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 Art

[0002] Aiming at realizing a carbon-neutral and decarbonized society by 2050, the spread of ZEB (Net-Zero-Energy Building) that can greatly reduce the energy consumption in buildings is required. ZEB is a building that aims to achieve a zero balance of annual primary energy consumption in the building while realizing a comfortable indoor environment. Since people are active in the building, it is impossible to completely zero the energy consumption. However, it is possible to make the net energy consumption zero by reducing the energy used through energy conservation and generating the amount of energy used through energy generation.

[0003] Examples of energy generation methods that do not use fossil fuels include solar power generation, wind power generation, biomass power generation, etc. Considering the installation location and cost, solar power generation is suitable as an energy generation method in buildings.

[0004] The roof area of the building is occupied by outdoor units such as air conditioners. In order to obtain the power generation amount, it was necessary to install solar cell modules on the wall surface other than the roof.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems 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, and the pigment chips included in each pattern layer are any one of a red interference pigment, a green interference pigment, and a blue interference pigment. In this printed matter, the number of pattern layers is increased in order to make the color development more vivid than conventional printing. The decorative sheet described in Patent Document 2 includes a plurality of types of interference pigments, a first pattern layer exhibiting a first color mixture, and a second pattern layer including a plurality of types of interference pigments and exhibiting a second color mixture different from the first color mixture. In this decorative sheet, since each of the first pattern layer and the second pattern layer includes a plurality of types of interference pigments, there is a possibility that the color adjustment work and the alignment work during printing may become complicated. Therefore, when the printed matters of Cited Documents 1 and 2 are combined with a solar cell module, these problems may occur. In addition, since a solar cell module receives sunlight and generates electricity, there is a problem that if the sunlight is excessively blocked by the printed matter, the power generation efficiency will decrease.

[0007] The present invention is for solving the above-described problems, and provides a printed matter that can express a three-dimensional pattern even with a small number of printing layers, can simplify the color adjustment work and the alignment work during printing, and a solar cell module capable of suppressing a decrease in power generation efficiency.

Means for Solving the Problems

[0008] [1] As one aspect, the present invention relates to a solar cell module including a solar cell, and a printed matter disposed on the light-receiving surface side of the solar cell and having a translucent base material and a pattern printing layer. In this solar cell module, the pattern printing layer is provided on one surface of the translucent base material, 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 plurality of first color dots includes a first color binder and a plurality of first color pigment chips dispersed inside the first color binder, and each of the plurality of second color dots includes a second color binder and a plurality of second color pigment chips dispersed inside the second color binder. Either one of the plurality of first color pigment chips and the plurality of second color pigment chips is a plurality of first interference pigments of a plurality of colors that respectively generate different first interference lights 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 indicated by the plurality of first interference pigments. The plurality of first interference lights and the second interference lights are subjected to additive color mixing.

[0009] In this solar cell module, since any one of the first color pattern layer and the second color pattern layer contains a plurality of interference pigments that generate different interference lights from each other, a three-dimensional pattern expression can be realized even with a small number of printing layers. Further, in this printed matter, the pattern layer containing the interference pigments that generate a plurality of interference lights may be any one of the first color pattern layer and the second color pattern layer, so that the color adjustment work and the alignment work during printing can be simplified. Therefore, according to this printed matter, a three-dimensional pattern can be expressed even with a small number of printing layers, and the color adjustment work and the alignment work during printing can be simplified. Further, while obtaining these effects, the printed matter can suppress a decrease in the power generation efficiency of the solar cell module by ensuring the transmittance of sunlight to the solar cell.

[0010] [2] The solar cell module of [1] above is provided on the second color pattern layer and further includes a white pattern layer composed of a plurality of silver dots, and each of the plurality of silver dots may include a silver binder and a plurality of silver pigment chips dispersed inside the silver binder. In this case, the color-developing properties of the first color pattern layer and the second color pattern layer are excellent, and the pattern printing layer can have a pattern that gives an impression of being whitish.

[0011] [3] The solar cell module of [1] or [2] above may further include a transmissive smoke printing layer provided on the outermost surface on the side opposite to the light-transmissive substrate side with respect to the pattern printing layer. In this case, the color-developing properties of the first color pattern layer and the second color pattern layer are more excellent. Furthermore, since the transmissive smoke printing layer has transmissivity, a decrease in the power generation efficiency of the solar cell module is favorably suppressed.

[0012] [4] In any of the solar cell modules of [1] to [3] above, each of the first interference pigment and the second interference pigment may include 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 included, the transmissivity and color-developing properties of the pattern printing layer can be improved. When titanium dioxide-coated mica having a particle size of 60 μm or less is included, it is possible to suppress a decrease in the resolution and gradation of the pattern printing layer.

[0013] [5] In any of the solar cell modules of [1] to [4] above, when the content of the plurality of first-color pigment chips is based on 100 parts by weight of the first-color binder, it is in the range of 0.5 parts by weight or more and 20 parts by weight or less, 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 when the second-color binder is 100 parts by weight. When the content of the plurality of first-color pigment chips is in the range of 0.5 parts by weight or more, the pattern of the first-color pattern layer is well represented. When the content of the plurality of first-color pigment chips is in the range of 20 parts by weight or less, it is possible to suppress a decrease in the coating property and permeability of the first-color pattern layer. 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 when the second-color binder is 100 parts by weight, while the pattern of the second-color pattern layer is well represented, it is possible to suppress a decrease in the coating property and permeability of the second-color pattern layer.

Effect of the Invention

[0014] According to the present invention, it is possible to provide a solar cell module that can represent a three-dimensional pattern even with a small number of printed layers, can simplify the color adjustment work and alignment work during printing, and can suppress a decrease in power generation efficiency.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0016] Specific examples of the solar cell module according to the embodiment of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to these examples, and 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, the same elements in the description of the drawings are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0017] [First Embodiment] Generally, since the surface of the solar cell embedded in the solar cell module only exhibits black or dark blue, attempts have been made to color the appearance of the solar cell module in various ways for the purpose of improving its design. In this embodiment, a printed matter is applied to the surface of the solar cell module in a manner that can improve the design of the appearance of the solar cell module while keeping the decrease in the power generation amount of the solar cell very low.

[0018] FIG. 1 is a cross-sectional view schematically showing a solar cell module according to the first embodiment. FIG. 2 is a cross-sectional view schematically showing the printed matter included in the solar cell module shown in FIG. 1. FIG. 3 is a cross-sectional view schematically showing the pattern printing layer included in the printed matter shown in FIG. 2.

[0019] As shown in FIG. 1, a thin plate-shaped solar cell SC is placed on a backsheet 100 in a state where it is embedded in a sealing material layer 111 with its light-receiving surface facing upward. A surface plate 112 is laminated and adhered to the light-receiving surface side of the solar cell SC for the purpose of protecting the solar cell SC. A printed matter 2 is laminated on the surface plate 112 for the purpose of coloring 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, such as crystalline or amorphous silicon, thin film silicon, perovskite, chalcopyrite, III-V group, CdTe, CIS, etc., which mainly absorbs light with wavelengths in the visible light region and generates electricity. The sealing material layer 111 may be formed of a transparent material such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), polyolefin resin, ionomer resin, silicon resin, etc., and surrounds the solar cell SC as shown in the figure, and is formed in a layered structure with a thickness of about 1 mm.

[0021] The backsheet 100 may be formed of PET (polyethylene terephthalate), polycarbonate resin, acrylic resin, glass, metal (such as aluminum), etc. in a layered, film-like, or plate-like form. The surface plate 112 may be a plate-like member formed of a transparent material such as polycarbonate resin, acrylic resin, glass, etc. with a thickness of about 3 mm. The surface plate 112 and the sealing material layer 111, and the backsheet 100 and the sealing material layer 111 may be adhered by the adhesive force of the sealing material layer 111.

[0022] The hard coat layer 116 may be laminated for the purpose of protecting the decorative layer, and may be the same as that applied to the painted surface of a vehicle, etc., for example. 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 of the hard coat layer 116, an active energy ray curable coating composition or a thermosetting coating composition that cures by ultraviolet irradiation, electron beam, etc. may be used.

[0023] As shown in Fig. 2, the printed matter 2 is a sheet for expressing a pattern, and includes a light-transmitting base material 4, a pattern printing layer 5, and a transmissive smoke printing layer 30.

[0024] The light-transmitting base material 4 is a base material having visible light transmittance. The light-transmitting base material 4 is, for example, made of a resin having transparency. Examples of the resin having transparency include PET, PMMA, polyethylene, polypropylene, nylon, and fluorine. The light-transmitting base material 4 may be a glass base material. The thickness of the light-transmitting base material 4 is, for example, 25 μm to 250 μm. In the case of a glass base material, it is about several mm to 10 mm, for example. Note that, if necessary, a surface protection layer may be provided on the surface side (the side opposite to the pattern printing layer 5) of the light-transmitting base material 4.

[0025] The pattern printing layer 5 is a layer for expressing the pattern of the printed matter 2. The pattern printing layer 5 includes a first color pattern layer 10 provided on one surface 4a of the light-transmitting base material 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 provided on the surface 4a, for example, by 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, the "dot" means a point that is an element constituting a printed image, and its shape is not limited to a circular shape, and may be a rectangular shape, a polygonal shape, or other shapes. 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 inside 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 or more and 20 parts by weight or less when the first color binder 12 is 100 parts by weight.

[0027] Examples of the binder 12 for the first color include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, fluorine resins, and the like. 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-transmissive substrate 4 can be improved.

[0028] In the first embodiment, the plurality of first color pigment chips 13 are first interference pigments 14a and 14b of a plurality of colors that generate different interference lights from each other. Each of the first interference pigments 14a and 14b is composed of a thin sheet (not shown) having visible light transmissibility and a metal oxide film (not shown) covering the thin sheet. Among the incident lights from the light-transmissive substrate 4 side to the first color pattern layer 10, the light reflected on the surface of the metal oxide film and the light passing through the metal oxide film and reflected on the surface of the thin sheet interfere with each other to generate interference light. By adjusting the film thickness of the metal oxide film and the refractive index of the metal oxide film, interference light having a desired wavelength can be generated.

[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 or more and 60 μm or less. Here, the "particle size" means the longest diameter of the particle cross section. The thin sheet constituting the first interference pigments 14a and 14b may be other than mica, and may be, for example, silica, alumina, glass, or poly silicate. The metal oxide film constituting the first interference pigments 14a and 14b may be other than titanium dioxide, and may be, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0030] From each of the first interference pigments 14a and 14b, when incident light E is incident on the first color pattern layer 10, different first interference lights 15a and 15b are respectively generated. That is, the wavelengths of the first interference lights 15a and 15b are different from each other. Thereby, the first interference pigments 14a and 14b exhibit color mixing. Each of the first interference pigments 14a and 14b is, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, each of the first interference lights 15a and 15b exhibits 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 provided 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 "dot" means a point that is an element constituting a printed image, and its shape is not limited to a circular shape, and may be a rectangular shape, a polygonal shape, or other shapes. 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 inside the second color binder 22. The content rate of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 parts by weight or more and 20 parts by weight or less when 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. Note that a curing agent may be contained in the second color pattern layer 20. 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 plurality of second-color pigment chips 23 are second interference pigments 24 that generate interference light of a single color different from the mixed colors indicated by the first interference pigments 14a and 14b. The second interference pigment 24 is composed of a thin sheet (not shown) having visible light transmissibility and a metal oxide film (not shown) covering the thin sheet. Among the incident light from the light-transmissive substrate 4 side to the second-color pattern layer 20, the light reflected from the surface of the metal oxide film and the light passing through the metal oxide film and reflected from the surface of the thin sheet interfere with each other to generate interference light. By adjusting the film thickness of the metal oxide film and the refractive index of the metal oxide film, interference light having a desired wavelength can be generated.

[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 or more and 60 μm or less. Here, the "particle size" means the longest diameter of the particle cross section. The thin sheet constituting the second interference pigment 24 may be other than mica, and may be, for example, silica, alumina, glass, or poly silicate. The metal oxide film constituting the second interference pigment 24 may be other than titanium dioxide, and may be, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0035] When incident light E is incident on the second-color pattern layer 20 from the second interference pigment 24, single-color second interference light 25 is generated. Thereby, the second interference pigment 24 exhibits a single color. The second interference pigment 24 may be an interference pigment that generates second interference light 25 of a single color different from the mixed colors indicated by the first interference pigments 14a and 14b. For example, it may be a green interference pigment (green pearl pigment). In this case, the second interference light 25 exhibits green.

[0036] The transmissive smoke printing layer 30 has a function of attenuating light from the front side of the viewing point that passes through the printed matter 2. The transmissive smoke printing layer 30 is provided on the outermost surface on the side opposite to the light-transmissive base material 4 with respect to the pattern printing layer 5. In the first embodiment, as shown in FIG. 2, the transmissive smoke printing layer 30 is provided on the second color pattern layer 20. The transmissive smoke printing 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 vinyl-based, acrylic-based, urethane-based, or polyester-based. The thickness of the transmissive smoke printing layer 30 is, for example, 1 μm to 10 μm.

[0037] In the printed matter 2, the pattern is expressed by additive color mixing of the first interference lights 15a and 15b generated by the first interference pigments 14a and 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 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 obtained by measuring the total light transmittance using a spectrophotometer (for example, spectrophotometer UV-3600 manufactured by Shimadzu Corporation).

[0039] In the printed matter 2 according to the first embodiment described above, since the first color pattern layer 10 includes the first interference pigments 14a and 14b and the second color pattern layer 20 includes the second interference pigment 24, a three-dimensional pattern can be expressed with a small number of printed layers. Further, in the printed matter 2, the pattern layer containing the interference pigments that generate different interference lights is only the first color pattern layer 10 among the first color pattern layer 10 and the second color pattern layer 20, so that the color adjustment work and the alignment work at the time of printing can be simplified. Therefore, according to the printed matter 2, a three-dimensional pattern can be expressed with a small number of printed layers, and the color adjustment work and the alignment work at the time of printing can be simplified. Further, while obtaining these effects, the printed matter 2 can suppress a decrease in the power generation efficiency of the solar cell module 1 by ensuring the transmittance of sunlight to the solar cell SC.

[0040] In the first embodiment, the printed matter 2 of the solar cell module 1 includes a transmissive smoke printing layer 30 provided on the second color pattern layer 20. Thereby, the color developability of the first color pattern layer 10 and the second color pattern layer 20 is more excellent. Further, since the transmissive smoke printing layer 30 has transmissivity, a decrease in the power generation efficiency of the solar cell module 1 is favorably suppressed.

[0041] In the first embodiment, each of the first interference pigments 14a and 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 included, the transmittance and the color developability of the pattern printing layer 5 can be improved. When titanium dioxide-coated mica having a particle size of 60 μm or less is included, it is possible to suppress a decrease in the resolution and gradation of the pattern printing layer 5.

[0042] In the first embodiment, the content rate of the plurality of first-color pigment chips 13 is in the range of 0.5 parts by weight or more and 20 parts by weight or less when the binder 12 for the first color is 100 parts by weight, and the content rate of the plurality of second-color pigment chips 23 is in the range of 0.5 parts by weight or more and 20 parts by weight or less when the binder for the second color is 100 parts by weight. Since the content rate of the plurality of first-color pigment chips 13 is in the range of 0.5 parts by weight or more, the pattern of the first-color pattern layer 10 is well represented. Since the content rate of the plurality of first-color pigment chips 13 is in the range of 20 parts by weight or less, it is possible to suppress a decrease in the coating property and permeability of the first-color pattern layer 10. Similarly, since the content rate of the plurality of second-color pigment chips 23 is in the range of 0.5 parts by weight or more and 20 parts by weight or less when the binder 22 for the second color is 100 parts by weight, while the pattern of the second-color pattern layer 20 is well represented, it is possible to suppress a decrease in the coating property and permeability 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%. When the total light transmittance is 30% or more, when the printed matter 2 is placed in front of the solar cell SC, the pattern printing layer 5 becomes difficult to visually recognize due to the light of the image on the screen, and the image is more clearly visible. When the total light transmittance is 70% or less, even if the screen is black, it is possible to suppress the pattern of the pattern printing layer 5 from looking dark.

[0044] For example, it becomes "total light transmittance less than 30%: visibility of pattern: ○, power generation efficiency: ×", "total light transmittance 30% or more and less than 70%: visibility of pattern: ○, power generation efficiency: ○", "total light transmittance 70% or more: visibility of pattern: ×, power generation efficiency: ○". Note that the "visibility of pattern" is set to "○" when the boundary of the solar cell cannot be confirmed at a distance of 1 m when the printed matter 2 is overlaid in front of the solar cell, and "×" when it can be confirmed. The "power generation efficiency" is set to "○" when the ratio of the power generation amount when the printed matter 2 is overlaid in front of the solar cell to the case without printing and the case with printing is 0.5 or more.

[0045] [Second Embodiment] Hereinafter, the printed matter 2A according to the second embodiment will be described with reference to FIGS. 4 and 5. In the description of the second embodiment, the description overlapping with the first embodiment is omitted, and the parts different from the first embodiment are described. That is, within the technically possible range, the description of the first embodiment may be appropriately used in the second embodiment.

[0046] FIG. 4 is a cross-sectional view schematically showing the printed matter according to the second embodiment. FIG. 5 is a cross-sectional view schematically showing the white pattern layer provided in the printed matter shown in FIG. 4. The printed matter 2A includes a translucent substrate 4 and a pattern printing 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 provided on the second color pattern layer 20, for example, by 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, the "dot" means a point that is an element constituting a printed image, and its shape is not limited to a circular shape, and may be a rectangular shape, a polygonal shape, or other shapes. Each of the plurality of silver dots 41 includes a silver binder 42 and a plurality of silver pigment chips 43 dispersed inside the silver binder 42. The content rate of the plurality of silver pigment chips 43 is, for example, in the range of 0.5 parts by weight or more and 20 parts by weight or less when 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. Note that a curing agent may be contained in the white pattern layer 40. 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] Even with the configuration of the printed matter 2A described above, the same operational effects as those of the first embodiment are achieved. Further, in the second embodiment, a white pattern layer 40 provided on the second color pattern layer 20 and composed of a plurality of silver dots 41 is provided, and each of the plurality of silver dots 41 includes a silver binder 42 and a plurality of silver pigment chips 43 dispersed inside the silver binder 42. As a result, the color developability of the first color pattern layer 10 and the second color pattern layer 20 is excellent, and the pattern printing layer 5 can have a pattern that gives an impression of being whitish.

[0050] [Third Embodiment] Hereinafter, with reference to FIG. 6, the printed matter 2B according to the third embodiment will be described. In the description of the third embodiment, descriptions overlapping with those of the first and second embodiments are omitted, and portions different from those of the first and second embodiments are described. That is, within the technically possible range, the descriptions of the first and second embodiments may be appropriately used for the third embodiment.

[0051] FIG. 6 is a cross-sectional view schematically showing a printed matter according to the third embodiment. The printed matter 2B includes a translucent base material 4 and a pattern printing layer 5. That is, the printed matter 2B does not include a transmissive smoke printing layer 30 and a white pattern layer 40. Even with the configuration of the printed matter 2B described above, the same operational effects as those of the first embodiment are achieved.

[0052] [Fourth Embodiment] Hereinafter, with reference to FIG. 7, the printed matter 2C according to the fourth embodiment will be described. In the description of the fourth embodiment, descriptions overlapping with those of the first, second, and third embodiments are omitted, and portions different from those of the first, second, and third embodiments are described. That is, within the technically possible range, the descriptions of the first, second, and third embodiments may be appropriately used for the fourth embodiment.

[0053] FIG. 7 is a cross-sectional view schematically showing a printed matter according to the fourth embodiment. The printed matter 2C includes a translucent substrate 4, a pattern printing layer 5, a white pattern layer 40, and a transmissive smoke printing layer 30. The white pattern layer 40 is provided on the second color pattern layer 20, and the transmissive smoke printing layer 30 is provided on the white pattern layer 40. Even with the configuration of the printed matter 2C described above, the same operational effects as those of the first, second, and third embodiments are 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 a plurality of colors of first interference pigments 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 different from the mixed color indicated by the plurality of first interference pigments. Also, in each of the above embodiments, the first color pigment chip was a two-color first interference pigment, but the first color pigment chip may be a three-color or more first interference pigment.

Explanation of Reference Numerals

[0055] 1... solar cell module, 2, 2A, 2B, 2C... printed matter, 4... translucent substrate, 5... pattern printing layer, 10... first color pattern layer, 11... first color dot, 12... binder for first color, 13... first color pigment chip, 14a, 14b... first interference pigment, 15a, 15b... first interference light, 20... second color pattern layer, 21... second color dot, 22... binder for second color, 23... second color pigment chip, 24... second interference pigment, 25... second interference light, 30... transmissive smoke printing layer, 40... white pattern layer, 41... silver dot, 42... binder for silver, 43... silver pigment chip.

Claims

1. A solar cell; A printed matter is disposed on the light receiving surface side of the solar cell and has a light-transmitting base material and a picture print layer; A solar cell module comprising: a transparent smoke print layer provided on the outermost surface of the picture print layer on the opposite side of the light-transmitting substrate; The pattern printed layer is a first color pattern layer provided on one surface of the light-transmitting base material and configured by a plurality of first color dots; a second color pattern layer provided on the first color pattern layer and configured by 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; 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; 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 light 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 represented by the plurality of first interference pigments; A solar cell module that additively mixes the plurality of first interference lights and the second interference light.

2. A white pattern layer is provided on the second color pattern layer and is composed of a plurality of silver dots. Each of the plurality of silver dots includes a silver binder and a plurality of silver pigment chips dispersed within the silver binder. The solar cell module according to claim 1 .

3. 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 .

4. a content of the plurality of first color pigment chips is within a 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; The content of the plurality of second color pigment chips is within a 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 solar cell module according to claim 1 .

Images