar cell of this embodiment, since the first electrode substrate is a transparent substrate, the second electrode substrate is a transparent substrate and a non-transparent substrate. Both of these can be used. For example, in the case of a transparent substrate, the second electrode substrate can be the same as the second electrode substrate described in the section of the dye-sensitized solar cell of the first aspect. The description in is omitted.

  In the case of a substrate having no transparency, examples include a substrate having a metal layer having corrosion resistance against iodide ions. Among them, “A. Conductivity for dye-sensitized solar cell”. It is preferable to use the conductive substrate for a dye-sensitized solar cell described in “Substrate”. The conductive substrate for the dye-sensitized solar cell is low in cost, has high corrosion resistance against iodide ions, and can prevent a decrease in conversion efficiency of the dye-sensitized solar cell. It is.

  Further, when the second electrode substrate is the conductive substrate for dye-sensitized solar cell or the transparent conductive substrate, the second metal layer has the same effect as the catalyst layer. Therefore, the catalyst layer does not necessarily have to be formed, but may be formed in order to increase the power generation efficiency of the dye-sensitized solar cell. The catalyst layer can be the same as that described in the section “I. Dye-sensitized solar cell of the first embodiment”, and the description thereof is omitted here.

(3) Electrolyte layer The electrolyte layer used in this embodiment can be the same as that described in the section of “I. Dye-sensitized solar cell of the first embodiment”, so the description here is Omitted.

2. Dye-sensitized solar cell of the fourth aspect The dye-sensitized solar cell of the present aspect is characterized in that at least the second electrode substrate is a transparent conductive substrate.

The dye-sensitized solar cell of this embodiment will be described with reference to the drawings.
FIG. 6 is a schematic cross-sectional view showing an example of the dye-sensitized solar cell of this embodiment. As shown in FIG. 6, the dye-sensitized solar cell 100 of this embodiment is formed on a first electrode substrate 111 having the conductive substrate 1 as an electrode layer, and the first electrode substrate 111, and is dye-sensitized. An oxide semiconductor electrode substrate 110 having a porous layer 112 containing metal oxide semiconductor fine particles carrying an agent and a counter electrode substrate having a second electrode substrate 121 made of a transparent conductive substrate 2 are porous. The layer 112 and the transparent conductive substrate 2 are disposed so as to face each other, and an electrolyte layer 103 including a redox pair is formed between the oxide semiconductor electrode substrate 110 and the counter electrode substrate. Moreover, the transparent conductive base material 2 is formed in a mesh shape on the transparent base material 2b, the transparent electrode layer 2a formed on the transparent base material 2b, and the transparent electrode layer 2a, and has a specific resistance of 6 × 10 ⁻⁶ Ω. A mesh-like metal layer 2c made of metal of m or less, and formed on the mesh-like metal layer 2c, made of any metal of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt, and having a thickness Has a second metal layer 2d having a thickness of 500 nm or less. In addition, about the electrically conductive base material 1, since it can be set as the thing demonstrated in FIG. 3, description here is abbreviate | omitted.
Moreover, as shown in FIG. 6, the edge part of the dye-sensitized solar cell 100 is normally sealed using the sealing agent 104 grade | etc.,.
Hereinafter, each member used for the dye-sensitized solar cell of this embodiment will be described.

(1) Counter electrode substrate The counter electrode substrate used in this embodiment has at least a second electrode base material. Moreover, in this aspect, the said 2nd electrode base material is a transparent conductive base material.

  The transparent conductive substrate used in this embodiment can be the same as that described in the section “B. Transparent conductive substrate for dye-sensitized solar cell”, and the description here is omitted. To do.

  In this embodiment, since the second metal layer of the transparent conductive substrate exhibits the same effect as the catalyst layer, the catalyst layer is not necessarily formed, but the dye-sensitized type You may form in order to make the power generation efficiency of a solar cell higher.

(2) Oxide Semiconductor Electrode Substrate The oxide semiconductor electrode substrate used in this embodiment is a first electrode base material and a metal oxide formed on the first electrode base material and carrying a dye sensitizer. It has a porous layer containing semiconductor fine particles. Here, the porous layer can be the same as that described in the section “I. Dye-sensitized solar cell of the first embodiment”, and thus the description thereof is omitted here.

  In the dye-sensitized solar cell of this embodiment, since the second electrode substrate is a transparent substrate, the first electrode substrate is a transparent substrate and a non-transparent substrate. Both of these can be used. As the first electrode substrate, for example, in the case of a transparent substrate, the first electrode substrate can be the same as the first electrode substrate described in the section of the dye-sensitized solar cell of the second aspect. The description in is omitted.

  In the case of a substrate having no transparency, examples include a substrate having a metal layer having corrosion resistance against iodide ions. Among them, “A. Conductivity for dye-sensitized solar cell”. It is preferable to use the conductive substrate for a dye-sensitized solar cell described in “Substrate”. The conductive substrate for the dye-sensitized solar cell is low in cost, has high corrosion resistance against iodide ions, and can prevent a decrease in conversion efficiency of the dye-sensitized solar cell. It is.

(3) Electrolyte layer The electrolyte layer used in this embodiment can be the same as that described in the section of “I. Dye-sensitized solar cell of the first embodiment”, so the description here is Omitted.

3. Others As the dye-sensitized solar cell of the present invention, among the dye-sensitized solar cell of the third aspect described above and the dye-sensitized solar cell of the fourth aspect, the dye-sensitized solar cell of the third aspect More preferably, it is a battery. This is because the dye-sensitized solar cell of the third aspect is more excellent in power generation efficiency.

III. Others The method for producing the dye-sensitized solar cell of the present invention is not particularly limited as long as the dye-sensitized solar cell having the above-described configuration can be produced. For example, the above oxide semiconductor The electrode substrate and the counter electrode substrate are arranged so that the porous layer and the second electrode base material face each other and sealed with a sealant, and then the liquid or gel electrolyte is placed on the oxide semiconductor electrode substrate and the counter electrode substrate. The manufacturing method which manufactures a dye-sensitized solar cell by forming an electrolyte layer by inject | pouring between can be mentioned.
Further, for example, a solid electrolyte layer material is applied on the porous layer of the oxide semiconductor electrode substrate and dried to form a solid electrolyte layer, and then the oxide semiconductor electrode substrate and the counter electrode substrate are formed into the solid electrode. The manufacturing method which manufactures a dye-sensitized solar cell by making it contact and arrange | position so that an electrolyte layer and a 2nd electrode base material may oppose can be mentioned.

  In addition, all the manufacturing methods of the dye-sensitized solar cell mentioned above are examples, and it is possible to use the other general manufacturing method of a dye-sensitized solar cell in this invention.

D. Dye-sensitized solar cell module The dye-sensitized solar cell module of the present invention comprises a plurality of dye-sensitized solar cells described in the section “C. Dye-sensitized solar cell”. It is what.

  As the dye-sensitized solar cell module of the present invention, an embodiment using the above-mentioned “I. Dye-sensitized solar cell of the first embodiment” (hereinafter, the dye-sensitized solar cell module of the third embodiment and ) And an embodiment using “II. Dye-sensitized solar cell of the second embodiment” (hereinafter referred to as a dye-sensitized solar cell module of the fourth embodiment). Can be mentioned. In the following description, the dye-sensitized solar cell conductive substrate may be simply referred to as a conductive substrate, and the dye-sensitized solar cell transparent conductive substrate may be simply referred to as a transparent conductive substrate. is there.

A dye-sensitized solar cell module according to a third embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a schematic cross-sectional view showing an example of the dye-sensitized solar cell module according to the third embodiment of the present invention. The dye-sensitized solar cell module 200 of the present invention is formed on the first electrode substrate 111 having the conductive substrate 1 as an electrode layer, and the first electrode substrate 111, and the dye-sensitized agent is carried thereon. Formed on the oxide semiconductor electrode substrate 110 having the porous layer 112 containing metal oxide semiconductor fine particles, the second electrode substrate 121 having the transparent substrate 121b and the transparent electrode layer 121a, and the transparent electrode layer 121a The counter electrode substrate 120 having the catalyst layer 122 is disposed so that the porous layer 112 and the catalyst layer 122 face each other, and the electrolyte layer 103 includes a redox pair between the oxide semiconductor electrode substrate 110 and the counter electrode substrate 120. Is formed by connecting a plurality of dye-sensitized solar cells 100 in parallel. In addition, about the electrically conductive base material 1, since it can be set as the thing demonstrated in FIG. 3, description here is abbreviate | omitted.
In addition, as shown in FIG. 7, the end portion of the dye-sensitized solar cell module 200 is usually sealed with a sealant 104 or the like, and a partition wall 105 is provided between the dye-sensitized solar cells 100. It is formed. In addition, in FIG. 7, although it has shown about the case where the 1st electrode base material has the electroconductive base material 1 as an electrode layer and the 2nd electrode base material is a base material which has transparency, although not illustrated, The first electrode substrate may be a transparent substrate, and the second electrode substrate may be the conductive substrate 1. Although not shown, as the dye-sensitized solar cell module according to the third embodiment of the present invention, a plurality of dye-sensitized solar cells 100 may be connected in series.

Moreover, the dye-sensitized solar cell module of the 4th embodiment in this invention is demonstrated using figures. FIG. 8 is a schematic sectional view showing an example of the dye-sensitized solar cell module according to the fourth embodiment of the present invention. The dye-sensitized solar cell module 200 of the present invention includes a first electrode substrate 111 made of a transparent conductive substrate 2, and a metal formed on the first electrode substrate 111 and carrying a dye sensitizer. An oxide semiconductor electrode substrate 110 having a porous layer 112 containing oxide semiconductor fine particles, and a second electrode substrate 121 having a conductive substrate 1 having a first metal layer 1b and a second metal layer 1a as electrode layers. The counter electrode substrate is disposed so that the porous layer 112 and the second metal layer 1a of the conductive base material 1 are opposed to each other, and the electrolyte layer 103 includes a redox pair between the oxide semiconductor electrode substrate 110 and the counter electrode substrate. Is formed by connecting a plurality of dye-sensitized solar cells 100 formed in parallel. Note that the transparent conductive substrate 2 can be the same as that described with reference to FIG. In addition, the conductive base material 1 can be the same as that described in FIG.
In addition, as shown in FIG. 8, the end portion of the dye-sensitized solar cell module 300 is usually sealed with a sealant 104 or the like, and a partition wall 105 is formed between the dye-sensitized solar cells 100. Is.
8 shows the case where the first electrode base 111 is the transparent conductive base 2 and the second electrode base 121 is the conductive base 1, the dye-sensitized type of the present invention. Although not shown in the drawings, the solar cell module is not limited to the above embodiment, but at least one of the first electrode substrate and the second electrode substrate may be a transparent conductive substrate. Although not shown, the dye-sensitized solar cell module according to the fourth embodiment of the present invention may include a plurality of dye-sensitized solar cells connected in series.

  According to the present invention, even when the dye-sensitized solar cell of any of the above-described embodiments is used, the electrode base material is not easily affected by the corrosion of iodide ions in the electrolyte layer, and is deteriorated with time. Since there are few things, it can be set as a high quality dye-sensitized solar cell module. Moreover, since the said dye-sensitized solar cell is a thing with high electric power generation efficiency, it can be set as the module for high quality dye-sensitized solar cells.

  The dye-sensitized solar cell used in the present invention can be the same as that described in the section “C. Dye-sensitized solar cell”, and thus description thereof is omitted here.

  In the present invention, a mode in which a plurality of dye-sensitized solar cells are connected is particularly limited as long as a desired electromotive force can be obtained by the dye-sensitized solar cell module of the present invention. is not. Such an embodiment may be an embodiment in which individual dye-sensitized solar cells are connected in series, or may be connected in parallel.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the technical idea described in the claims of the present invention has substantially the same configuration and exhibits the same function and effect regardless of the case. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be described more specifically with reference to examples.

[Example 1]
A stainless steel substrate (SUS304, specific resistance 0.7 × 10 ⁻⁶ Ω · m) having a thickness of 50 μm is used as the first metal layer, and a Cr layer having a thickness of 15 nm is formed as the second metal layer on the stainless steel substrate. A conductive substrate for a dye-sensitized solar cell was obtained by vacuum deposition.

Polyvinylpyrrolidone (K-90 manufactured by Nippon Shokubai Co., Ltd.) was added to the ink in which TiO ₂ fine particles (P25 manufactured by Nippon Aerosil Co., Ltd.) were dispersed in ethanol, in a solid content ratio to obtain a coating solution for forming a porous layer. . Next, the conductive substrate for the dye-sensitized solar cell is prepared as the first electrode substrate, and the porous layer forming coating solution is applied on the Cr layer of the conductive substrate for the dye-sensitized solar cell. It apply | coated by the area of 10 mm x 10 mm using a doctor blade, Then, it dried at 120 degreeC and the layer for porous layer formation of thickness 7 micrometers was obtained. Next, a pressure of 0.1 t / cm was applied to the porous layer forming layer with a press. Next, the layer for forming a porous layer after pressing was fired at 500 ° C. for 30 minutes.

A dye sensitizer solution was prepared by dissolving an organic dye (D358 manufactured by Mitsubishi Paper Industries Co., Ltd.) in a mixed solvent of acetonitrile / t-butanol = 1/1 to a concentration of 3.0 × 10 ⁻⁴ mol / l. The porous layer forming layer was immersed in the dye sensitizer solution for 3 hours. After soaking, the dye sensitizer solution was pulled up from the dye sensitizer solution, and the dye sensitizer solution adhered to the porous layer forming layer was washed with acetonitrile and air-dried. Thereby, a porous layer was formed, and an oxide semiconductor electrode substrate was obtained.

0.043 g of potassium iodide was added to a solution prepared by dissolving 0.14 g of cationic hydroxy cellulose (Delcel Chemical Co., Ltd., Gelner QH200) in 2.72 g of ethanol, and dissolved by stirring. Next, 0.18 g of 1-ethyl-3-methylimidazolium tetracyanoborate (EMIm-B (CN) ₄ ), 0.5 g of 1-propyl-3-methylimidazolium iodide (PMIm-I) was added to the solution. , 0.025 g of I ₂ was added and dissolved by stirring. Thus, a coatable electrolyte solution was prepared.

  A PEN film is used as a conductive support (transparent substrate), and a second electrode substrate having an ITO layer formed on the PEN film as a transparent electrode layer is prepared. %) To form a catalyst layer to produce a counter electrode substrate.

  On the porous layer (10 mm × 10 mm) of the oxide semiconductor electrode substrate, the electrolyte solution was applied with a doctor blade and dried at 100 ° C. to form an electrolyte layer. The oxide semiconductor electrode substrate and the counter electrode substrate were bonded together and fixed with clips so that the electrolyte layer and the catalyst layer faced to obtain a dye-sensitized solar cell.

[Example 2]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the second metal layer was a Cr layer having a thickness of 50 nm.

[Example 3]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the second metal layer was a Ti layer having a thickness of 15 nm.

[Example 4]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the second metal layer was a Ti layer having a thickness of 50 nm.

[Example 5]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the second metal layer was a Ti layer having a thickness of 500 nm.

[Example 6]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the second metal layer was a Ti layer having a thickness of 250 nm.

[Comparative Example 1]
A dye-sensitized solar cell was obtained in the same manner as in Example 1 except that a 50 μm-thick stainless steel substrate (SUS304, specific resistance 0.7 × 10 ⁻⁶ Ω · m) was used as the first electrode substrate. Was made.

[Comparative Example 2]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that a 50 μm-thick Ti substrate (specific resistance 0.7 × 10 ⁻⁶ Ω · m) was used as the first electrode substrate. .

[Comparative Example 3]
A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the second metal layer was a Ti layer having a thickness of 1 μm.

[Evaluation]
About the dye-sensitized solar cell produced in Examples 1 to 6 and Comparative Examples 1 to 3, the battery performance was measured by the following method.
The dye-sensitized solar cell produced was evaluated by measuring the current-voltage characteristics by applying voltage with a source measure unit (Keutley 2400 type) using AM1.5 and artificial sunlight (incident light intensity of 100 mW / cm ² ) as a light source. Then, the conversion efficiency and the fill factor were obtained from the obtained current-voltage characteristics. In addition, it measured by making pseudo sunlight inject from the counter-electrode board | substrate side. Moreover, the area of the porous layer used for the measurement is 1 cm ² (10 mm × 10 mm).

  Further, regarding the corrosion resistance of the conductive substrate, the produced dye-sensitized solar cell was subjected to a temperature of 65 ° C. and a humidity of 85% R.D. H. After 120 hours of storage in an oven adjusted to, the dye-sensitized solar cell is disassembled, the porous layer is removed and the exposed surface of the conductive substrate is visually observed to evaluate the presence or absence of metal corrosion did. In Table 1, the case where there was no corrosion is indicated by ○, and the case where there was corrosion is indicated by ×.

  Moreover, after forming a 2nd metal layer, Table 1 shows the result of having observed the surface of the electrically conductive base material visually, and evaluating the presence or absence of the generation | occurrence | production of a crack. Those having cracks are indicated by ×, and those having no cracks are indicated by ◯. In addition, about the comparative examples 2-3, since the 2nd metal layer is not formed, the presence or absence of a crack is not evaluated.

From Table 1, a dye-sensitized type in which a second metal layer made of a metal such as Ti or Cr is formed on a first metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less to a thickness of 500 nm or less. By using a conductive base material for solar cells as an electrode base material, it is possible to prevent a decrease in the polar factor, and to make a dye-sensitized solar cell with high power generation efficiency, high corrosion resistance, and deterioration over time. It turns out that it was able to be made into a thing with few. In addition, about the dye-sensitized solar cell of the comparative example 3, the current-voltage characteristic was not able to be measured, and it was estimated that it was because the crack generate | occur | produced in the 2nd metal layer as the cause.

DESCRIPTION OF SYMBOLS 1 ... Conductive base material for dye-sensitized solar cells 1a, 2d ... 2nd metal layer 1b ... 1st metal layer 2 ... Transparent conductive base material for dye-sensitized solar cells 2a ... Transparent electrode layer 2b ... Transparent base material 2c ... Mesh-like metal layer 100 ... Dye-sensitized solar cell 103 ... Electrolyte layer 104 ... Sealing agent 105 ... Partition 110 ... Oxide semiconductor electrode substrate 111 ... First electrode substrate 112 ... Porous layer 120 ... Counter electrode substrate 121 ... Second electrode substrate 200 ... Dye-sensitized solar cell module

Claims (8)

A first metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less;
A second metal layer formed on the first metal layer, made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt, and having a thickness of 500 nm or less;
A conductive substrate for a dye-sensitized solar cell, comprising: A transparent substrate;
A transparent electrode layer formed on the transparent substrate;
Ti, Cr, Ni, formed on the transparent electrode layer in a mesh shape, formed on the mesh metal layer, and a mesh metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less. An auxiliary metal layer having a second metal layer made of any metal of Mo, Ta, W, Nb, and Pt and having a thickness of 500 nm or less;
A transparent conductive substrate for a dye-sensitized solar cell, comprising: An oxide semiconductor electrode having a first electrode base material having a function as an electrode, and a porous layer formed on the first electrode base material and containing metal oxide semiconductor fine particles carrying a dye sensitizer A substrate and a counter electrode substrate having at least a second electrode base material having a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxide semiconductor electrode substrate And a dye-sensitized solar cell in which an electrolyte layer including a redox pair is formed between the counter electrode substrate,
Either the first electrode base material or the second electrode base material is formed on the first metal layer made of a metal having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less and the first metal layer. A conductive substrate for a dye-sensitized solar cell, comprising a second metal layer made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt and having a thickness of 500 nm or less. A dye-sensitized solar cell having an electrode layer and the other being a transparent substrate.   The said 1st electrode base material has the said electroconductive base material for dye-sensitized solar cells as an electrode layer, and the said 2nd electrode base material is a base material which has transparency. 2. A dye-sensitized solar cell according to 1. An oxide semiconductor electrode having a first electrode base material having a function as an electrode, and a porous layer formed on the first electrode base material and containing metal oxide semiconductor fine particles carrying a dye sensitizer A substrate and a counter electrode substrate having at least a second electrode base material having a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxide semiconductor electrode substrate And a dye-sensitized solar cell in which an electrolyte layer including a redox pair is formed between the counter electrode substrate,
At least one of the first electrode substrate or the second electrode substrate is formed in a mesh shape on a transparent substrate, a transparent electrode layer formed on the transparent substrate, and the transparent electrode layer. A mesh-like metal layer made of a metal having a resistance of 6 × 10 ⁻⁶ Ω · m or less and any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt formed on the mesh-like metal layer A dye-sensitized solar cell, which is a transparent conductive substrate for a dye-sensitized solar cell, comprising a metal and an auxiliary metal layer having a second metal layer having a thickness of 500 nm or less.   The dye-sensitized solar cell according to claim 5, wherein the first electrode substrate is the transparent conductive substrate for the dye-sensitized solar cell. An oxide semiconductor electrode having a first electrode base material having a function as an electrode, and a porous layer formed on the first electrode base material and containing metal oxide semiconductor fine particles carrying a dye sensitizer A substrate and a counter electrode substrate having a second electrode base material having at least a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxide semiconductor electrode substrate and the oxide semiconductor electrode substrate An electrolyte layer including a redox pair is formed between the counter electrode substrates, and one of the first electrode base material and the second electrode base material has a specific resistance of 6 × 10 ⁻⁶ Ω · m or less. A first metal layer made of metal and formed on the first metal layer, made of any one of Ti, Cr, Ni, Mo, Ta, W, Nb, and Pt, and has a thickness of 500 nm or less. For dye-sensitized solar cell having second metal layer Electrodeposition having a substrate as an electrode layer, the other dye-sensitized solar cell module is dye-sensitized solar cell which is a base material, characterized by comprising a plurality connected with transparency. An oxide semiconductor electrode having a first electrode base material having a function as an electrode, and a porous layer formed on the first electrode base material and containing metal oxide semiconductor fine particles carrying a dye sensitizer A substrate and a counter electrode substrate having a second electrode base material having at least a function as an electrode are disposed so that the porous layer and the second electrode base material face each other, and the oxide semiconductor electrode substrate and the oxide semiconductor electrode substrate An electrolyte layer including a redox pair is formed between the counter electrode substrates, and at least one of the first electrode substrate or the second electrode substrate is formed on the transparent substrate and the transparent substrate. A transparent electrode layer, a mesh-like metal layer formed on the transparent electrode layer and having a specific resistance of 6 × 10 ⁻⁶ Ω · m or less, and a mesh-like metal layer formed on the mesh-like metal layer; , Cr, Ni, Mo, Ta, W, A dye-sensitized solar that is a transparent conductive base material for a dye-sensitized solar cell, and includes an auxiliary metal layer having a second metal layer that is made of any metal of Nb and Pt and has a thickness of 500 nm or less A dye-sensitized solar cell module comprising a plurality of batteries connected.

Images