TW201338178A - A transparent electrode and method of manufacturing the same - Google Patents

Abstract

The present invention discloses a transparent electrode with high light transmittance and method of manufacturing the same, which can be applied to opto-electrical product such as dye sensitized solar cell. It mainly comprises a transparent substrate and a platinum composite layer. The platinum composite layer is prepared by a wet chemical method, which is consisted of a transparent conducting oxide solution and a platinum compound, thus increasing the conductivity and improving the contact ability of the platinum composite layer with other materials. Moreover, the disclosed transparent electrode has a high visible-light transmittance as well as a simple and rapid fabrication method with reduction of the amount of used platinum.

Description

Transparent electrode and manufacturing method thereof

The invention relates to a transparent electrode, in particular to a transparent electrode using a metal composite material, which has a high light transmittance in the visible light region and can be used for a transparent photovoltaic element product, such as a glass window applied to a building, Floor-to-ceiling windows, windows and glass for public transport.

A transparent conductive film is a composite film having a specific function, which is defined as having an average transmittance of about 80% or more in the visible range (wavelength 380-760 nm, 1 nm=10-9 m), and its resistance. The rate is lower than 1 × 10 ^-3 Ω-cm. Transparent conductive film has been used for heating and defogging in the early days, and has been used in the modern optoelectronic industry, for example, in various flat panel displays (FPD), touch panels (light panels), and light-transmissive glass for building energy. The conductive electrode is also an important thin film layer of the solar cell. The most commonly used transparent conductive film material, Indium Tin Oxide (ITO), has excellent properties and is widely used in flat panel displays.

In addition, with the wave of green buildings sweeping across the globe, building integrated photovoltaics (BIPV) with photovoltaic panels combined with building materials, and after 2000, from building exteriors, sun visors, shelters, and even Windows, you can see the footprint of solar power. At present, there are two types of See-Through type 矽-based solar cells applied to windows. One is to use a laser to remove a portion of the back metal electrode and the solar cell area that is shielded from light to achieve partial light transmission. The effects of U.S. Patent Nos. 6,584,461, 5,254,179 and 6,858,461 disclose the use of lasers to selectively remove portions of the opaque layer and adjust the spacing between the lines to change the optical transparency in one degree of space. Another method is to reduce the thickness of the absorbing layer, and to control the suitable thickness of the absorbing layer of different materials, thereby correcting the penetration spectrum, as disclosed in the Republic of China Patent Publication No. 201115763, when the absorbing layer material is a-SiGe, When the thickness is 100 nm, the average transmittance at a visible light wavelength of 380 nm to 780 nm is 26.8%.

Dye-sensitized solar cells (DSSCs) are semitransparent in comparison to bismuth-based solar cells, so they are suitable for the integration of building window materials and functions as shading, heat insulation and power generation. To achieve the dual energy efficiency of building energy efficiency and production capacity, it is likely to become a widely used solar energy utilization technology for the next generation.

At present, the opposite electrode in the dye-sensitized solar cell is preferably deposited by sputtering on a 0.2 to 2 μm platinum film on the FTO glass. The opposite electrode has the advantages of good catalytic effect, high conductivity and light reflection effect, but is not permeable to light. When used as a transparent electrode, it affects the overall visible light transmittance, making it impossible to be effectively applied to construction. Glass windows, floor-to-ceiling windows, windows and windows of public transportation vehicles.

For the purpose of transparency, in 1997, Papageorgiou et al. proposed "An Iodine/Triiodide Reduction Electrocatalyst for Aqueous and Organic Media" in the journal J. Electrochem. Soc. A transparent electrode was prepared by platinum pyrolysis. In this manner, a 5 mM H ₂ PtCl ₆ isopropanol solution was applied onto a transparent conductive substrate by spin coating, and then reduced to platinum by sintering at 380 ° C for 30 minutes. The amount of platinum required to prepare the opposite electrode in this manner is relatively small (about 10-100 μg cm ^-2 ), has excellent catalytic properties, and has a high transmittance (~80%) in visible light.

In addition to platinum electrodes, carbon nanotubes are also the materials most commonly used to replace platinum electrodes as transparent electrodes. In 2003, K. Imoto et al. proposed "High-performance carbon counter electrode for dye-sensitized solar cells" in the journal Sol. Energy Mater. Sol. Cell, that is, using a carbon nanotube as a transparent electrode. Due to the high transmittance (~80%) of the carbon nanotube film, it can be applied to dye-sensitized solar cells to achieve translucency. However, the catalytic properties and conductivity of carbon materials are still worse than platinum.

In addition, Taiwan Patent Publication No. 201021222, entitled "Metal Thin Film Electrode of Solar Cell and Method of Forming the Same", discloses a lithography technique for improving the electrode of a metal thin film via a process of a transparent hole array. Light penetration rate. However, its process technology is more complicated and the production cost is higher.

In view of the above, the inventors of the present invention have carefully studied and proposed a transparent electrode and a manufacturing method thereof, and can effectively eliminate the disadvantages of conventionally preparing a transparent electrode, and provide a simple and rapid method for producing a high visible light region. The relative electrode of the penetration rate reduces the amount of platinum used and improves the ability to contact other materials.

The present invention mainly provides a transparent electrode which has a high transmittance in the visible light region.

The invention also provides a method for manufacturing a transparent electrode, which is a transparent electrode prepared by a simple and rapid method, which can reduce the amount of platinum used.

For the main purpose of the present invention, a transparent electrode comprising at least: a transparent substrate and a platinum composite layer. The platinum composite layer is prepared by a wet chemical method, which is formed by combining a transparent conductive sol with a platinum compound, which has a high electrical conductivity.

According to one feature of the transparent electrode of the present invention, the platinum Pt accounts for between 0.1% and 4% of the total content of the transparent conductive sol and the platinum compound, and the transparent electrode transmits light in the visible light range. The rate is between 55% and 80%.

In order to achieve another object of the present invention, the present invention provides a method for producing a transparent electrode, which mainly comprises the steps of: chemically synthesizing a platinum compound, two or more organometallic compounds and a hydrocarbon into one In the reaction system, the temperature of the reaction system is between 25 ° C and 100 ° C; forming a sol consisting of the platinum compound, the organometallic compound and the hydrocarbon; the sol is impregnated Depositing on a transparent substrate by spin coating or spraying; and heating the sol at a temperature to form a dense structure in which the platinum particles are embedded in a transparent conductive oxide; wherein the temperature is between Between 200 ° C and 600 ° C.

According to a feature of the method for producing a transparent electrode of the present invention, the two or more organometallic compounds are subjected to a hydrolysis condensation reaction to form a conductive compound.

The transparent electrode of the present invention has the following effects:

1. The transparent electrode can greatly reduce the amount of platinum Pt used, and reduce the manufacturing cost of the photovoltaic element.

2. The light transmittance of the transparent electrode can be effectively applied to the glass windows of the building, the floor-to-ceiling windows, the windows and the glass of the public transportation vehicle.

3. The transparent electrode is produced in a simple and rapid manner, and thus can be produced in a large area.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

While the invention may be embodied in various forms, the embodiments illustrated in the drawings It is not intended to limit the invention to the particular embodiments illustrated and/or described.

Please refer to FIG. 1 , which is a schematic view showing a first embodiment of a transparent electrode 100 of the present invention, which mainly includes a transparent substrate 110 and a platinum composite layer 130 . The transparent substrate 110 is selected from one of a glass substrate, a plastic substrate, and a flexible substrate. Preferably, the transparent substrate 110 is a glass substrate. The platinum composite layer 130 is coated on the surface of the transparent substrate 110. The platinum composite layer 130 is composed of a transparent conductive oxide 131 and a platinum particle 132 embedded in the transparent conductive oxide 132. The platinum composite layer 130 is prepared by a wet chemical method and is formed by combining a transparent conductive sol with a platinum compound. By the addition of the transparent conductive sol, the amount of the platinum compound can be effectively reduced and the conductivity of the platinum composite layer 130 can be improved.

Please refer to FIG. 2 , which is a schematic structural view of a second embodiment of the transparent electrode 100 of the present invention, which mainly includes a transparent substrate 110 , a transparent conductive layer 120 and a platinum composite layer 130 . Similar to the first embodiment, the transparent substrate 110 and the platinum composite layer 130 further comprise a transparent conductive layer 120. The transparent conductive layer 120 is coated on the surface of the transparent substrate 110. It should be noted that the transparent conductive layer 120 can increase the coating ability of the platinum composite layer 130 in the present invention. The transparent conductive layer 120 is coated on the transparent substrate 110 to form a transparent conductive substrate. The conductive substrate may be a tin-doped indium oxide (ITO) coated glass substrate, a fluorine-doped tin oxide (FTO) coated glass substrate, and an aluminum-doped zinc oxide film. (aluminum-doped zinc oxide, AZO) coated glass substrate, antimony-doped tin oxide (ATO) coated glass substrate, gallium-doped zinc oxide (AZO) The glass substrate, the ITO-coated soft substrate, and the FTO-coated flexible substrate may be electrically conductive metals such as stainless steel. Preferably, in the present invention, the use of a fluorine-doped tin oxide film increases the conductivity of the conductive substrate.

On the other hand, if the selected transparent conductive sol and the transparent conductive layer 120 are made of the same material, the platinum composite layer 130 has a better coating ability when applied to the transparent conductive layer 120.

The manner in which the platinum electrode is typically prepared is selected from a physical or chemical manner to deposit a layer of platinum. The physical method uses sputtering, evaporation or physical vapor deposition to uniformly deposit platinum onto a transparent conductive substrate to obtain a counter electrode. The chemical method is to apply H ₂ PtCl ₆ to a transparent conductive substrate by spin coating, spraying or dipping, and after baking at a temperature of 380 ° C or higher, a platinum electrode can be obtained. The platinum electrodes prepared by the above-mentioned several common methods all form a uniform and dense platinum continuous film, and such a dense platinum continuous film can seriously block the penetration of light.

Referring to FIG. 1 and FIG. 2, a transparent electrode 100 according to the present invention, wherein in the platinum composite layer 130, the transparent conductive sol forms a composition formula of -(MOM) _x- via a hydrolysis condensation reaction. Dense structure. Since the platinum compound does not react with the transparent conductive sol, the platinum particles 132 are precipitated in the transparent conductive oxide 131 formed by the transparent conductive sol during the film formation, and thus uniformly dispersed in the transparent conductive oxide 131. In the resulting structure, a discontinuous film is formed. Since the platinum composite layer 130 is a discontinuous film, the shielding of light can be reduced, so that the light penetration can be effectively increased.

When the thickness of the platinum composite layer 130 is too small, the platinum content thereof is too small, and the conductivity thereof is lowered, which affects the application of the photovoltaic element; when the thickness of the platinum composite layer 130 is too large, the amount of platinum is wasted on the other hand, on the other hand The visible light transmittance of the transparent electrode 100 is lowered. The thickness of the platinum composite layer 130 is between 10 nm and 800 nm, preferably between 100 nm and 300 nm. The thickness of the transparent conductive layer 120 is between 10 nm and 300 nm, preferably between 50 nm and 100 nm.

Wherein, the solid content of the platinum Pt in the platinum compound is between 0.1% and 4% of the total amount of the transparent conductive sol and the platinum compound, and therefore, the transmittance of the transparent electrode 100 in the visible light range is Between 55% and 80%.

The platinum Pt is also related to the solid content of the transparent conductive sol and the total amount of the platinum compound in the visible light transmittance of the transparent electrode 100. When the solid content of platinum Pt is 0.5%, the visible light transmittance of the transparent electrode 100 is about 80%; when the solid content of the platinum Pt is 2%, the visible light transmittance of the transparent electrode 100 is about 70%. When the solid content of the platinum Pt is 4%, the visible light transmittance of the transparent electrode 100 is reduced by 55%.

Referring now to FIG. 3, there is shown a method of manufacturing the platinum composite layer 130 of a transparent electrode of the present invention, the steps of which include:

(1) chemically synthesizing a platinum compound, two or more organometallic compounds and a hydrocarbon into a reaction system, the temperature of the reaction system is between 25 ° C and 100 ° C;

(2) forming a sol formed by combining the platinum compound, the organometallic compound and the hydrocarbon, wherein the organometallic compound forms a transparent conductive sol via a hydrolysis condensation reaction, wherein the transparent conductive sol is passed through a viscous condensation reaction to form a uniform dense structure, and the platinum compound is uniformly dispersed in the dense structure formed by the transparent conductive sol;

(3) depositing the sol on a transparent substrate 110 containing a transparent conductive layer 120 by dipping, spin coating or spray coating;

(4) heating the sol at a temperature to form a platinum composite layer 130 embedded in a transparent conductive oxide; wherein the temperature is between 200 ° C and 600 ° C, and the optimum temperature is At 500 ° C, at this temperature, the organic matter in the sol can be fully reacted completely and removed.

It should be noted that in the step (3), the sol may also be deposited on the transparent substrate 110 containing a transparent conductive layer 120 by dipping, spin coating or spraying. That is, a transparent conductive layer 120 is deposited on the transparent substrate 110. The heating may be performed by using a laser, a UV light, or a conventionally ventilated or non-ventilated furnace tube, or a rapid annealing furnace.

The platinum compound is selected from the group consisting of PtO ₂ , PtCl ₂ , PtCl ₄ , Pt(NH ₃ ) ₄ (NO ₃ ) ₂ , H ₂ Pt(OH) ₆ , H ₂ PtCl ₆ and other Pt compounds due to The H ₂ PtCl ₆ system is a liquid material, and the reaction can be uniformly mixed after the above reaction system is added, and therefore it is preferably selected from H ₂ PtCl ₆ .

The organometallic compound is (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , M(OR) _x , M(OR) _xy (R) _y , (OR) _x MOM(OR) _x . Wherein R may be an alkyl group, an alkenyl group, an aryl group, an alkylhalide group, or a hydrogen; M is a metal element selected from the group consisting of indium, tin, antimony, One of aluminum, zinc, gallium, titanium, lanthanum, zirconium, cadmium, platinum, gold, copper; wherein x>y, and x is 1.2.3.4.5, y is 1.2.3.4.5. Further, the hydrocarbon is one of an alcohol, a ketone, an ether, a phenol, an aldehyde, an ester, and an amine. The organometallic compound is one of Ti(OR) ₄ , Zn(OR) ₄ , (NH ₄ ) ₂ Ti(OR) ₂ , CH ₃ Al(OCH ₃ ) ₃ , Sn(OR) ₄ , In(OR) ₃ . The hydrocarbon is one of an alcohol, a ketone, an ether, a phenol, an aldehyde, an ester, and an amine, and is preferably C ₂ H ₅ OH, C ₃ H ₇ OH, C ₄ H _{9 .} OH, CH ₃ OC ₂ H ₅ or CH ₂ O.

It is worth noting that an organic acid or an inorganic acid can be added to the sol, and a uniform dense film is formed by condensation reaction of the organic acid or the inorganic acid with water. The organic acid may be of the formula R-(COOH), (HO)-R-(COOH), (HOOC)-R-(COOH) and (R ₁ O), (R ₂ O)-(POOH). R may be an alkyl group, an alkenyl group, an aryl group, a haloalkyl group or one of hydrogen or an alkynyl group. If R is an alkyl group, the organic acid is an alkanoic acid; if R is an alkenyl group, the organic acid is an olefinic acid; if R is an aryl group, the organic acid is an aromatic acid; and if R is a haloalkyl group, the organic acid is Haloalkanic acid; if R is hydrogen, the organic acid is formic acid; if R is alkynyl, the organic acid is acetylenic acid. The inorganic acid may be one of hydrochloric acid, nitric acid or sulfuric acid.

The two or more organometallic compounds are subjected to a hydrolysis condensation reaction to form a conductive compound. When the metal element M is selected to be indium and tin, a tin-doped indium oxide compound can be obtained through a hydrolysis condensation reaction; when the metal element M is selected from fluorine and tin, a fluorine-doped tin oxide can be obtained through a hydrolysis condensation reaction. When the metal element M is selected from aluminum and zinc, the aluminum-doped zinc oxide compound can be obtained through a hydrolysis condensation reaction; when the metal element M is selected from the group consisting of cerium and zinc, the cerium is obtained by a hydrolysis condensation reaction. Zinc oxide compound; when the metal element M is selected to be gallium and zinc, a gallium-doped zinc oxide compound can be obtained through a hydrolysis condensation reaction.

The sol may further comprise a protecting group to allow stable storage of the sol. The chemical formula of the protecting group is A-(CO-B-CO)-C, which allows the nano ceramic solution to be stably stored. Among them, the A group may be one of an alkyl group, an alkenyl group, an aryl group, a haloalkyl group, a hydrogen group, and an alkynyl group. The B system may be one of an alkyl group, an alkenyl group, an aryl group, a haloalkyl group, a hydrogen group, and an alkynyl group. The C system may be one of an alkyl group, an alkenyl group, an aryl group, a haloalkyl group, a hydrogen group, and an alkynyl group.

The transparent conductive sol is one of two or more kinds of metal oxides, and is condensed with water by an organic acid or an inorganic acid to form a transparent conductive sol having a protective group. The transparent conductive sol is allowed to be stably stored.

When the platinum compound is mixed with the transparent conductive sol, it does not participate in the reaction. When the mixed sol is applied onto the transparent substrate 110, after sintering at a temperature of 500 ° C, the platinum compound 132 reacts to become discontinuous uniform platinum particles 132. Dispersed in the transparent conductive oxide 131. Since the platinum composite layer 130 is a discontinuous film, the light shielding effect is not obvious, so that the light transmittance of the platinum composite layer 130 in visible light can be increased to 80%.

The synthesis method is a sol-gel method in a wet chemical method, and the film process is a dip-coating, a spin-coating, or a spray-coating method. First, it is a simple, rapid and large-area preparation method, which has great potential for commercial mass production in the future. A common spin coating method is to uniformly coat a solution on a substrate by means of a spin coating. The common immersion plating method is a method of immersing a substrate into a tank containing a coating solution, and then, after the immersion is completed, the substrate is dropped into the tank by a cantilever or a tray to obtain an excess coating solution. The effect of recycling, and this type of coating can be handled by batch using the transportation belt, which is quite convenient. However, in this way, considerable care must be taken to control the circulation, filtration, and temperature and viscosity of the coating solution.

It should be noted that the film forming method of the transparent conductive layer 120 may be a well-known vacuum evaporation method, a sputtering method or a wet chemical method. Among the heating methods of the vacuum vapor deposition, there are a resistance heating method, an electron beam heating method, and the like, but vapor deposition of a material other than metal is suitable for the electron beam heating method. Further, a method in which a compound as a raw material is formed into a liquid form, and this is applied to a surface and then an oxide film is formed by a desired treatment can be employed. The wet chemical method prepares a chemical sol by a sol-gel method, and then applies it to a substrate by spin coating, spraying or dipping, and finally is baked at a high temperature to prepare a high temperature. In the present invention, the film formation method of the transparent conductive layer 120 is similar to the film formation method of the platinum composite layer 130, the main difference being that no platinum compound is added to the transparent conductive sol.

Please refer to FIG. 4, which is a schematic view showing the light transmittance of the transparent electrode 100 according to the first embodiment of the present invention. According to the first embodiment of the transparent electrode 100 proposed by the present invention, 0.5 g of H ₂ PtCl _{4 is} first taken, 5 g of indium acetoacetate and 0.5 g of acetonitrile acetone are respectively added to 50 g of isopropyl alcohol and placed in The platinum composite sol was obtained by heating at 80 ° C for 3 hours on a hot plate. The platinum composite sol was applied by spraying onto a conductive substrate to form a platinum composite layer having a thickness of about 300 nm. In the present invention, the use of the platinum composite layer 130 can increase the conductivity of the transparent electrode transparent counter electrode 100, and can be completely coated on the conductive substrate without falling off. The transparent electrode transparent electrode 100 has a light transmittance of about 75% in the visible light range. The transparent counter electrode 100 is applied to a dye-sensitized solar cell to measure its electrical property. When the sunlight is incident positively from the working electrode, the current density is 15.1 mA/cm ² and the open circuit voltage is 0.75 V. The factor is 0.65 and the efficiency is 7.3%. However, when sunlight is incident from the direction of the transparent opposite electrode, a current density of 11.8 mA/cm ² , an open circuit voltage of 0.74 V, a fill factor of 0.68, and an efficiency of 5.9% can be obtained. It can be seen that the transparent opposite electrode has a high transmittance and can provide sufficient photon penetration to generate current.

According to a second embodiment of the transparent electrode 100 proposed by the present invention, first, 4 g of H ₂ Pt(OH) ₆ , 5 g of acetonitrile acetone and 0.8 g of fluorinated amine are separately added to 50 g of isopropanol and ethanol. The liquid (isopropyl alcohol: ethanol = 1:1) was placed on a hot plate and heated at 80 ° C for 3 hours to obtain a platinum composite sol. The platinum composite sol was applied by spraying onto a conductive substrate to form a platinum composite layer having a thickness of about 800 nm. However, the transmittance of the transparent electrode 100 of the second embodiment of the present invention is reduced to 48%, and after the platinum composite layer is applied onto the conductive substrate, there is a peeling. After the opposite electrode is assembled to the dye-sensitized solar cell, when the sunlight is incident positively from the working electrode, the current density is 14.3 mA/cm ² , the open circuit voltage is 0.73 V, the fill factor is 0.65, and the efficiency is 6.8%. . However, when sunlight is incident from the direction of the transparent opposite electrode, a current density of 6.3 mA/cm ² , an open circuit voltage of 0.71 V, a fill factor of 0.59, and an efficiency of 2.6% can be obtained.

The invention produces a counter electrode with high transmittance in the visible light region in a simple and rapid manner, and can reduce the amount of platinum used. The high-reflection relative electrode can be used to produce a high-light-transparent dye-sensitized solar cell, which can be effectively applied to glass windows of floor buildings, floor-to-ceiling windows, windows and windows of public transportation vehicles.

In summary, the present invention has the following effects:

1. The high-transparent transparent electrode is fabricated in a simple and rapid manner, which can greatly reduce the amount of Pt used, thereby reducing the manufacturing cost of the transparent photovoltaic element.

2. The light transmittance of the transparent electrode is improved, which can be effectively applied to the glass windows of the building, the floor-to-ceiling windows, the windows and the glass of the public transportation vehicle.

3. The addition of transparent conductive sol can increase the coating ability of platinum on the conductive substrate and increase the conductivity.

While the present invention has been described in its preferred embodiments, it is not intended to limit the scope of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. As explained above, various modifications and variations can be made without departing from the spirit of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Transparent electrode

110. . . Transparent substrate

120. . . Transparent conductive layer

130. . . Platinum composite layer

131. . . Transparent conductive oxide

132. . . Platinum particles

The above and other objects, features, and advantages of the present invention will become more apparent from the <RTIgt;

1 is a schematic structural view showing a first embodiment of a transparent electrode of the present invention;

2 is a schematic structural view showing a second embodiment of the transparent electrode of the present invention;

3 is a flow chart showing a method of manufacturing the platinum composite layer of the transparent electrode of the present invention;

4 is a schematic view showing the light transmittance of the transparent opposite electrode of the present invention.

100. . . Transparent electrode

110. . . Transparent substrate

130. . . Platinum composite layer

131. . . Transparent conductive oxide

132. . . Platinum particles

Claims (10)

A transparent electrode comprising: a transparent substrate; and a platinum composite layer coated on the surface of the transparent substrate; wherein the platinum composite layer is composed of a transparent conductive oxide and a platinum particle embedded in the platinum particle Among the transparent conductive oxides, the transmittance of the transparent electrode in the visible light range is between 55% and 80%. The transparent electrode of claim 1, wherein the transparent electrode further comprises: a transparent conductive layer coated on the surface of the transparent substrate, and the platinum composite layer is coated on the surface of the transparent conductive layer. The transparent electrode according to any one of claims 1 to 2, wherein the platinum composite layer is prepared by a wet chemical method, which is formed by combining a transparent conductive sol and a platinum compound, and the platinum Pt is The solid content is between 0.1% and 4% of the total amount of the transparent conductive sol and the platinum compound. The transparent electrode according to claim 3, wherein the platinum compound is selected from the group consisting of PtO ₂ , PtCl ₂ , PtCl ₄ , Pt(NH ₃ ) ₄ (NO ₃ ) ₂ , H ₂ Pt(OH) ₆ , One of H ₂ PtCl ₆ and other Pt compounds. The transparent electrode according to claim 4, wherein the platinum compound is selected from the group consisting of H ₂ PtCl ₆ . The transparent electrode according to claim 3, wherein the transparent conductive sol forms a uniform structure through a hydrolysis condensation reaction, and the platinum compound is uniformly dispersed in the dense structure formed by the transparent conductive sol, via After heating at a temperature, a platinum composite layer having the platinum particles embedded in the transparent conductive oxide is formed. A method for producing a transparent electrode, which mainly comprises the steps of: chemically synthesizing a platinum compound, two or more organometallic compounds and a hydrocarbon into a reaction system, and the temperature of the reaction system is 25 Between ° C and 100 ° C; forming a sol consisting of the platinum compound, the organometallic compound and the hydrocarbon; depositing the sol on a transparent substrate comprising a transparent conductive layer; Heating the sol at a temperature such that the sol forms a dense structure in which a platinum particle is embedded in a transparent conductive oxide; wherein the sol is deposited on the transparent substrate by one of dipping, spin coating or spray coating. And the temperature is between 200 ° C and 600 ° C. The manufacturing method according to claim 7, wherein the sol is deposited on a transparent substrate comprising a transparent conductive layer to form the platinum composite layer. The manufacturing method of claim 7 or claim 8, wherein the temperature is between 450 ° C and 500 ° C. The manufacturing method according to any one of claims 7 to 8, wherein the platinum compound is preferably selected from the group consisting of H ₂ PtCl ₆ , and the solid content of the platinum Pt accounts for the transparent conductive sol and the platinum compound. The total amount is between 0.1% and 4%.