Conductive adhesive tape and perovskite solar cell

Abstract

The utility model relates to the field of photovoltaic technology, and specifically provides a conductive adhesive tape and a perovskite solar cell. The conductive adhesive tape comprises a base material layer, a grid conductive layer and a conductive adhesive filling layer, the grid conductive layer and the conductive adhesive filling layer are located on the surface of one side of the base material layer, the grid conductive layer is of a grid-shaped structure and arranged on the surface of the base material layer, and meshes of the grid-shaped structure are filled with the conductive adhesive filling layer. The conductive adhesive tape disclosed by the utility model can be widely applied to the field of building integrated photovoltaics; secondly, the conductive adhesive tape is applied to the perovskite solar cell, and the surface of one side of the substrate layer is provided with a first area, a second area and a third area; and the conductive adhesive tape is arranged on the surface of one side, far away from the substrate layer, of the transparent conductive layer in the first region and the second region, and the conductive adhesive layer and the cell layer are arranged at an interval, so that the electrical property and reliability of the perovskite solar cell are high.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a conductive tape and a perovskite solar cell. Background Art

[0002] Perovskite solar cells generally include a substrate layer, a transparent conductive layer, a hole transport layer, a perovskite absorption layer, an electron transport layer, and a metal electrode layer, which are stacked in sequence. The method of converting a large-area perovskite solar cell into multiple small-area sub-cells is realized by laser scribing conventional P1 (cutting the transparent conductive layer), P2 (cutting the perovskite absorption layer), and P3 (cutting the metal electrode layer) to reduce the current of the entire component and increase the voltage. Existing perovskite solar cells use a combination of conductive tape + tinned copper tape to achieve current extraction. Because the tensile strength of the conductive tape is limited and it is not easy to weld with the junction box, the conductive tape is attached to the two sub-cells at the edge of the perovskite solar cell, and the tinned copper tape is used to jointly achieve current extraction. Before the conductive tape is attached to the two sub-cells at the edge of the perovskite solar cell, it is also necessary to apply an acrylic material with a conductive function, taking into account the dual functions of bonding and conduction, so that the conductive tape can be easily attached and fixed.

[0003] However, the current conductive tape is opaque in appearance, which will limit the application of perovskite solar cells in the field of photovoltaic building integration; secondly, the material of the perovskite absorption layer is a less stable material. The additives and water vapor in the conductive tape are easily released and diffused into the perovskite absorption layer during high-temperature and high-pressure lamination packaging, reacting with the perovskite absorption layer to cause decomposition or phase change of the perovskite absorption layer, seriously affecting the electrical performance and long-term reliability of the perovskite solar cell module.

[0004] Therefore, there is an urgent need to provide a conductive tape and apply it to perovskite solar cells to solve the above problems. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of poor electrical performance and reliability of perovskite solar cells caused by the application of conductive tape in the prior art in the field of photovoltaic building integration and in perovskite solar cells, thereby providing a conductive tape and a perovskite solar cell.

[0006] The utility model provides a conductive adhesive tape, comprising: a substrate layer, a grid conductive layer and a conductive adhesive filling layer located on one side surface of the substrate layer, wherein the grid conductive layer is arranged on the surface of the substrate layer in a grid structure, and the conductive adhesive filling layer fills the meshes of the grid structure.

[0007] Optionally, the mesh conductive layer includes a plurality of meshes, and the cross-sectional size of a single mesh is 0.0004 mm. 2 -1mm 2 The cross-sectional size of the mesh wire used to form a single mesh in the mesh conductive layer is 0.0004 mm 2 -0.04mm 2 .

[0008] Optionally, the thickness of the substrate layer is 10 μm-100 μm; the thickness of the conductive adhesive filling layer is 50 μm-200 μm.

[0009] Optionally, the substrate layer includes a polyethylene terephthalate layer or a polyethylene naphthalate layer; the grid conductive layer includes a silver conductive layer; the conductive adhesive filling layer includes a blend mixed layer of acrylate and silver, a blend mixed layer of transparent silica gel and silver, or a blend mixed layer of transparent epoxy adhesive and silver.

[0010] The utility model also provides a perovskite solar cell, comprising: the above-mentioned conductive tape.

[0011] Optionally, it also includes: a substrate layer; one side surface of the substrate layer has a first area, a second area and a third area; the third area is located between the first area and the second area; a transparent conductive layer; the transparent conductive layer is at least located in the third area and extends to the first area and the second area; a battery layer; the battery layer is located in the third area on a side surface of the transparent conductive layer away from the substrate layer; the conductive tape is at least arranged on a side of the transparent conductive layer in the first area and the second area away from the substrate layer, and the conductive tape is spaced apart from the battery layer.

[0012] Optionally, the width of the conductive tape is less than or equal to the width of the transparent conductive layer in any one of the first region and the second region; the width of the conductive tape is 3 mm-18 mm.

[0013] Optionally, it also includes: a positive lead-in terminal and a negative lead-in terminal, the positive lead-in terminal and the negative lead-in terminal are arranged opposite to each other; the positive lead-in terminal extends from the extension portion of the conductive tape in the first area toward one end of the second area, and the negative lead-in terminal extends from the extension portion of the conductive tape in the second area toward one end of the first area; the conductive tape includes a covering portion and an extension portion, the covering portion covers the transparent conductive layer; the extension portion extends from one end of the covering portion to a surface of a portion of the substrate layer along an extension direction of the covering portion; the extension portion of the conductive tape in the first area is used to bond and fix the positive lead-in terminal to the substrate layer; the extension portion of the conductive tape in the second area is used to bond and fix the negative lead-in terminal to the substrate layer. It should be noted that those skilled in the art can understand that the conductive tapes in the first area and the second area and between the positive lead-in terminal and the negative lead-in terminal must be in an open circuit state, that is, the transparent conductive layer, the conductive tape, and the lead-in terminal cannot cause a short circuit in the battery. For example, the area between the positive lead-in terminal and the negative lead-in terminal is not covered with the transparent conductive layer, and the transparent conductive layer in the corresponding area is generally scribed by laser to directly expose the non-conductive substrate layer, and the extension portion and the positive lead-in terminal and the negative lead-in terminal can be located on one side surface of the substrate layer.

[0014] Optionally, the first area and the second area are both "L"-shaped; the extension portion and the covering portion form an angle of 90°, the extension portion of the conductive tape in the first area and the extension portion of the conductive tape in the second area extend toward each other; and there is an opening between the extension portion of the conductive tape in the first area and the extension portion of the conductive tape in the second area.

[0015] Optionally, it also includes: an electrode layer, which is arranged on the surface of the transparent conductive layer away from the substrate layer; the conductive tape is arranged on the surface of the electrode layer in the first area and the second area away from the substrate layer; the grid conductive layer and the conductive adhesive filling layer in the conductive tape are attached to the surface of the electrode layer.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a conductive tape, which is provided with a micron-scale grid conductive layer on one side surface of a substrate layer so that the naked eye cannot identify the existence of grid lines; secondly, a conductive adhesive filling layer is provided in the meshes of the grid structure, and the conductive adhesive filling layer adopts a transparent material. Due to the characteristics of the conductive adhesive filling layer itself, the conductive adhesive filling layer is transparent. Therefore, the conductive tape as a whole adopts a transparent polymer film (substrate) + micron-scale grid lines (grid conductive layer) + transparent conductive adhesive (conductive adhesive filling layer), which solves the appearance problem of conventional conductive tapes caused by opacity, thereby being beneficial to the application of perovskite solar cells in the field of photovoltaic building integration.

[0018] Furthermore, the above-mentioned conductive tape is applied to a perovskite solar cell. The perovskite solar cell, the above-mentioned conductive tape; also includes: a substrate layer; one side surface of the substrate layer has a first area, a second area and a third area; the third area is located between the first area and the second area; a transparent conductive layer; the transparent conductive layer is at least located in the third area and extends to the first area and the second area; a battery layer; the battery layer is located in the third area on a side surface of the transparent conductive layer away from the substrate layer; the conductive tape is arranged on a side of the transparent conductive layer in the first area and the second area away from the substrate layer, and the conductive tape is spaced apart from the battery layer. Since the battery layer is located on the side of the transparent conductive layer in the third region away from the substrate layer, the conductive tape is arranged on the side of the transparent conductive layer in the first region and the second region away from the substrate layer, thereby avoiding the conductive tape from causing decomposition or phase change of part of the battery layer when participating in lamination packaging; secondly, the conductive tape is arranged at a distance from the battery layer, and when the perovskite solar cell works outdoors for a long time, the long-term risk of the conductive tape volatilizing and laterally diffusing to the battery layer, causing decomposition or phase change of part of the battery layer, is eliminated, thereby improving the electrical performance and reliability of the perovskite solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the conductive tape in the embodiment of the utility model;

[0021] Figure 2 It is a schematic structural diagram of a perovskite solar cell in an embodiment of the utility model;

[0022] Figure 3 is a cross-sectional view of a perovskite solar cell in an embodiment of the present utility model;

[0023] Figure 4 and Figure 5 All of them are schematic diagrams of the transparent conductive layer on one side surface of the substrate layer in the embodiments of the present utility model.

[0024] Reference numerals:

[0025] 1-substrate layer; 2-transparent conductive layer; 3-battery layer;

[0026] 4-conductive tape; 41-base material layer; 42-grid conductive layer; 43-conductive adhesive filling layer;

[0027] 5-lead-out terminal; 51-positive electrode lead-out terminal; 52-negative electrode lead-out terminal;

[0028] 6-electrode layer;

[0029] A-first area; B-second area; C-third area;

[0030] P1 is the position of the first laser scribing, P2 is the position of the second laser scribing, and P3 is the position of the third laser scribing. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] refer to Figure 1, this embodiment provides a conductive tape 4, the conductive tape 4 includes a substrate layer 41 and a grid conductive layer 42 and a conductive adhesive filling layer 43 located on one side surface of the substrate layer 41, the grid conductive layer 42 is a micrometer-level grid line structure, the grid conductive layer 42 is arranged on the surface of the substrate layer 41 in a grid-like structure, and the conductive adhesive filling layer 43 fills the meshes of the grid-like structure. Specifically, the conductive adhesive filling layer 43 of the conductive tape 4 is arranged toward the transparent conductive layer. Compared with the conductive tape using tinned copper tape in the prior art, the structure of the conductive tape 4 is more stable. Since the grid conductive layer 42 is filled with conductive adhesive, the adhesion between the grid conductive layer 42 and the substrate layer 41 is better, and is stronger than the adhesion between the tinned copper tape and the substrate layer 41. At the same time, the new structure is also conducive to enhancing the adhesion between the grid conductive layer 42 and the photovoltaic module.

[0036] A micrometer-scale grid conductive layer 42 is provided on one side surface of the substrate layer 41, so that the naked eye cannot identify the existence of the grid lines; secondly, a conductive adhesive filling layer 43 is provided in the meshes of the grid structure, and the conductive adhesive filling layer 43 is made of transparent material. Due to the characteristics of the conductive adhesive filling layer 43 itself, the conductive adhesive filling layer 43 is transparent. Therefore, the conductive tape 4 as a whole adopts a transparent polymer film (substrate) + micrometer-scale grid lines (grid conductive layer) + transparent conductive adhesive (conductive adhesive filling layer), which solves the appearance problem caused by the opacity of conventional conductive tapes, thereby facilitating the application of perovskite solar cells in the field of photovoltaic building integration.

[0037] It should be noted that the steps of forming the conductive tape 4 in the present application include: forming a mesh conductive layer 42 on one side surface of the substrate layer 41 by printing, wherein the mesh conductive layer has a plurality of mesh holes; and filling the mesh holes by printing to form a conductive adhesive filling layer 43. The mesh conductive layer 42 includes a plurality of mesh holes, and the cross-sectional size of a single mesh hole is 0.0004 mm. 2 -1mm 2 , for example 0.0004mm 2 、0.001mm 2 , 0.02mm 2 、0.078mm 2 μm、0.9mm 2 or 1mm 2 It can be understood that a single mesh is equivalent to a conductive glue filling layer 43 after being filled, and the cross-sectional size of the conductive glue filling layer 43 is 0.0004mm 2 -1mm 2 The cross-sectional size of the mesh wire used to form a single mesh in the mesh conductive layer is 0.0004 mm 2 -0.04mm 2 , for example 0.0004mm 2、0.005mm 2 、0.008mm 2 , 0.01mm 2 、0.035mm 2 or 0.04mm 2 The mesh wires used to form a single mesh in the mesh conductive layer 42 are only micrometer-level metal mesh wires, and the existence of the mesh wires cannot be identified by naked eyes, and the mesh conductive layer 42 has a transparent appearance.

[0038] In one embodiment, the thickness of the conductive adhesive filling layer 43 is 50 μm-200 μm, for example, 50 μm, 100 μm, 150 μm or 200 μm.

[0039] In one embodiment, the thickness of the substrate layer 41 is 10 μm-100 μm, for example, 10 μm, 20 μm, 50 μm, 80 μm or 100 μm. If the thickness of the substrate layer is too large, it is easy to cause material waste; if the thickness of the substrate layer is too small, it cannot play a bearing role for the grid conductive layer 42 and the conductive glue filling layer 43.

[0040] In one embodiment, the substrate layer 41 includes a polyethylene terephthalate layer or a polyethylene naphthalate layer; the grid conductive layer 42 includes a silver conductive layer; the material of the conductive adhesive filling layer 43 includes a blend of acrylate and silver, a blend of transparent silica gel and silver, or a blend of transparent epoxy glue and silver. Metal powder (such as silver powder) with good conductivity and chemically inactive properties is added to the conductive adhesive filling layer 43 to exhibit conductive properties. Due to the characteristics of the material of the conductive adhesive filling layer 43 itself, the conductive adhesive filling layer 43 is transparent, and the material selected for the substrate layer 41 is also a transparent material, so the conductive tape 4 has a transparent appearance as a whole. The use of the above-mentioned conductive tape 4 solves the appearance problem caused by the opacity of conventional conductive tapes, which is conducive to the application of perovskite solar cells in the field of photovoltaic building integration.

[0041] Combined with reference Figure 2 and Figure 3, this embodiment provides a perovskite solar cell, the above-mentioned conductive tape 4. Also includes: a substrate layer 1; one side surface of the substrate layer 1 has a first area A, a second area B and a third area C; the third area C is located between the first area A and the second area B; a transparent conductive layer 2; the transparent conductive layer 2 is at least located in the third area C and extends to the first area A and the second area B; a battery layer 3; the battery layer 3 is located on the side surface of the transparent conductive layer 2 in the third area C away from the substrate layer 1; a conductive tape 4; the conductive tape 4 is at least arranged on the side of the transparent conductive layer 2 in the first area A and the second area B away from the substrate layer 1, and the conductive tape 4 is spaced apart from the battery layer 3.

[0042] In this embodiment, since the battery layer 3 is located on the side surface of the transparent conductive layer 2 in the third area C away from the substrate layer 1, the conductive tape 4 is arranged on the side of the transparent conductive layer 2 in the first area A and the second area B away from the substrate layer 1. In this way, since the conductive tape is not on the battery layer, the conductive tape 4 is prevented from causing decomposition or phase change of part of the battery layer when participating in the lamination packaging; secondly, the conductive tape 4 is spaced apart from the battery layer 3. When the perovskite solar cell works outdoors for a long time, the long-term risk of the conductive tape volatilizing and laterally diffusing to the battery layer, causing decomposition or phase change of part of the battery layer, is eliminated, thereby improving the electrical performance and reliability of the perovskite solar cell.

[0043] It should be noted that the present disclosure does not limit the specific structure of the battery layer 3, and it can be set up using existing technology according to actual needs. For example, it can generally include a hole transport layer (not shown in the figure) located on the surface of the transparent conductive layer 2 away from the substrate layer, a perovskite absorption layer (not shown in the figure) located on the surface of the hole transport layer away from the substrate layer, and an electron transport layer (not shown in the figure) located on the surface of the perovskite absorption layer away from the substrate layer.

[0044] Continue to refer Figure 2 , the perovskite solar cell also includes: an electrode layer 6, which is arranged on the surface of the transparent conductive layer 2 away from the substrate layer 1; the conductive tape 4 is arranged on the surface of the electrode layer 6 in the first area A and the second area B away from the substrate layer 1; the grid conductive layer 42 and the conductive adhesive filling layer 43 are attached to the surface of the electrode layer 6. Compared with the solution of directly applying the conductive tape to the transparent conductive layer, adding an electrode layer between the two can reduce the series resistance of the component and facilitate the transfer of charges. Moreover, at the process level, the electrode layer covering the first area A and the second area B can be prepared at the same time as the electrode layer covering the battery layer 3, and no additional process will be added.

[0045] It is known that the steps of forming a perovskite solar cell generally include: forming a transparent conductive layer 2 on one side surface of a substrate layer 1; performing a first laser scribing on the transparent conductive layer 2 (refer to Figure 4 ); forming a battery layer 3 on the side of the transparent conductive layer 2 away from the substrate layer 1; performing a second laser scribing on the battery layer 3; forming an electrode layer 6 on the side of the battery layer 3 away from the substrate layer 1; performing a third laser scribing on the electrode layer 6. After the third laser scribing, a number of solar cells are formed. Figure 2 Where P1 represents the position of the first laser scribing, P2 represents the position of the second laser scribing, and P3 represents the position of the third laser scribing.

[0046] In one embodiment, during the second laser scribing of the cell layer 3, at least the cell layers in the first and last two solar cells are removed, that is, the cell layers on the surface of the transparent conductive layer 2 located in the first area A and the second area B away from the substrate layer 1 are removed, and then the electrode layer is deposited so that the subsequently formed conductive tape 4 is in contact with the electrode layer 6, so as to improve the reliability of the perovskite solar cell.

[0047] In another embodiment, after the electrode layer 6 is laser-scribed for the third time, the battery layer 3 on the surface of the transparent conductive layer 2 located in the first area A and the second area B away from the substrate layer is removed (not shown in the figure).

[0048] The step of forming the perovskite solar cell also includes: performing edge cleaning on the perovskite solar cell (refer to Figure 5 ).

[0049] Continue to refer Figure 1 The perovskite solar cell also includes: a lead-out terminal 5; the lead-out terminal 5 is extended and arranged in parallel to the series connection direction of the solar cell sheets in the battery layer; the conductive tape 4 includes a covering portion and an extending portion, the covering portion covers the transparent conductive layer 2; the extending portion extends from one end of the covering portion to a surface of a portion of the substrate layer along the extending direction of the covering portion; the extending portion of the conductive tape 4 adheres and fixes the lead-out terminal 5 to the substrate layer 1.

[0050] It should be noted that the series connection direction of the solar cells in the battery layer 3 is perpendicular to the length direction of the solar cells.

[0051] In one embodiment, the width of the conductive tape 4 is less than or equal to the width of the transparent conductive layer 2 in any one of the first region and the second region. That is, the width of the covering portion and the width of the extending portion of the conductive tape 4 are both less than or equal to the width of the transparent conductive layer 2 in the first region, and are less than or equal to the width of the transparent conductive layer 2 in the second region. Figure 5 W represents the width of the extended portion of the conductive tape 4; the width direction of the extended portion of the conductive tape 4 is perpendicular to the series connection direction of the solar cells; the length of the extended portion is extended parallel to the series connection direction of the solar cells.

[0052] It is understandable that the conductive tape 4 of a suitable size is selected for laying according to the width of the transparent conductive layer 2 in the first area A and the second area B carved out in actual production. In one embodiment, the width of the conductive tape 4 can be 3 mm-18 mm, for example, 3 mm, 5 mm, 10 mm, 14 mm, 17 mm or 18 mm.

[0053] Specifically, in one embodiment, the first region A and the second region B are both in a straight line shape (not shown in the figure); the extension portion and the covering portion form a straight line structure. The lead-out terminal 5 includes a positive lead-out terminal 51 and a negative lead-out terminal 52, and the positive lead-out terminal 51 and the negative lead-out terminal 52 are arranged opposite to each other, respectively extending from the solar cells at both ends of the series connection direction of the solar cells to the solar cells in the middle.

[0054] It should be noted that those skilled in the art can understand that the conductive tapes in the first area and the second area and between the positive lead-in terminal and the negative lead-in terminal must be in an open circuit state, that is, the transparent conductive layer, the conductive tape, and the lead-in terminal cannot cause a short circuit in the battery. For example, the area between the positive lead-in terminal and the negative lead-in terminal is not covered with the transparent conductive layer, and the transparent conductive layer in the corresponding area is generally scribed by laser to directly expose the non-conductive substrate layer, and the extension portion and the positive lead-in terminal and the negative lead-in terminal can be located on one side surface of the substrate layer.

[0055] In another embodiment, reference Figure 2, the first region A and the second region B are both in an "L" shape; the extension portion and the covering portion form an angle of 90°, the extension portion of the conductive tape 4 in the first region A and the extension portion of the conductive tape 4 in the second region B extend toward each other; there is an opening between the extension portion of the conductive tape 4 in the first region A and the extension portion of the conductive tape 4 in the second region B. The lead-out terminal 5 includes a positive lead-out terminal 51 and a negative lead-out terminal 52, the positive lead-out terminal 51 and the negative lead-out terminal 52 are arranged opposite to each other, the positive lead-out terminal 51 extends from the extension portion of the conductive tape 4 in the first region A toward one end of the second region B, and the negative lead-out terminal 52 extends from the extension portion of the conductive tape 4 in the second region B toward one end of the first region A. By adopting the above-mentioned setting method, the extended portion of the conductive tape 4 in the first area A and the extended portion of the conductive tape 4 in the second area B are extended toward each other, which can shorten the distance between the lead ends formed subsequently, facilitate the connection of the conductive tape and the lead ends to the external circuit after they are gathered together, and also facilitate packaging.

[0056] In one embodiment, the transparent conductive layer 2 extends to the first region A and the second region B, and also extends along the first region A or the second region B to the side of the third region C, and is spaced between the portion located in the first region A and the portion located in the second region B, and is spaced from the portion located in the third region C; the extended portion of the conductive tape 4 also covers the portion of the transparent conductive layer 2 located in the first region A on the side of the third region C and the portion of the transparent conductive layer 2 located in the second region B on the side of the third region C; the conductive tape 4 adheres and fixes the lead terminal to the surface of the transparent conductive layer 2. Specifically, the extended portion of the conductive tape 4 in the first region A adheres and fixes the positive lead terminal 51 to the substrate layer 1; the extended portion of the conductive tape 4 in the second region B adheres and fixes the negative lead terminal 52 to the substrate layer 1.

[0057] It should be noted that the conductive tape 4 plays the same role as a general bus bar in the perovskite solar cell, and the conductive tape 4 of the present application also has a bonding function, which can bond and fix the lead end to the substrate layer 1; in addition, the lead end 5 can be made of the same material as a general bus bar.

[0058] In one embodiment, the material of the substrate layer 1 includes glass, coated glass, polyethylene terephthalate or polyethylene naphthalate; the material of the transparent conductive layer 2 includes indium tin oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide or boron-doped zinc oxide.

[0059] In one embodiment, the thickness of the transparent conductive layer 2 is 400nm-1000nm, for example, 400nm, 600nm, 800nm ​​or 1000nm; the thickness of the electrode layer 6 is 30nm-200nm, for example, 30nm, 100nm, 150nm or 200nm. The thickness parameters of the transparent conductive layer 2 and the electrode layer 6 can be set according to the requirements of the actual production process without limitation.

[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A conductive tape, characterized in that: include: A substrate layer, and a grid conductive layer and a conductive adhesive filling layer located on one side surface of the substrate layer, wherein the grid conductive layer is arranged on the surface of the substrate layer in a grid-like structure, and the conductive adhesive filling layer fills the meshes of the grid-like structure; The substrate layer is a transparent polymer film; the grid conductive layer is a micron-scale grid line structure; the grid conductive layer includes a plurality of mesh holes, and the cross-sectional size of a single mesh hole is 0.0004 mm 2 -1mm 2 ; The material of the conductive glue filling layer is transparent conductive glue.

2. The conductive tape according to claim 1, characterized in that: The cross-sectional size of the mesh wire used to form a single mesh in the mesh conductive layer is 0.0004 mm 2 -0.04mm 2 .

3. The conductive tape according to claim 1, characterized in that: The thickness of the substrate layer is 10 μm-100 μm; the thickness of the conductive adhesive filling layer is 50 μm-200 μm.

4. The conductive tape according to claim 1, characterized in that: The substrate layer is a polyethylene terephthalate layer or a polyethylene naphthalate layer; and the grid conductive layer is a silver conductive layer.

5. A perovskite solar cell, characterized in that: include: The conductive tape according to any one of claims 1 to 4.

6. The perovskite solar cell according to claim 5, characterized in that: Also includes: A substrate layer; one side surface of the substrate layer has a first area, a second area and a third area; The third area is located between the first area and the second area; A transparent conductive layer; The transparent conductive layer is at least located in the third region and extends to the first region and the second region; Battery layer; The battery layer is located on a side of the transparent conductive layer in the third region away from the substrate layer; The conductive tape is at least arranged on a side of the transparent conductive layer in the first region and the second region away from the substrate layer, and the conductive tape is spaced apart from the battery layer.

7. The perovskite solar cell according to claim 6, characterized in that: The width of the conductive tape is less than or equal to the width of the transparent conductive layer in any one of the first region and the second region; The width of the conductive tape is 3 mm to 18 mm.

8. The perovskite solar cell according to claim 6, characterized in that: Also includes: A positive lead-out terminal and a negative lead-out terminal, the positive lead-out terminal and the negative lead-out terminal are arranged opposite to each other; the positive lead-out terminal extends from the extension portion of the conductive tape in the first region toward one end of the second region, and the negative lead-out terminal extends from the extension portion of the conductive tape in the second region toward one end of the first region; The conductive tape includes a covering portion and an extending portion, the covering portion covers the transparent conductive layer; the extending portion extends from one end of the covering portion to a portion of the surface of the substrate layer along an extending direction of the covering portion; the extending portion of the conductive tape in the first area is used to bond and fix the positive electrode lead terminal to the substrate layer; the extending portion of the conductive tape in the second area is used to bond and fix the negative electrode lead terminal to the substrate layer.

9. The perovskite solar cell according to claim 8, characterized in that: The first area and the second area are both "L"-shaped; the extension portion and the covering portion form an angle of 90°, the extension portion of the conductive tape in the first area and the extension portion of the conductive tape in the second area extend toward each other; there is an opening between the extension portion of the conductive tape in the first area and the extension portion of the conductive tape in the second area.

10. The perovskite solar cell according to claim 8, characterized in that: Also includes: An electrode layer is disposed on a surface of the transparent conductive layer away from the substrate layer; The conductive tape is arranged on a surface of a side of the electrode layer located in the first area and the second area away from the substrate layer; the grid conductive layer and the conductive adhesive filling layer in the conductive tape are attached to the surface of the electrode layer.

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