Solar cell module

Abstract

According to the present invention, a pattern print layer has: a first color pattern layer (10) which is provided on one surface of a translucent base material and is composed of a plurality of first color dots (11); and a second color pattern layer (20) which is provided on the first color pattern layer (10) and is composed of a plurality of second color dots (21). In a printed material, each of the plurality of first color dots (11) contains a binder (12) for the first color and a plurality of first color pigment chips (13) which are dispersed inside the binder (12) for the first color, each of the plurality of second color dots (21) contains a binder (22) for the second color and a plurality of second color pigment chips (23) which are dispersed inside the binder (22) for the second color, one of the plurality of first color pigment chips (13) and the plurality of second color pigment chips (23) are composed of first interference pigments (14a, 14b) in a plurality of colors, the first interference pigments respectively generating mutually different first interference light, the other of the plurality of first color pigment chips (13) and the plurality of second color pigment chips (23) are composed of a second interference pigment (24) that generates second interference light of a single color that is different from a color mixture expressed by the plurality of first interference pigments (14a, 14b), and the plurality of colors of first interference light and the second interference light are additively mixed.

Description

solar cell module

[0001] The present disclosure relates to solar cell modules.

[0002] With the aim of achieving carbon neutrality by 2050 and a carbon-free society, there is a need for the widespread adoption of ZEBs (Net Zero Energy Buildings), which can significantly reduce energy consumption in buildings. A ZEB is a building that aims to achieve a zero annual balance of primary energy consumption while providing a comfortable indoor environment. Because people are active inside a building, it is impossible to reduce energy consumption completely to zero. However, by reducing energy consumption through energy conservation measures and generating the equivalent energy through energy generation, it is possible to achieve net energy consumption of zero.

[0003] Energy generation methods that do not use fossil fuels include, for example, solar power generation, wind power generation, biomass power generation, etc. As an energy generation method for buildings, solar power generation is suitable when taking into account installation location and costs.

[0004] The rooftop area of ​​buildings is taken up by outdoor units for air conditioning and other equipment, so in order to generate electricity, solar cell modules had to be installed on the walls as well as the roof.

[0005] Japanese Patent Publication No. 2021-027266 Japanese Patent No. 5725581 Japanese Patent No. 6839319

[0006] When a solar cell module is installed on a wall, conventional solar cell modules do not have sufficient design features, and improvements are desired.

[0007] An object of the present disclosure is to provide a solar cell module with improved design.

[0008] One aspect of the present disclosure relates to a solar cell module including a solar cell and a printed material disposed on the light-receiving surface side of the solar cell, the printed material having a translucent substrate and a picture print layer. In this solar cell module, the picture print layer includes a first color pattern layer provided on one surface of the translucent substrate and composed of a plurality of first color dots, and a second color pattern layer provided on the first color pattern layer and composed of a plurality of second color dots. In this printed matter, each of the multiple first color dots includes a first color binder and multiple first color pigment chips dispersed within the first color binder, each of the multiple second color dots includes a second color binder and multiple second color pigment chips dispersed within the second color binder, one of the multiple first color pigment chips and the multiple second color pigment chips is a multiple-color first interference pigment that generates first interference light that is different from the other, and the other of the multiple first color pigment chips and the multiple second color pigment chips is a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the multiple first interference pigments, and the multiple first interference lights and the second interference lights are additively mixed.

[0009] A solar cell module according to one aspect of the present disclosure includes, as one aspect, a solar cell and a vapor deposition layer disposed on a light-receiving surface side of the solar cell and formed by vapor deposition of a metal.

[0010] One aspect of the present disclosure relates to a solar cell module including at least one solar cell and a printed material having a picture print layer disposed on the light-receiving surface side of the solar cell. The picture print layer includes a first color pattern layer including a plurality of first color dots and a second color pattern layer overlapping the first color pattern layer and including a plurality of second color dots. Each of the first color dots includes a first color binder and a plurality of first color pigment chips dispersed within the first color binder, and each of the second color dots includes a second color binder and a plurality of second color pigment chips dispersed within the second color binder. One of the first color pigment chips and the second color pigment chips is a first interference pigment of multiple colors that generates first interference light that is different from each other, and the other of the first color pigment chips and the second color pigment chips is a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the first interference pigment of multiple colors. At least one of the first interference pigment and the second interference pigment contains a small particle size grade interference pigment having a particle size range of 5 μm to 25 μm and a large particle size grade interference pigment having a particle size range of 25 μm to 40 μm. In the picture printed layer of this solar cell module, the small particle size grade interference pigment is arranged so as to fill gaps between the large particle size grade interference pigments, and a plurality of first interference lights and second interference lights are additively mixed.

[0011] According to the present disclosure, a solar cell module with improved design can be provided.

[0012] FIG. 1 is a cross-sectional view schematically showing a solar cell module according to embodiment 1-1. FIG. 2 is a cross-sectional view schematically showing a printed matter provided on the solar cell module shown in FIG. 1. FIG. 3 is a cross-sectional view schematically showing a picture print layer provided on the printed matter shown in FIG. 2. FIG. 4 is a cross-sectional view schematically showing a printed matter on the solar cell module according to embodiment 1-2. FIG. 5 is a cross-sectional view schematically showing a white pattern layer provided on the printed matter shown in FIG. 4. FIG. 6 is a cross-sectional view schematically showing a printed matter on the solar cell module according to embodiment 1-3. FIG. 7 is a cross-sectional view schematically showing a printed matter on the solar cell module according to embodiment 1-4. FIG. 8 is a cross-sectional view schematically showing a solar cell module according to embodiment 2-1. FIG. 9 is a cross-sectional view schematically showing a solar cell module according to embodiment 2-2. FIG. 10 is a cross-sectional view schematically showing a solar cell module according to embodiment 2-3. FIG. 11 is a cross-sectional view schematically showing a solar cell module according to embodiment 2-4. FIG. 12 is a cross-sectional view schematically showing a solar cell module according to embodiment 2-5. Fig. 13 is a cross-sectional view schematically showing a solar cell module according to an embodiment of the third disclosure. Fig. 14 is a cross-sectional view schematically showing a picture print layer of a printed matter.

[0013] [First Disclosure] The printed matter described in Japanese Patent No. 5725581 includes a first color pattern layer, a second color pattern layer, and a third color pattern layer, each containing a red interference pigment, a green interference pigment, or a blue interference pigment as pigment chips. This printed matter has a larger number of pattern layers to achieve more vivid colors than conventional printing. The decorative sheet described in Japanese Patent No. 6839319 includes a first design layer containing multiple types of interference pigments and exhibiting a first mixed color, and a second design layer containing multiple types of interference pigments and exhibiting a second mixed color different from the first mixed color. Because the first and second design layers each contain multiple types of interference pigments, this decorative sheet may require complicated color matching and registration during printing. Therefore, combining the printed matter described in Japanese Patent No. 5725581 or Japanese Patent No. 6839319 with a solar cell module may result in these problems. Furthermore, since solar cell modules generate electricity by receiving sunlight, if the sunlight is blocked excessively by printed matter, there is a problem that power generation efficiency will decrease.

[0014] The present disclosure is intended to solve the above-mentioned problems, and aims to provide a solar cell module that can express a three-dimensional image even with a small number of printing layers, has printed matter that can simplify color matching and registration work during printing, and can suppress a decrease in power generation efficiency.

[0015] [1] In one aspect, the present disclosure relates to a solar cell module including a solar cell and a printed material disposed on the light-receiving surface side of the solar cell, the printed material having a translucent substrate and a picture print layer. In this solar cell module, the picture print layer includes a first color pattern layer provided on one surface of the translucent substrate and composed of a plurality of first color dots, and a second color pattern layer provided on the first color pattern layer and composed of a plurality of second color dots. In this printed matter, each of the multiple first color dots includes a first color binder and multiple first color pigment chips dispersed within the first color binder, each of the multiple second color dots includes a second color binder and multiple second color pigment chips dispersed within the second color binder, one of the multiple first color pigment chips and the multiple second color pigment chips is a multiple-color first interference pigment that generates first interference light that is different from the other, and the other of the multiple first color pigment chips and the multiple second color pigment chips is a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the multiple first interference pigments, and the multiple first interference lights and the second interference lights are additively mixed.

[0016] In this solar cell module, either the first color pattern layer or the second color pattern layer contains interference pigments of multiple colors that generate different interference lights, making it possible to achieve a three-dimensional pattern even with a small number of printed layers. Furthermore, in this printed matter, the pattern layer containing the interference pigments that generate multiple interference lights is only one of the first color pattern layer or the second color pattern layer, simplifying color matching and registration work during printing. Therefore, this printed matter makes it possible to achieve a three-dimensional pattern even with a small number of printed layers, and also simplifies color matching and registration work during printing. Furthermore, while achieving these effects, the printed matter ensures sunlight transmission to the solar cell, thereby suppressing a decrease in the power generation efficiency of the solar cell module.

[0017] [2] The solar cell module of [1] above may further include a white pattern layer formed on the second color pattern layer and composed of a plurality of silver dots, each of the plurality of silver dots containing a silver binder and a plurality of silver pigment chips dispersed within the silver binder. In this case, the color development of the first color pattern layer and the second color pattern layer is excellent, and the picture print layer can have a picture that gives a whitish impression.

[0018] [3] The solar cell module of [1] or [2] above may further include a transparent smoke-printed layer provided on the outermost surface of the picture-printed layer on the side opposite the translucent substrate. In this case, the color development of the first color pattern layer and the second color pattern layer is more excellent. Furthermore, because the transparent smoke-printed layer is transparent, a decrease in the power generation efficiency of the solar cell module is effectively suppressed.

[0019] [4] In the solar cell module of any one of [1] to [3] above, each of the first interference pigment and the second interference pigment may contain titanium dioxide-coated mica having a particle size of 25 μm or more and 60 μm or less. When titanium dioxide-coated mica having a particle size of 25 μm or more is contained, the transparency and color development of the picture-printed layer can be improved. When titanium dioxide-coated mica having a particle size of 60 μm or less is contained, a decrease in the resolution and gradation of the picture-printed layer can be suppressed.

[0020] [5] In any of the solar cell modules [1] to [4] above, the content of the plurality of first color pigment chips may be in the range of 0.5 parts by weight or more and 20 parts by weight or less, based on 100 parts by weight of the first color binder, and the content of the plurality of second color pigment chips may be in the range of 0.5 parts by weight or more and 20 parts by weight or less, based on 100 parts by weight of the second color binder. When the content of the plurality of first color pigment chips is in the range of 0.5 parts by weight or more, the design of the first color pattern layer is well expressed. When the content of the plurality of first color pigment chips is in the range of 20 parts by weight or less, the deterioration of the film-forming properties and transparency of the first color pattern layer can be suppressed. Similarly, when the content of the plurality of second color pigment chips is in the range of 0.5 parts by weight or more and 20 parts by weight or less, based on 100 parts by weight of the second color binder, the design of the second color pattern layer is well expressed, while the deterioration of the film-forming properties and transparency of the second color pattern layer can be suppressed.

[0021] According to the present disclosure, it is possible to provide a solar cell module that can express a three-dimensional image even with a small number of printed layers, that includes printed matter that can simplify color matching and registration work during printing, and that can suppress a decrease in power generation efficiency.

[0022] Specific examples of solar cell modules according to embodiments of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. In the following description, identical elements in the drawings will be designated by the same reference numerals, and duplicate descriptions will be omitted.

[0023] [Embodiment 1-1] Generally, the surfaces of the solar cells embedded in a solar cell module are simply black or dark blue, and therefore attempts have been made to color the exterior of the solar cell module in various ways in order to improve its design. In this embodiment, a printed matter is applied to the surface of the solar cell module in a manner that makes it possible to improve the design of the exterior of the solar cell module while keeping the reduction in power generation of the solar cell to a very low level.

[0024] Fig. 1 is a cross-sectional view schematically showing a solar cell module according to embodiment 1-1. Fig. 2 is a cross-sectional view schematically showing a printed matter provided on the solar cell module shown in Fig. 1. Fig. 3 is a cross-sectional view schematically showing a picture print layer provided on the printed matter shown in Fig. 2.

[0025] As shown in Figure 1, thin solar cells SC are placed on a backing material 100 with their light-receiving surfaces facing upward and embedded in a sealing material layer 111. A surface plate 112 is laminated and adhered to the light-receiving surface side of the solar cells SC in order to protect the solar cells SC. A printed matter 2 is laminated on the surface plate 112 in order to color the solar cell module 1. A hard coat layer (also called a clear layer) 116 is laminated on the printed matter 2.

[0026] The solar cell SC may be a photoelectric conversion element formed in a thin plate shape with a thickness of about 0.2 mm and made of crystalline or amorphous silicon, thin film silicon, perovskite, chalcopyrite, III-V group silicon, CdTe, CIS, etc., which generates electricity by absorbing light with wavelengths mainly in the visible light region. The encapsulant layer 111 may be made of a transparent material such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), polyolefin resin, ionomer resin, or silicone resin, and may be formed in a layer with a thickness of about 1 mm so as to surround the solar cell SC as shown in the figure.

[0027] The backing material 100 may be a layer, film, or plate made of PET (polyethylene terephthalate), polycarbonate resin, acrylic resin, glass, or metal (aluminum, etc.). The face plate 112 may be a plate-like member made of a transparent material such as polycarbonate resin, acrylic resin, or glass and having a thickness of about 3 mm. The face plate 112 and the sealant layer 111, and the backing material 100 and the sealant layer 111 may be bonded together by the adhesive strength of the sealant layer 111.

[0028] The hard coat layer 116 may be laminated for the purpose of protecting the decorative layer, and may be similar to that applied to the painted surface of a vehicle, etc. The thickness of the hard coat layer 116 may be 5 to 50 μm, preferably 10 to 40 μm, and more preferably 15 to 30 μm. As the material for the hard coat layer 116, an active energy ray-curable coating composition that is cured by ultraviolet irradiation, electron beams, or the like, or a heat-curable coating composition, etc. may be used.

[0029] As shown in FIG. 2 , the printed matter 2 is a sheet for expressing a pattern, and includes a light-transmitting substrate 4 , a pattern printed layer 5 , and a transparent smoke printed layer 30 .

[0030] The light-transmitting substrate 4 is a substrate that is transparent to visible light. The light-transmitting substrate 4 is made of, for example, a transparent resin. Examples of transparent resins include PET, PMMA, polyethylene, polypropylene, nylon, and fluorine. The light-transmitting substrate 4 may be a glass substrate. The thickness of the light-transmitting substrate 4 is, for example, 25 μm to 250 μm. In the case of a glass substrate, the thickness is, for example, several mm to 10 mm. If necessary, a surface protection layer may be provided on the surface side of the light-transmitting substrate 4 (the side opposite to the picture printed layer 5).

[0031] The picture printed layer 5 is a layer that expresses the picture of the printed matter 2. The picture printed layer 5 includes a first color pattern layer 10 provided on one surface 4 a of the light-transmitting substrate 4, and a second color pattern layer 20 provided on the first color pattern layer 10.

[0032] The first color pattern layer 10 can be formed on the surface 4a by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 3 , the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, "dot" refers to a point that is an element constituting a printed image, and its shape is not limited to a circle and may be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 includes a first color binder 12 and a plurality of first color pigment chips 13 dispersed within the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the first color binder 12 is 100 parts by weight.

[0033] Examples of the first color binder 12 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, and fluorine resins. The thickness of the first color pattern layer 10 is, for example, 1 μm to 10 μm. The first color pattern layer 10 may contain a curing agent. In this case, the heat resistance of the first color pattern layer 10 and the adhesion of the first color pattern layer 10 to the light-transmitting substrate 4 can be improved.

[0034] In the first embodiment, the first color pigment chips 13 are first interference pigments 14a, 14b of multiple colors that generate different interference light from each other. Each of the first interference pigments 14a, 14b is composed of a thin flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the thin flake. Light incident on the first color pattern layer 10 from the translucent substrate 4 side and reflected on the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. Adjusting the film thickness and refractive index of the metal oxide film allows generation of interference light having a desired wavelength.

[0035] In embodiment 1-1, each of the first interference pigments 14a, 14b is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm or more and 60 μm or less. Here, "particle size" refers to the longest diameter of the particle cross section. The flakes that make up the first interference pigments 14a, 14b may be made of a material other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide films that make up the first interference pigments 14a, 14b may be made of a material other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0036] When incident light E enters the first color pattern layer 10, the first interference pigments 14a, 14b generate first interference lights 15a, 15b that are different from each other. That is, the wavelengths of the first interference lights 15a, 15b are different from each other. As a result, the first interference pigments 14a, 14b exhibit a mixed color. The first interference pigments 14a, 14b are, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, the first interference lights 15a, 15b exhibit red and gold, respectively. The blending amounts of the first interference pigments 14a, 14b may be the same or different from each other.

[0037] The second color pattern layer 20 can be formed on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 3 , the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, the term "dot" refers to a point that is an element constituting a printed image, and the shape of the dot is not limited to a circle and may be a rectangle, a polygon, or other shape. Each of the plurality of second color dots 21 includes a second color binder 22 and a plurality of second color pigment chips 23 dispersed within the second color binder 22. The content of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the second color binder 22 is 100 parts by weight.

[0038] Examples of the second color binder 22 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, and fluorine resins. The thickness of the second color pattern layer 20 is, for example, 1 μm to 10 μm. The second color pattern layer 20 may contain a curing agent. In this case, the heat resistance of the second color pattern layer 20 and the adhesion of the second color pattern layer 20 to the first color pattern layer 10 can be improved.

[0039] In the first embodiment, the plurality of second color pigment chips 23 are second interference pigments 24 that generate monochromatic interference light different from the mixed color exhibited by the first interference pigments 14a, 14b. The second interference pigments 24 are composed of flakes (not shown) that are transparent to visible light and a metal oxide film (not shown) that covers the flakes. Light incident on the second color pattern layer 20 from the translucent substrate 4 side and reflected on the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected on the surface of the flakes, generating interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for the generation of interference light having a desired wavelength.

[0040] In embodiment 1-1, the second interference pigment 24 is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm or more and 60 μm or less. Here, "particle size" refers to the longest diameter of the particle cross section. The flakes that make up the second interference pigment 24 may be made of a material other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide film that makes up the second interference pigment 24 may be made of a material other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0041] When incident light E enters the second color pattern layer 20, the second interference pigment 24 generates a monochromatic second interference light 25. As a result, the second interference pigment 24 exhibits a monochromatic color. The second interference pigment 24 may be any interference pigment that generates a monochromatic second interference light 25 different from the mixed color exhibited by the first interference pigments 14a, 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 25 exhibits green color.

[0042] The transparent smoke printed layer 30 has the function of attenuating light from the front side of the viewpoint that passes through the printed matter 2. The transparent smoke printed layer 30 is provided on the outermost surface of the picture printed layer 5, opposite the light-transmitting substrate 4. In the first embodiment, the transparent smoke printed layer 30 is provided on the second color pattern layer 20, as shown in FIG. 2. The transparent smoke printed layer 30 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing using an ink in which a small amount of carbon black is dispersed in a resin binder such as a vinyl, acrylic, urethane, or polyester binder. The thickness of the transparent smoke printed layer 30 is, for example, 1 μm to 10 μm.

[0043] In the printed matter 2, the image is expressed by additively mixing the first interference light 15a, 15b generated by the first interference pigments 14a, 14b and the second interference light 25 generated by the second interference pigment 24.

[0044] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. In particular, it may be 50% or more in order to suppress a decrease in the power generation efficiency of the solar cell module 1. The total light transmittance referred to here means a value measured using a spectrophotometer (for example, the UV-3600 spectrophotometer manufactured by Shimadzu Corporation).

[0045] In the printed matter 2 according to the first embodiment described above, the first color pattern layer 10 contains the first interference pigments 14a and 14b, and the second color pattern layer 20 contains the second interference pigment 24. This allows for a three-dimensional image to be produced even with a small number of printed layers. Furthermore, in the printed matter 2, the first color pattern layer 10 is the only pattern layer containing interference pigments that generate different interference light from each other. This simplifies color matching and registration during printing. Therefore, the printed matter 2 allows for a three-dimensional image to be produced even with a small number of printed layers, and simplifies color matching and registration during printing. Furthermore, while achieving these effects, the printed matter 2 ensures sunlight transmission to the solar cell SC, thereby suppressing a decrease in the power generation efficiency of the solar cell module 1.

[0046] In the 1-1 embodiment, the printed matter 2 of the solar cell module 1 includes a transparent smoke printed layer 30 provided on the second color pattern layer 20. This provides better color development between the first color pattern layer 10 and the second color pattern layer 20. Furthermore, because the transparent smoke printed layer 30 is transparent, a decrease in the power generation efficiency of the solar cell module 1 is effectively suppressed.

[0047] In the first-1 embodiment, each of the first interference pigments 14a, 14b and the second interference pigment 24 contains titanium dioxide-coated mica having a particle size of 25 μm or more and 60 μm or less. When titanium dioxide-coated mica having a particle size of 25 μm or more is contained, the transparency and color development of the picture-printed layer 5 can be improved. When titanium dioxide-coated mica having a particle size of 60 μm or less is contained, a decrease in the resolution and gradation of the picture-printed layer 5 can be suppressed.

[0048] In the first-1 embodiment, the content of the plurality of first color pigment chips 13 is within a range of 0.5 parts by weight or more and 20 parts by weight or less, when the first color binder 12 is taken as 100 parts by weight, and the content of the plurality of second color pigment chips 23 is within a range of 0.5 parts by weight or more and 20 parts by weight or less, when the second color binder is taken as 100 parts by weight. Because the content of the plurality of first color pigment chips 13 is within a range of 0.5 parts by weight or more, the pattern of the first color pattern layer 10 is well expressed. Because the content of the plurality of first color pigment chips 13 is within a range of 20 parts by weight or less, a decrease in the coating properties and transparency of the first color pattern layer 10 can be suppressed. Similarly, since the content of the multiple second color pigment chips 23 is within the range of 0.5 parts by weight to 20 parts by weight when the second color binder 22 is 100 parts by weight, the pattern of the second color pattern layer 20 is well expressed while preventing a decrease in the coating properties and transparency of the second color pattern layer 20.

[0049] In the first embodiment, the total light transmittance of the printed matter 2 is 30% to 70%. If the total light transmittance is 30% or more, when the printed matter 2 is placed in front of the solar cell SC, the picture printed layer 5 becomes less visible due to the light of the image on the screen, and the image becomes more clearly visible. If the total light transmittance is 70% or less, the picture on the picture printed layer 5 can be prevented from appearing dark even when the screen is black.

[0050] For example, "Total light transmittance less than 30%: Visibility of pattern: Good, Power generation efficiency: Bad," "Total light transmittance 30% to less than 70%: Visibility of pattern: Good, Power generation efficiency: Good," and "Total light transmittance 70% or more: Visibility of pattern: Bad, Power generation efficiency: Good." For "Visibility of pattern," if printed material 2 is placed in front of the solar cell and the boundary of the solar cell cannot be seen from a distance of 1 meter, it is marked as "Good," and if it can be seen, it is marked as "Bad." For "Power generation efficiency," if printed material 2 is placed in front of the solar cell and the ratio of the amount of power generated with and without printing is 0.5 or more, it is marked as "Good."

[0051] [1-2 Embodiment] A printed matter 2A according to 1-2 embodiment will be described below with reference to Figures 4 and 5. Note that in the description of 1-2 embodiment, descriptions that overlap with the above 1-1 embodiment will be omitted, and only differences from the above 1-1 embodiment will be described. In other words, to the extent technically possible, the descriptions of the above 1-1 embodiment may be used appropriately in 1-2 embodiment.

[0052] Fig. 4 is a cross-sectional view schematically showing a printed matter according to embodiment 1-2. Fig. 5 is a cross-sectional view schematically showing a white pattern layer provided in the printed matter shown in Fig. 4. The printed matter 2A includes a light-transmitting substrate 4 and a picture print layer 5. The printed matter 2A further includes a white pattern layer 40 provided on the second color pattern layer 20.

[0053] The white pattern layer 40 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 5 , the white pattern layer 40 is composed of a plurality of silver dots 41. Here, "dot" refers to a point that is an element constituting a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of silver dots 41 contains a silver binder 42 and a plurality of silver pigment chips 43 dispersed within the silver binder 42. The content of the plurality of silver pigment chips 43 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the silver binder 42 is 100 parts by weight.

[0054] Examples of the silver binder 42 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the white pattern layer 40 is, for example, 1 μm to 10 μm. The white pattern layer 40 may contain a curing agent. In this case, the heat resistance of the white pattern layer 40 and the adhesion of the white pattern layer 40 to the second color pattern layer 20 can be improved.

[0055] The configuration of the printed matter 2A described above also achieves the same effects as those of the above-described embodiment 1-1. Furthermore, embodiment 1-2 includes a white pattern layer 40 formed on the second color pattern layer 20 and composed of a plurality of silver dots 41, each of which contains a silver binder 42 and a plurality of silver pigment chips 43 dispersed within the silver binder 42. This provides excellent color development for the first color pattern layer 10 and the second color pattern layer 20, and allows the picture printed layer 5 to have a pattern that gives a whitish impression.

[0056] [1-3 Embodiment] A printed matter 2B according to 1-3 embodiment will be described below with reference to Figure 6. Note that in the description of 1-3 embodiment, descriptions that overlap with the above 1-1 and 1-2 embodiments will be omitted, and only differences from the above 1-1 and 1-2 embodiments will be described. In other words, to the extent technically possible, the descriptions of the above 1-1 and 1-2 embodiments may be used as appropriate in 1-3 embodiment.

[0057] 6 is a cross-sectional view schematically showing a printed matter according to Embodiment 1-3. The printed matter 2B includes a light-transmitting substrate 4 and a picture print layer 5. That is, the printed matter 2B does not include a transmissive smoke print layer 30 or a white pattern layer 40. Even with the configuration of the printed matter 2B described above, the same effects as those of Embodiment 1-1 can be achieved.

[0058] [1-4 Embodiment] A printed matter 2C according to 1-4 embodiment will be described below with reference to Figure 7. Note that in the description of 1-4 embodiment, descriptions that overlap with the above 1-1, 1-2, and 1-3 embodiments will be omitted, and only differences from the above 1-1, 1-2, and 1-3 embodiments will be described. In other words, to the extent technically possible, the descriptions of the above 1-1, 1-2, and 1-3 embodiments may be used as appropriate in 1-4 embodiment.

[0059] 7 is a cross-sectional view schematically showing a printed matter according to Embodiments 1-4. The printed matter 2C comprises a light-transmitting substrate 4, a picture print layer 5, a white pattern layer 40, and a transmissive smoke print layer 30. The white pattern layer 40 is provided on the second color pattern layer 20, and the transmissive smoke print layer 30 is provided on the white pattern layer 40. Even with the configuration of the printed matter 2C described above, the same effects as those of the first, second, and third embodiments can be achieved.

[0060] The solar cell module according to the present disclosure is not limited to the above-described embodiments and various modifications are possible. For example, the second color pattern layer may include first interference pigments of multiple colors that generate different first interference lights, and the first color pattern layer may include a second interference pigment that generates a single-color second interference light that is different from the mixed color of the multiple first interference pigments. Furthermore, although the above-described embodiments each include a first interference pigment chip of two colors, the first color pigment chip may also include a first interference pigment chip of three or more colors.

[0061] [Second Disclosure] As in the solar cell module shown in JP 2021-27266 A, printed matter may be combined to impart a design to the solar cell. Instead of or in addition to such printed matter, a method for suppressing the black or dark blue color of the solar cell from appearing on the exterior of the solar cell module has been sought. Furthermore, because solar cell modules generate electricity by receiving sunlight, if the sunlight is excessively blocked by the printed matter, there is a problem that power generation efficiency decreases.

[0062] The present disclosure is intended to solve the above-mentioned problems, and aims to provide a solar cell module that can prevent the appearance of black or dark blue color on the exterior of the solar cell module and can prevent a decrease in power generation efficiency.

[0063] [1] In one aspect, a solar cell module according to the present disclosure includes a solar cell and a vapor deposition layer disposed on a light-receiving surface side of the solar cell and formed by vapor deposition of a metal.

[0064] The solar cell module described above includes a vapor deposition layer disposed on the light-receiving surface side of the solar cell, formed by vapor deposition of metal. The vapor deposition layer has the function of obscuring black or dark blue colors while allowing sunlight necessary for solar power generation to pass through. Therefore, by disposing the vapor deposition layer on the light-receiving surface side of the solar cell, it is possible to prevent the appearance of black or dark blue colors on the exterior of the solar cell module. As a result, it is possible to prevent the appearance of black or dark blue colors on the exterior of the solar cell module and to prevent a decrease in power generation efficiency.

[0065] [2] The solar cell module of [1] above further includes a decorative printed layer disposed on the outer layer side of the vapor deposition layer relative to the light-receiving surface, thereby imparting a design to the solar cell module with the printed layer while suppressing the appearance of a black or dark blue color in the solar cell module's appearance.

[0066] [3] In the solar cell module of [2] above, the printed layer has a first color pattern layer composed of a plurality of first color dots, and a second color pattern layer provided on the first color pattern layer and composed of a plurality of second color dots, each of the plurality of first color dots including a first color binder and a plurality of first color pigment chips dispersed within the first color binder, each of the plurality of second color dots including a second color binder and a plurality of second color pigment chips dispersed within the second color binder, one of the plurality of first color pigment chips and the plurality of second color pigment chips being a first interference pigment of a plurality of colors that respectively generate first interference light beams different from each other, and the other of the plurality of first color pigment chips and the plurality of second color pigment chips being a second interference pigment that generates a single-color second interference light beam different from the mixed color exhibited by the plurality of first interference pigments, and additive color mixing of the plurality of first interference light beams and the second interference light beams is performed. In this case, because either the first color pattern layer or the second color pattern layer contains interference pigments of multiple colors that generate different interference lights, a three-dimensional pattern can be achieved even with a small number of printed layers. Furthermore, in this printed matter, the pattern layer containing the interference pigments that generate multiple interference lights can be only one of the first color pattern layer or the second color pattern layer, which simplifies color matching and registration work during printing. Therefore, this printed matter can produce a three-dimensional pattern even with a small number of printed layers, and can simplify color matching and registration work during printing. Furthermore, while achieving these effects, the printed matter can ensure sunlight transmission to the solar cell, thereby suppressing a decrease in the power generation efficiency of the solar cell module.

[0067] [4] The solar cell module of any of [1] to [3] above may have a film layer as the outermost layer on the light-receiving surface. In this case, the surface of the solar cell module can be protected by the film layer. Furthermore, by using the film layer as the outermost layer, the deposition surface can be protected. Furthermore, if a printed layer is provided, it has the advantage of protecting the printed layer, which is made of color pigment chips and has gaps and is therefore fragile.

[0068] [5] The solar cell module of any one of [1] to [3] above may have a top coat layer as the outermost layer on the light-receiving surface. In this case, the surface of the solar cell module can be protected by the top coat layer. Furthermore, by using the top coat layer as the outermost layer, it is possible to obtain the advantages of easy gloss adjustment and reduced scratch resistance during installation.

[0069] [6] The solar cell module of any one of [1] to [3] above may have a glass layer as the outermost layer on the light-receiving surface. In this case, the surface of the solar cell module can be protected by the glass layer. Furthermore, by using the glass layer as the outermost layer, it is possible to obtain the advantage of delaying deterioration due to excellent gas barrier properties.

[0070] [7] In the solar cell module of any one of [1] to [6] above, the total light transmittance of the vapor deposition layer may be 25% to 75%. In this case, the appearance of the solar cell module can be prevented from becoming black or dark blue. At the same time, excessive reduction in the power generation efficiency of the solar cell can be prevented.

[0071] According to the present disclosure, it is possible to provide a solar cell module that can prevent the appearance of black or dark blue color in the exterior of the solar cell module and can also prevent a decrease in power generation efficiency.

[0072] Specific examples of solar cell modules according to embodiments of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. In the following description, identical elements in the drawings will be designated by the same reference numerals, and duplicate descriptions will be omitted.

[0073] [Embodiment 2-1] Generally, the surfaces of the solar cells embedded in a solar cell module are simply black or dark blue, and therefore attempts have been made to color the exterior of the solar cell module in various ways in order to improve its design. In this embodiment, a printed matter is applied to the surface of the solar cell module in a manner that makes it possible to improve the design of the exterior of the solar cell module while keeping the reduction in power generation of the solar cell to a very low level.

[0074] Fig. 8 is a cross-sectional view schematically showing a solar cell module according to embodiment 2-1. As shown in Fig. 8, the solar cell module 1 includes a backing material 100, a sealing material layer 111, solar cells SC, and a surface layer 120. The surface layer 120 includes a film layer 101, a vapor deposition layer 102, and an adhesive layer 103. Thin solar cells SC are placed on the backing material 100 with their light-receiving surfaces facing upward and embedded in the sealing material layer 111. The surface layer 120 is formed on the light-receiving surface side of the solar cells SC.

[0075] The solar cell SC may be a photoelectric conversion element formed in a thin plate shape with a thickness of about 0.2 mm and made of crystalline or amorphous silicon, thin film silicon, perovskite, chalcopyrite, III-V group silicon, CdTe, CIS, etc., which generates electricity by absorbing light with wavelengths mainly in the visible light region. The encapsulant layer 111 may be made of a transparent material such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), polyolefin resin, ionomer resin, or silicone resin, and may be formed in a layer with a thickness of about 1 mm so as to surround the solar cell SC as shown in the figure.

[0076] The backing material 100 may be a layer, film, or plate made of PET (polyethylene terephthalate), polycarbonate resin, acrylic resin, glass, or metal (aluminum, etc.). The backing material 100 and the sealing material layer 111 may be bonded together by the adhesive strength of the sealing material layer 111.

[0077] The vapor-deposited layer 102 is disposed on the light-receiving surface of the solar cell SC and is formed by vapor deposition of a metal. The vapor-deposited layer 102 allows sunlight to pass through the solar cell SC while concealing the black or dark blue color of the solar cell SC. The metal used for the vapor-deposited layer 102 may be aluminum, indium, tin, or other metals such as zinc, chromium, nickel, gold, or silver. Aluminum is advantageously inexpensive. Indium is advantageously durable. Tin is advantageously non-conductive. The vapor-deposited layer 102 may be a film formed by vapor deposition. Alternatively, the vapor-deposited layer 102 may be formed by sputtering or the like on another component (here, the film layer 101) in the surface layer 120. The thickness of the vapor-deposited layer 102 may be 10 to 100 nm, preferably 15 to 60 nm, and more preferably 20 to 50 nm.

[0078] In this embodiment, the film layer 101 is disposed as the outermost layer of the solar cell SC. The film layer 101 is disposed on the outer principal surface of the vapor deposition layer 102. The film layer 101 has the function of protecting other members of the surface layer 120 (here, the vapor deposition layer 102). Materials that may be used for the film layer 101 include, for example, acrylic resin, fluororesin, polypropylene resin, and polyester resin. The thickness of the film layer 101 may be 30 to 200 μm, preferably 40 to 180 μm, and more preferably 50 to 150 μm.

[0079] The adhesive layer 103 is disposed between the main surface of the encapsulant layer 111 and the vapor deposition layer 102. The adhesive layer 103 is a layer for adhering the vapor deposition layer 102 to the main surface of the encapsulant layer 111. Examples of materials that may be used for the film layer 101 include silicone resin, acrylic resin, and epoxy resin. The thickness of the adhesive layer 103 may be 30 to 300 μm, preferably 40 to 200 μm, and more preferably 50 to 150 μm.

[0080] Here, the total light transmittance will be described. The total light transmittance of the vapor-deposited layer 102 may be 25% to 75%. In particular, to suppress a decrease in the power generation efficiency of the solar cell module 1, the total light transmittance of the vapor-deposited layer 102 may be 25% or more. Furthermore, to suppress a black or dark blue color appearing in the exterior of the solar cell module 1, the total light transmittance of the vapor-deposited layer 102 may be 75% or less. The total light transmittance referred to here means a value measured using a spectrophotometer (for example, a UV-3600 spectrophotometer manufactured by Shimadzu Corporation).

[0081] Next, the functions and effects of the solar cell module 1 according to this embodiment will be described.

[0082] The solar cell module 1 according to this embodiment includes a vapor deposition layer 102 formed by metal vapor deposition on the light-receiving surface side of the solar cells SC. The vapor deposition layer 102 allows sunlight necessary for solar power generation to pass through while obscuring the black or dark blue color of the solar cells SC. Therefore, by disposing the vapor deposition layer 102 on the light-receiving surface side of the solar cells SC, it is possible to prevent the appearance of black or dark blue on the exterior of the solar cell module 1. As described above, it is possible to prevent the appearance of black or dark blue on the exterior of the solar cell module 1 and to prevent a decrease in power generation efficiency.

[0083] The solar cell module 1 may be provided with a film layer 101 as the outermost layer on the light-receiving surface. In this case, the surface of the solar cell module 1 can be protected by the film layer 101. Furthermore, by using the film layer 101 as the outermost layer, the deposition surface can be protected. Note that when the printed layer 202 described below is provided, it has the advantage of protecting the printed layer 202, which is made of color pigment chips and has gaps and is therefore fragile.

[0084] In the solar cell module 1, the total light transmittance of the vapor deposition layer 102 may be 25% to 75%. In this case, it is possible to prevent the appearance of black or dark blue in the appearance of the solar cell module 1. On the other hand, it is possible to prevent the power generation efficiency of the solar cell SC from decreasing excessively.

[0085] [2-2 Embodiment] Hereinafter, a solar cell module 1 according to 2-2 embodiment will be described with reference to Fig. 9. In the description of 2-2 embodiment, descriptions that overlap with the 2-1 embodiment will be omitted, and only differences from the 2-1 embodiment will be described. In other words, to the extent technically possible, the descriptions of the 2-1 embodiment may be used as appropriate in 2-2 embodiment.

[0086] 9 is a cross-sectional view schematically illustrating the solar cell module 1 according to the second embodiment. As shown in FIG. 9, the solar cell module 1 according to the second embodiment includes a protective layer 104 as an outer layer of the film layer 101.

[0087] A top coat layer 104A may be employed as the protective layer 104. The top coat layer 104A may be, for example, the same as that applied to the painted surface of a vehicle or the like. The thickness of the top coat layer 104A may be 5 to 50 μm, preferably 10 to 40 μm, and more preferably 15 to 30 μm. As a material for the top coat layer 104A, an active energy ray-curable coating composition that is cured by ultraviolet irradiation, electron beams, or the like, or a heat-curable coating composition, etc. may be used.

[0088] In this way, the solar cell module 1 may be provided with the top coat layer 104A as the outermost layer on the light-receiving surface. In this case, the surface of the solar cell module 1 can be protected by the top coat layer 104A. Furthermore, by using the top coat layer 104A as the outermost layer, it is possible to obtain the advantages of facilitating gloss adjustment and reducing scratch resistance during installation. Another advantage is that the film layer 101 can be protected from ultraviolet rays.

[0089] Furthermore, a glass layer 104B may be employed as the protective layer 104. For example, a type of glass such as soda-lime glass or aluminoborosilicate glass is employed as the glass layer 104B, and the thickness of the glass layer 104B may be 2.0 to 5.0 mm, preferably 2.5 to 4.0 mm, and more preferably 2.5 to 3.0 mm.

[0090] The solar cell module 1 may include a glass layer 104B as the outermost layer on the light-receiving surface. In this case, the surface of the solar cell module 1 can be protected by the glass layer 104B. Furthermore, by using the glass layer 104B as the outermost layer, it is possible to obtain the advantage of retarding deterioration due to its excellent gas barrier properties. It is also possible to obtain the advantage of protecting the film layer 101 from scratches.

[0091] [2-3 Embodiment] Hereinafter, a solar cell module 1 according to 2-3 embodiment will be described with reference to Fig. 10. In the description of 2-3 embodiment, descriptions that overlap with the above 2-1 and 2 embodiments will be omitted, and only differences from the above 2-1 and 2 embodiments will be described. In other words, to the extent technically possible, the descriptions of the above 2-1 and 2 embodiments may be used appropriately in 2-3 embodiment.

[0092] 10 is a cross-sectional view schematically illustrating a solar cell module 1 according to embodiment 2-3. As shown in FIG. 10, the solar cell module 1 according to embodiment 2-3 includes a decorated printed layer 202 between a vapor deposition layer 102 and a film layer 101.

[0093] The printed layer 202 has the same configuration as the above-described printed matter 2, 2A, 2B, and 2C. Note that the transmissive smoke printed layer 30 may be omitted from the printed layer 202.

[0094] The total light transmittance of the printed layer 202 is, for example, 50% to 80%. In particular, it may be 60% or more in order to suppress a decrease in the power generation efficiency of the solar cell module 1. The total light transmittance referred to here means a value measured using a spectrophotometer (for example, a spectrophotometer UV-3600 manufactured by Shimadzu Corporation).

[0095] As described above, the solar cell module further includes a decorative printed layer disposed on the outer layer side of the vapor deposition layer relative to the light-receiving surface, thereby providing the solar cell module with a decorative design while suppressing the appearance of black or dark blue in the solar cell module's appearance.

[0096] The total light transmittance of the printed layer 202 is 50% to 80%. If the total light transmittance is 60% or more, when the printed layer 202 is placed in front of the solar cell SC, the picture printed layer 5 becomes difficult to see due to the light of the image on the screen, and the image is more clearly visible. If the total light transmittance is 80% or less, the picture on the picture printed layer 5 can be prevented from appearing dark even when the screen is black.

[0097] The print layer may also be formed using a pigment, such as an inorganic pigment such as titanium oxide, zinc oxide, carbon black, iron / composite oxide, iron oxide, or ultramarine, or an organic pigment such as isoindolinone, disazo, polyazo, diketopyrrolopyrrole, quinacridone, or phthalocyanine.

[0098] [Embodiment 2-4] A solar cell module 1 according to embodiment 2-4 will be described below with reference to Figure 11. Note that in the description of embodiment 2-4, descriptions that overlap with embodiments 2-1 to 2-3 will be omitted, and only differences from embodiments 2-1 to 2-3 will be described. In other words, to the extent technically possible, the descriptions of embodiments 2-1 to 2-3 may be used as appropriate in embodiment 2-4.

[0099] Fig. 11 is a cross-sectional view schematically showing a solar cell module 1 according to embodiment 2-4. As shown in Fig. 11, the solar cell module 1 according to embodiment 2-4 includes, in addition to the components of the solar cell module 1 according to embodiment 2-3, a film layer 101 between the vapor deposition layer 102 and the printed layer 202, and an adhesive layer 103 between the printed layer 202 and the outermost film layer 101. The film layer 101 and the adhesive layer 103 may have the same configuration as the film layer 101 and the adhesive layer 103 according to embodiment 2-1.

[0100] According to this configuration, the film layer 101 is interposed between the vapor deposition layer 102 and the printed layer 202. The printed layer 202 is protected by being sandwiched between the pair of film layers 101. In this case, compared to the structure shown in Fig. 11 described below, there is an advantage that the vapor deposition layer 102 is protected from the solvent contained in the ink when the printed layer 202 is formed.

[0101] [Embodiment 2-5] A solar cell module 1 according to embodiment 2-5 will be described below with reference to Figure 12. Note that in the description of embodiment 2-5, descriptions that overlap with embodiments 2-1 to 2-4 will be omitted, and only differences from embodiments 2-1 to 2-4 will be described. In other words, to the extent technically possible, the descriptions of embodiments 2-1 to 2-4 may be used as appropriate in embodiment 2-5.

[0102] Fig. 12 is a cross-sectional view schematically showing a solar cell module 1 according to embodiment 2-5. As shown in Fig. 12, the solar cell module 1 according to embodiment 2-5 differs from the solar cell module 1 according to embodiment 2-5 in that the stacking order of the vapor deposition layer 102 and the film layer 101 is reversed. As a result, the printed layer 202 and the vapor deposition layer 102 are arranged adjacent to each other.

[0103] According to this configuration, the vapor deposition layer 102 and the printed layer 202 are in contact with each other. The printed layer 202 and the vapor deposition layer 102 are protected by being sandwiched between the pair of film layers 101. In this case, compared to the structure shown in Fig. 11 described above, there is an advantage that the vapor deposition layer 102 and the printed layer 202 are protected from the solvent contained in the adhesive when the adhesive layer 103 is formed.

[0104] [Third Disclosure]

[0105] When installing a solar cell module on a wall, conventional solar cell modules (for example, JP 2021-027266 A) do not have sufficient design, and improvements are desired.

[0106] An object of the present disclosure is to provide a solar cell module with improved design.

[0107] [1] The present disclosure relates, as one aspect, to a solar cell module including at least one solar cell and a printed material having a picture print layer disposed on the light-receiving surface side of the solar cell. The picture print layer includes a first color pattern layer including a plurality of first color dots and a second color pattern layer overlapping the first color pattern layer and including a plurality of second color dots. Each of the first color dots includes a first color binder and a plurality of first color pigment chips dispersed within the first color binder, and each of the second color dots includes a second color binder and a plurality of second color pigment chips dispersed within the second color binder. One of the first color pigment chips and the second color pigment chips is a first interference pigment of multiple colors that generates first interference light that is different from each other, and the other of the first color pigment chips and the second color pigment chips is a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the first interference pigment of multiple colors. At least one of the first interference pigment and the second interference pigment contains a small particle size grade interference pigment having a particle size range of 5 μm to 25 μm and a large particle size grade interference pigment having a particle size range of 25 μm to 40 μm. In the picture printed layer of this solar cell module, the small particle size grade interference pigment is arranged so as to fill gaps between the large particle size grade interference pigments, and a plurality of first interference lights and second interference lights are additively mixed.

[0108] The inventors' research has revealed that when the particle size of the interference pigment contained in the pattern-printed layer is small, the color development is weak, but the pattern does not appear too dark even when placed in front of a black solar cell. On the other hand, when the particle size of the interference pigment contained in the pattern-printed layer is large, the transparency of the printed material increases, but the color development of the pattern can be improved. Therefore, the inventors have conceived a solar cell module having a printed material with excellent color development and a pattern that does not appear too dark by configuring the interference pigment to contain a small particle size grade interference pigment and a large particle size grade interference pigment, and by arranging the small particle size grade interference pigment so that it fills the gaps between the large particle size grade interference pigments. Therefore, a solar cell module with the above configuration can provide a pattern with excellent visibility and color development, thereby improving design. Furthermore, in this solar cell module, the inclusion of a large particle size grade interference pigment prevents a decrease in the transparency of the pattern-printed layer. Therefore, with this solar cell module, the reduction in light transmitted through the solar cell is effectively suppressed, and power generation efficiency can be maintained.

[0109] [2] In the solar cell module of [1] above, the large particle size grade interference pigment may have a particle size range of 25 μm to 60 μm. In this case, the color development of the pattern can be improved.

[0110] [3] In the solar cell module of [1] or [2] above, at least one of the small particle size grade interference pigment and the large particle size grade interference pigment may be an interference pigment containing titanium dioxide-coated mica. In this case, the wavelength of the interference light can be adjusted by adjusting the film thickness and transmittance of the titanium dioxide film. Furthermore, the luminance can be improved by increasing the smoothness of the mica surface.

[0111] [4] In the solar cell module of any one of [1] to [3] above, the printed matter may further include a light-transmitting substrate provided on the first color pattern layer. In this case, the picture-printed layer can be protected without reducing light transmission to the solar cell.

[0112] [5] In the solar cell module of any one of [1] to [4] above, the printed matter may further include a white pattern layer composed of a plurality of silver dots, each of which may include a silver binder and a plurality of silver pigment chips dispersed within the silver binder. A second color pattern layer may be provided on the white pattern layer. In this case, the color development of the first color pattern layer and the second color pattern layer is superior, and the picture print layer may have a picture that gives a whitish impression.

[0113] [6] In the solar cell module of any one of [1] to [5] above, the printed matter may further include a transparent smoke print layer provided between the picture print layer and the solar cell. In this case, the color development of the first color pattern layer and the second color pattern layer is more excellent. Furthermore, because the transparent smoke print layer is transparent, a decrease in light transmitted to the solar cell is effectively suppressed.

[0114] [7] In the solar cell module according to any one of [1] to [6] above, the first color pattern layer and the second color pattern layer may each have a thickness of 10 μm or less. In this case, a decrease in light transmitted through the solar cell is effectively suppressed.

[0115] [8] In the solar cell module of any one of [1] to [7] above, both the first interference pigment and the second interference pigment may comprise a small particle size grade interference pigment having a particle size range of 5 μm to 25 μm and a large particle size grade interference pigment having a particle size range of 25 μm to 40 μm. In this case, the design of the solar cell module can be further improved, and a decrease in light transmission through the solar cell can be effectively suppressed.

[0116] According to the present disclosure, a solar cell module with improved design is provided.

[0117] Specific examples of solar cell modules according to embodiments of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. In the following description, identical elements in the drawings will be designated by the same reference numerals, and duplicate descriptions will be omitted.

[0118] Fig. 13 is a cross-sectional view schematically showing a solar cell module according to one embodiment. As shown in Fig. 13, the solar cell module 1 includes a thin solar cell 302, a backing material 303, an encapsulant layer 304, a surface plate 305, and a printed matter 2. The solar cell module 1 may further include a hard coat layer 307 on the surface side of the printed matter 2.

[0119] The solar cell 302 is a photoelectric conversion element formed in a thin plate shape with a thickness of approximately 0.2 mm and made of crystalline or amorphous silicon, thin-film silicon, perovskite, chalcopyrite, III-V, CdTe, CIS, or the like, that generates electricity by absorbing light with wavelengths mainly in the visible light range. The solar cell 302 is embedded (sealed) in an encapsulant layer 304 so that the light-receiving surface 2a faces the printed matter 2. The light-receiving surface 302a of the solar cell 302 is black or dark blue. Although the example shown in FIG. 13 shows only one solar cell 302, the solar cell module 1 may include multiple solar cell cells 302.

[0120] The backing material 303 is a member formed in the form of a layer, film, or plate from polyethylene terephthalate (PET), polycarbonate resin, acrylic resin, glass, or metal (aluminum, etc.). A sealing material layer 304 is formed on the backing material 303.

[0121] The encapsulant layer 304 is a layer formed from a transparent encapsulant material such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), polyolefin resin, ionomer resin, silicone resin, etc. The encapsulant layer 304 is formed by surrounding and encapsulating the solar cell 302 with the transparent encapsulant material. The thickness of the encapsulant layer 304 is, for example, about 1 mm.

[0122] The face plate 305 is a transparent plate-like member disposed on the encapsulant layer 304 and protects the solar cell 302. The face plate 305 is disposed so as to face the light-receiving surface 2a of the solar cell 302. The face plate 305 is formed from a transparent material such as polycarbonate resin, acrylic resin, or glass. The thickness of the face plate 305 is, for example, approximately 3 mm. The backing material 303 and the face plate 305 may each be fixed to the encapsulant layer 304 by the adhesive strength of the encapsulant material (such as resin) that constitutes the encapsulant layer 304, or may be fixed to the encapsulant layer 304 by individual transparent adhesives.

[0123] The printed matter 2 is a member for adding design to the solar cell module. The printed matter 2 is attached to the front surface side of the face plate 305 with a transparent adhesive or the like. Details of the printed matter 2 will be described later.

[0124] The hard coat layer 307 is a coat layer for protecting the printed matter 2. The thickness of the hard coat layer 307 may be, for example, 5 to 50 μm, preferably 10 to 40 μm, and more preferably 15 to 30 μm. The hard coat layer 307 may be formed from, for example, an active energy ray-curable coating composition that is cured by ultraviolet irradiation or electron beams, or a heat-curable coating composition.

[0125] FIG. 2 shows a cross-sectional view schematically illustrating the printed matter provided in the solar cell module shown in FIG. 13 . FIG. 14 is a cross-sectional view schematically illustrating a picture printed layer provided in the printed matter in the third disclosure. As shown in FIG. 2 , the printed matter 2 is a sheet for expressing a picture, and includes a translucent substrate 4, a picture printed layer 5, and a translucent smoke printed layer 30. The printed matter 2 is provided in front of the solar cell 302. The printed matter 2 is transmissive to all light rays. Therefore, when sunlight enters the solar cell module 1 through the printed matter 2, the solar cell 302 can generate electricity from the sunlight. In addition, the picture expressed by the printed matter 2 can be visually recognized.

[0126] The first color pattern layer 10 can be formed on the surface 4a of the light-transmitting substrate 4 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 14 , the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, the term "dot" refers to a point that is an element constituting a printed image, and its shape is not limited to a circle and may be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 includes a first color binder 12 and a plurality of first color pigment chips 13 dispersed within the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the first color binder 12 is 100 parts by weight.

[0127] Examples of the first color binder 12 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the first color pattern layer 10 is, for example, 1 μm to 10 μm. The first color pattern layer 10 may contain a curing agent. In this case, the heat resistance of the first color pattern layer 10 and the adhesion of the first color pattern layer 10 to the light-transmitting substrate 4 can be improved.

[0128] The multiple first color pigment chips 13 are first interference pigments 14a, 14b of multiple colors that generate different interference light from each other. Each of the first interference pigments 14a, 14b is composed of a thin flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the thin flake. Light incident on the first color pattern layer 10 from the translucent substrate 4 side and reflected from the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected from the surface of the flake, generating interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for the generation of interference light having a desired wavelength.

[0129] Each of the first interference pigments 14a, 14b is, for example, titanium dioxide-coated mica. The flakes constituting the first interference pigments 14a, 14b may be made of a material other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide film constituting the first interference pigments 14a, 14b may be made of a material other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0130] The first interference pigment 14a includes a plurality of first titanium dioxide-coated micas 18a having a small particle size grade with a particle size range of 5 μm to 25 μm and a second titanium dioxide-coated mica 18b having a large particle size grade with a particle size range of 25 μm to 40 μm. The first interference pigment 14b includes a plurality of first titanium dioxide-coated micas 16a having a small particle size grade with a particle size range of 5 μm to 25 μm and a plurality of second titanium dioxide-coated micas 16b having a large particle size grade with a particle size range of 25 μm to 40 μm. The first titanium dioxide-coated micas 18a, 16a have an average particle size (D50) of, for example, about 15 μm, and the second titanium dioxide-coated micas 18b, 16b have an average particle size (D50) of, for example, about 25 μm. As a result, the average particle size of the first titanium dioxide-coated mica 18a, 16a is smaller than the average particle size of the second titanium dioxide-coated mica 18b, 16b. The second titanium dioxide-coated mica 18b, 16b may have a particle size range of 25 μm to 60 μm. In this case, the average particle size (D50) of the second titanium dioxide-coated mica 18b, 16b is, for example, approximately 35 μm. As shown in FIG. 2, each of the multiple first titanium dioxide-coated mica 18a, 16a is arranged so as to fill the gaps between the multiple second titanium dioxide-coated mica 18b, 16b. Here, "particle size" refers to the longest diameter of the particle cross section.

[0131] When incident light L enters the first color pattern layer 10, the first interference pigments 14a, 14b generate first interference lights 17a, 17b that are different from each other. That is, the wavelengths of the first interference lights 17a, 17b are different from each other. As a result, the first interference pigments 14a, 14b exhibit a mixed color. The first interference pigments 14a, 14b may be, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, the first interference lights 17a, 17b exhibit red and gold, respectively. The first interference pigments 14a, 14b may be interference pigments of other colors. The blending amounts of the first interference pigments 14a, 14b may be the same or different from each other.

[0132] The second color pattern layer 20 can be formed on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 14 , the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, the term "dot" refers to a point that constitutes an element of a printed image, and its shape is not limited to a circle and may be a rectangle, a polygon, or other shape. Each of the plurality of second color dots 21 includes a second color binder 22 and a plurality of second color pigment chips 23 dispersed within the second color binder 22. The content of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the second color binder 22 is 100 parts by weight.

[0133] Examples of the second color binder 22 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the second color pattern layer 20 is, for example, 1 μm to 10 μm. The second color pattern layer 20 may contain a curing agent. In this case, the heat resistance of the second color pattern layer 20 and the adhesion of the second color pattern layer 20 to the first color pattern layer 10 can be improved.

[0134] The multiple second color pigment chips 23 are second interference pigments 24 that generate monochromatic interference light different from the mixed color of the first interference pigments 14a, 14b. The second interference pigments 24 are composed of flakes (not shown) that are transparent to visible light and a metal oxide film (not shown) that covers the flakes. Light incident on the second color pattern layer 20 from the translucent substrate 4 side and reflected from the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected from the surface of the flakes, generating interference light. Adjusting the thickness and refractive index of the metal oxide film allows for the generation of interference light with a desired wavelength.

[0135] The second interference pigment 24 is, for example, titanium dioxide-coated mica. The flakes constituting the second interference pigment 24 may be made of a material other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide film constituting the second interference pigment 24 may be made of a material other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0136] The second interference pigment 24 includes a plurality of first titanium dioxide-coated micas 25a of a small particle size grade including a particle size range of 5 μm to 25 μm and a second titanium dioxide-coated mica 25b of a large particle size grade including a particle size range of 25 μm to 40 μm. The first titanium dioxide-coated micas 25a have an average particle size (D50) of, for example, approximately 15 μm, and the second titanium dioxide-coated micas 25b have an average particle size (D50) of, for example, approximately 25 μm. As a result, the average particle size of the first titanium dioxide-coated micas 25a is smaller than the average particle size of the second titanium dioxide-coated micas 25b. The second titanium dioxide-coated micas 25b may have a particle size range of 25 μm to 60 μm. In this case, the average particle size (D50) of the second titanium dioxide-coated micas 25b is, for example, approximately 35 μm. The plurality of first titanium dioxide-coated mica particles 25 a are arranged so as to fill the gaps between the plurality of second titanium dioxide-coated mica particles 25 b. Here, the “particle size” means the longest diameter of the particle cross section.

[0137] When incident light L enters the second color pattern layer 20, the second interference pigment 24 generates a monochromatic second interference light 26. As a result, the second interference pigment 24 exhibits a monochromatic color. The second interference pigment 24 may be any interference pigment that generates a monochromatic second interference light 26 different from the mixed color exhibited by the first interference pigments 14a, 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 26 exhibits green. Note that the second interference pigment 24 may be an interference pigment of a color other than green.

[0138] The transparent smoke printed layer 30 is a layer for attenuating light transmitted through the printed matter 2 to an extent that does not affect solar power generation. The transparent smoke printed layer 30 is provided on the outermost surface of the picture printed layer 5, opposite the light-transmitting substrate 4. In the first embodiment, the transparent smoke printed layer 30 is provided on the second color pattern layer 20 (below in the figure), as shown in FIG. 2. The transparent smoke printed layer 30 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing using an ink in which a small amount of carbon black is dispersed in a resin binder such as a vinyl, acrylic, urethane, or polyester binder. The thickness of the transparent smoke printed layer 30 is, for example, 1 μm to 10 μm.

[0139] In the printed matter 2, the design pattern is expressed by additively mixing the first interference light 17a, 17b generated by the first interference pigments 14a, 14b and the second interference light 26 generated by the second interference pigment 24.

[0140] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. The total light transmittance here refers to a value measured using a spectrophotometer (for example, the UV-2100 spectrophotometer manufactured by Shimadzu Corporation). The light referred to here has a wavelength range of 380 nm to 780 nm.

[0141] In the solar cell module 1 according to the present embodiment described above, in the first color pattern layer 10 of the picture printed layer 5 of the printed matter 2, each of the plurality of first titanium dioxide-coated micas 18a, 16a having a small particle size grade with a particle size range of 5 μm to 25 μm is arranged to fill the gaps between the plurality of second titanium dioxide-coated micas 18b, 16b having a large particle size grade with a particle size range of 25 μm to 40 μm. In the printed matter 2, in the second color pattern layer 20, each of the plurality of first titanium dioxide-coated micas 25a having a small particle size grade with a particle size range of 5 μm to 25 μm is arranged to fill the gaps between the plurality of second titanium dioxide-coated micas 25b having a large particle size grade with a particle size range of 25 μm to 40 μm. This solar cell module 1 can provide a pattern with excellent visibility and color development, thereby improving design. Furthermore, in this solar cell module 1, the first color pattern layer 10 contains large particle size grade second titanium dioxide-coated mica 18b, 16b, and the second color pattern layer 20 contains large particle size grade second titanium dioxide-coated mica 25b, which suppresses a decrease in the transmittance of the picture printed layer 5. Therefore, with the solar cell module 1, a decrease in transmitted light to the solar cell 302 is effectively suppressed, and power generation efficiency can be maintained.

[0142] In the solar cell module 1 according to this embodiment, the large particle size grade second titanium dioxide-coated mica 18b, 16b, 25b may have a particle size ranging from 25 μm to 60 μm. In this case, the color development of the pattern is more excellent. Furthermore, power generation efficiency can be further maintained.

[0143] In the solar cell module 1 according to this embodiment, the first interference pigments 14a, 14b and the second interference pigment 24 are interference pigments containing titanium dioxide-coated mica. Therefore, by adjusting the film thickness and transmittance of the titanium dioxide film, the wavelength of the interference light can be adjusted. Furthermore, by increasing the smoothness of the mica surface, the perceived brightness can be improved.

[0144] In the solar cell module 1 according to this embodiment, the printed matter 2 may include a transparent smoke printed layer 30 provided between the picture printed layer 5 and the solar cell 302. This provides better color development between the first color pattern layer 10 and the second color pattern layer 20, further improving the design. Furthermore, because the transparent smoke printed layer 30 is transparent, a decrease in transmitted light to the solar cell 302 is effectively suppressed.

[0145] While the solar cell module 1 according to the present disclosure has been described above, the solar cell module according to the present disclosure is not limited to the above-described embodiment and various other modifications are possible. Modifications of the printed matter 2 used in the solar cell module 1 will now be described.

[0146] In the third disclosure, the printed matter 2 may also be replaced with the printed matters 2A, 2B, and 2C shown in FIGS. 4, 6, and 7 in the first disclosure.

[0147] Furthermore, the solar cell module according to the present disclosure is not limited to the above-described embodiment and various modified examples, and various further modifications are possible. For example, the second color pattern layer may include first interference pigments that generate first interference light beams that are different from each other, and the first color pattern layer may include second interference pigments that generate second interference light beams that are monochromatic different from the mixed color exhibited by the plurality of first interference pigments in the second color pattern layer.

[0148] Furthermore, in the above-described embodiments, the first interference pigment and the second interference pigment each contain a plurality of first titanium dioxide-coated micas and a plurality of second titanium dioxide-coated micas. However, it is sufficient that at least one of the first interference pigment and the second interference pigment contains a plurality of first titanium dioxide-coated micas and a plurality of second titanium dioxide-coated micas. Furthermore, in the above-described embodiments, the first color pigment chips are first interference pigments of two colors. However, the first color pigment chips may be first interference pigments of three or more colors. Furthermore, first interference pigments of multiple colors may be mixed.

[0149] REFERENCE SIGNS LIST 1... solar cell module, 2, 2A, 2B, 2C... printed matter, 4... light-transmitting substrate, 5... picture printed layer, 10... first color pattern layer, 11... first color dots, 12... first color binder, 13... first color pigment chips, 14a, 14b... first interference pigment, 15a, 15b... first interference light, 18a, 16a, 25a... first titanium dioxide-coated mica, 18b, 16b, 25b... second titanium dioxide-coated mica, 17a, 17b... first interference light, 20... second color pattern layer, 21... second color dots, 22...second color binder, 23...second color pigment chip, 24...second interference pigment, 25...second interference light, 30...transparent smoke printed layer, 40...white pattern layer, 41...silver dots, 42...silver binder, 43...silver pigment chip, 101...film layer, 102...vapor deposition layer, 104A...top coat layer, 104B...glass layer, 202...printed layer, SC, 302...solar cell, 303...back material, 304...sealant layer, 305...surface plate, 307...hard coat layer.

Claims

1. A solar cell module comprising: a solar cell; and a printed matter arranged on the light receiving surface side of the solar cell, the printed matter having a translucent substrate and a picture print layer, the picture print layer comprising: a first color pattern layer provided on one surface of the translucent substrate and composed of a plurality of first color dots; and a second color pattern layer provided on the first color pattern layer and composed of a plurality of second color dots, each of the plurality of first color dots comprising a first color binder and a plurality of first color pigment chips dispersed within the first color binder, each of the plurality of second color dots comprising a second color binder and a plurality of second color pigment chips dispersed within the second color binder, one of the plurality of first color pigment chips and the plurality of second color pigment chips being a first interference pigment of a plurality of colors that each generate a first interference light that is different from each other, The other of the plurality of first color pigment chips and the plurality of second color pigment chips is a second interference pigment that generates a second interference light of a single color different from the mixed color exhibited by the plurality of first interference pigments, and the solar cell module additively mixes the plurality of first interference lights and the second interference light.

2. The solar cell module described in claim 1, further comprising a white pattern layer provided on said second color pattern layer and composed of a plurality of silver dots, each of said plurality of silver dots including a silver binder and a plurality of silver pigment chips dispersed within said silver binder.

3. The solar cell module according to claim 1, further comprising a transmissive smoke printed layer provided on the outermost surface of the picture printed layer on the side opposite to the translucent substrate.

4. The solar cell module according to claim 1, wherein each of the first and second interference pigments contains titanium dioxide-coated mica having a particle size of 25 μm or more and 60 μm or less.

5. The solar cell module described in claim 1, wherein the content of the plurality of first color pigment chips is within the range of 0.5 parts by weight to 20 parts by weight, when the first color binder is 100 parts by weight, and the content of the plurality of second color pigment chips is within the range of 0.5 parts by weight to 20 parts by weight, when the second color binder is 100 parts by weight.

6. A solar cell module comprising: a solar cell; and a deposition layer disposed on a light-receiving surface side of the solar cell and formed by deposition of a metal.

7. The solar cell module according to claim 6, further comprising a decorative printed layer disposed on the outer layer side of the vapor deposition layer with respect to the light receiving surface.

8. The solar cell module described in claim 7, wherein the printing layer has: a first color pattern layer composed of a plurality of first color dots; and a second color pattern layer provided on the first color pattern layer and composed of a plurality of second color dots, each of the plurality of first color dots including a first color binder and a plurality of first color pigment chips dispersed within the first color binder, each of the plurality of second color dots including a second color binder and a plurality of second color pigment chips dispersed within the second color binder, one of the plurality of first color pigment chips and the plurality of second color pigment chips is a first interference pigment of a plurality of colors that respectively generate first interference lights different from each other, and the other of the plurality of first color pigment chips and the plurality of second color pigment chips is a second interference pigment that generates a monochromatic second interference light different from the mixed color exhibited by the plurality of first interference pigments, and the plurality of first interference lights and the second interference lights are additively mixed.

9. The solar cell module according to claim 6, further comprising a film layer as an outermost layer for said light receiving surface.

10. The solar cell module according to claim 6, further comprising a top coat layer as an outermost layer on the light receiving surface.

11. The solar cell module according to claim 6, comprising a glass layer as an outermost layer for said light receiving surface.

12. The solar cell module according to claim 6, wherein the total light transmittance of the deposition layer is 25% to 75%.

13. A solar cell module comprising at least one solar cell; and a printed material having a pattern printed layer, arranged on the light receiving surface side of the solar cell, wherein the pattern printed layer comprises: a first color pattern layer composed of a plurality of first color dots; and a second color pattern layer arranged to overlap the first color pattern layer and composed of a plurality of second color dots, wherein each of the plurality of first color dots comprises a first color binder and a plurality of first color pigment chips dispersed within the first color binder, each of the plurality of second color dots comprises a second color binder and a plurality of second color pigment chips dispersed within the second color binder, wherein one of the plurality of first color pigment chips and the plurality of second color pigment chips is a first interference pigment of a plurality of colors that generates first interference light different from each other, and the other of the plurality of first color pigment chips and the plurality of second color pigment chips is a second interference pigment that generates a single-color second interference light different from the mixed color exhibited by the first interference pigment of the plurality of colors, at least one of the first interference pigment and the second interference pigment includes a small particle size grade interference pigment having a particle size range of 5 μm to 25 μm and a large particle size grade interference pigment having a particle size range of 25 μm to 40 μm, the small particle size grade interference pigment is arranged to fill gaps between the large particle size grade interference pigments, and the solar cell module additively mixes the first interference light and the second interference light.

14. The solar cell module according to claim 13, wherein the large particle size grade interference pigment comprises a particle size range of 25 μm to 60 μm.

15. The solar cell module according to claim 13 or 14, wherein at least one of the small particle size grade interference pigment and the large particle size grade interference pigment is an interference pigment containing titanium dioxide-coated mica.

16. The solar cell module according to claim 13 or 14, wherein the printed matter further comprises a light-transmitting substrate provided on the first color pattern layer.

17. A solar cell module as described in claim 13 or 14, wherein the printed matter further has a white pattern layer composed of a plurality of silver dots, each of the plurality of silver dots including a silver binder and a plurality of silver pigment chips dispersed within the silver binder, and the second color pattern layer is provided on the white pattern layer.

18. The solar cell module according to claim 13 or 14, wherein the printed matter further comprises a transparent smoke printed layer provided between the picture printed layer and the solar cell.

19. The solar cell module according to claim 13 or 14, wherein the first color pattern layer and the second color pattern layer each have a thickness of 10 μm or less.

20. The solar cell module according to claim 13 or 14, wherein both the first interference pigment and the second interference pigment include a small particle size grade interference pigment having a particle size range of 5 μm to 25 μm and a large particle size grade interference pigment having a particle size range of 25 μm to 40 μm.

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