solar cell module

Abstract

To provide a solar cell module which can express a pattern with a three-dimensional effect even if the number of print layers is small, and comprises a print material having a designability which enables a simplification of a color matching operation at a print and a registration work and an excellent power generation efficiency.SOLUTION: A print material 2 comprises: a first color pattern layer 10 constructed by a plurality of first color dots 11; and a second color pattern layer 20 that is constructed by a plurality of second color dots 21. Each first color dot 11 contains: a first color binder 12; and a plurality of first color pigment chips 13 that is scattered into a binder inner part. Each second color dot 21 contains: a second color binder 22; and a plurality of second color pigment chips 23 that is scattered into an inner part of the binder. The plurality of first color pigment chips 13 are a plurality of colors of first interference pigment chips 14a and 14b that generate first interference lights 15a and 15b that are different each other. The plurality of second color pigment chips 23 are second interference pigment chips 24 that generate a second interference light 25 of a single color that is different from a mix color indicated by each of the first interference pigment chips 14a and 14b.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a solar cell module. [Background technology]

[0002] With the aim of achieving carbon neutrality and a decarbonized society by 2050, 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 realizing a comfortable indoor environment. Since people are active inside a building, it is impossible to completely reduce energy consumption to zero. However, by reducing energy consumption through energy conservation and generating the equivalent energy through energy generation, it is possible to achieve net zero energy consumption.

[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. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5725581 [Patent Document 2] Patent No. 6839319 Summary of the Invention [Problem to be solved by the invention]

[0006] The printed matter described in Patent Document 1 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 Patent Document 2 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 Patent Documents 1 and 2 with a solar cell module may result in these problems. Furthermore, because solar cell modules generate electricity by receiving sunlight, excessive blocking of sunlight by the printed matter can result in reduced power generation efficiency.

[0007] The present invention 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. [Means for solving the problem]

[0008] [1] In one aspect, the present invention 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-printed layer. In this solar cell module, the picture-printed layer is provided on one surface of the translucent substrate and includes 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. 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] 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 expression 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 expression 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.

[0010] [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 which may contain 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 pattern printed layer may have a pattern that gives a whitish impression.

[0011] [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.

[0012] [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.

[0013] [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 to 20 parts by weight, 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 to 20 parts by weight, 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 to 20 parts by weight, 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. [Effects of the Invention]

[0014] According to the present invention, a solar cell module can be provided that can express a three-dimensional image even with a small number of printed layers, that has printed matter that can simplify color matching and registration work during printing, and that can suppress a decrease in power generation efficiency. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a cross-sectional view schematically showing a solar cell module according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view schematically showing a printed matter provided on the solar cell module shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view schematically showing a picture print layer provided on the printed matter shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view schematically showing a printed matter of a solar cell module according to the second embodiment. [Figure 5] FIG. 5 is a cross-sectional view schematically showing a white pattern layer included in the printed matter shown in FIG. [Figure 6]FIG. 6 is a cross-sectional view schematically showing a printed matter of a solar cell module according to a third embodiment. [Figure 7] FIG. 7 is a cross-sectional view schematically showing a printed matter of a solar cell module according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Specific examples of solar cell modules according to embodiments of the present invention will be described below with reference to the drawings. Note that the present invention 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 duplicated descriptions will be omitted.

[0017] [First embodiment] Generally, the surfaces of the solar cells embedded in a solar cell module are only 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 material 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.

[0018] Fig. 1 is a cross-sectional view schematically showing a solar cell module according to a first embodiment. 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.

[0019] 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 an encapsulant layer 111. A faceplate 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 faceplate 112 in order to color the solar cell module 1. A hard coat layer (also referred to as a clear layer) 116 is laminated on the printed matter 2.

[0020] The solar cell SC may be a photoelectric conversion element formed in a thin plate shape with a thickness of about 0.2 mm from 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 range. The encapsulant layer 111 may be formed in a layer shape with a thickness of about 1 mm, surrounded by the solar cell SC, using a transparent material such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), polyolefin resin, ionomer resin, or silicone resin, as shown in the figure.

[0021] 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.

[0022] 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. The material for the hard coat layer 116 may be an active energy ray-curable coating composition that is cured by ultraviolet irradiation or electron beams, or a thermosetting coating composition.

[0023] 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.

[0024] 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 light-transmitting substrate 4 has a thickness of, 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).

[0025] 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 4a of the light-transmitting substrate 4, and a second color pattern layer 20 provided on the first color pattern layer 10.

[0026] 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 but may be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 contains 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.

[0027] 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.

[0028] In the first embodiment, the multiple first color pigment chips 13 are multiple color first interference pigments 14a, 14b 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 is reflected by the surface of the metal oxide film, and light that passes through the metal oxide film and is reflected by the surface of the flake interferes with each other to generate interference light. Adjusting the thickness and refractive index of the metal oxide film allows generation of interference light having a desired wavelength.

[0029] In the first embodiment, each of the first interference pigments 14a and 14b is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm to 60 μm. Here, "particle size" refers to the longest diameter of the particle cross section. The flakes that make up the first interference pigments 14a and 14b may be made of materials other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide films that make up the first interference pigments 14a and 14b may be made of materials other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0030] When incident light E enters the first color pattern layer 10, the first interference pigments 14a and 14b generate first interference light beams 15a and 15b, which are different from each other. That is, the wavelengths of the first interference light beams 15a and 15b are different from each other. As a result, the first interference pigments 14a and 14b exhibit a mixed color. The first interference pigments 14a and 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 light beams 15a and 15b exhibit red and gold, respectively. The blending amounts of the first interference pigments 14a and 14b may be the same or different from each other.

[0031] 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, "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 second color dots 21 contains 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.

[0032] 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.

[0033] In the first embodiment, the multiple 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 and 14b. The second interference pigment 24 is 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 is reflected by the surface of the metal oxide film, and light that passes through the metal oxide film and is reflected by the surface of the flakes interferes with each other to generate interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for the generation of interference light with a desired wavelength.

[0034] In the first embodiment, 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 to 60 μm. 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.

[0035] 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 and 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 25 exhibits green color.

[0036] 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 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.

[0037] 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.

[0038] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. In particular, it may be 50% or more to prevent 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).

[0039] 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 cells SC, thereby suppressing a decrease in the power generation efficiency of the solar cell module 1.

[0040] In the first 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.

[0041] In the first embodiment, each of the first interference pigments 14a, 14b and the second interference pigment 24 contains titanium dioxide-coated mica with a particle size of 25 μm or more and 60 μm or less. When titanium dioxide-coated mica with 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 with 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.

[0042] In the first 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, where 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, where 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, deterioration 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.

[0043] 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 from 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 does not appear dark even when the screen is black.

[0044] 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."

[0045] [Second embodiment] A printed matter 2A according to the second embodiment will be described below with reference to Figures 4 and 5. Note that in the description of the second embodiment, descriptions that overlap with the first embodiment will be omitted, and only differences from the first embodiment will be described. In other words, to the extent technically possible, the descriptions of the first embodiment may be used as appropriate in the second embodiment.

[0046] Fig. 4 is a cross-sectional view schematically showing a printed matter according to a second embodiment. 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 printed layer 5. The printed matter 2A further includes a white pattern layer 40 provided on the second color pattern layer 20.

[0047] The white pattern layer 40 can be formed 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.

[0048] 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.

[0049] The configuration of the printed matter 2A described above also achieves the same effects as the first embodiment. Furthermore, the second embodiment 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.

[0050] [Third embodiment] A printed matter 2B according to the third embodiment will be described below with reference to Figure 6. Note that in the description of the third embodiment, descriptions that overlap with the first and second embodiments will be omitted, and only differences from the first and second embodiments will be described. In other words, to the extent technically possible, descriptions from the first and second embodiments may be used as appropriate in the third embodiment.

[0051] 6 is a cross-sectional view schematically showing a printed matter according to the third embodiment. The printed matter 2B comprises a light-transmitting substrate 4 and a picture print layer 5. That is, the printed matter 2B does not comprise a translucent 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 the first embodiment can be achieved.

[0052] [Fourth embodiment] A printed matter 2C according to the fourth embodiment will be described below with reference to Figure 7. Note that in the description of the fourth embodiment, descriptions that overlap with the first, second, and third embodiments will be omitted, and only differences from the first, second, and third embodiments will be described. In other words, to the extent technically possible, descriptions of the first, second, and third embodiments may be used as appropriate in the fourth embodiment.

[0053] 7 is a cross-sectional view schematically showing a printed matter according to the fourth embodiment. 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.

[0054] The solar cell module according to the present invention is not limited to the above-described embodiments, and various other 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 exhibited by the multiple first interference pigments. Furthermore, in each of the above embodiments, the first color pigment chips are first interference pigments of two colors, but the first color pigment chips may be first interference pigments of three or more colors. [Explanation of symbols]

[0055] 1...solar cell module, 2, 2A, 2B, 2C...printed matter, 4...translucent 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, 20...second color pattern layer, 21...second color dots, 22...second color binder, 23...second color pigment chips, 24...second interference pigment, 25...second interference light, 30...transmissive smoke printed layer, 40...white pattern layer, 41...silver dots, 42...silver binder, 43...silver pigment chips.

Claims

1. A solar cell; A solar cell module including a printed matter disposed on a light-receiving surface side of the solar cell, the printed matter having a light-transmitting base material and a picture print layer, The picture printed layer is a first color pattern layer provided on one surface of the light-transmitting substrate and configured with a plurality of first color dots; a second color pattern layer provided on the first color pattern layer and configured with a plurality of second color dots; a white pattern layer formed on the second color pattern layer and composed of a plurality of silver dots; each of the plurality of first color dots includes 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 includes a second color binder and a plurality of second color pigment chips dispersed within the second color binder; Each of the plurality of silver dots includes a silver binder and a plurality of silver pigment chips dispersed within the silver binder; one of the plurality of first color pigment chips and the plurality of second color pigment chips is a first interference pigment that generates a first interference light; 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 second interference light of a monochromatic color different from the monochromatic color exhibited by the first interference pigment; A solar cell module that performs additive color mixing of the first interference light and the second interference light.

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

3. a content of the plurality of first color pigment chips in a range of 0.5 parts by weight to 20 parts by weight, where the content of the first color binder is 100 parts by weight; 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, when the content of the second color binder is 100 parts by weight; The solar cell module according to claim 1 .

Images