JP5334380B2 - Dye-sensitized solar cell and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the photoelectric transfer efficiency of a dye sensitized solar battery. <P>SOLUTION: The dye sensitized solar battery includes a negative electrode 40 and a positive electrode 50 disposed opposite to the negative electrode 40. The negative electrode 40 and the positive electrode 50 are bonded with a sealing material 60. An electrolyte solution 65 is filled between the negative electrode 40 and the positive electrode 50 and sealed with the sealing material 60. The negative electrode 40 includes a glass substrate 41 whose surface is coated with a transparent conductive film 42. A porous titanium oxide film 43 is formed on the transparent conductive film 42. This surface adsorbs (carries) a sensitizing dye 44. The positive electrode 50 includes a transparent glass substrate 51 whose surface is coated with a transparent conductive film 52. A porous titanium oxide layer 53 is formed on the surface of the transparent conductive film 52. A thin catalyst electrode 54 to accelerate reaction of the electrolyte solution 65 is formed on the whole surface of the transparent conductive film 52 containing the porous titanium oxide layer 53. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a dye-sensitized solar cell that converts light energy into electric energy and a method for producing the same, and more particularly to a positive electrode structure of a dye-sensitized solar cell.

  It is said that the solar energy that falls on the entire earth is 100,000 times the power consumed by the whole world. In other words, we are already surrounded by enormous energy resources without special industrial activities. The solar cell is a device for converting this resource (sunlight) into electrical energy that is easy for human beings to use, and has a history of 50 years. By the way, 90% or more of solar cells currently produced are silicon (Si) solar cells, and Si solar cells are further classified into single crystal Si, polycrystal Si, and amorphous Si. These differ in conversion efficiency (conversion efficiency is the ratio of the amount of energy applied in the system to the amount of energy extracted outside the system), cost, and processing performance, and depends on the product, application, installation location, etc. Is selected. Here, among Si solar cells, single crystal Si solar cells have the highest conversion efficiency, and a product reaching 20% at a practical level is also manufactured. In special applications such as those for artificial satellites, compound semiconductors having ultra-high conversion efficiency and excellent radiation resistance deterioration characteristics may be used.

  By the way, renewable energy such as solar cells is said to be an ideal energy resource with almost no environmental load, but so far it has not been sufficiently spread. The reason is high power generation cost. Currently, the unit price of electricity in Japan is about 20 yen / kWh, but the installation cost of a solar power generation system that can almost cover the power consumption (3-5 kW) of ordinary households is 2 million yen to 4 million yen. If considered, a minimum of 20 years will be required before complete depreciation. Due to the length of this depreciation period and the high initial investment, the spread to general households has not progressed much. Under these circumstances, it is necessary to reduce the cost of power generation in order to further activate the market and realize an energy supply system (society) that harmonizes with nature. And this requires technical progress, and specifically, there are two approaches.

  The first is to achieve higher efficiency of the solar cell itself. If the power generation efficiency is doubled even at the same manufacturing cost, the product cost is equivalent to halving. The second is a method of reducing the product unit price itself by improving the material, the manufacturing method, or the structure itself. Currently, mainstream Si solar cells require high-purity Si material, high temperature / high vacuum in the manufacturing process, and production / processing of Si material on large area substrates However, the production cost cannot be reduced effectively with the enlargement of production facilities. For this reason, material costs are reduced by using materials other than Si-based materials, and furthermore, high temperature processes and vacuum processes are eliminated as much as possible to reduce energy consumption during the manufacturing process, resulting in greatly reduced total costs. Various types of solar cells have also been proposed.

  Typical examples are wet dye-sensitized (Gretzel cell) solar cells (dye-sensitized solar cells) and dry organic thin-film solar cells. The former dye-sensitized solar cell has a simple structure and can select abundant resources as a constituent material as described in, for example, the following patent documents. Furthermore, it is estimated that the power generation cost can be reduced to 1/5 or less as compared with the current mainstream Si-based solar cells because less energy is consumed in the manufacturing process and no large-scale equipment is required.

Japanese Patent Laid-Open No. 10-112337

FIG. 5 is a cross-sectional view showing a schematic configuration of a conventional general dye-sensitized solar cell described in Patent Document 1 and the like.

  This dye-sensitized solar cell includes iodine (I) between a negative electrode 10 that is a working electrode (also referred to as “anode electrode”) and a positive electrode 20 that is a counter electrode (also referred to as “cathode electrode”). The electrolyte solution 30 is filled.

  The negative electrode 10 has a glass substrate 11, and the surface thereof is covered with a transparent conductive film (for example, fluorine-doped tin oxide (FTO) or tin-doped indium oxide (ITO)) 12. On the transparent conductive film 12, a paste material containing fine particles of titanium dioxide (TiO 2, also referred to as “titania”) is applied, and this titania paste material is sintered by annealing to form a porous semiconductor electrode 13. Is formed. A sensitizing dye 14 made of a ruthenium (Ru) metal complex (for example, Ru dye N719) is supported (adsorbed) on the semiconductor electrode 13. The positive electrode 20 facing the negative electrode 10 has a glass substrate 21 on which a catalyst electrode (for example, a conductive film and thin platinum (Pt)) 22 is formed.

  In this type of dye-sensitized solar cell, when light is made incident from the negative electrode 10 side (however, in Patent Document 1, light is made incident from the positive electrode 20 side), the sensitization that is adsorbed to the porous semiconductor electrode 13. The dye 14 absorbs light and excites electrons e−. Since the conduction band of the semiconductor electrode 13 has a lower energy order of about 0.2 eV than the excitation order of the sensitizing dye 14, the excited electron e− flows toward the semiconductor electrode 13. Further, the electrons e− flow through the transparent conductive film 12 on the glass substrate 11 to operate the external load 35 and then reach the positive electrode 20 side. Thereafter, the electrons e− are delivered into the electrolyte solution 30 by a reduction reaction with iodine ions I−, and the iodine (I) undergoes an oxidation reaction in which the electrons e− are delivered to the sensitizing dye 14 which has been diffused and excited. . By repeating the above cycle, a photovoltaic force is generated due to steady light irradiation.

FIG 6 (A) ~ (E) are manufacturing process diagrams schematically illustrating a manufacturing method of the dye-sensitized solar cell of FIG.

First, in FIG. 6A, a glass substrate 11 whose surface is covered with a transparent conductive film 12 of FTO or ITO is prepared. The sheet resistance value of the transparent conductive film 12 is 10Ω / □ or less, and the thickness is about 0.5 μm.

In FIG. 6B , a paste material containing titania fine particles of about 10 to 30 nm is applied by a screen printing method or a coating method. The thickness of the titania paste material is about 50 μm. Next, the titania paste material is sintered by annealing at 500 ° C. for about 2 hours. As a result, the solvent of the paste scatters and the titania fine particles are necked to form the porous semiconductor electrode 13, thereby forming an electron e− diffusion path.

6C, the substrate on which the porous semiconductor electrode 13 is formed is immersed in an alcohol solution containing a sensitizing dye 14 made of a Ru metal complex for about half a day. The sensitizing dye 14 is adsorbed on the surface. Further, after washing with ethanol, it is dried in a dark place.

In FIG. 6D, a substrate obtained by sputtering a catalyst electrode (for example, a conductive film and thin Pt) 22 on a glass substrate 21 is prepared as the positive electrode 20. After forming a high-milan film (for example, Mitsui-DuPont Chemical: 1004) as the thermoplastic film adhesive 31 around the periphery of the catalyst electrode 22 on the positive electrode 20 side and the periphery of the semiconductor electrode 13 on the negative electrode 10 side, The negative electrode 10 and the positive electrode 20 are bonded at 130 ° C.

In FIG. 6E, an injection hole 32 is formed in the positive electrode 20. The electrolyte solution 30 containing iodine (I) is injected from the injection hole 32, the gap between the negative electrode 10 and the positive electrode 20 is filled with the electrolyte solution 30, and the injection hole 32 is closed. Thereafter, when the negative electrode wiring 33 is connected to the negative electrode 10 and the positive electrode wiring 34 is connected from the positive electrode 20 side, the manufacture of the flat dye-sensitized solar cell as shown in FIG. 5 is completed.

By the above manufacturing method and the power generation mechanism shown in FIG. 5 , an inexpensive and highly efficient dye-sensitized solar cell can be manufactured. This is because the mainstream Si solar cells currently require high-temperature and high-vacuum manufacturing methods and large-scale equipment, and high-purity Si is used as a raw material. Since it can be used, it is possible to manufacture a very inexpensive solar cell as compared with a Si solar cell. For this reason, it is attracting attention as a leading candidate for low-cost solar cells.

  However, the current conversion efficiency is about 11% even in the top data, and when the cell becomes a large-area cell at a practical level, the conversion efficiency rapidly decreases as the area increases. As described above, the dye-sensitized solar cell has a feature that is far superior to other solar cells in terms of cost reduction. However, in terms of efficiency, the top data is about 11%, and the single crystal Si solar cell. Less than half.

  Here, the parasitic resistance inside a cell is mentioned as a factor which inhibits the efficiency improvement of the dye-sensitized solar cell which can expect about 30% as theoretical efficiency. Further, this parasitic resistance is caused by each region (for example, the transparent conductive film 12 on the negative electrode 10 side, the semiconductor electrode 13, the catalyst electrode 22 on the positive electrode 20 side) or the interface (for example, between the negative electrode 10 and the electrolyte solution 30). At the interface, the interface between the positive electrode 20 and the electrolyte solution 30).

Conventionally, in order to solve such a problem, for example, in the technique of Patent Document 1, as a semiconductor electrode 13 carrying a sensitizing dye 14, a metal constituting a conductive substrate (on the transparent conductive film 12 in FIG. 5 ) . The electrical resistance at the interface is reduced by using an oxide film formed by anodizing the equivalent) and forming an integrated structure in which the conductive substrate and the oxide film are firmly coupled. In addition, the electrical resistance between the fine particles constituting the anodic oxide film ( corresponding to the porous semiconductor electrode 13 in FIG. 5 ) is reduced by the heating effect by anodic oxidation and hydrothermal treatment. Thereby, the photoelectric conversion efficiency is improved.

  However, even with the technique described in Patent Document 1, the parasitic resistance inside the battery is still large, and there is a limit in improving the photoelectric conversion efficiency, and it is difficult to obtain a desired photoelectric conversion efficiency.

  Therefore, an object of the present invention is to further improve the efficiency of the dye-sensitized solar cell by reducing the resistance component existing at the interface between the positive electrode and the electrolyte solution.

The dye-sensitized solar cell of the present invention is a transparent conductive first substrate, a semiconductor electrode formed on the first substrate and having a sensitizing dye, and facing the first substrate. A conductive second substrate disposed on the electrolyte side, and an electrolyte sealed between the semiconductor electrode and the second substrate, and the second substrate on the electrolyte side The dye-sensitized solar cell has a porous oxide semiconductor layer formed thereon, and a catalyst electrode that promotes the reaction of the electrolyte is formed on the surface of the porous oxide semiconductor layer. Then, the porous oxide semiconductor layer is a porous titanium oxide layer, characterized in that the small particles are mixed resistance value than acid titanium have a electrolyte-electrolyte and conductivity.

The manufacturing method of the dye-sensitized solar cell of the present invention is the manufacturing method of the dye-sensitized solar cell of the present invention, wherein the semiconductor electrode having the sensitizing dye is formed on the first substrate by firing. Forming the porous titanium oxide layer on the second base material, and further forming the catalyst electrode on the surface of the porous titanium oxide layer; and And a step of sealing the electrolyte interposed between the semiconductor electrode and the catalyst electrode with a sealing material. The porous titanium oxide layer is a porous titanium nitride layer partially coated with titanium nitride paste after applying the titanium oxide paste mixed with the fine particles onto the second substrate. A film is formed and formed.

According to the dye-sensitized solar cell and the manufacturing method thereof of the present invention, a porous oxide semiconductor comprising a porous titanium oxide layer in which fine particles having electrolyte resistance and conductivity and having a smaller resistance value than titanium oxide are mixed. Since the layer is provided on the positive electrode side and the catalyst electrode is formed on the surface of the porous oxide semiconductor layer , the interface resistance between the positive electrode and the electrolyte can be greatly improved. Therefore, the photoelectric conversion efficiency of the dye-sensitized solar cell can be improved with a relatively simple configuration and manufacturing method.

  The best mode for carrying out the invention will become apparent from the following description of the preferred embodiments when read in conjunction with the accompanying drawings.

(Configuration / Operation of Embodiment 1)
FIG. 1 is a schematic cross-sectional view of a dye-sensitized solar cell showing Example 1 of the present invention.
The dye-sensitized solar cell includes a negative electrode 40 and a positive electrode 50 disposed to face the negative electrode 40, and the negative electrode 40 and the positive electrode 50 are bonded to each other with a sealing material 60. An electrolyte (for example, an electrolyte solution in which iodine (I), lithium iodide, acetonitrile, TBP (4-tert-butylpyridine) or the like is mixed) 65 is filled between the negative electrode 40 and the positive electrode 50, and the electrolyte solution 65 Is sealed with a sealing material 60.

  The negative electrode 40 has a transparent conductive first base material (for example, a substrate in which the surface of the glass substrate 41 is covered with a transparent conductive film 42 such as FTO or ITO). A porous semiconductor electrode (for example, a porous titanium oxide film which is a porous oxide semiconductor film) 43 is formed on the transparent conductive film 42, and a Ru metal complex (for example, Ru dye N719) is formed on the surface. A sensitizing dye 44 such as is adsorbed (supported).

The positive electrode 50 has a second base material (for example, a substrate in which the surface of a transparent glass substrate 51 is covered with a transparent conductive film 52 such as FTO or ITO). A porous oxide semiconductor layer (for example, a porous titanium oxide layer having a thickness of about 1 μm or less) 53 is formed on the surface of the transparent conductive film 52 so as to face the porous titanium oxide film 43 on the negative electrode 40 side. ing. On the entire surface of the transparent conductive film 52 including the porous titanium oxide layer 53, a catalyst electrode 54 such as a thin Pt film that promotes the reaction of the electrolyte solution 65 is formed.

  The negative electrode 40 and the positive electrode 50 are bonded by a sealing material 60 at a predetermined interval. The sealing material 60 is, for example, an ultraviolet (UV) curable or thermosetting resin body, and the electrolyte solution 65 is sealed by the sealing material 60. As the sealing material 60, for example, when a high-milan film made of Mitsubishi DuPont is used as a thermoplastic film adhesive, the negative electrode 40 and the positive electrode 50 are thermocompression bonded to seal the inside. The sealing material 60, the negative electrode 40, or the positive electrode 50 has an injection hole (not shown), and an electrolyte solution 65 injected from the injection hole is filled between the negative electrode 40 and the positive electrode 50. An injection hole (not shown) is sealed with an epoxy resin material or the like after injecting the electrolyte solution 65.

  In the dye-sensitized solar cell having such a configuration, when light is incident from the negative electrode 40 side (or the positive electrode 50 side), the sensitizing dye 44 adsorbed on the porous titanium oxide film 43 absorbs light, and electrons e- is excited. The excited electrons e− flow toward the porous titanium oxide film 43 side. Further, the electrons e− flow to an electrode (not shown) through the transparent conductive film 42 on the glass substrate 41 and reach the positive electrode 50 side after operating an external load. Thereafter, the electron e− is transferred into the electrolyte solution 65 by a reduction reaction with iodine ions I−, and the iodine (I) undergoes an oxidation reaction in which the electron e− is transferred to the sensitizing dye 44 which is diffused and excited. . By repeating the above cycle, a photovoltaic force is generated due to steady light irradiation.

(Manufacturing method of Example 1)
2 (A) to 2 (D) are schematic cross-sectional views of manufacturing steps showing the method for manufacturing the dye-sensitized solar cell of FIG.

  In the dye-sensitized solar cell of Example 1, for example, it is manufactured by the following steps (1) to (3).

(1) The manufacturing process of the negative electrode 40 shown to FIG. 2 (A) The manufacturing method of the negative electrode 40 is the same as the conventional manufacturing method, for example. That is, about 50 μm of titanium oxide paste 43a is applied to the glass substrate 41 on which the tin oxide-based transparent electrode film 42 is formed by a screen printing method or the like. After the application, annealing is performed for 90 minutes in an air atmosphere at a temperature of 500 ° C. to form a porous titanium oxide film 43 as shown in FIG. The film thickness of the porous titanium oxide at this time is about 10 μm.

  Next, the porous titanium oxide film 43 is dipped (immersed) for 20 hours in a solution obtained by dissolving a metal complex (for example, Ru dye 719) at 4 mM in a mixed solvent of acetonitrile and t-butyl alcohol. Thereby, the sensitizing dye 44 is adsorbed on the surface of the porous (porous) titanium oxide film 43, and the negative electrode 40 is formed.

(2) Manufacturing Process of Positive Electrode 50 Shown in FIGS. 2B to 2D The positive electrode 50 is manufactured together with the negative electrode 40 as follows, for example.
A titanium oxide paste 53a of about 1 μm or less is applied to a glass substrate 51 on which a transparent conductive film 52 such as FIO or ITO is formed by a screen printing method or a spray method. For example, various titanium oxide pastes manufactured by Solaronix may be formed as a single layer or stacked layers. After the application of the titanium oxide paste 53a and the like, an annealing process is performed for 90 minutes in an air atmosphere at a temperature of 500 ° C. to form a porous titanium oxide layer 53 as shown in FIG. At this time, the film thickness of the porous titanium oxide is about 0.5 μm or less. Thereby, the porous titanium oxide layer 53 having a surface roughness (roughness) of several hundreds or more is formed.

  Next, Pt serving as the catalyst electrode 54 is formed on the entire surface of the transparent conductive film 52 including the porous titanium oxide layer 53 by a sputtering method to a thickness of about 150 mm. At this time, Pt enters into the porous titanium oxide layer 53. As another method for forming the catalyst electrode 54, an ultrathin Pt layer may be formed on the surface of the porous titanium oxide layer 53 by plating instead of sputtering. Alternatively, hexachloroplatinic acid may be melted in isopropyl alcohol (IPA) and dipped, followed by baking at a temperature of about 400 ° C. to deposit Pt fine particles on the surface of the porous titanium oxide layer 53. . In any method, the point is to form Pt on the surface of the porous titanium oxide layer 53. Thereby, the positive electrode 50 is formed.

(3) Sealing step shown in FIG. 1 The negative electrode 40 of FIG. 2 (A) is turned upside down, and this and the positive electrode 50 are aligned, and a high-milan film (for example, a thickness made by Mitsubishi DuPont) is a thermoplastic film adhesive Sealing is performed by thermocompression bonding with a sealing material 60 made of a 60 μm high Milan film. Next, an electrolytic solution 65 in which iodine, lithium iodide, acetonitrile, TBP or the like is mixed from an injection hole (not shown) formed in a part of the sealing material 60, the negative electrode 40, or the positive electrode 50 is mixed between the negative electrode 50 and the positive electrode 60. Inject into the interstices of the complex. Then, if the said injection hole is sealed with an epoxy resin material etc., manufacture of the dye-sensitized solar cell of FIG. 1 will be complete | finished.

(Effect of Example 1)
According to the first embodiment, since the porous titanium oxide layer 53 is provided on the positive electrode 50 side and the Pt catalyst electrode 54 is formed on the surface, the interface resistance between the positive electrode 50 and the electrolytic solution 65 is greatly improved. Can do.

In the conventional dye-sensitized solar cell of FIG. 5 , when the porous semiconductor electrode 13 is formed on the negative electrode 10 side and the sensitizing dye 14 is adsorbed on the surface thereof, the effective area is flat. In comparison, it was about 1000 times wider. As a result, the light can be used effectively and the conversion efficiency has been dramatically improved. However, for the positive electrode 20, a slight improvement in roughness has been attempted, but not as much as the negative electrode.

  In the first embodiment, the roughness factor is improved by making the positive electrode 50 as porous as the negative electrode 40, and the interface resistance component can be greatly reduced. Thereby, the photoelectric conversion efficiency of a dye-sensitized solar cell can be improved.

(Configuration / Manufacturing Method of Example 2)
3 (A) and 3 (B) are cross-sectional views of a schematic manufacturing process showing the method for manufacturing the dye-sensitized solar cell of FIG. 1 in Example 2 of the present invention, and FIG. ) And (D) elements common to the elements in FIG.

  The basic configuration and manufacturing method of the dye-sensitized solar cell of Example 2 are almost the same as those of Example 1. The difference from Example 1 is that a titanium oxide paste 53a screen-printed on the positive electrode 50 side is annealed in a pure nitrogen (N2) atmosphere. All other manufacturing steps are the same as those in the first embodiment.

(Effect of Example 2)
According to the second embodiment, as compared with the baking treatment in the atmosphere or oxygen (O2) atmosphere as in the first embodiment, the oxidation in which titanium nitride (TiN) is partially formed when baking is performed in N2. A titanium layer is formed. This has a smaller resistance value than a pure titanium oxide layer. As a result, the interfacial resistance between the positive electrode 50 and the electrolytic solution 65 is about the same (level) as in Example 1, and the internal resistance value R1 can be made smaller than that in Example 1, and the dye-sensitized solar cell. The photoelectric conversion efficiency can be further improved.

(Configuration / Manufacturing Method of Example 3)
4 (A) and 4 (B) are cross-sectional views of a schematic manufacturing process showing the method for manufacturing the dye-sensitized solar cell of FIG. 1 in Example 3 of the present invention, and FIG. ), (D) and elements common to those in FIGS. 3A and 3B showing the second embodiment are denoted by common reference numerals.

  The basic configuration and manufacturing method of the dye-sensitized solar cell of Example 3 are almost the same as those of Examples 1 and 2. The difference from the first and second embodiments is that the positive electrode 50 side has an electrolyte resistance and conductivity, and has a resistance 55 smaller than that of titanium oxide (for example, a metal such as a tungsten fine particle of about 3.6 μm or a carbon fine particle). And the like, and the fine titanium particles 53 are mixed and dispersed in the titanium oxide paste 53a and fired to form the porous titanium oxide layer 53 containing the fine particles. Other configurations and manufacturing methods are the same as those in the first and second embodiments.

(Effect of Example 3)
According to the third embodiment, since the porous titanium oxide layer 53 is mixed with fine particles 55 made of metal having a resistance value smaller than that of titanium oxide, the internal resistance value R1 on the positive electrode 50 side can be further reduced. It is. That is, since metallic fine particles 55 and the like are mixed, the internal resistance value R1 can be greatly reduced, and the photoelectric conversion efficiency of the dye-sensitized solar cell can be further improved. In particular, the tungsten fine particles can be used as a part of the positive electrode 50 because the resistance to the iodine-based electrolytic solution 65 is high in the previous reports.

(Modification)
The present invention is not limited to Examples 1 to 3 described above, and the shape, structure, constituent material, manufacturing method, and the like of the dye-sensitized solar cell can be variously used and modified other than illustrated.

It is typical sectional drawing of the dye-sensitized solar cell which shows Example 1 of this invention. FIG. 2 is a schematic cross-sectional view of a manufacturing process showing a method for manufacturing the dye-sensitized solar cell of FIG. 1. It is sectional drawing of the outline manufacturing process which shows the manufacturing method of the dye-sensitized solar cell of FIG. 1 in Example 2 of this invention. It is sectional drawing of the outline manufacturing process which shows the manufacturing method of the dye-sensitized solar cell of FIG. 1 in Example 3 of this invention. It is sectional drawing which shows the typical structure of the conventional common dye-sensitized solar cell. FIG. 6 is a schematic manufacturing process diagram showing a manufacturing method in the dye-sensitized solar cell of FIG. 5.

Explanation of symbols

40 Negative electrode 41, 51 Glass substrate 42, 52 Transparent conductive film 43 Porous titanium oxide film 43a, 53a Titanium oxide paste 50 Positive electrode 53 Porous titanium oxide layer 54 Catalyst electrode 55 Fine particles 60 Sealing material 65 Electrolyte solution

Claims (5)

A transparent conductive first substrate;
A semiconductor electrode formed on the first substrate and having a sensitizing dye;
A conductive second substrate disposed opposite the first substrate;
An electrolyte sealed between the semiconductor electrode and the second substrate;
A porous oxide semiconductor layer is formed on the second substrate on the electrolyte side, and a catalyst electrode that promotes the reaction of the electrolyte is formed on the surface of the porous oxide semiconductor layer A dye-sensitized solar cell,
The porous oxide semiconductor layer is a porous titanium oxide layer, a dye-sensitized solar cell, wherein the small particles are mixed resistance value than acid titanium have a electrolyte-electrolyte and conductive . The electrolyte is an iodine-based electrolyte solution,
2. The dye-sensitized solar cell according to claim 1, wherein the catalyst electrode that promotes the reduction reaction of the iodine-based electrolyte solution is formed on the surface of the porous titanium oxide layer. The dye-sensitized solar cell according to claim 1 or 2, wherein the porous oxide semiconductor layer has a thickness of 0.5 µm to 1 µm. The dye-sensitized solar cell according to any one of claims 1 to 3, wherein the catalyst electrode is platinum. It is a manufacturing method of the dye-sensitized solar cell of any one of Claims 1-4,
Forming the semiconductor electrode having the sensitizing dye on the first substrate by baking;
Forming the porous titanium oxide layer on the second base material, and further forming the catalyst electrode on the surface of the porous titanium oxide layer;
The catalyst electrode is disposed opposite to the first substrate, and the electrolyte interposed between the semiconductor electrode and the catalyst electrode is sealed with a sealing material,
The porous titanium oxide layer is formed by applying a titanium oxide paste mixed with the fine particles onto the second base material and then baking it in a nitrogen atmosphere to partially form a titanium nitride porous film. A method for producing a dye-sensitized solar cell, which is formed and produced.

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