CN115641999A - Preparation method of self-cracking template for metal grid transparent electrode - Google Patents
Preparation method of self-cracking template for metal grid transparent electrode Download PDFInfo
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- CN115641999A CN115641999A CN202211287431.1A CN202211287431A CN115641999A CN 115641999 A CN115641999 A CN 115641999A CN 202211287431 A CN202211287431 A CN 202211287431A CN 115641999 A CN115641999 A CN 115641999A
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Abstract
The invention discloses a preparation method of a self-cracking template for a metal grid transparent electrode, which comprises the following steps of firstly dissolving or dispersing a bonding layer material in a solvent 1 to obtain a solution 1; forming a film on a substrate by using the solution 1 to uniformly adhere an adhesive layer on the surface of the substrate; dissolving or dispersing tannic acid by using a solvent 2 to obtain a tannic acid solution; the tannic acid is a core material formed by a self-cracking pattern, the tannic acid solution is dried on the surface of the bonding layer to form the self-cracking pattern, and the self-cracking pattern can be used for preparing a metal grid transparent electrode by combining magnetron sputtering and stripping; the tannin serving as the cracking template material is easy to remove and peel off, and the bonding layer is combined to ensure that cracking patterns can be formed on various substrates, so that the method is suitable for various substrates, simple in preparation method, capable of being prepared in a large area and wide in applicability.
Description
Technical Field
The invention relates to the technical field of preparation of metal grid transparent electrodes, in particular to a preparation method of a self-cracking template for a metal grid transparent electrode.
Background
The transparent electrode has the characteristics of transparency and conductivity, and is an important component in the photoelectric conversion device. The preparation method is widely applied to the fields of solar cells, light-emitting diodes, touch screens, intelligent glass and the like. The commercial transparent electrode is Indium Tin Oxide (ITO) and has excellent photoelectric properties, and a sheet resistance (Rs) of 15 Ω/sq at a light transmittance (T) of 90%. However, ITO is brittle, not resistant to bending, and relatively costly, and is limited in its application in flexible devices.
Metal Mesh Transparent Electrodes (MMTEs) are a new generation of Transparent electrode materials. It has excellent conductivity of metal and can adjust light transmittance by changing porosity. Silver and copper have the highest and second conductivity of metals and are commonly used as metal mesh transparent electrode materials. The metal grid formed by metal wire spin coating and spray coating has the problems of large surface roughness and poor metal wire contact, and additional welding operation is often needed. The reticular metal wires in the same plane can be obtained by the reticular pattern or the reticular groove pattern. The transparent electrode has small surface roughness and good contact between metal wires, thereby having wide application prospect. The mesh pattern is etched by wet etching or dry etching to remove portions not covered by the mask, thereby forming metal grids (ACS Nano,2014,4782, ACS Nano,2015,9, 2502). In the strategy of preparing the metal grid by the mesh pattern, the wet etching is less in applicable metal types, and the dry etching is higher in cost. The mesh grooves can also be combined with metallization (such as physical vapor deposition metal, magnetron sputtering metal) and lift-off (lift-off) processes to obtain a metal mesh transparent electrode. Its advantages are high metal wire height, and no limitation to metal types. In the prior art, the Materials used as the mesh-type groove template mainly include egg white and nail polish (mainly comprising polyacrylate polymers, 2016,1, 1600095).
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a preparation method of a self-cracking template for a metal grid transparent electrode.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the preparation method of the self-cracking template for the metal grid transparent electrode is designed by taking tannic acid as a cracking material; firstly, dissolving or dispersing a bonding layer material by a solvent 1 to obtain a solution 1; forming a film on a substrate by using the solution 1 to uniformly adhere an adhesive layer on the surface of the substrate; dissolving or dispersing tannic acid by using a solvent 2 to obtain a tannic acid solution; the tannic acid is a core material formed by a self-cracking pattern, the tannic acid solution is dried on the surface of the bonding layer to form the self-cracking pattern, and the self-cracking pattern can be used for preparing the metal grid transparent electrode by combining magnetron sputtering and stripping.
Preferably, the substrate is one of glass, polyethylene terephthalate, polyimide and polyethylene naphthalate.
Preferably, the solvent 1 and the solvent 2 are both one of water, ethanol, N, N-dimethylformamide and chloroform.
Preferably, the bonding layer material is one of konjac gum, gum arabic, polyvinyl alcohol, polyacrylonitrile, polyvinyl butyral, polystyrene and polymethyl methacrylate.
The invention has the beneficial effects that:
1. the tannin used as the cracking template material is easy to remove and strip, the preparation method is simple and easy, and the large-area preparation can be realized; and the tannin is combined with the bonding layer to enable the cracking pattern to be formed on various substrates, so that the method is suitable for various substrates with rigidity, flexibility and the like, can be used for preparing flexible transparent electrodes, and has wide applicability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention.
FIG. 1 is a schematic diagram of the steps performed in the present invention;
FIG. 2 is a scanning electron microscope image of the self-crazing template of the present invention;
FIG. 3 is a scanning electron microscope image of a metal grid transparent electrode obtained by subsequent magnetron sputtering and stripping through the self-cracking template of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1-3, wherein fig. 1 illustrates a preparation method of a self-cracking template for a metal grid transparent electrode, specifically, a solvent 1 is first dissolved or dispersed in a bonding layer material to obtain a solution 1; forming a film on a substrate by using the solution 1 to enable the surface of the substrate to be uniformly adhered with an adhesive layer; dissolving or dispersing tannic acid by using a solvent 2 to obtain a tannic acid solution; the tannic acid is a core material formed by self-cracking patterns, the tannic acid solution is dried on the surface of the bonding layer to form the self-cracking patterns, and the self-cracking patterns can be used for preparing the metal grid transparent electrode by combining magnetron sputtering and stripping.
The tannin used as the cracking template material is easy to remove and peel off, the preparation method is simple and easy, and the large-area preparation can be realized. The tannin is combined with the bonding layer to enable the cracking patterns to be formed on various substrates, the method is suitable for various substrates with rigidity, flexibility and the like, can be used for preparing flexible transparent electrodes, and has wide applicability.
As a preferred embodiment of the present invention, it may also have the following additional technical features:
in this embodiment, the substrate is one of glass, polyethylene terephthalate, polyimide, and polyethylene naphthalate.
In this embodiment, the solvent 1 and the solvent 2 are both one of water, ethanol, N-dimethylformamide and chloroform.
In this embodiment, the bonding layer material is one of konjac gum, gum arabic, polyvinyl alcohol, polyacrylonitrile, polyvinyl butyral, polystyrene, and polymethyl methacrylate.
Example 1
0.02g of polyvinyl alcohol was dissolved in 1mL of water. And (3) forming a film on a glass sheet by spin coating of the polyvinyl alcohol solution, and drying. 0.2g of tannic acid was dissolved in 1mL of water. The tannic acid solution is coated on the surface of polyvinyl alcohol in a spinning mode to form a self-cracking template. The metal grid transparent electrode obtained by combining the cracking template in the embodiment 1 with magnetron sputtering and stripping has the metal wire line width in the micrometer order of magnitude, the light transmittance of about 80 percent and the square resistance of less than 10 omega/sq.
Example 2
0.02g of polyacrylonitrile was dissolved in 1mL of N, N-dimethylformamide. The polyacrylonitrile solution is formed into a film on the polyethylene glycol terephthalate by a pulling method and is dried. 0.2g of tannic acid was dispersed in 1mL of water. The tannic acid solution is dripped on the surface of polyacrylonitrile to form a self-cracking template. The metal grid transparent electrode obtained by combining the cracking template of the embodiment 2 with magnetron sputtering and stripping has the metal wire line width of micron order, the light transmittance of about 80 percent and the square resistance of less than 10 omega/sq. The square resistance change rate is less than 30% after bending 1000 times (bending radius is 2 mm), and the square resistance change rate is less than 20% after 3M adhesive tape adhesion/stripping 100 times.
Example 3
0.02g of polymethyl methacrylate was dissolved in 1mL of chloroform. The polymethyl methacrylate solution is formed into a film on the polyimide by a pulling method and dried. 0.2g of tannic acid was dissolved in 1mL of water. The tannic acid solution forms a self-cracking template on the surface of the polymethyl methacrylate by a blade coating method. The metal grid transparent electrode obtained by combining the cracking template in the embodiment 3 with magnetron sputtering and stripping has the metal wire line width in the micrometer order of magnitude, the light transmittance of about 80 percent and the square resistance of less than 10 omega/sq. The sheet resistance change rate is less than 30% after bending 1000 times (bending radius is 2 mm), and the sheet resistance change rate is less than 20% after 3M adhesive tape adhesion/stripping 100 times.
Example 4
0.03g of polyvinyl butyral is dissolved in 1mL of ethanol. The polyvinyl butyral solution is formed into a film on a glass sheet by a pulling method and is dried. 0.2g of tannic acid was dissolved in 1mL of water. The tannic acid solution forms a self-cracking template on the surface of the polyvinyl butyral through a blade coating method. The metal grid transparent electrode obtained by combining the cracking template of the embodiment 4 with magnetron sputtering and stripping has the metal wire line width of micron order, the light transmittance of about 80 percent and the square resistance of less than 10 omega/sq.
Example 5
0.03g of polyvinyl butyral are dissolved in 1mL of ethanol. And forming a film on the polyimide by the polyvinyl butyral solution through a pulling method, and drying. 0.5g of tannic acid was dissolved in 1mL of water. The tannic acid is coated on the surface of the polyvinyl butyral in a spinning mode to form a self-cracking template. The metal grid transparent electrode obtained by combining the cracking template of the embodiment 5 with magnetron sputtering and stripping has the metal wire line width of micron order, the light transmittance of about 80 percent and the square resistance of less than 10 omega/sq. The square resistance change rate is less than 30% after bending 1000 times (bending radius is 2 mm), and the square resistance change rate is less than 20% after 3M adhesive tape adhesion/stripping 100 times.
The metal grid transparent electrode is prepared by taking tannic acid as a core material formed by a self-cracking pattern and combining the self-cracking pattern with magnetron sputtering and stripping, and has better bending resistance and stripping resistance.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
The above description is only a preferred embodiment of the present invention, and all technical solutions that can achieve the object of the present invention by substantially the same means are within the protection scope of the present invention.
Claims (4)
1. A preparation method of a self-cracking template for a metal grid transparent electrode is characterized by comprising the following steps: firstly, dissolving or dispersing a bonding layer material by a solvent 1 to obtain a solution 1; forming a film on the substrate by using the solution 1 to uniformly adhere an adhesive layer on the surface of the substrate; dissolving or dispersing tannic acid by using a solvent 2 to obtain a tannic acid solution; the tannic acid is a core material formed by self-cracking patterns, the tannic acid solution is dried on the surface of the bonding layer to form the self-cracking patterns, and the self-cracking patterns can be used for preparing the metal grid transparent electrode by combining magnetron sputtering and stripping.
2. The method for preparing the self-cracking template for the metal grid transparent electrode according to claim 1, wherein the self-cracking template comprises the following steps: the substrate is one of glass, polyethylene terephthalate, polyimide and polyethylene naphthalate.
3. The method for preparing the self-cracking template for the metal grid transparent electrode according to claim 1, wherein the self-cracking template comprises the following steps: the solvent 1 and the solvent 2 are both one of water, ethanol, N, N-dimethylformamide and chloroform.
4. The method for preparing the self-cracking template for the metal grid transparent electrode according to claim 1, wherein the self-cracking template comprises the following steps: the bonding layer is made of one of konjac glucomannan, gum arabic, polyvinyl alcohol, polyacrylonitrile, polyvinyl butyral, polystyrene and polymethyl methacrylate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211287431.1A CN115641999A (en) | 2022-10-20 | 2022-10-20 | Preparation method of self-cracking template for metal grid transparent electrode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211287431.1A CN115641999A (en) | 2022-10-20 | 2022-10-20 | Preparation method of self-cracking template for metal grid transparent electrode |
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| CN115641999A true CN115641999A (en) | 2023-01-24 |
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| CN202211287431.1A Pending CN115641999A (en) | 2022-10-20 | 2022-10-20 | Preparation method of self-cracking template for metal grid transparent electrode |
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