Solar cell module
Patent Information
- Application Number
- JP2023088752
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-05-30
- Publication Date
- 2025-05-20
AI Technical Summary
Existing solar cell modules face challenges in maintaining power generation efficiency when combined with printed materials that can express vivid colors and three-dimensional effects, as these materials can block sunlight and complicate color matching and registration during printing.
A solar cell module design incorporating a transparent base material with a pattern printing layer comprising first and second color pattern layers, each containing interference pigments that generate different interference lights, allowing for three-dimensional image expression with simplified color matching and registration, while minimizing sunlight blockage.
The design achieves a three-dimensional pattern expression with reduced printed layers, simplifies color toning and registration, and maintains high power generation efficiency by ensuring sunlight transparency.
Smart Images
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Abstract
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 carbon-free society by 2050, there is a demand for the widespread use 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 balance of annual primary energy consumption while realizing a comfortable indoor environment. Since people are active inside a building, it is impossible to reduce energy consumption to zero completely, but it is possible to reduce energy consumption to zero on a net basis by reducing energy consumption through energy conservation and generating the amount of energy used through energy generation.
[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 space 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, it was necessary to install solar cell modules on the walls as well as on 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, and the pigment chips contained in each pattern layer are either a red interference pigment, a green interference pigment, or a blue interference pigment. In this printed matter, the number of pattern layers is increased to make the color development more vivid than in conventional printing. The decorative sheet described in Patent Document 2 includes a first pattern layer containing multiple types of interference pigments and exhibiting a first mixed color, and a second pattern layer containing multiple types of interference pigments and exhibiting a second mixed color different from the first mixed color. In this decorative sheet, since each of the first and second pattern layers contains multiple types of interference pigments, there is a risk that color matching and registration work during printing will be complicated. Therefore, these problems may occur when the printed matter described in Patent Documents 1 and 2 is combined with a solar cell module. In addition, since the solar cell module receives sunlight to generate 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 intended to solve the above-mentioned problems, and aims to provide a solar cell module that can express a three-dimensional pattern even with a small number of printed layers, has a 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] One aspect of the present invention relates to a solar cell module including 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-printed layer. In this solar cell module, the picture-printed layer is provided on one surface of the translucent substrate and has a first color pattern layer composed of a plurality of first color dots, and a second color pattern layer is 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 lights that are different from each 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 monochrome 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, so that a three-dimensional pattern expression can be realized 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 either the first color pattern layer or the second color pattern layer, so that color matching and registration 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 printed layers, and color matching and registration work during printing can be simplified. Furthermore, while obtaining these effects, the printed matter can ensure the transmittance of sunlight 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 print layer provided on the outermost surface of the picture print layer on the side opposite to the light-transmitting substrate side. In this case, the color development of the first color pattern layer and the second color pattern layer is more excellent. Furthermore, since the transparent smoke print layer has transparency, the decrease in the power generation efficiency of the solar cell module is effectively suppressed.
[0012] [4] In the solar cell module of any of the above [1] to [3], 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, when the binder for the first color is taken as 100 parts by weight, 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, when the binder for the second color is taken as 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 expressed. When the content of the plurality of first color pigment chips is in the range of 20 parts by weight or less, the coating property and transparency of the first color pattern layer can be suppressed from decreasing. 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, when the binder for the second color is taken as 100 parts by weight, the pattern of the second color pattern layer is well expressed, while the coating property and transparency of the second color pattern layer can be suppressed from decreasing. Effect of the Invention
[0014] According to the present invention, it is possible to provide a solar cell module that can express a three-dimensional pattern even with a small number of printed layers, has a printed matter that can simplify color matching and registration work during printing, and can suppress a decrease in power generation efficiency. [Brief description of the drawings]
[0015] [Figure 1] FIG. 1 is a cross-sectional view illustrating a schematic configuration of a solar cell module according to a first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view that illustrates a printed matter provided on the solar cell module illustrated in FIG. [Diagram 3] FIG. 3 is a cross-sectional view that illustrates a pattern printed layer provided on the printed matter shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view that illustrates a printed matter of a solar cell module according to the second embodiment. [Diagram 5] FIG. 5 is a cross-sectional view that illustrates a white pattern layer included in the printed matter illustrated in FIG. [Figure 6]FIG. 6 is a cross-sectional view that illustrates a printed matter of a solar cell module according to a third embodiment. [Figure 7] FIG. 7 is a cross-sectional view that illustrates a printed matter of a solar cell module according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[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 indicated 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 will be given the same reference numerals, and duplicate 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 in color, 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 decrease in power generation of the solar cell very low.
[0018] Fig. 1 is a cross-sectional view that shows a schematic diagram of a solar cell module according to a first embodiment. Fig. 2 is a cross-sectional view that shows a schematic diagram of a printed matter provided on the solar cell module shown in Fig. 1. Fig. 3 is a cross-sectional view that shows a schematic diagram of a picture print layer provided on the printed matter shown in Fig. 2.
[0019] As shown in Fig. 1, thin plate-shaped solar cells SC are placed on a backing material 100 with their light-receiving surfaces facing upwards and embedded in an encapsulant layer 111. A front 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 front plate 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 of crystalline or amorphous silicon, thin film silicon, perovskite, chalcopyrite, III-V, CdTe, CIS, etc., which generates electricity by absorbing light with wavelengths mainly in the visible light region. The encapsulant layer 111 may be formed in a layer shape with a thickness of about 1 mm, surrounding the solar cell SC, as shown in the figure, using a transparent material such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), polyolefin resin, ionomer resin, silicone resin, etc.
[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 front 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 front 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 the same as 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 of the hard coat layer 116 may be an active energy ray curable coating composition or a heat curable coating composition that is cured by ultraviolet irradiation or electron beam, etc.
[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 printed layer 5, and a translucent smoke printed layer 30.
[0024] The light-transmitting substrate 4 is a substrate having visible light transmissibility. The light-transmitting substrate 4 is made of, for example, a transparent resin. Examples of the transparent resin 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 about 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 print layer 5).
[0025] The picture-printed layer 5 is a layer that expresses a 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 provided 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, the "dot" means a point that is an element that constitutes a printed image, and the 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 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 to 20 parts by weight, assuming that 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 first color pigment chips 13 are first interference pigments 14a and 14b of multiple colors that generate different interference lights. Each of the first interference pigments 14a and 14b is composed of a flake (not shown) having visible light transparency and a metal oxide film (not shown) that covers the flake. The light reflected on the surface of the metal oxide film out of the light incident on the first color pattern layer 10 from the translucent substrate 4 side interferes with the light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. By adjusting the film thickness 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 a 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, the "particle size" means the longest diameter of the particle cross section. The flakes constituting the first interference pigments 14a and 14b may be other than mica, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the first interference pigments 14a and 14b may be other than titanium dioxide, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.
[0030] When the incident light E is incident on the first color pattern layer 10, the first interference pigments 14a and 14b generate first interference lights 15a and 15b that are different from each other. That is, the wavelengths of the first interference lights 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 lights 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 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 that constitutes a printed image, and the 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 inside 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, 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. 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 represented by the first interference pigments 14a and 14b. The second interference pigment 24 is composed of a flake (not shown) having visible light transparency and a metal oxide film (not shown) that covers the flake. The light reflected on the surface of the metal oxide film out of the light incident on the second color pattern layer 20 from the translucent substrate 4 side interferes with the light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. By adjusting the film thickness 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 flakes constituting the second interference pigment 24 may be other than mica, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the second interference pigment 24 may be other than titanium dioxide, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.
[0035] When the incident light E is incident on 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 an 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 a 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 on the opposite side to 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-based, acrylic-based, urethane-based, or polyester-based resin binder. The thickness of the transparent smoke printed layer 30 is, for example, 1 μm to 10 μm.
[0037] In the printed matter 2, a pattern is expressed by additively mixing first interference light 15a, 15b generated by the first interference pigments 14a, 14b and 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 measured 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, 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, so that a three-dimensional pattern can be realized 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 among the first color pattern layer 10 and the second color pattern layer 20 that contains the interference pigments that generate different interference lights, so that color matching and registration work during printing can be simplified. Therefore, according to the printed matter 2, a three-dimensional pattern can be expressed even with a small number of printed layers, and color matching and registration work during printing can be simplified. Furthermore, 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 while obtaining these effects.
[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, since the transparent smoke printed layer 30 has transparency, 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 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.
[0042] In the first embodiment, the content of the first color pigment chips 13 is within a range of 0.5 parts by weight to 20 parts by weight, when the first color binder 12 is 100 parts by weight, and the content of the second color pigment chips 23 is within a range of 0.5 parts by weight to 20 parts by weight, when the second color binder is 100 parts by weight. Since the content of the 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. Since the content of the first color pigment chips 13 is within a range of 20 parts by weight or less, the coating property and transparency of the first color pattern layer 10 can be suppressed from decreasing. Similarly, since the content of the multiple second color pigment chips 23 is within 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, the pattern of the second color pattern layer 20 is well expressed while preventing a decrease in the coatability 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%. 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 difficult to see due to the light of the image on the screen, and the image is seen more clearly. If the total light transmittance is 70% or less, the picture of the picture printed layer 5 can be prevented from appearing dark even if 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," "Total light transmittance 70% or more: visibility of pattern: Bad, power generation efficiency: Good." For "visibility of pattern," if the border of the solar cell cannot be confirmed from 1m away when printed material 2 is placed in front of the solar cell, it is marked as "Good," and if it can be confirmed, it is marked as "Bad." For "power generation efficiency," if the ratio of the amount of power generated when printed material 2 is placed in front of the solar cell to the amount generated when there is no printing is marked as "Good" or more.
[0045] [Second embodiment] In the following, a printed matter 2A according to the second embodiment will be described with reference to Figures 4 and 5. 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, the descriptions of the first embodiment may be used as appropriate in the second embodiment to the extent technically possible.
[0046] Fig. 4 is a cross-sectional view showing a printed matter according to a second embodiment. Fig. 5 is a cross-sectional view 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 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, the "dot" means a point that is an element that constitutes a printed image, and the 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 includes a silver binder 42 and a plurality of silver pigment chips 43 dispersed inside 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, 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. The white pattern layer 40 may contain a hardener. 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 provides the same effects as those of the first embodiment. Furthermore, the second embodiment includes a white pattern layer 40 that is provided on the second color pattern layer 20 and is composed of a plurality of silver dots 41, 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. This allows the color development of the first color pattern layer 10 and the second color pattern layer 20 to be excellent, and the picture printed layer 5 to have a picture that gives a whitish impression.
[0050] [Third embodiment] In the following, a printed matter 2B according to the third embodiment will be described with reference to Fig. 6. 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, the descriptions of the first and second embodiments may be used as appropriate in the third embodiment to the extent technically possible.
[0051] 6 is a cross-sectional view showing a printed matter according to the third embodiment. The printed matter 2B includes a light-transmitting base material 4 and a picture print layer 5. That is, the printed matter 2B does not include a translucent smoke print layer 30 and 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] In the following, a printed matter 2C according to the fourth embodiment will be described with reference to Fig. 7. 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, the descriptions of the first, second, and third embodiments may be used as appropriate in the fourth embodiment to the extent technically possible.
[0053] 7 is a cross-sectional view showing a printed matter according to the fourth embodiment. The printed matter 2C includes 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-mentioned embodiment, and various other modifications are possible. For example, the second color pattern layer may include a first interference pigment 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. In addition, in each of the above-mentioned embodiments, the first color pigment chip is a first interference pigment of two colors, but the first color pigment chip may be a first interference pigment 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 dot, 12...first color binder, 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...second color binder, 23...second color pigment chip, 24...second interference pigment, 25...second interference light, 30...transmissive smoke printed layer, 40...white pattern layer, 41...silver dot, 42...silver binder, 43...silver pigment chip.
Claims
1. A solar cell; A solar cell module including a printed matter having a light-transmitting base material and a picture print layer, the printed matter being disposed on a light-receiving surface side of the solar cell, 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 .