Adhesive film layer and photovoltaic module

Abstract

The utility model discloses an adhesive film layer and a photovoltaic assembly, the hierarchical structure of the adhesive film layer is improved, a high-transmittance layer is added, a light conversion layer can be formed by adopting an inorganic material, such as an inorganic metal material or an inorganic-organic hybrid material, under the barrier action of the high-transmittance layer, the stability of the light conversion layer is improved, and the light conversion layer is more stable. Metal ions and the like from the light conversion layer are blocked by the high-transmittance layer, so that the damage of the metal ions to a crystalline silicon battery is avoided, and the stability of the photovoltaic module containing the adhesive film layer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an adhesive film layer and a photovoltaic component comprising the adhesive film layer. Background Art

[0002] Crystalline silicon technology is currently the most effective technology for converting sunlight into electrical energy. The latest generation of heterojunction technology has greatly improved the performance of crystalline silicon cells by using hydrogenated amorphous silicon to passivate interface defects. Hydrogen-rich amorphous silicon (ia-Si:H) is used in heterojunction cells to passivate the crystalline silicon interface contact, greatly improving the conversion efficiency of heterojunction cells. However, ultraviolet rays in sunlight can cause hydrogen atoms in ia-Si:H to escape from the interface, reducing the passivation effect of the interface and thus reducing the conversion efficiency of the cell.

[0003] Therefore, the encapsulation film used in heterojunction cells, such as the cut-off layer, has the function of cutting off ultraviolet light, but the cut-off layer will block most or all of the light that is harmful to photovoltaic modules (such as crystalline silicon cells), reducing the utilization rate of light. In response to this, some companies have improved the hierarchical structure of the encapsulation film, such as the configuration of stacking the light conversion layer and the cut-off layer, and the wavelength of the incident light is converted by the light conversion layer to convert it into light that can be absorbed by the battery layer. The cut-off layer cuts off the light that is harmful to the battery layer and improves stability.

[0004] The defects are: the light conversion layer is often formed of organic materials, which are sensitive to ultraviolet light and will gradually fail during operation. The battery layer is damaged under ultraviolet light and has poor stability. The light conversion layer is often formed of inorganic materials, such as inorganic materials containing metal ions. Metal ions are harmful to crystalline silicon. The stacked structure of the light conversion layer and the cutoff layer has insufficient barrier effect on metal ions. During operation, the metal ions that are released contact the battery cell, which in turn damages the crystalline silicon battery cell. The stability is poor and needs to be improved. Utility Model Content

[0005] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0006] The first aspect of the present application document discloses a film layer, comprising a light conversion layer and a cutoff layer stacked from top to bottom, wherein the light conversion layer is used to convert the wavelength of incident light to a predetermined range, and the cutoff layer is used to cut off part of the incident light, and a high-transmittance layer is arranged between the cutoff layer and the light conversion layer or below the cutoff layer.

[0007] Furthermore, the light conversion layer is formed of inorganic materials or inorganic-organic hybrid materials.

[0008] Furthermore, the light conversion layer is formed of an inorganic metal material.

[0009] Furthermore, the light conversion layer contains Ce3+ 、Sm 3+ 、Eu 3+ 、Eu 2+ , Tb 3+ 、Bi 3+ 、Dy 3+ 、Ag + , Cs + , Rb + , K + 、In 3 + , Ga 3+ 、Al 3+ , Y 3+ One or more of.

[0010] The second aspect of the present application document discloses a photovoltaic module, comprising a battery layer, on which the above-mentioned adhesive film layer is disposed.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model improves the hierarchical structure of the adhesive film layer and adds a high-transmittance layer. Under the barrier effect of the high-transmittance layer, the light conversion layer can be formed by inorganic materials, such as inorganic metal materials or inorganic materials and metal ion / organic ligand complexes. The stability of the light conversion layer is improved, and the high-transmittance layer is used to block the metal ions from the light conversion layer to avoid the damage of the metal ions to the crystalline silicon battery. The stability of the photovoltaic module containing the adhesive film layer is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the photovoltaic module;

[0015] Figure 2 It is a schematic diagram of the structure of the photovoltaic module;

[0016] Wherein, the accompanying drawings are marked as follows:

[0017] 1. Light conversion layer; 2. High transmittance layer; 3. Cut-off layer; 4. Battery layer. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] like Figure 1 As shown, in this example, a photovoltaic module includes a battery layer and a film layer. The battery layer is such as a crystalline silicon battery sheet, and the film layer is arranged on the battery layer.

[0021] In this example, the adhesive film layer includes a light conversion layer 1 and a cutoff layer 3 stacked from top to bottom. The light conversion layer 1 is used to convert the wavelength of the incident light to a predetermined range, such as converting ultraviolet light (wavelength 200-400nm) into usable light (wavelength 400-600nm) that can be absorbed by the battery layer. The cutoff layer 3 is used to cut off part of the incident light, such as cutting off part of the ultraviolet light that has not been converted and passed through the light conversion layer through the cutoff layer. The light conversion layer and the cutoff layer are commonly used technologies in the field. The thickness, number of layers and molding of the light conversion layer and the cutoff layer can be freely selected according to needs. For the cutoff layer, if a film layer is formed with a material having a cutoff function, the cutoff layer can be selected to be composed of a single film layer. The thickness of the single film layer can be freely selected according to needs. Of course, multiple groups of the film layers can also be selected to be stacked up and down to form a cutoff layer. Of course, the thickness of each film layer can be freely selected according to needs, which will not be repeated here. The cut-off layer and the light conversion layer also have properties such as high transmittance and high transparency, and are formed by doping corresponding functional components (ultraviolet absorption components or light conversion components, etc.) in polymers such as EVA, POE, EPE, PVB, PET, TPU, and silicone.

[0022] In this example, a high-transmittance layer 2 is arranged between the cutoff layer 3 and the light conversion layer 1. The high-transmittance layer is a protective film with high light transmittance and high transparency commonly used in the field, such as EVA, POE, EPE, PVB, PET, TPU, silicone and other polymer moldings, and the above polymer molding film layer (thickness such as 0-1mm, of course, the appropriate thickness can also be selected according to demand, exceeding 1mm, such as 2mm, 3mm, etc.), can be selected as a single layer of the film layer to form a high-transmittance layer, or multiple groups of the film layers can be stacked up and down to form a high-transmittance layer, so as to block the metal ions in the light conversion layer from contacting the battery layer, avoid causing damage to the battery layer, and improve stability. The light conversion layer is formed of inorganic materials, such as inorganic metal materials or inorganic non-metallic materials. Or inorganic and organic hybrid materials, such as metal ion / ligand complexes. Preferably, the metal ions in the light conversion layer 1 contain Ce 3+ 、Sm 3+ 、Eu 3+ 、Eu 2+ , Tb 3+ 、Bi 3+ 、Dy 3+ 、Ag + , Cs + , Rb + , K + 、In 3+ , Ga 3+ 、Al 3+ , Y 3+The stability of the light conversion layer under this material is improved, and the corresponding stability of the photovoltaic module is improved.

[0023] Example 2

[0024] like Figure 2 As shown, the difference from Example 1 is that the film layer in this example includes a light conversion layer 1, a cutoff layer 3, and a high-transmittance layer 2 stacked from top to bottom, the high-transmittance layer 2 is below the cutoff layer 3, and below the high-transmittance layer 2 is a battery layer 4, and the rest is consistent with Example 1.

[0025] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. An adhesive film layer, comprising a light conversion layer (1) and a cut-off layer (3) stacked from top to bottom, wherein the light conversion layer (1) is used to convert the wavelength of incident light to a predetermined range, and the cut-off layer (3) is used to cut off part of the incident light, characterized in that: A high-transmittance layer (2) is arranged between the cut-off layer (3) and the light-conversion layer (1) or below the cut-off layer (3).

2. The adhesive film layer according to claim 1, characterized in that: The light conversion layer (1) is formed of an inorganic material or an inorganic-organic hybrid material.

3. The adhesive film layer according to claim 2, characterized in that: The light conversion layer (1) is formed of an inorganic metal material.

4. A photovoltaic module, comprising a battery layer (4), characterized in that: The battery layer (4) is provided with the adhesive film layer according to any one of claims 1 to 3.

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