KR101042949B1 - Dye coating method of a metal oxide layer, dye-sensitized sollar cell and its fabrication method using the same - Google Patents

Abstract

PURPOSE: A method for coating the dye of a metal oxide layer, a dye-sensitized solar cell using the same, and a method for manufacturing the solar cell are provided to reduce time required for manufacturing processes using a saturated dye solution. CONSTITUTION: A transparent conductive substrate(202) is prepared. A dye-absorbent metal oxide layer(204b) is formed on the transparent conductive substrate. Dye is coated on the dye-absorbent metal oxide layer using a saturated dye solution. An oxide semiconductor electrode includes the dye-absorbent metal oxide layer. A counter electrode corresponds to the oxide semiconductor electrode and includes a transparent conductive film and a platinum layer. Oxidation-reduction electrolyte is filled in a space between the oxide semiconductor electrode and the counter electrode.

Description

Dye coating method of metal oxide layer, dye-sensitized solar cell using same and manufacturing method therefor {DYE COATING METHOD OF A METAL OXIDE LAYER, DYE-SENSITIZED SOLLAR CELL AND ITS FABRICATION METHOD USING THE SAME}

The present invention relates to a dye-sensitized solar cell, and more particularly, to a dye coating method of a metal oxide layer suitable for coating a dye on a metal oxide layer constituting the dye-sensitized solar cell, a dye-sensitized solar cell using the same, and a method of manufacturing the same.

The present invention is derived from research conducted as part of the original technology development project / future-based technology development project of the Ministry of Education, Science and Technology [Task control number: 2009-0093709, Task name: Development of high temperature stable electrolyte for dye-sensitized solar cell].

As is well known, solar cells, which are photoelectric conversion elements that convert sunlight into electrical energy, are infinite and environmentally friendly, unlike other energy sources, and therefore, their importance is increasing over time.

Initially, many monocrystalline or polycrystalline silicon solar cells were used. However, because silicon solar cells use large expensive equipment at the time of manufacture and raw material prices are high, the manufacturing cost is high and there is a limit in improving the conversion efficiency of converting solar energy into electrical energy.

As an alternative to such silicon solar cells, attention has been focused on solar cells using organic materials that can be manufactured at low cost. In particular, dye-sensitized solar cells, which are inexpensive to manufacture, have attracted much attention. .

In addition, the dye-sensitized solar cell is a solar cell published by Gratzel et al., Switzerland. The semiconductor electrode (cathode) and the counter electrode (for example, platinum) made of metal oxide nanoparticles on which dye particles are adsorbed are represented. Anode), dye coated on the cathode, and a photoelectrochemical solar cell including an electrolyte for redox using an organic solvent filled in the space between two electrodes.

In general, dye-sensitized solar cells use nanocrystalline materials that have many anchoring sites where dye particles can be adsorbed. In such dye-sensitized solar cells, dyes adsorbed to nanoparticle oxide semiconductor electrodes are visible and ultraviolet rays of sunlight. Electrons are generated by absorbing light of a region (for example, 400-900 nm) wavelength. Fluorine-doped SnO ₂ coated glass is currently used as a conductive substrate to maintain conductivity in dye-sensitized solar cells where heat treatment at high temperatures is essential.

On the other hand, when the dye is coated on the metal oxide layer used as a semiconductor electrode in the dye-sensitized solar cell conventionally by dissolving the solid dye in a solvent, such as ethanol, acetonitrile, soaking the metal oxide for about 6 hours or more The dye is coated on the metal oxide layer made of nanoparticles.

As described above, in order to coat a dye on a metal oxide layer used as a semiconductor electrode of a dye-sensitized solar cell, a manufacturing time of about 6 hours or more is required, and thus a technology development for reducing such manufacturing time is required.

Accordingly, the present invention is to provide a dye coating method of a metal oxide layer, a dye-sensitized solar cell using the same, and a method of manufacturing the same, in which a dye dissolved in a saturated solution can be coated onto a metal oxide layer.

The dye may be coated on the metal oxide layer by dissolving the dye by using any one of an alcohol group solution, a liquid ionic salt and a viscous polymer, or a saturated solution using a mixture containing at least two of them. The present invention provides a dye coating method of a metal oxide layer, a dye-sensitized solar cell using the same, and a method of manufacturing the same.

The object of the present invention is not limited to the above-mentioned object, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, an oxide semiconductor electrode including a transparent conductive substrate, a dye adsorption metal oxide layer coated with a dye using a saturated dye solution having a saturation concentration on the transparent conductive substrate, and the oxide semiconductor A dye-sensitized solar cell is provided that corresponds to an electrode and includes a counter electrode including a transparent conductive film and a platinum layer, and a redox electrolyte filled in a space between the oxide semiconductor electrode and the counter electrode attached through a partition wall.

According to another embodiment of the present invention, manufacturing an oxide semiconductor electrode by coating a dye using a saturated dye solution having a saturation concentration on the metal oxide layer formed on the transparent conductive substrate to form a dye adsorption metal oxide layer And manufacturing a counter electrode corresponding to the manufactured oxide semiconductor electrode, aligning the oxide semiconductor electrode and the counter electrode, and attaching the counter electrode through a partition wall, and oxidizing the space between the oxide semiconductor electrode and the counter electrode. Provided is a method of manufacturing a dye-sensitized solar cell comprising the step of filling a reducing electrolyte.

According to another embodiment of the present invention, the alcohol group solution, liquid ionic salt, boiling point of 60 ℃ to 150 ℃ any one of the polymer having a viscosity or a mixture containing at least two of them to have a saturation concentration Dissolving a dye and coating the dye by flowing a saturated dye solution in which the dye is dissolved into a metal oxide layer to form a dye adsorption metal oxide layer constituting a dye-sensitized solar cell. Dye coating methods are provided.

The present invention, in the case of the dye adsorption metal oxide layer constituting the semiconductor electrode of the dye-sensitized solar cell using a saturated dye solution in which the dye is dissolved in any one or a mixture of alcohol group solution, liquid ion salt, viscous polymer By coating the dye on the metal oxide layer, the manufacturing time of the dye-sensitized solar cell can be reduced.

1 illustrates a dye-sensitized solar cell including a dye-adsorbed metal oxide layer coated with a dye using a saturated dye solution according to an embodiment of the present invention.
2A to 2C are process flowcharts illustrating a process of forming a dye-adsorbed metal oxide layer coated with a dye on a transparent conductive substrate according to another embodiment of the present invention;
3 is a flowchart illustrating a process of manufacturing a dye-sensitized solar cell including a dye-adsorbed metal oxide layer coated with a dye using a saturated dye solution according to another embodiment of the present invention.

SUMMARY OF THE INVENTION The technical idea of the present invention is to apply a paste to a conductive substrate, and to bake the paste-coated conductive substrate at a high temperature to form a metal oxide layer, and any one or a mixture of an alcohol group solution, a liquid ion salt, and a viscous polymer. After the dye is coated on the metal oxide layer by using a saturated dye solution in which the dye is dissolved in, a counter electrode and a partition wall are formed, and an electrolyte is added to prepare a dye-sensitized solar cell. The problem can be solved.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments of the present invention make the disclosure of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a diagram illustrating a dye-sensitized solar cell including a dye adsorption metal oxide layer coated with a dye using a saturated dye solution according to an embodiment of the present invention.

Referring to FIG. 1, a dye-sensitized solar cell has a structure including a transparent conductive substrate 102, a dye adsorption metal oxide layer 104, an opposite electrode 106, a partition 108, a redox electrolyte 110, and the like. The transparent conductive substrate 102 may include, for example, indium-tin oxide (ITO), fluorine-tin oxide (FTO), ZnO, undoped SnO2, Al or the like may be formed using doped ZnO or the like, and the transparent conductive substrate 102 may be formed by, for example, sputtering, electroless deposition, vacuum deposition, chemical vapor deposition (CVD), or the like. It may be formed by a method such as 'CVD'), a nano powder using a sol-gel method, and heat treatment after a paste.

In addition, the transparent conductive substrate 102 and the dye adsorption metal oxide layer 104 formed thereon are formed of an oxide semiconductor electrode (cathode), and the opposite surface is coated with platinum (Pt) corresponding to the oxide semiconductor electrode (cathode). An electrode 106 (platinum anode) is formed.

The dye adsorption metal oxide layer 104 of the dye-sensitized solar cell having such a configuration is formed by adsorbing a dye to the metal oxide layer. Here, the metal oxide layer may be formed of, for example, TiO2 by applying a paste such as terpineol to the transparent conductive substrate 102 and then baking at high temperature, in particular, TiO2 nanoparticles. It is preferable to form at 10-30 nm.

The metal oxide layer may have a multi-layered structure, for example, by applying a layer containing 20 nm or more of TiO 2, and then applying a particle paste of about 300 nm on top thereof, and then separately baking the same at a high temperature or simultaneously. The metal oxide layer of a multilayer structure can be formed.

Here, the process of coating the dye on the metal oxide layer in detail, the solvent having an alcohol group having a boiling point of at least 90 kPa (for example, ethylene glycol, glycerol, etc.), liquid Ionic salts (e.g., imidazolium iodide, etc.), boiling points, for example, having a temperature range of 60 ° C-150 ° C, and viscous polymers (e.g., polyethylene glycol glycol) and so on, or a mixture containing at least two of them to dissolve the dye so as to saturate the resulting saturated dye solution to the metal oxide layer, for example, a temperature range of 80 ℃ to 250 ℃ The dye adsorption metal oxide layer 104 can be manufactured by cleaning the metal oxide layer with, for example, ethanol or the like after pouring and pouring it in a time range of, for example, 30 seconds to 10 minutes while maintaining it. The. Here, the metal oxide layer may be placed on a hot plate, for example, maintained in a temperature range of 50 ° C. to 150 ° C., in order to effectively perform the dye coating during the dye coating. Silver may, for example, have a concentration range of 10 mM-1 M.

Next, the counter electrode 106 facing the oxide semiconductor electrode (cathode) may include, for example, a transparent conductive film, a platinum layer, or the like, for example, a conductive plastic substrate, a metal substrate, or the like. It can be prepared using.

The oxide semiconductor electrode (cathode) and the counter electrode 106 (platinum anode) are attached through the partition wall 108, and the redox electrolyte 110 is filled in the space therebetween, whereby a dye-sensitized solar cell is manufactured. Here, the partition wall 108 is manufactured using, for example, surlyn, the polymer itself, and the like, after arranging the oxide semiconductor electrode and the counter electrode 106 at a predetermined distance from each other, and then heating the sulfene, the polymer itself, or the like. Can be attached by adding

Therefore, in the case of the dye adsorption metal oxide layer constituting the semiconductor electrode of the dye-sensitized solar cell, the metal oxide is prepared using a saturated dye solution in which a dye is dissolved in any one or a mixture of an alcohol group solution, a liquid ion salt, and a viscous polymer. By coating the dye on the layer, the manufacturing time of the dye-sensitized solar cell can be reduced.

Next, a metal oxide layer using a saturated dye solution in which a dye is dissolved in any one or a mixture of an alcohol group solution, a liquid ion salt, and a viscous polymer in the manufacturing process of the dye-sensitized solar cell having the above-described configuration. A process of forming a dye adsorption metal oxide layer by coating a dye on the substrate will be described.

2A to 2C are flowcharts illustrating a process of forming a dye-adsorbed metal oxide layer coated with a dye on a transparent conductive substrate according to another embodiment of the present invention.

Referring to FIG. 2A, a paste 204 such as, for example, terpineol is applied onto the transparent conductive substrate 202. Here, the transparent conductive substrate 202 may be formed using, for example, ZnO doped with ITO, FTO, ZnO, undoped SnO 2, Al, or the like, and the transparent conductive substrate 202 may be formed by, for example. For example, it can be formed through a method such as sputtering, electroless deposition, vacuum deposition, CVD, the use of nano-powder according to the sol-gel method, post-paste heat treatment.

Then, the transparent conductive substrate 202 to which the paste 204 is applied is calcined at high temperature to burn all the organic substances contained in the paste 204 to form the metal oxide layer 204a as shown in FIG. 2B. Here, the metal oxide layer 204a may be formed of, for example, TiO 2, and particularly preferably 10-30 nm of TiO 2 nanoparticles.

On the other hand, the metal oxide layer 204a may have a multi-layered structure, for example, by applying a layer containing 20 nm or more of TiO 2, and then applying a nanoparticle paste of about 300 nm on top thereof, each of which is separately heated at high temperature. Alternatively, at the same time, the metal oxide layer 204a of the multilayer structure may be formed by high temperature firing.

Next, the dye is coated on the metal oxide layer 204a formed on the transparent conductive substrate 202 by using a saturated dye solution in which a dye is dissolved in one or a mixture of an alcohol group solution, a liquid ion salt, and a viscous polymer. Thus, the dye adsorption metal oxide layer 204b is formed.

Here, the dye adsorption metal oxide layer includes a solvent having an alcohol group having a boiling point of at least 100 kPa (eg, ethylene glycol, glycerin, etc.), a liquid ionic salt (eg, imidazolium iodide, etc.), a boiling point. The dye is dissolved in any one of the polymers having a viscosity of at least 100 Pa (for example, polyethylene glycol, etc.), or a mixture containing at least two of them so as to saturate the resulting saturated dye solution. For example, after pouring down the oxide layer in a time range of, for example, 30 seconds to 10 minutes while maintaining a temperature range of 80 ° C to 250 ° C, for example, cleaning with ethanol or the like. It can be produced in a manner. Here, the metal oxide layer may be placed on a hot plate, for example, maintained in a temperature range of 50 ° C. to 150 ° C. to effectively perform the dye coating during the dye coating.

As an example, a metal oxide nano electrode to be dissolved by saturation of a dye in ethylene glycol having a boiling point of 196 kPa or more and coated with the dye is approximately, for example, a hot plate having a temperature range of 50 ° C. to 150 ° C. After a few minutes, a saturated dye solution having a concentration range of, for example, 10 mM-1 M can be poured down to the metal oxide nanoelectrode, and then the remaining solution can be cleaned with ethanol or the like. Here, it can be seen that the concentration of the saturated saturated dye solution maintains a relatively very high concentration as compared with the conventional dye concentration of about 5 mmol / L or less.

Therefore, by coating the dye on the metal oxide layer using a saturated dye solution in which the dye is dissolved in any one or a mixture of alcohol group solution, liquid ionic salt, and viscous polymer, it is used in dye-sensitized solar cells in a short time. Dye adsorption metal oxide layers can be prepared.

Next, the paste is applied to the conductive substrate using the dye coating process of the dye adsorption metal oxide layer as described above, and the paste coated conductive substrate is calcined at high temperature to form a metal oxide layer, and the metal is saturated using a saturated dye solution. After coating the dye on the oxide layer, a process of forming a counter-sensing solar cell by forming a counter electrode and a partition wall, and introducing an electrolyte will be described.

3 is a flowchart illustrating a process of manufacturing a dye-sensitized solar cell including a dye-adsorbed metal oxide layer coated with a dye using a saturated dye solution according to another embodiment of the present invention.

1 and 3, a paste such as, for example, terpineol or the like is applied onto the transparent conductive substrate 102 (step 302). Here, the transparent conductive substrate 202 may be formed using, for example, ZnO doped with ITO, FTO, ZnO, undoped SnO 2, Al, or the like, and the transparent conductive substrate 102 may be formed by, for example. For example, it can be formed through a method such as sputtering, electroless deposition, vacuum deposition, CVD, the use of nano-powder according to the sol-gel method, post-paste heat treatment.

The paste-coated transparent conductive substrate 102 is calcined at high temperature to burn all the organic materials included in the paste to form a metal oxide layer (step 304). Here, the metal oxide layer may be formed of, for example, TiO 2, and particularly preferably formed of 10-30 nm of TiO 2 nanoparticles.

On the other hand, the metal oxide layer may have a multi-layered structure, for example, after applying a layer containing more than 20nm TiO2, and after applying a nanoparticle paste of about 20nm on top of it, each of them separately high temperature baking or at the same time high temperature By firing, a metal oxide layer having a multilayer structure can be formed.

Next, the dye is coated by using a saturated dye solution in which a dye is dissolved in any one or a mixture of an alcohol group solution, a liquid ion salt, and a viscous polymer in a metal oxide layer formed on the transparent conductive substrate 102. By forming the adsorption metal oxide layer 104, an oxide semiconductor electrode of the dye-sensitized solar cell is formed (step 306).

Here, the dye adsorption metal oxide layer is a solution having an alcohol group having a boiling point of at least 100 kPa (for example, ethylene glycol, glycerin, etc.), a liquid ion salt (for example, imidadazole, iodide, etc.), a boiling point. For example, the dye may be dissolved in one of the viscous polymers (eg, polyethylene glycol, etc.) having a temperature range of 60 ° C. to 150 ° C., or a mixture containing at least two of them to saturate the dye. After the resulting saturated dye solution is poured into the metal oxide layer, for example, by pouring it in a time range of, for example, 30 seconds to 10 minutes while maintaining a temperature range of, for example, 80 ° C-250 ° C, For example, it may be produced by cleaning with ethanol or the like. Here, the metal oxide layer may be placed on a hot plate, for example, maintained in a temperature range of 50 ° C. to 150 ° C. in order to effectively perform the dye coating during the dye coating, and the saturated dye solution may be, for example, For example, it may have a concentration range of 10 mM-1 M.

In addition, a counter electrode 106 including a transparent conductive film and a platinum layer is manufactured (step 308), and a partition wall for attaching the oxide semiconductor electrode and the counter electrode is manufactured using, for example, sulfine, polymer itself, or the like. (Step 310). Here, the transparent conductive film can be formed using, for example, a conductive plastic substrate, a metal substrate, or the like.

Subsequently, the counter electrode 106 is aligned with the result of step 306 and then attached through the partition 108 (step 312). Here, the oxide semiconductor electrode and the counter electrode 106 may be spaced apart from each other by a predetermined distance, and then may be attached by heating with sulfene, the polymer itself, or the like.

Subsequently, the redox electrolyte 110 is filled in the spaces attached through the partition 108 to manufacture a dye-sensitized solar cell (step 314).

Meanwhile, in another embodiment of the present invention described above, after the oxide semiconductor electrode is manufactured through the steps 302 to 306, the counter electrode 106 is manufactured and the partition 108 is manufactured. It is to be understood that the electrode, the counter electrode 106, and the partition 108 are each manufactured regardless of the manufacturing order thereof.

Therefore, in the case of the dye adsorption metal oxide layer constituting the semiconductor electrode of the dye-sensitized solar cell, the metal oxide is prepared using a saturated dye solution in which a dye is dissolved in any one or a mixture of an alcohol group solution, a liquid ion salt, and a viscous polymer. By coating the dye on the layer, the manufacturing time of the dye-sensitized solar cell can be reduced.

When manufacturing a dye-sensitized solar cell through this manufacturing process, the effect is that TiO2 paste is used as the metal oxide of the oxide semiconductor electrode as one electrode, and for example, doctor blades, screen printing, etc. are used on conductive glass plates such as FTO. The TIO2 paste was applied in a manner, and the substrate to which the paste was applied was heat-treated (high temperature firing) at 450 kPa for about 30 minutes to burn all the organics. Here, the TiO 2 / conductive glass substrate is placed on a hot plate and the temperature is set at approximately 100 kPa.

Then, the prepared saturated dye solution is placed on the metal oxide and flowed down. After approximately one minute has elapsed, an oxide semiconductor electrode including the dye adsorption metal oxide layer is prepared by cleaning with ethanol and drying.

In addition, the opposite electrode, which is the opposite electrode of the oxide semiconductor electrode, uses an ITO / PET electrode coated with Pt (platinum), adheres the two electrodes using a surlyn or the polymer itself, and then uses a syringe between them. The redox electrolyte is introduced into the space. Here, the redox electrolyte is, for example, an iodine-based redox liquid electrolyte, for example, 0.7M of 1-vinyl-3-methyloctyl-imidazolium iodide (1-vinyl-3-hexyl- imidazolium iodide), an electrolyte solution of I3- / I- dissolved 0.1M LiI, 40mM I * 2 (Iodine) in 3-Methoxypropionitrile, and a small amount of pyridine and guar Guanidium thiocyanate may be added.

The dye-sensitized solar cell manufactured by such a process has a very high efficiency with the efficiency of about 9% or more.

In the foregoing description, various embodiments of the present invention have been described and described. However, the present invention is not necessarily limited thereto, and a person having ordinary skill in the art to which the present invention pertains can make various changes without departing from the technical spirit of the present invention. It will be readily appreciated that branch substitutions, modifications and variations are possible.

102 transparent conductive substrate 104 dye adsorption metal oxide layer
106: counter electrode 108: partition wall
110: redox electrolyte 202: transparent conductive substrate
204: paste 204a: metal oxide layer
204b: dye adsorption metal oxide layer

Claims (23)

An oxide semiconductor electrode comprising a transparent conductive substrate and a dye adsorption metal oxide layer coated with a dye using a saturated dye solution having a saturated concentration on the transparent conductive substrate;
A counter electrode corresponding to the oxide semiconductor electrode and including a transparent conductive film and a platinum layer;
It includes a redox electrolyte filled in the space between the oxide semiconductor electrode and the opposite electrode attached through the partition wall
Dye-sensitized solar cells. The method of claim 1,
The saturated dye solution may be prepared by using the dye to have the saturation concentration by using an alcohol group solution, a liquid ion salt, a polymer having a boiling point of 60 ° C. to 150 ° C. or a mixture containing at least two of them as a solvent. Manufactured by dissolving
Dye-sensitized solar cells. The method of claim 2,
The saturated dye solution has a concentration range of 10 mM-1 M
Dye-sensitized solar cells. The method of claim 3, wherein
The alcohol group solution includes ethylene glycol or glycerol
Dye-sensitized solar cells. The method of claim 3, wherein
The liquid ionic salt includes imidazolium iodide
Dye-sensitized solar cells. The method of claim 3, wherein
The polymer having the viscosity includes polyethylene glycol
Dye-sensitized solar cells. The method according to any one of claims 1 to 6,
The dye adsorption metal oxide layer is prepared by flowing the saturated dye solution into the metal oxide layer over a time range of 30 seconds to 10 minutes while maintaining a temperature range of 80 ° C to 250 ° C.
Dye-sensitized solar cells. Preparing an oxide semiconductor electrode by coating a dye using a saturated dye solution having a saturated concentration on a metal oxide layer formed on the transparent conductive substrate to form a dye adsorption metal oxide layer;
Preparing a counter electrode corresponding to the prepared oxide semiconductor electrode;
Aligning the oxide semiconductor electrode and the opposite electrode and then attaching the oxide semiconductor electrode through the partition wall;
Filling a space between the oxide semiconductor electrode and the counter electrode with a redox electrolyte;
Method for producing a dye-sensitized solar cell. The method of claim 8,
The step of manufacturing the oxide semiconductor electrode,
Dissolving the dye so as to have the saturation concentration by using an alcohol group solution, a liquid ion salt, a boiling point of 60 ° C. to 150 ° C. as a solvent, or a mixture containing at least two of them;
Coating the dye by flowing the saturated dye solution in which the dye is dissolved into the metal oxide layer;
Cleaning after the coating of the dye
Method for producing a dye-sensitized solar cell. The method of claim 9,
The saturated dye solution has a concentration range of 10 mM-1 M
Method for producing a dye-sensitized solar cell. The method of claim 10,
The alcohol group solution includes ethylene glycol or glycerol
Method for producing a dye-sensitized solar cell. The method of claim 10,
The liquid ionic salt includes imidazolium iodide
Method for producing a dye-sensitized solar cell. The method of claim 10,
The polymer having the viscosity includes polyethylene glycol
Method for producing a dye-sensitized solar cell. 14. The method according to any one of claims 9 to 13,
The cleaning step is performed using ethanol
Method for producing a dye-sensitized solar cell. 14. The method according to any one of claims 9 to 13,
Coating the dye is carried out according to a time range of 30 seconds to 10 minutes while maintaining a temperature range of 80 ℃-250 ℃
Method for producing a dye-sensitized solar cell. Dissolving the dye to have a saturation concentration by using a solvent containing one or a mixture of at least two of the alcohol group solution, the liquid ionic salt and the boiling point of 60 ° C. to 150 ° C .;
Coating the dye by flowing a saturated dye solution in which the dye is dissolved into a metal oxide layer to form a dye adsorption metal oxide layer constituting a dye-sensitized solar cell;
Dye coating method of metal oxide layer. 17. The method of claim 16,
The dye coating method,
Cleaning and drying after forming the dye adsorption metal oxide layer further;
Dye coating method of metal oxide layer. The method of claim 17,
The saturated dye solution has a concentration range of 10 mM-1 M
Dye coating method of metal oxide layer. The method of claim 18,
Forming the dye adsorption metal oxide layer is carried out according to a time range of 30 seconds to 10 minutes while maintaining a temperature range of 80 ℃-250 ℃
Dye coating method of metal oxide layer. 20. The method according to any one of claims 16 to 19,
The alcohol group solution includes ethylene glycol or glycerol
Dye coating method of metal oxide layer. 20. The method according to any one of claims 16 to 19,
The liquid ionic salt includes imidazolium iodide
Dye coating method of metal oxide layer. 20. The method according to any one of claims 16 to 19,
The polymer having the viscosity includes polyethylene glycol
Dye coating method of metal oxide layer. 20. The method according to any one of claims 16 to 19,
The cleaning and drying step, the cleaning using ethanol
Dye coating method of metal oxide layer.

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