Packaging structure of flexible perovskite photovoltaic module

Abstract

The utility model belongs to the technical field of perovskite cells, and specifically relates to a packaging structure of a flexible perovskite photovoltaic assembly. According to the utility model, the first inorganic barrier layer, the second inorganic barrier layer, the organic buffer layer and the water-oxygen barrier film are adopted to package the perovskite photovoltaic module, so that the light absorption performance of the perovskite photovoltaic module is not affected, and the light absorption performance of the perovskite photovoltaic module can be improved through physical adsorption or chemical reaction. Through the synergistic effect with the first inorganic barrier layer, the second inorganic barrier layer and the organic buffer layer, the perovskite photovoltaic module can be effectively prevented from being damaged by water and oxygen, so that the service life of the perovskite photovoltaic module is prolonged; according to the perovskite photovoltaic module provided by the invention, the water-oxygen barrier film is arranged, so that the number of layers of the stacked structure of the packaging layer and the thickness of the packaging layer are reduced, the overall thickness of the perovskite photovoltaic module is further reduced, the flexibility of the perovskite photovoltaic module is improved, and meanwhile, the effect of releasing stress in the inorganic barrier layer in the stacked structure can also be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of perovskite batteries, and in particular relates to a packaging structure of a flexible perovskite photovoltaic component. Background Art

[0002] After more than a decade of development, the photoelectric conversion efficiency of perovskite solar cells has increased from the initially reported 3.8% to the current 26.1%, reflecting the huge development potential of perovskite solar cells. Moreover, as the third generation of solar cells, perovskite solar cells have the characteristics of excellent light absorption coefficient, high open circuit voltage, high charge carrier migration, large diffusion length and long carrier lifetime. In addition, perovskite solar cells also have the advantages of simple manufacturing process and low raw material cost.

[0003] Because perovskite solar cell materials are exposed to the air, they will react with moisture in the air and cause degradation of the light-absorbing layer, resulting in a rapid decline in the performance of the solar cell. Therefore, in order to isolate the influence of water and oxygen in the outside air on the perovskite solar cells, packaging methods are used to package the perovskite solar cell body.

[0004] However, existing encapsulation glues (such as EVA, POE, etc.) and their combinations cannot meet the stability test of related solar cells. The main reason is that the water and oxygen permeability of existing encapsulation glues is too high and cannot meet the water and oxygen barrier requirements of perovskite materials. Therefore, it is urgent to develop a flexible perovskite photovoltaic module packaging structure to meet the long life use requirements of titanium ore photovoltaic modules.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a packaging structure of a flexible perovskite photovoltaic module.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A packaging structure of a flexible perovskite photovoltaic module, comprising a substrate, a perovskite battery layer and a packaging body for coating the perovskite battery layer, which are stacked in sequence;

[0009] The package includes a barrier layer and a water-oxygen barrier film; the water-oxygen barrier film is arranged in the barrier layer; or, the water-oxygen barrier film is arranged between the barrier layer and the perovskite battery layer, and the water-oxygen barrier film is coated on the top edge and circumference of the perovskite battery layer.

[0010] Specifically, the barrier layer includes a first inorganic barrier layer, an organic buffer layer, and a second inorganic barrier layer which are stacked in sequence.

[0011] Specifically, the vertical projection area of ​​the second inorganic barrier layer on the substrate is larger than the vertical projection area of ​​the organic buffer layer and the first inorganic barrier layer on the substrate, and the vertical projection area of ​​the organic buffer layer on the substrate is smaller than the vertical projection area of ​​the first inorganic barrier layer on the substrate.

[0012] Specifically, the water and oxygen barrier film is disposed between the organic buffer layer and the second inorganic barrier layer;

[0013] The projection area of ​​the second inorganic barrier layer in the vertical direction on the substrate is larger than the projection areas of the water and oxygen barrier film, the organic buffer layer and the first inorganic barrier layer in the vertical direction on the substrate; the projection area of ​​the first inorganic barrier layer in the vertical direction on the substrate is larger than the projection areas of the water and oxygen barrier film and the organic buffer layer in the vertical direction on the substrate; the projection area of ​​the water and oxygen barrier film in the vertical direction on the substrate is larger than the projection area of ​​the organic buffer layer in the vertical direction on the substrate.

[0014] Specifically, the water and oxygen barrier film is disposed between the first inorganic barrier layer and the perovskite cell layer;

[0015] The projection area of ​​the second inorganic barrier layer in the vertical direction on the substrate is larger than the projection areas of the water and oxygen barrier film, the organic buffer layer and the first inorganic barrier layer in the vertical direction on the substrate; the projection area of ​​the first inorganic barrier layer in the vertical direction on the substrate is larger than the projection areas of the organic buffer layer and the water and oxygen barrier film in the vertical direction on the substrate; the projection area of ​​the organic buffer layer in the vertical direction on the substrate is larger than the projection area of ​​the water and oxygen barrier film in the vertical direction on the substrate.

[0016] Specifically, the thickness of the first inorganic barrier layer is 5nm to 10μm. It should be noted that the thickness of the first inorganic barrier layer can be adaptively prepared according to actual needs, and the optional thickness is 5nm, 20nm, 50nm, 100nm, 300nm, 800nm, 1000nm, 3μm, 5μm, 8μm, 10μm, etc., which are not listed one by one.

[0017] Specifically, the thickness of the second inorganic barrier layer is 5nm to 10μm. It should be noted that the thickness of the second inorganic barrier layer can be adaptively prepared according to actual needs, and the optional thickness is 5nm, 20nm, 50nm, 100nm, 300nm, 800nm, 1000nm, 3μm, 5μm, 8μm, 10μm, etc., which are not listed one by one.

[0018] Specifically, the material of the organic buffer layer is a high molecular polymer or a resin material.

[0019] Specifically, the thickness of the organic buffer layer is 10nm to 100μm; it should be noted that the thickness of the organic buffer layer can be adaptively prepared according to actual packaging requirements, and the optional thickness is 10nm, 20nm, 50nm, 100nm, 300nm, 800nm, 1000nm, 3μm, 10μm, 50μm, 80μm, 100μm, etc., which are not listed one by one.

[0020] Specifically, the perovskite cell layer is divided into a plurality of sub-cell structures by a plurality of grooves, and the sub-cell structure includes a light-emitting effective area and a laser-scribed area; the perovskite cell layer includes a conductive layer, a first carrier layer, a perovskite layer, a second carrier layer, and a back electrode layer which are stacked in sequence.

[0021] Specifically, each of the groove portions includes a first groove, a second groove and a third groove arranged in parallel; the first groove passes through the conductive layer, and the first groove is filled with a first material that is the same as the first carrier layer material; the second groove passes through the first carrier layer, the perovskite layer, and the second carrier layer in sequence, and the second groove is filled with a second material that is the same as the back electrode layer material; the third groove passes through the first carrier layer, the perovskite layer, the second carrier layer, and the back electrode layer in sequence, and the third groove is filled with a third material that is the same as the barrier layer material; the third groove is filled with a third material that is the same as the first inorganic barrier layer material.

[0022] Specifically, the laser scribing area includes a first groove, a second groove and a third groove. Laser scribing is to use laser to perform scribing on the device to form grooves after scribing.

[0023] Specifically, the thickness of the water and oxygen barrier film is 5nm to 1μm; it should be noted that the thickness of the water and oxygen barrier film can be adaptively prepared according to actual needs, and the optional thickness is 5nm, 20nm, 50nm, 70nm, 100nm, 300nm, 500nm, 700nm, 900nm, 1μm, etc., which are not listed one by one.

[0024] Specifically, the material of the water and oxygen barrier film is an alkali metal, an alkaline earth metal, or an alloy thereof; the material of the water and oxygen barrier film is an alloy of one or more of Li, Na, K, Rb, Cs, Mg, Ca and Ba.

[0025] Specifically, the material of the first inorganic barrier layer and the second inorganic barrier layer is one or more of Al2O3, TiO2, ZnO, ZrO2, MgO, HfO2, Ta2O5, Si3N4, AlN, SiNx, SiNO, SiO, SiO2, SiOx, SiC or ITO.

[0026] Compared with the prior art, the technical solution provided by the utility model includes the following beneficial effects:

[0027] 1) The utility model uses a first inorganic barrier layer, a second inorganic barrier layer, an organic buffer layer and a water-oxygen barrier film to encapsulate the perovskite photovoltaic module. On the basis of not affecting the light absorption performance of the perovskite photovoltaic module, the water-oxygen barrier film can cooperate with the first inorganic barrier layer, the second inorganic barrier layer and the organic buffer layer through physical adsorption or chemical reaction, and can effectively prevent water and oxygen from damaging the perovskite photovoltaic module, thereby improving the service life of the perovskite photovoltaic module;

[0028] 2) A water and oxygen barrier film is provided to reduce the number of layers in the stacked structure of the encapsulation layer and the thickness of the encapsulation layer, thereby reducing the overall thickness of the perovskite photovoltaic module, which is beneficial to improving the flexibility of the perovskite photovoltaic module and can also release the stress in the inorganic barrier layer in the stacked structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0032] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0033] Figure 3 This is a schematic diagram of the structure of Example 3 of the utility model.

[0034] Among them: 10 is a substrate; 11 is a titanite cell layer; 11-1 is a conductive layer; 11-2 is a first carrier layer; 11-3 is a perovskite layer; 11-4 is a second carrier layer; 11-5 is a back electrode layer; 12 is a barrier layer; 12-1 is a first inorganic barrier layer; 12-2 is an organic buffer layer; 12-3 is a second inorganic barrier layer; 13 is a water and oxygen barrier film; 14 is a sub-cell structure; 14-1 is a light-emitting effective area; 14-2 is a laser scribing area; P1 is a first groove; P2 is a second groove; P3 is a third groove. DETAILED DESCRIPTION

[0035] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. Instead, they are only examples consistent with some aspects of the present utility model as detailed in the attached claims.

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] Example 1

[0038] This embodiment provides a packaging structure of a flexible perovskite photovoltaic module, comprising a substrate 10, a perovskite battery layer 11, and a packaging body for coating the perovskite battery layer 11, which are stacked in sequence;

[0039] The package body includes a first inorganic barrier layer 12-1, an organic buffer layer 12-2, and a second inorganic barrier layer 12-3 which are stacked in sequence; the package body also includes a water-oxygen barrier film 13, which is arranged between the organic buffer layer 12-2 and the second inorganic barrier layer 12-3; see Figure 1 shown.

[0040] Specifically, the vertical projection area of ​​the second inorganic barrier layer 12-3 on the substrate 10 is larger than the vertical projection area of ​​the organic buffer layer 12-2 and the first inorganic barrier layer 12-1 on the substrate 10, and the vertical projection area of ​​the organic buffer layer 12-2 on the substrate 10 is smaller than the vertical projection area of ​​the first inorganic barrier layer 12-1 on the substrate 10.

[0041] Specifically, the perovskite cell layer 11 is separated by two grooves to form three sub-cell structures 14, and the sub-cell structure 14 includes a light-emitting effective area 14-1 and a laser-scribed area 14-2; the perovskite cell layer 11 includes a conductive layer 11-1, a first carrier layer 11-2, a perovskite layer 11-3, a second carrier layer 11-4, and a back electrode layer 11-5 which are stacked in sequence.

[0042] Specifically, the groove portion includes a first groove P1, a second groove P2 and a third groove P3 which are arranged in parallel; the first groove P1 passes through the conductive layer 11-1, and the first groove P1 is filled with a first material which is the same as the material of the first carrier layer 11-2; the second groove P2 passes through the first carrier layer 11-2, the perovskite layer 11-3, and the second carrier layer 11-4 in sequence, and the second groove P2 is filled with a second material which is the same as the material of the back electrode layer 11-5; the third groove P3 passes through the first carrier layer 11-2, the perovskite layer 11-3, the second carrier layer 11-4, and the back electrode layer 11-5 in sequence, and the third groove P3 is filled with a third material which is the same as the material of the first inorganic barrier layer 12-1; the third groove P3 is filled with the first inorganic barrier layer 12-1 material, so that the sub-battery structures 14 are also well isolated.

[0043] Specifically, the laser scribing area 14 - 2 includes a first groove P1 , a second groove P2 , and a third groove P3 .

[0044] Specifically, the projection area of ​​the organic buffer layer 12-2 in the vertical direction of the substrate 10 is smaller than the projection area of ​​the first inorganic barrier layer 12-1 in the vertical direction of the substrate 10, the projection area of ​​the water and oxygen barrier film 13 in the vertical direction of the substrate 10 is larger than the projection area of ​​the organic buffer layer 12-2 in the vertical direction of the substrate 10, and the projection area of ​​the second inorganic barrier layer 12-3 in the vertical direction on the substrate 10 is larger than the projection area of ​​the first inorganic barrier layer 12-1 in the vertical direction on the substrate 10; the above configuration enables the first inorganic barrier layer 12-1 to completely encapsulate the perovskite battery layer 11 on the substrate 10, the water-oxygen barrier film 13 and the organic buffer layer 12-2 are completely encapsulated between the first inorganic barrier layer 12-1 and the second inorganic barrier layer 12-3. At the same time, the second inorganic barrier layer 12-3 encapsulates the first inorganic barrier layer 12-1 on the substrate 10; the water-oxygen barrier film 13 can cooperate with the first inorganic barrier layer 12-1, the second inorganic barrier layer 12-3, and the organic buffer layer 12-2 through physical adsorption or chemical reaction, and can effectively avoid the damage of water and oxygen to the perovskite photovoltaic module, thereby improving the service life of the perovskite photovoltaic module.

[0045] Specifically, the material of the water and oxygen barrier film 13 is Li.

[0046] Specifically, the material of the first inorganic barrier layer 12 - 1 is Ta 2 O 5 , and the material of the second inorganic barrier layer 12 - 3 is Al 2 O 3 .

[0047] Specifically, the thickness of the water and oxygen barrier film 13 is 5nm, the thickness of the first inorganic barrier layer 12-1 is 5nm, the thickness of the second inorganic barrier layer 12-3 is 5nm, and the thickness of the organic buffer layer 12-2 is 10nm; the total thickness of the package body is 25nm, thereby reducing the overall thickness of the perovskite photovoltaic module, which is beneficial to improving the flexibility of the perovskite photovoltaic module.

[0048] Specifically, the material of the organic buffer layer 12 - 2 is a high molecular polymer.

[0049] Example 2

[0050] This embodiment provides a packaging structure of a flexible perovskite photovoltaic module, comprising a substrate 10, a perovskite battery layer 11, and a packaging body for coating the perovskite battery layer 11, which are stacked in sequence;

[0051] The package body includes a first inorganic barrier layer 12-1, an organic buffer layer 12-2, and a second inorganic barrier layer 12-3 which are stacked in sequence; the package body also includes a water-oxygen barrier film 13, which is arranged between the first inorganic barrier layer 12-1 and the perovskite battery layer 11, and the water-oxygen barrier film 13 is coated on the top edge and circumference of the perovskite battery layer 11; see Figure 2 shown.

[0052] Specifically, the vertical projection area of ​​the second inorganic barrier layer 12-3 on the substrate 10 is larger than the vertical projection area of ​​the organic buffer layer 12-2 and the first inorganic barrier layer 12-1 on the substrate 10, and the vertical projection area of ​​the organic buffer layer 12-2 on the substrate 10 is smaller than the vertical projection area of ​​the first inorganic barrier layer 12-1 on the substrate 10.

[0053] Specifically, the perovskite cell layer 11 is separated by two grooves to form three sub-cell structures 14, and the sub-cell structure 14 includes a light-emitting effective area 14-1 and a laser-scribed area 14-2;

[0054] The perovskite battery layer 11 includes a conductive layer 11 - 1 , a first carrier layer 11 - 2 , a perovskite layer 11 - 3 , a second carrier layer 11 - 4 , and a back electrode layer 11 - 5 which are stacked in sequence.

[0055] Specifically, each of the groove portions includes a first groove P1, a second groove P2 and a third groove P3 which are arranged in parallel; the first groove P1 passes through the conductive layer 11-1, and is filled with a first material which is the same as the material of the first carrier layer 11-2; the second groove P2 passes through the first carrier layer 11-2, the perovskite layer 11-3, and the second carrier layer 11-4 in sequence, and is filled with a second material which is the same as the material of the back electrode layer 11-5; the third groove P3 passes through the first carrier layer 11-2, the perovskite layer 11-3, the second carrier layer 11-4, and the back electrode layer 11-5 in sequence, and is filled with a third material which is the same as the material of the first inorganic barrier layer 12-1; the third groove P3 is filled with the first inorganic barrier layer 12-1 material, so that the sub-battery structures 14 are also well isolated.

[0056] Specifically, the laser scribing area 14 - 2 includes a first groove P1 , a second groove P2 , and a third groove P3 .

[0057] Specifically, the projection area of ​​the first inorganic barrier layer 12-1 in the vertical direction of the substrate 10 is larger than the projection area of ​​the water and oxygen barrier film 13 in the vertical direction of the substrate 10, the projection area of ​​the organic buffer layer 12-2 in the vertical direction of the substrate 10 is smaller than the projection area of ​​the first inorganic barrier layer 12-1 in the vertical direction of the substrate 10, and the projection area of ​​the second inorganic barrier layer 12-3 in the vertical direction on the substrate 10 is larger than the projection area of ​​the first inorganic barrier layer 12-1 in the vertical direction on the substrate 10; the above arrangement makes the water and oxygen barrier film 13 completely wrapped around the top edge and circumference of the perovskite battery layer 11, and the first An inorganic barrier layer 12-1 completely encapsulates the perovskite cell layer 11 and the water-oxygen barrier film 13 on the substrate 10, and a second inorganic barrier layer 12-3 completely encapsulates the organic buffer layer 12-2 on the first inorganic barrier layer 12-1, and at the same time encapsulates the first inorganic barrier layer 12-1 on the substrate 10; the water-oxygen barrier film 13 can cooperate with the first inorganic barrier layer 12-1, the second inorganic barrier layer 12-3, and the organic buffer layer 12-2 through physical adsorption or chemical reaction, and can effectively avoid the damage of water and oxygen to the perovskite photovoltaic module, thereby improving the service life of the perovskite photovoltaic module.

[0058] Specifically, the material of the water and oxygen barrier film 13 is an alloy of one or more of Li, Na, K, Rb, Cs, Mg, Ca and Ba.

[0059] Specifically, the material of the first inorganic barrier layer 12 - 1 is a mixture of ZrO 2 and MgO, and the material of the second inorganic barrier layer 12 - 3 is a mixture of HfO 2 and Ta 2 O 5 .

[0060] Specifically, the thickness of the water and oxygen barrier film 13 is 1 μm, the thickness of the first inorganic barrier layer 12-1 is 10 μm, the thickness of the second inorganic barrier layer 12-3 is 10 μm, and the thickness of the organic buffer layer 12-2 is 100 μm; the total thickness of the package body is 121 μm, thereby reducing the overall thickness of the perovskite photovoltaic module, which is beneficial to improving the flexibility of the perovskite photovoltaic module, and can also play a role in releasing the stress in the inorganic barrier layer in the stacked structure.

[0061] Specifically, the material of the organic buffer layer 12 - 2 is a resin material, preferably an acrylic resin.

[0062] Example 3

[0063] This embodiment provides a packaging structure of a flexible perovskite photovoltaic module, comprising a substrate 10, a perovskite battery layer 11, and a packaging body for coating the perovskite battery layer 11, which are stacked in sequence;

[0064] The package body includes a first inorganic barrier layer 12-1, an organic buffer layer 12-2, and a second inorganic barrier layer 12-3 which are stacked in sequence; the package body also includes a water-oxygen barrier film 13, which is arranged between the organic buffer layer 12-2 and the second inorganic barrier layer 12-3; see Figure 3 shown.

[0065] Specifically, the vertical projection area of ​​the second inorganic barrier layer 12-3 on the substrate 10 is larger than the vertical projection area of ​​the organic buffer layer 12-2 and the first inorganic barrier layer 12-1 on the substrate 10, and the vertical projection area of ​​the organic buffer layer 12-2 on the substrate 10 is smaller than the vertical projection area of ​​the first inorganic barrier layer 12-1 on the substrate 10.

[0066] Specifically, the perovskite cell layer 11 is separated by a groove to form two sub-cell structures 14, and the sub-cell structure 14 includes a light-emitting effective area 14-1 and a laser-scribed area 14-2;

[0067] The perovskite battery layer 11 includes a conductive layer 11 - 1 , a first carrier layer 11 - 2 , a perovskite layer 11 - 3 , a second carrier layer 11 - 4 , and a back electrode layer 11 - 5 which are stacked in sequence.

[0068] Specifically, the groove portion includes a first groove P1, a second groove P2 and a third groove P3 arranged in parallel; the first groove P1 penetrates the conductive layer 11-1, and the first groove P1 is filled with a first material that is the same as the material of the first carrier layer 11-2; the second groove P2 sequentially penetrates the first carrier layer 11-2, the perovskite layer 11-3, and the second carrier layer 11-4, and the second groove P2 is filled with a second material that is the same as the material of the back electrode layer 11-5; the third groove P3 sequentially penetrates the first carrier layer 11-2, the perovskite layer 11-3, The second carrier layer 11-4 and the back electrode layer 11-5, the third groove P3 is filled with a third material that is the same as the first inorganic barrier layer 12-1 material; the third groove P3 is filled with the first inorganic barrier layer 12-1 material, so that the sub-battery structures 14 are also well isolated; the water and oxygen barrier film 13 can cooperate with the first inorganic barrier layer 12-1, the second inorganic barrier layer 12-3, and the organic buffer layer 12-2 through physical adsorption or chemical reaction, and can effectively prevent water and oxygen from damaging the perovskite photovoltaic module, thereby improving the service life of the perovskite photovoltaic module.

[0069] Specifically, the laser scribing area 14 - 2 includes a first groove P1 , a second groove P2 , and a third groove P3 .

[0070] Specifically, the projection area of ​​the organic buffer layer 12-2 in the vertical direction of the substrate 10 is smaller than the projection area of ​​the first inorganic barrier layer 12-1 in the vertical direction of the substrate 10, the projection area of ​​the water and oxygen barrier film 13 on the substrate 10 is larger than the projection area of ​​the organic buffer layer 12-2 in the vertical direction of the substrate 10, and the projection area of ​​the second inorganic barrier layer 12-3 on the substrate 10 is larger than the projection area of ​​the first inorganic barrier layer 12-1 on the substrate 10; the above-mentioned arrangement enables the first inorganic barrier layer 12-1 to completely encapsulate the perovskite battery layer 11 on the substrate 10, the water and oxygen barrier film 13 and the organic buffer layer 12-2 are completely encapsulated between the first inorganic barrier layer 12-1 and the second inorganic barrier layer 12-3, and at the same time, the second inorganic barrier layer 12-3 encapsulates the first inorganic barrier layer 12-1 on the substrate 10.

[0071] Specifically, the material of the water and oxygen barrier film 13 is Na.

[0072] Specifically, the materials of the first inorganic barrier layer 12 - 1 and the second inorganic barrier layer 12 - 3 are both MgO.

[0073] Specifically, the thickness of the water and oxygen barrier film 13 is 100nm, the thickness of the first inorganic barrier layer 12-1 is 100nm, the thickness of the second inorganic barrier layer 12-3 is 100nm, and the thickness of the organic buffer layer 12-2 is 300nm; the total thickness of the package body is 600nm, thereby reducing the overall thickness of the perovskite photovoltaic module, which is beneficial to improving the flexibility of the perovskite photovoltaic module.

[0074] Specifically, the material of the organic buffer layer 12 - 2 is a high molecular polymer.

[0075] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0076] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A packaging structure of a flexible perovskite photovoltaic module, characterized in that: It comprises a substrate (10), a perovskite battery layer (11) and a packaging body for coating the perovskite battery layer (11) which are stacked in sequence; The package comprises a barrier layer (12) and a water-oxygen barrier film (13); the water-oxygen barrier film (13) is arranged in the barrier layer (12); or, the water-oxygen barrier film (13) is arranged between the barrier layer (12) and the perovskite battery layer (11), and the water-oxygen barrier film (13) is coated on the top edge and circumference of the perovskite battery layer (11).

2. The packaging structure according to claim 1, characterized in that: The barrier layer (12) comprises a first inorganic barrier layer (12-1), an organic buffer layer (12-2), and a second inorganic barrier layer (12-3) which are stacked in sequence.

3. The packaging structure according to claim 2, characterized in that: The projection area of ​​the second inorganic barrier layer (12-3) in the vertical direction on the substrate (10) is greater than the projection areas of the organic buffer layer (12-2) and the first inorganic barrier layer (12-1) in the vertical direction on the substrate (10), and the projection area of ​​the organic buffer layer (12-2) in the vertical direction on the substrate (10) is smaller than the projection area of ​​the first inorganic barrier layer (12-1) in the vertical direction on the substrate (10).

4. The packaging structure according to claim 2, characterized in that: The water and oxygen barrier film (13) is arranged between the organic buffer layer (12-2) and the second inorganic barrier layer (12-3); The vertical projection area of ​​the second inorganic barrier layer (12-3) on the substrate (10) is greater than the vertical projection areas of the water and oxygen barrier film (13), the organic buffer layer (12-2) and the first inorganic barrier layer (12-1) on the substrate (10); the vertical projection area of ​​the first inorganic barrier layer (12-1) on the substrate (10) is greater than the vertical projection areas of the water and oxygen barrier film (13) and the organic buffer layer (12-2) on the substrate (10); the vertical projection area of ​​the water and oxygen barrier film (13) on the substrate (10) is greater than the vertical projection area of ​​the organic buffer layer (12-2) on the substrate (10).

5. The packaging structure according to claim 2, characterized in that: The water and oxygen barrier film (13) is arranged between the first inorganic barrier layer (12-1) and the perovskite cell layer (11); The vertical projection area of ​​the second inorganic barrier layer (12-3) on the substrate (10) is larger than the vertical projection areas of the water and oxygen barrier film (13), the organic buffer layer (12-2) and the first inorganic barrier layer (12-1) on the substrate (10); the vertical projection area of ​​the first inorganic barrier layer (12-1) on the substrate (10) is larger than the vertical projection areas of the organic buffer layer (12-2) and the water and oxygen barrier film (13) on the substrate (10); the vertical projection area of ​​the organic buffer layer (12-2) on the substrate (10) is larger than the vertical projection area of ​​the water and oxygen barrier film (13) on the substrate (10).

6. The packaging structure according to claim 2, characterized in that: The thickness of the first inorganic barrier layer (12-1) and the second inorganic barrier layer (12-3) are both 5nm to 10μm; the thickness of the organic buffer layer (12-2) is 10nm to 100μm.

7. The packaging structure according to claim 2, characterized in that: The material of the water-oxygen barrier film (13) is alkali metal or alkaline earth metal; the thickness of the water-oxygen barrier film (13) is 5 nm to 1 μm.

8. The packaging structure according to claim 7, characterized in that: The material of the water and oxygen barrier film (13) is one of Li, Na, K, Rb, Cs, Mg, Ca and Ba.

9. The packaging structure according to claim 1, characterized in that: The perovskite battery layer (11) is separated by a plurality of grooves to form a plurality of sub-battery structures (14), and the perovskite battery layer (11) comprises a conductive layer (11-1), a first carrier layer (11-2), a perovskite layer (11-3), a second carrier layer (11-4), and a back electrode layer (11-5) which are stacked in sequence.

10. The packaging structure according to claim 9, characterized in that: Each of the groove portions comprises a first groove (P1), a second groove (P2) and a third groove (P3) which are arranged in parallel; the first groove (P1) penetrates the conductive layer (11-1), and the first groove (P1) is filled with a first material which is the same as the material of the first carrier layer (11-2); the second groove (P2) sequentially penetrates the first carrier layer (11-2), the perovskite layer (11-3) and the second carrier layer (11-4), and the second groove (P2) is filled with a second material which is the same as the material of the back electrode layer (11-5); the third groove (P3) sequentially penetrates the first carrier layer (11-2), the perovskite layer (11-3), the second carrier layer (11-4) and the back electrode layer (11-5), and the third groove (P3) is filled with a third material which is the same as the material of the barrier layer (12).

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