Functional film for preventing water and increasing light incoming quantity of perovskite solar cell

Abstract

In order to solve the problems that the hydrophobic and anti-reflection functional film of the conventional perovskite solar cell is high in cost, poor in durability and wear resistance and easy to pollute the environment, the utility model provides the waterproof functional film for the perovskite solar cell and capable of increasing the light incoming quantity, and the hydrophobic and anti-reflection functions are realized through the hydrophobic and anti-reflection structure on the surface of the film. The cost is reduced, the environmental pollution can be avoided, and the wear resistance and durability are also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of thin films, and in particular relates to a functional thin film for waterproofing and increasing light intake for perovskite solar cells. Background Art

[0002] With the development of photoelectric conversion devices, especially the popularity of new energy vehicles, photoelectric conversion devices such as perovskite cells have become a hot topic for researchers. As an energy conversion device with high photoelectric conversion efficiency and flexible characteristics, perovskite cells are considered to be one of the important technologies in the future energy field. However, perovskite cells have poor stability in high humidity environments, which affects their photoelectric conversion efficiency and limits their reliability and long-term stability in practical applications.

[0003] Therefore, the development of a functional film with increased light intake and waterproof properties is of great significance to improving the performance of perovskite cells. At present, the cost of preparing films with composite functions is relatively high, mainly relying on the inherent properties of the chemical materials coated on the surface of the film to give the surface hydrophobicity and anti-permeability, or adding multilayer films to improve optical properties. However, this film preparation process that relies on chemical modification requires not only large-format films, but also a large amount of chemical substances, leading to rising costs and environmental pollution. At the same time, the preparation of this composite functional film requires multiple processing techniques, which further increases the cost. In addition, flexible batteries require good durability and wear resistance, and traditional functional surface films coated with nanomaterials are difficult to meet the above requirements. Utility Model Content

[0004] Based on this, in order to solve the above technical problems, a functional film for waterproofing and increasing the amount of light entering perovskite solar cells is provided.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A functional film for waterproofing and increasing the amount of light entering a perovskite solar cell, characterized in that it includes a film body made of UV glue material, the thickness of the film body is 20-115 microns, and its upper surface has a hydrophobic anti-reflection structure, the hydrophobic anti-reflection structure includes a plurality of hydrophobic protrusions and a plurality of anti-reflection microprisms, the plurality of hydrophobic protrusions and the plurality of anti-reflection microprisms are staggered, the height of the hydrophobic protrusions is 10-30 microns, and the width is 25-30 microns, the height of the anti-reflection microprisms is 10-30 microns, and the width is 50-100 microns.

[0007] The film of the utility model has the functions of waterproofing, moisture-proofing and anti-reflection, so that the perovskite solar cell has better stability in a high humidity environment, and significantly increases the amount of light entering, so that the output current of the perovskite solar cell can be increased, and the stability of the battery is improved. The film is not like the prior art, which gives the film surface hydrophobicity and anti-reflection through the inherent properties of the chemical material on the film surface, but is achieved through the hydrophobic anti-reflection structure on the film surface, which reduces costs, avoids environmental pollution, and also improves wear resistance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments:

[0009] Figure 1 A schematic diagram of the structure of a functional film for waterproofing and increasing light intake for a perovskite solar cell provided in an embodiment of the utility model;

[0010] Figure 2 It is a schematic diagram of a staggered distribution of the hydrophobic protrusions and the anti-reflection microprisms of the utility model;

[0011] Figure 3 It is a schematic diagram of another staggered distribution mode of the hydrophobic protrusions and the anti-reflection microprisms of the utility model. DETAILED DESCRIPTION

[0012] The following will illustrate the implementation methods of the utility model in conjunction with the drawings in the specification. It should be noted that the implementation methods involved in this specification are not exhaustive and do not represent the only implementation methods of the utility model. The following corresponding embodiments are only for the purpose of clearly illustrating the utility model content of the utility model patent, and are not intended to limit its implementation methods. For ordinary technicians in this field, different forms of changes and modifications can be made on the basis of the description of this embodiment. All obvious changes or modifications that belong to the technical concept and utility model content of the utility model are also within the scope of protection of the utility model.

[0013] like Figure 1 As shown, an embodiment of the utility model provides a functional film for waterproofing and increasing light intake of a perovskite solar cell, including a film body 110 made of UV glue material.

[0014] Figure 1 A schematic diagram showing a functional film of an embodiment of the utility model being encapsulated onto a substrate 2 of a perovskite solar cell (such as a PET substrate, the lower surface of the substrate 2 being the conductive layer 3 of the cell).

[0015] The upper surface of the membrane body 110 has a hydrophobic anti-reflection structure, which includes a plurality of hydrophobic protrusions 111 and a plurality of anti-reflection microprisms 112 .

[0016] The refractive index of the film body 110 is 1.33. Such a gradient change in the refractive index can effectively increase the amount of light entering the film and reduce reflection.

[0017] The thickness of the membrane body 110 is as thin as possible and can be selected within the range of 20-115 microns. It should be noted that the thickness here does not include the height of the hydrophobic anti-reflection structure.

[0018] The hydrophobic protrusions 111 are used to provide the film with hydrophobicity, and the anti-reflection microprisms 112 are used to provide the film with the ability to increase the amount of light entering.

[0019] The plurality of hydrophobic protrusions 111 and the plurality of anti-reflection microprisms 112 are arranged alternately.

[0020] like Figure 2 As shown, in one embodiment, the plurality of hydrophobic protrusions 111 are distributed in four directions, and the plurality of anti-reflection microprisms 112 are distributed in four directions.

[0021] like Figure 3 As shown, in another embodiment, the plurality of hydrophobic protrusions 111 are distributed in a triangular pattern, and the plurality of anti-reflection microprisms 112 are distributed in a triangular pattern.

[0022] Adjacent hydrophobic protrusions 111 and anti-reflection microprisms 112 may be sparsely arranged, i.e. with gaps therebetween, or densely arranged, i.e. without gaps therebetween, thereby giving the film surface functions such as hydrophobicity, anti-reflection, and self-cleaning.

[0023] The height of the hydrophobic protrusion 111 is 10-30 microns, and the width is 25-30 microns. The height of the anti-reflection microprism 112 is 10-30 microns, and the width is 50-100 microns.

[0024] Preferably, the height of the hydrophobic protrusion 111 is 30 microns and the width is 30 microns, and the height of the anti-reflection microprism 112 is 30 microns and the width is 50 microns. The higher the height and the higher the aspect ratio, the better the hydrophobicity and anti-reflection properties. The above dimensions are close to the process limit.

[0025] The hydrophobic protrusion 111 is in a columnar shape, such as a cylindrical shape, or a columnar shape that is wide at the bottom and narrow at the top. In this embodiment, its width refers to the width of the top surface. The microprism 112 may be a quadrangular pyramid prism, and its width refers to the width of the bottom surface. In order to further improve the hydrophobic ability, a plurality of evenly distributed secondary protrusions may be further provided on the top surface of the hydrophobic protrusion 111.

[0026] From the above, it can be seen that the film provided by the embodiment of the utility model has the functions of waterproofing, moisture-proofing and anti-reflection, so that the perovskite solar cell has better stability in a high humidity environment, and significantly improves the amount of light entering, so that the output current of the perovskite solar cell can be improved, and the stability of the battery is improved. The film is not like the prior art, which gives the film surface hydrophobicity and anti-reflection through the inherent properties of the chemical material on the surface of the film, but is achieved through the hydrophobic anti-reflection structure on the surface of the film, which reduces costs, avoids environmental pollution, and also improves wear resistance and durability.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A functional film for waterproofing and increasing light intake of perovskite solar cells, characterized in that: The invention relates to a membrane body made of UV glue material, wherein the thickness of the membrane body is 20-115 microns, and the upper surface of the membrane body has a hydrophobic anti-reflection structure, wherein the hydrophobic anti-reflection structure comprises a plurality of hydrophobic protrusions and a plurality of anti-reflection microprisms, wherein the plurality of hydrophobic protrusions and the plurality of anti-reflection microprisms are staggeredly distributed, wherein the height of the hydrophobic protrusions is 10-30 microns, and the width is 25-30 microns, and the height of the anti-reflection microprisms is 10-30 microns, and the width is 50-100 microns.

2. A functional film for waterproofing and increasing light intake for perovskite solar cells according to claim 1, characterized in that: The refractive index of the film body is 1.

33.

3. A functional film for waterproofing and increasing light intake for perovskite solar cells according to claim 1, characterized in that: Adjacent hydrophobic protrusions and anti-reflection microprisms are sparsely arranged or densely arranged.

4. A functional film for waterproofing and increasing light intake for perovskite solar cells according to claim 1, characterized in that: The plurality of hydrophobic protrusions are distributed in four directions, and the plurality of anti-reflection microprisms are distributed in four directions.

5. A functional film for waterproofing and increasing light intake for perovskite solar cells according to claim 1, characterized in that: The plurality of hydrophobic protrusions are distributed in a triangular pattern, and the plurality of anti-reflection microprisms are distributed in a triangular pattern.

6. A functional film for waterproofing and increasing light intake for perovskite solar cells according to claim 1, characterized in that: The hydrophobic protrusion is columnar.

7. A functional film for waterproofing and increasing light intake for perovskite solar cells according to claim 1, characterized in that: The anti-reflection microprism is a quadrangular pyramid prism.

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