CN112420931A - Composite structure back electrode for perovskite solar cell - Google Patents
Composite structure back electrode for perovskite solar cell Download PDFInfo
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- CN112420931A CN112420931A CN202011366750.2A CN202011366750A CN112420931A CN 112420931 A CN112420931 A CN 112420931A CN 202011366750 A CN202011366750 A CN 202011366750A CN 112420931 A CN112420931 A CN 112420931A
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- Y02E10/549—Organic PV cells
Abstract
The invention discloses a composite structure back electrode for a perovskite solar cell and a preparation method thereof.
Description
Technical Field
The invention belongs to the technical field of perovskite solar cells, and particularly relates to a composite structure back electrode for a perovskite solar cell.
Background
In recent years, perovskite solar cells have attracted much attention due to their high photoelectric conversion efficiency and low production cost. However, the perovskite solar cell back electrode is generally formed by depositing expensive gold or other expensive noble metal materials, and many metal materials can react with the perovskite materials to cause the failure of the cell device. The carbon electrode is low in cost, but the resistivity of the carbon electrode is much higher than that of the metal electrode, so that the conversion efficiency of the battery device is not high.
Disclosure of Invention
In order to solve the technical problem, the invention provides a composite structure back electrode for a perovskite solar cell.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in one aspect, the present invention discloses a composite structure back electrode for a perovskite solar cell, comprising: the conductive non-metal layer is a carbon layer and/or a TCO layer.
On the basis of the technical scheme, the following improvements can be made:
preferably, the metal layer is compounded on the upper surface of the conductive nonmetal layer.
Preferably, the metal layer is made of a single metal or a composite of a plurality of metals.
Preferably, the thickness of the conductive nonmetal layer is 1nm-200 μm.
Preferably, the metal layer has a thickness of 5nm to 200 μm.
On the other hand, the invention discloses a preparation method of a composite structure back electrode for a perovskite solar cell, which comprises the following steps:
s1) coating the conductive non-metal material on the back of the perovskite solar cell to be provided with the electrode part to form a conductive non-metal layer;
s2) evaporating or sputtering metal on the surface of the conductive non-metal layer to form a metal layer; or, screen printing metal slurry on the conductive non-metal layer to form a metal layer;
s3) forming a composite back electrode in which the conductive non-metal layer and the metal layer are combined.
Preferably, when the conductive non-metallic material is conductive carbon paste, the steps S1) and S2) are specifically as follows:
s1) screen printing the conductive carbon paste on the back of the perovskite solar cell to-be-manufactured electrode part, and drying and curing the printed carbon electrode to form a carbon layer;
s2) depositing or sputtering a metal on the surface of the carbon layer to form a metal layer.
Preferably, when the conductive non-metallic material is TCO, the steps S1) and S2) are specifically as follows:
s1) sputtering TCO on the back of the perovskite solar cell to-be-manufactured electrode part to form a TCO layer;
s2) evaporating or sputtering the metal on the surface of the TCO layer to form a metal layer.
Preferably, when the conductive non-metallic material is TCO, the steps S1) and S2) are specifically as follows:
s1) sputtering TCO on the back of the perovskite solar cell to-be-manufactured electrode part to form a TCO layer;
s2) screen printing a metal conductive paste on the conductive non-metal layer to form a metal layer.
According to the composite structure back electrode for the perovskite solar cell and the preparation method thereof, the composite structure back electrode formed by the metal layer and the carbon layer and/or the TCO layer is simple in structure, simple in process, excellent in conductivity and low in cost, and is suitable for large-scale popularization and application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a composite back electrode according to an embodiment of the present invention.
Fig. 2 is a flowchart of a process for preparing a back electrode with a composite structure according to an embodiment of the present invention.
Wherein: 1-conductive non-metal layer, 2-metal layer.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The expression "comprising" an element is an "open" expression which merely means that there are corresponding parts, which should not be interpreted as excluding additional parts.
In order to achieve the object of the present invention, in some embodiments of a composite structure back electrode for a perovskite solar cell and a method for preparing the same, as shown in fig. 1, the composite structure back electrode includes: a conductive non-metal layer 1 and a metal layer 2 compounded on the conductive non-metal layer 1, wherein the conductive non-metal layer 1 is a carbon layer and/or a TCO layer.
The metal material of the metal layer may be, but not limited to, gold, silver, copper, aluminum, iron, bismuth, molybdenum, tungsten, etc.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest features are the same, except that the metal layer 2 is compounded on the upper surface of the conductive non-metal layer 1.
In order to further optimize the implementation effect of the present invention, in other embodiments, the rest features are the same, except that the metal layer 2 is made of a single metal or a composite of multiple metals.
In order to further optimize the effect of the invention, in other embodiments, the remaining features are the same, except that the conductive non-metallic layer 1 has a thickness of 1nm to 200 μm.
In specific embodiments, the thickness of the non-metallic conductive layer may be 3nm, 20nm, 1 μm, 2 μm, 10 μm, 15 μm, 100 μm, 200 μm.
In order to further optimize the performance of the invention, in other embodiments, the remaining features are the same, except that the metal layer 2 has a thickness of 5nm to 200 μm.
In particular embodiments, the metal layer thickness may be 50nm, 100nm, 200nm, 500nm, 5 μm, 10 μm, 20 μm, 50 μm, 100 μm, 150 μm, 200 μm.
On the other hand, the invention discloses a preparation method of a composite structure back electrode for a perovskite solar cell, which specifically comprises the following steps as shown in fig. 2:
s1) coating the conductive non-metal material on the back of the perovskite solar cell to be provided with the electrode part to form a conductive non-metal layer 1;
s2) evaporating or sputtering metal on the surface of the conductive non-metal layer 1 to form a metal layer 2; or, screen printing metal slurry on the conductive non-metal layer 1 to form a metal layer 2;
s3) forming a composite back electrode in which the conductive non-metal layer 1 and the metal layer 2 are combined.
In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining features are the same, except that when the conductive non-metal material is conductive carbon paste, steps S1) and S2) are specifically:
s1) screen printing the conductive carbon paste on the back of the perovskite solar cell to-be-manufactured electrode part, and drying and curing the printed carbon electrode to form a carbon layer;
s2) depositing or sputtering a metal on the surface of the carbon layer to form a metal layer 2.
In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining features are the same, except that when the conductive non-metal material is TCO, steps S1) and S2) specifically include:
s1) sputtering TCO on the back of the perovskite solar cell to-be-manufactured electrode part to form a TCO layer;
s2) evaporating or sputtering the metal on the surface of the TCO layer to form the metal layer 2.
In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining features are the same, except that when the conductive non-metal material is TCO, steps S1) and S2) specifically include:
s1) sputtering TCO on the back of the perovskite solar cell to-be-manufactured electrode part to form a TCO layer;
s2) screen printing a metal conductive paste on the conductive non-metal layer 1 to form a metal layer 2.
At present, the back electrode of the flexible perovskite battery is manufactured by evaporating or sputtering conductive materials such as metal, TCO and the like and screen printing conductive carbon paste, but common metal and perovskite can generate chemical reaction to finally cause the failure of a battery device, and the carbon electrode and TCO materials can cause the low conversion efficiency of the battery device due to the high resistance of the carbon electrode and TCO materials. Current back electrode cost and performance constraints are therefore an important reason to hinder perovskite battery industrialization.
The invention discloses a composite structure back electrode for a perovskite solar cell and a preparation method thereof, wherein the back electrode with a composite structure is formed by a metal layer and a carbon layer and/or a TCO layer, the carbon and the TCO do not generate chemical reaction with perovskite materials, and the metal layer 2 can be metal with good conductivity and low cost, so that the production cost of the perovskite solar cell is reduced.
The composite structure back electrode formed by the invention has the advantages of simple structure, simple process, excellent conductivity, stable state and low cost, and is suitable for large-scale popularization and application.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (9)
1. A composite structure back electrode for a perovskite solar cell, comprising: the conductive nonmetal layer is a carbon layer and/or a TCO layer.
2. The composite structure back electrode for perovskite solar cell as claimed in claim 1, wherein said metal layer is composited on the upper surface of said conductive non-metal layer.
3. The composite structure back electrode for perovskite solar cell as claimed in claim 1, wherein the metal layer is made of a single metal or a composite of a plurality of metals.
4. The composite structured back electrode for perovskite solar cell as claimed in claim 1, wherein the electrically conductive non-metallic layer is 1nm-200 μm thick.
5. The composite structure back electrode for perovskite solar cells as claimed in claim 1, wherein the metal layer has a thickness of 5nm to 200 μm.
6. The preparation method of the composite structure back electrode for the perovskite solar cell is characterized by comprising the following steps:
s1) coating the conductive non-metal material on the back of the perovskite solar cell to be provided with the electrode part to form a conductive non-metal layer;
s2) evaporating or sputtering metal on the surface of the conductive non-metal layer to form a metal layer; or, screen printing metal slurry on the conductive non-metal layer to form a metal layer;
s3) forming a composite back electrode in which the conductive non-metal layer and the metal layer are combined.
7. The method for preparing a composite structure back electrode for a perovskite solar cell as claimed in claim 6, wherein when the conductive non-metallic material is conductive carbon paste, the steps S1) and S2) are specifically as follows:
s1) screen printing the conductive carbon paste on the back of the perovskite solar cell to-be-manufactured electrode part, and drying and curing the printed carbon electrode to form a carbon layer;
s2) depositing or sputtering a metal on the surface of the carbon layer to form a metal layer.
8. The method for preparing a composite structure back electrode for a perovskite solar cell as claimed in claim 6, wherein when the conductive non-metallic material is TCO, the steps S1) and S2) are specifically as follows:
s1) sputtering TCO on the back of the perovskite solar cell to-be-manufactured electrode part to form a TCO layer;
s2) evaporating or sputtering the metal on the surface of the TCO layer to form a metal layer.
9. The method for preparing a composite structure back electrode for a perovskite solar cell as claimed in claim 6, wherein when the conductive non-metallic material is TCO, the steps S1) and S2) are specifically as follows:
s1) sputtering TCO on the back of the perovskite solar cell to-be-manufactured electrode part to form a TCO layer;
s2) screen printing a metal conductive paste on the conductive non-metal layer to form a metal layer.
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