Light conversion packaging adhesive film

Abstract

The utility model provides a light conversion packaging adhesive film. The light conversion packaging adhesive film comprises a double-layer light conversion packaging adhesive film and / or a three-layer light conversion packaging adhesive film. The double-layer light conversion packaging adhesive film comprises a base film and a first light conversion layer which are arranged in sequence, and / or the double-layer light conversion packaging adhesive film comprises a first light conversion layer and a second light conversion layer which are arranged in sequence; the three-layer light conversion packaging adhesive film comprises a first light conversion layer, and at least one of the inner layer, the outer layer or the middle layer of the three-layer light conversion packaging adhesive film is the first light conversion layer. The light conversion adhesive film can eliminate blue light, different colors can be customized according to requirements, and the aesthetic feeling of the photovoltaic module is greatly improved while the efficiency of the photovoltaic module is not reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar cells, and in particular relates to a light conversion packaging adhesive film. Background Art

[0002] The spectrum of sunlight ranges from 300 to 2400nm, which can generally be divided into ultraviolet light, visible light and infrared light. When sunlight is incident on a solar cell module, due to the limitation of the solar cell material itself in responding to the wavelength of light, the solar cell can only absorb a part of the light of a specific wavelength.

[0003] Existing solar cell modules add a light conversion layer on the surface of the cell material or directly add a light conversion agent to the packaging material to convert the light in the band where the solar cell responds poorly into light in the band where the solar cell responds better, thereby achieving maximum utilization of sunlight without changing the structure of the solar cell itself.

[0004] At present, the common light-converting packaging film with added light conversion agent can only convert ultraviolet light into blue light, causing the entire photovoltaic module to be blue. Moreover, since the application site of photovoltaic modules is outdoors, such as rooftops, there are certain requirements for the appearance color of photovoltaic modules. In addition, most people do not like to use blue photovoltaic modules on rooftops.

[0005] Therefore, developing a light conversion packaging film that can convert ultraviolet light into visible light, eliminate blue light, and present different colors according to needs is an urgent problem to be solved in this field. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a light conversion encapsulation film, which can eliminate blue light and can be customized in different colors according to needs, thereby greatly improving the aesthetics of the photovoltaic modules without reducing the efficiency of the photovoltaic modules.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a light conversion packaging film, which includes a double-layer light conversion packaging film and / or a triple-layer light conversion packaging film; the double-layer light conversion packaging film includes a base film and a first light conversion layer arranged in sequence, and / or the double-layer light conversion packaging film includes a first light conversion layer and a second light conversion layer arranged in sequence; the triple-layer light conversion packaging film includes a first light conversion layer, and at least one of the inner layer, outer layer or middle layer of the triple-layer light conversion packaging film is the first light conversion layer.

[0009] In the utility model, the light conversion packaging film is designed with a specific structure, that is, by setting a first light conversion layer, so that the photovoltaic module made of the light conversion packaging film can reflect and scatter the blue light emitted after being irradiated by ultraviolet light, thereby achieving the effect of reducing and basically eliminating the blue appearance of the photovoltaic module in terms of visual appearance. At the same time, the packaging film can also be customized in different colors according to customer needs, which does not reduce the efficiency of the photovoltaic module while greatly improving the aesthetics of the photovoltaic module.

[0010] In the present invention, the first light conversion layer includes at least one of a blue light conversion layer, a red light conversion layer or a green light conversion layer.

[0011] In the utility model, light conversion agent particles are distributed in the first light conversion layer.

[0012] In the present invention, the first light conversion layer also includes a base material, and the base material includes but is not limited to ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), etc.; the base material can be purchased from the market or prepared by conventional methods; the light conversion agent particles are also products already existing in the prior art. Exemplarily, the light conversion agent particles of the first light conversion layer are selected from the nano-microspheres disclosed in Example 1 of CN105949379A.

[0013] In the present invention, the mass percentage of the matrix material in the first light conversion layer is ≥99.7%, for example, it can be 99.7%, 99.72%, 99.74%, 99.76%, 99.78%, 99.8%, 99.82%, 99.85%, 99.88%, 99.9%, 99.92%, 99.95%, 99.98%, etc.

[0014] In the present invention, the second light conversion layer includes a base material and a light conversion agent. The base material is derived from materials known in the prior art, including but not limited to ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), etc.; all of which can be purchased commercially or prepared by conventional methods; the light conversion agent is also a product already existing in the prior art. Exemplarily, the light conversion agent of the second light conversion layer is selected from the light conversion agent disclosed in Example 1 of CN105073947A.

[0015] In the utility model, the "first light conversion layer" and "second light conversion layer" mentioned below each independently further include a base material, and the base material includes but is not limited to ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), etc.; the base materials can be purchased from the market or prepared by conventional methods; wherein the mass percentage of the base materials of the first light conversion layer and the second light conversion layer is independently ≥99.7%, for example, it can be 99.7%, 99.72%, 99.74%, 99.76%, 99.78%, 99.8%, 99.82%, 99.85%, 99.88%, 99.9%, 99.92%, 99.95%, 99.98%, etc.; the second light conversion layer also includes a light conversion agent, and the light conversion agent is derived from a known commercially available product.

[0016] In the present invention, the material of the base film can be purchased from the market or prepared by conventional methods, including but not limited to ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE) and the like.

[0017] In the present invention, the materials of the "base film" mentioned below are all derived from materials known in the prior art, including but not limited to ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE) and the like.

[0018] In the utility model, the thickness of the first light conversion layer in the double-layer light conversion packaging film is 100-300μm, for example, it can be 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm, 250μm, 260μm, 270μm, 280μm, 290μm, 300μm, etc.

[0019] In the utility model, the thickness of the base film and the second light conversion layer in the double-layer light conversion encapsulation film is independently 100-300 μm, for example, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, 250 μm, 260 μm, 270 μm, 280 μm, 290 μm, 300 μm, etc.

[0020] In the present invention, the material of the first light conversion layer also includes a second light conversion agent, and the material of the second light conversion agent and the material of the second light conversion layer are selected from the same range.

[0021] In the utility model, the thickness of the first light conversion layer in the three-layer light conversion packaging film is 100-300μm, for example, it can be 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm, 250μm, 260μm, 270μm, 280μm, 290μm, 300μm, etc.

[0022] In the present invention, the three-layer light conversion packaging film includes at least one of light conversion packaging film A, light conversion packaging film B or light conversion packaging film C.

[0023] In the present invention, the light conversion packaging film A comprises a base film and a first light conversion layer; the base film or the first light conversion layer comprises a two-layer structure, and the first light conversion layer is arranged in at least one of the inner layer, outer layer or middle layer of the base film.

[0024] In the present invention, the materials of each layer of the three-layer light conversion packaging film are selected from the same range as the double-layer light conversion packaging film, and are all existing materials in the prior art, which can be purchased commercially or prepared by conventional methods.

[0025] In the utility model, the light conversion packaging film A includes a base film, a first light conversion layer and a base film arranged in sequence; or, the light conversion packaging film A includes a first light conversion layer, a base film and a first light conversion layer arranged in sequence; when the light conversion packaging film A includes two base films or two first light conversion layers, the material types and thicknesses of the two base films or the two first light conversion layers can be the same or different.

[0026] In the present invention, the light conversion packaging film B comprises a base film, a first light conversion layer and a second light conversion layer; the first light conversion layer is located between, inside or outside the base film and the second light conversion layer.

[0027] In the utility model, the light conversion packaging film B includes a base film, a first light conversion layer and a second light conversion layer arranged in sequence; or, the light conversion packaging film B includes a base film, a second light conversion layer and a first light conversion layer arranged in sequence; or, the light conversion packaging film B includes a first light conversion layer, a base film and a second light conversion layer arranged in sequence.

[0028] In the present invention, the light conversion packaging film C includes a first light conversion layer and a second light conversion layer; the first light conversion layer or the second light conversion layer includes a two-layer structure, and the first light conversion layer is arranged in at least one of the inner layer, outer layer or middle layer of the second light conversion layer.

[0029] In the present invention, the light conversion packaging film C includes a first light conversion layer, a second light conversion layer and a first light conversion layer arranged in sequence; or, the light conversion packaging film C includes a second light conversion layer, a first light conversion layer and a second light conversion layer arranged in sequence; when the light conversion packaging film C includes two layers of second light conversion layers or two layers of first light conversion layers, the material types and thicknesses of the two layers of second light conversion layers or the two layers of first light conversion layers may be the same or different.

[0030] In the utility model, the thickness of the base film and the second light conversion layer in the three-layer light conversion packaging film is independently 100-300μm, for example, it can be 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm, 250μm, 260μm, 270μm, 280μm, 290μm, 300μm, etc.

[0031] In the present utility model, the preparation method of the light conversion encapsulation film can be prepared by conventional methods, including but not limited to coating or multi-layer co-extrusion.

[0032] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0033] Compared with the prior art, the beneficial effects of the utility model are:

[0034] The light conversion packaging film provided by the utility model has a specific structural design, so that the photovoltaic module made of the light conversion packaging film can reflect and scatter the blue light emitted after being irradiated by ultraviolet light, so that the visual appearance of the photovoltaic module can be reduced and basically eliminated. At the same time, the packaging film can also be customized in different colors according to customer needs, which does not reduce the efficiency of the photovoltaic module while greatly improving the aesthetics of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a light conversion packaging film provided in Example 1 of the utility model;

[0036] Among them, 1-base film; 2-first light conversion layer; 3-light conversion agent particles; 4-light conversion agent; 5-incident light (from top to bottom) and reflected light (from bottom to top);

[0037] Figure 2 A schematic diagram of a light conversion packaging film provided in Example 2 of the utility model;

[0038] Wherein, 1-second light conversion layer; 2-first light conversion layer;

[0039] Figure 3 A schematic diagram of a light conversion packaging film provided in Example 3 of the utility model;

[0040] Wherein: 1-base film; 2-first light conversion layer;

[0041] Figure 4 A schematic diagram of a light conversion packaging film provided in Example 4 of the utility model;

[0042] Among them, 1-base film; 2-first light conversion layer; 3-base film; 4-light conversion agent particles; 5-light conversion agent; 6-incident light (from top to bottom) and reflected light (from bottom to top);

[0043] Figure 5 A schematic diagram of a light conversion packaging film provided in Example 5 of the utility model;

[0044] Wherein, 1-first light conversion layer; 2-base film; 3-first light conversion layer; 4-light conversion agent particles; 5-light conversion agent;

[0045] Figure 6 A schematic diagram of a light conversion packaging film provided in Example 6 of the utility model;

[0046] Wherein, 1-base film; 2-first light conversion layer; 3-second light conversion layer;

[0047] Figure 7 A schematic diagram of a light conversion packaging film provided in Example 7 of the utility model;

[0048] Wherein, 1-base film; 2-second light conversion layer; 3-first light conversion layer;

[0049] Figure 8 A schematic diagram of a light conversion packaging film provided in Example 8 of the utility model;

[0050] Wherein, 1-first light conversion layer; 2-base film; 3-second light conversion layer;

[0051] Fig. 9 A schematic diagram of a light conversion packaging film provided in Example 9 of the utility model;

[0052] Wherein, 1-first light conversion layer; 2-second light conversion layer; 3-first light conversion layer;

[0053] Fig.10 A schematic diagram of a light conversion packaging film provided in Example 10 of the utility model;

[0054] Among them, 1-second light conversion layer; 2-first light conversion layer; 3-second light conversion layer;

[0055] Fig.11 A schematic diagram of a light conversion packaging film provided in Example 11 of the utility model;

[0056] Wherein: 1-base film; 2-first light conversion layer; 3-base film;

[0057] Fig.12 A schematic diagram of a light conversion packaging film provided in Example 12 of the utility model;

[0058] Among them, 1-first light conversion layer; 2-base film; 3-first light conversion layer. DETAILED DESCRIPTION

[0059] The technical solution of the present invention is further described below by means of specific implementation methods. Those skilled in the art should understand that the embodiments are only used to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0060] The materials used in this utility model are as follows:

[0061] Base film: EVA;

[0062] Light conversion agent particles: selected from the nano-microspheres disclosed in Example 1 of CN105949379A.

[0063] Photoconversion agent: selected from the photoconversion agent disclosed in Example 1 of CN105073947A.

[0064] In the present invention, the material contents in all embodiments and comparative examples refer to the mass percentage.

[0065] Example 1

[0066] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 1 As shown, it includes a base film 1 (with a thickness of 250 μm) and a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion material; the light conversion material includes light conversion agent particles and light conversion agent in a mass ratio of 0.3%, with a thickness of 250 μm) arranged in sequence.

[0067] Example 2

[0068] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 2 As shown, it includes a second light conversion layer 1 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 250μm) and a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 250μm) which are arranged in sequence.

[0069] Example 3

[0070] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 3 As shown, it includes a base film 1 (with a thickness of 250 μm) and a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 250 μm) which are arranged in sequence.

[0071] Example 4

[0072] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 4 As shown, it includes a base film 1 (with a thickness of 150 μm), a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion material; the light conversion material includes light conversion agent particles and light conversion agent with a mass ratio of 0.3%, and a thickness of 200 μm) and a base film 3 (with a thickness of 150 μm) which are arranged in sequence.

[0073] Example 5

[0074] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 5 As shown, it includes a first light conversion layer 1 (the material includes 99.8% EVA and 0.2% light conversion material; the light conversion material includes light conversion agent particles and light conversion agent with a mass ratio of 0.3%, and a thickness of 150μm), a base film 2 (with a thickness of 200μm) and a first light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion material; the light conversion material includes light conversion agent particles and light conversion agent with a mass ratio of 0.3%, and a thickness of 150μm) which are arranged in sequence.

[0075] Example 6

[0076] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 6 As shown, it includes a base film 1 (with a thickness of 150 μm), a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm) and a second light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 150 μm) which are arranged in sequence.

[0077] Example 7

[0078] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 7 As shown, it includes a base film 1 (with a thickness of 150 μm), a second light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 150 μm) and a first light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm) which are arranged in sequence.

[0079] Example 8

[0080] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Figure 8 As shown, it includes a first light conversion layer 1 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm), a base film 2 (with a thickness of 150 μm) and a second light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 150 μm) which are arranged in sequence.

[0081] Example 9

[0082] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Fig. 9 As shown, it includes a first light conversion layer 1 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm), a second light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 200 μm) and a first light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm) which are arranged in sequence.

[0083] Example 10

[0084] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Fig.10 As shown, it includes a second light conversion layer 1 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 150μm), a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 200μm) and a second light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion agent, with a thickness of 150μm) which are arranged in sequence.

[0085] Embodiment 11

[0086] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Fig.11 As shown, it includes a base film 1 (with a thickness of 150 μm), a first light conversion layer 2 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 200 μm) and a base film 3 (with a thickness of 150 μm) which are arranged in sequence.

[0087] Example 12

[0088] This embodiment provides a light conversion packaging film, and its structural schematic diagram is as follows Fig.12As shown, it includes a first light conversion layer 1 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm), a base film 2 (with a thickness of 200 μm) and a first light conversion layer 3 (the material includes 99.8% EVA and 0.2% light conversion agent particles, with a thickness of 150 μm) which are arranged in sequence.

[0089] Comparative Example 1

[0090] This comparative example provides a light conversion packaging adhesive film, which is different from Example 6 only in that the light conversion packaging adhesive film does not have a first light conversion layer, and the other structures are the same as those of Example 6.

[0091] Performance Testing

[0092] (1) Testing the transmittance of the light conversion encapsulation films obtained in Examples 1 to 12 and Comparative Example 1 at 380-1100 nm, with reference to standard IEC-62788;

[0093] (2) Observe the color of the appearance of the light conversion encapsulation film assembly under sunlight.

[0094] Taking the light conversion packaging adhesive films provided in Examples 1, 2, 10 and Comparative Example 1 as examples, the specific test results are shown in Table 1. It can be seen that the light conversion packaging adhesive provided by the utility model has a transmittance of ≥92.11% at 380-1100nm and a black appearance.

[0095] Table 1

[0096]

[0097] To sum up, the light conversion packaging film provided by the utility model, through a specific structural design, enables the photovoltaic module made of the light conversion packaging film to reflect and scatter the blue light emitted after being irradiated by ultraviolet light, thereby achieving the effect of reducing and basically eliminating the blue appearance of the photovoltaic module. At the same time, the packaging film can also be customized in different colors according to customer needs, which does not reduce the efficiency of the photovoltaic module while greatly improving the aesthetics of the photovoltaic module.

[0098] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A light conversion encapsulation film, characterized in that: The light conversion packaging film includes a double-layer light conversion packaging film and / or a triple-layer light conversion packaging film; The double-layer light conversion packaging film comprises a base film and a first light conversion layer arranged in sequence, and / or the double-layer light conversion packaging film comprises a first light conversion layer and a second light conversion layer arranged in sequence; The three-layer light conversion packaging film comprises a first light conversion layer, and at least one of the inner layer, the outer layer or the middle layer of the three-layer light conversion packaging film is the first light conversion layer; Light conversion agent particles are distributed in the first light conversion layer.

2. The light conversion encapsulation film according to claim 1, characterized in that: The first light conversion layer includes at least one of a blue light conversion layer, a red light conversion layer or a green light conversion layer.

3. The light conversion encapsulation film according to claim 1, characterized in that: The thickness of the first light conversion layer in the double-layer light conversion packaging film is 100-300 μm.

4. The light conversion encapsulation film according to claim 1, characterized in that: The thickness of the base film and the second light conversion layer in the double-layer light conversion packaging film are independently 100-300 μm.

5. The light conversion encapsulation film according to claim 1, characterized in that: The thickness of the first light conversion layer in the three-layer light conversion packaging film is 100-300 μm.

6. The light conversion encapsulation film according to claim 1, characterized in that: The three-layer light conversion packaging film includes at least one of light conversion packaging film A, light conversion packaging film B or light conversion packaging film C; The light conversion packaging film A comprises a base film and a first light conversion layer; the base film or the first light conversion layer comprises a two-layer structure, and the first light conversion layer is arranged in at least one of the inner layer, the outer layer or the middle layer of the base film; The light conversion packaging film B comprises a base film, a first light conversion layer and a second light conversion layer; the first light conversion layer is located between, inside or outside the base film and the second light conversion layer; The light conversion packaging film C includes a first light conversion layer and a second light conversion layer; the first light conversion layer or the second light conversion layer includes a two-layer structure, and the first light conversion layer is arranged in at least one of the inner layer, outer layer or middle layer of the second light conversion layer.

7. The light conversion encapsulation film according to claim 6, characterized in that: The thickness of the base film and the second light conversion layer in the three-layer light conversion packaging film are independently 100-300 μm.

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