Translucent member, solar cell module, and method for producing translucent member

Abstract

To suppress reduction in strength of a translucent member including chemically strengthened glass while keeping down manufacturing costs. A translucent member (1) according to one embodiment of the present invention is provided with: a first translucent member (11); a second translucent member (12) disposed so as to face the first translucent member; and an intermediate adhesive film (13) disposed between the first translucent member (11) and the second translucent member (12). The first translucent member (11) is a chemically strengthened glass. The side surfaces of the first translucent member (11) and the second translucent member (12) are configured so as to be covered by the intermediate adhesive film (13).

Description

Light-transmitting member, solar cell module, and method for manufacturing light-transmitting member

[0001] The present invention relates to a light-transmitting member, a solar cell module, and a method for manufacturing a light-transmitting member.

[0002] In recent years, laminated glass has been used in a variety of fields, including automobile windshields and architectural applications. In addition, progress has been made in the development of solar cell modules, in which multiple solar power generation cells are enclosed within laminated glass.

[0003] Patent Document 1 discloses a technology related to laminated glass. The laminated glass disclosed in Patent Document 1 has strip-shaped edge protection members provided on the side edge surfaces of the first glass sheet and the second glass sheet.

[0004] International Publication No. 2014 / 098160

[0005] The laminated glass includes a first glass sheet, a second glass sheet disposed opposite the first glass sheet, and an intermediate adhesive layer disposed between the first and second glass sheets. For example, to improve the strength of the laminated glass, chemically strengthened glass may be used for at least one of the first and second glass sheets.

[0006] However, chemically strengthened glass has a problem in that if scratches deeper than the compressive stress layer depth (DOL) of the chemically strengthened glass occur, the strength of the chemically strengthened glass decreases. For example, if the edge of the chemically strengthened glass comes into contact with a transport pallet during transportation of the laminated glass, the laminated glass may be damaged.

[0007] In the laminated glass disclosed in Patent Document 1, strip-shaped edge protection members are provided on the side edge surfaces of the first glass sheet and the second glass sheet. However, the technology disclosed in Patent Document 1 has a problem in that the manufacturing cost increases because the edge protection members are separately provided on the side edge surfaces of the first glass sheet and the second glass sheet.

[0008] In view of the above problems, an object of the present invention is to provide a light-transmitting member, a solar cell module, and a method for manufacturing a light-transmitting member that can suppress a decrease in strength of a light-transmitting member including chemically strengthened glass while reducing manufacturing costs.

[0009] A light-transmitting member, a solar cell module, and a method for manufacturing a light-transmitting member according to one aspect of the present invention are as follows.

[0010] [1] A light-transmitting member comprising: a first light-transmitting member; a second light-transmitting member arranged to face the first light-transmitting member; and an intermediate adhesive film arranged between the first light-transmitting member and the second light-transmitting member, wherein the first light-transmitting member is made of chemically strengthened glass, and side surfaces of the first light-transmitting member and the second light-transmitting member are covered with the intermediate adhesive film.

[0011] [2] The light-transmitting member according to [1], wherein the thickness of the intermediate adhesive film on the side surfaces of the first light-transmitting member and the second light-transmitting member is 0.1 mm or more and 5 mm or less.

[0012] [3] The translucent member according to [1] or [2], wherein the compressive stress layer depth DOL of the chemically strengthened glass that is the first translucent member is 10 μm or more.

[0013] [4] The light-transmitting member according to any one of [1] to [3], wherein the second light-transmitting member is made of float glass, tempered glass, or resin.

[0014] [5] The second translucent member is a chemically strengthened glass, and the chemically strengthened glass of the first translucent member has a compressive stress layer depth DOL of 10 μm or more, and the chemically strengthened glass of the second translucent member has a compressive stress layer depth DOL of 10 μm or more. The translucent member according to [1] or [2].

[0015] [6] The light-transmitting member according to any one of [1] to [4], wherein the first light-transmitting member has a thickness of 0.7 mm or more, and the second light-transmitting member has a thickness of 0.01 mm or more.

[0016] [7] The light-transmitting member according to any one of [1] to [6], wherein when the light-transmitting member is cut along a cross section perpendicular to a main surface of the light-transmitting member, the cross-sectional shape of the intermediate adhesive film covering the side surfaces of the first light-transmitting member and the second light-transmitting member is a crescent shape.

[0017] [8] A solar cell module comprising: the light-transmitting member according to any one of [1] to [7]; and a photovoltaic cell disposed between the first light-transmitting member and the second light-transmitting member of the light-transmitting member.

[0018] [9] A method for manufacturing a translucent member, comprising: a step of forming a laminate by stacking a second translucent member, an intermediate adhesive film, and a first translucent member that is chemically strengthened glass; and a step of heating and pressurizing the laminate, wherein in the step of heating and pressurizing the laminate, the intermediate adhesive film is caused to protrude from between the first translucent member and the second translucent member so that side surfaces of the first translucent member and the second translucent member are covered with the intermediate adhesive film.

[0019]

[10] The method for manufacturing a light-transmitting member according to [9], further comprising the step of arranging a frame around the laminate such that side surfaces of the first light-transmitting member and the second light-transmitting member are spaced apart from inner side surfaces of the frame, and in the step of heating and pressurizing the laminate, the intermediate adhesive film is caused to protrude from between the first light-transmitting member and the second light-transmitting member, and the protruding intermediate adhesive film is filled between the side surfaces of the first light-transmitting member and the second light-transmitting member and the inner side surface of the frame, so that the side surfaces of the first light-transmitting member and the second light-transmitting member are covered with the intermediate adhesive film.

[0020]

[11] The method for manufacturing a light-transmitting member according to [9] or

[10] , wherein the thickness of the intermediate adhesive film on the side surfaces of the first light-transmitting member and the second light-transmitting member is set to 0.1 mm or more and 5 mm or less.

[0021] The present invention can provide a light-transmitting member, a solar cell module, and a method for manufacturing a light-transmitting member that can suppress a decrease in strength of a light-transmitting member containing chemically strengthened glass while suppressing manufacturing costs.

[0022] Fig. 1 is a cross-sectional view showing a configuration example of a light-transmitting member according to an embodiment; Fig. 2 is a plan view showing a configuration example of a light-transmitting member according to an embodiment; Fig. 3 is a cross-sectional view showing an example of a manufacturing method of a light-transmitting member according to an embodiment; Fig. 4 is a cross-sectional view showing an example of a manufacturing method of a light-transmitting member according to an embodiment; Fig. 5 is a plan view showing an example of a manufacturing method of a light-transmitting member according to an embodiment; Fig. 6 is a plan view showing a solar cell module according to an embodiment; Fig. 7 is a cross-sectional view showing a solar cell module according to an embodiment; Fig. 8 is a cross-sectional view showing another configuration example of a light-transmitting member according to an embodiment.

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0024] <Light-Transmitting Member> Fig. 1 is a cross-sectional view showing an example of the configuration of a light-transmitting member according to an embodiment, and Fig. 2 is a plan view showing an example of the configuration of a light-transmitting member according to an embodiment.

[0025] As shown in FIGS. 1 and 2 , the light-transmitting member 1 according to this embodiment includes a first light-transmitting member 11, a second light-transmitting member 12 arranged to face the first light-transmitting member 11, and an intermediate adhesive film 13 arranged between the first light-transmitting member 11 and the second light-transmitting member 12.

[0026] In this embodiment, the first translucent member 11 is chemically strengthened glass. Chemically strengthened glass is glass that is strengthened by, for example, contacting glass with a molten salt containing alkali metal ions to cause ion exchange between the alkali metal ions in the glass and the alkali metal ions in the molten salt, thereby forming a compressive stress layer on the glass surface. The compressive stress layer depth DOL of the chemically strengthened glass that is the first translucent member 11 is preferably 10 μm or more, more preferably 15 μm or more, and even more preferably 20 μm or more. The greater the value of the compressive stress layer depth DOL of the chemically strengthened glass, the stronger the strength of the chemically strengthened glass.

[0027] The compressive stress layer depth DOL of chemically strengthened glass can be measured by propagating light along the surface of the glass and using photoelastic technology. For example, the compressive stress layer depth DOL of chemically strengthened glass can be measured using a surface stress meter FSM-6000 manufactured by Orihara Seisakusho Co., Ltd.

[0028] In the present embodiment, the thickness of the first light-transmitting member 11 is preferably 0.7 mm or more, more preferably 1.3 mm or more, and even more preferably 3.0 mm or more. The thicker the first light-transmitting member 11, the stronger the strength of the first light-transmitting member 11.

[0029] The second light-transmitting member 12 is disposed opposite the first light-transmitting member 11. The second light-transmitting member 12 is made of float glass (unbleached glass), tempered glass, resin, or chemically strengthened glass. Tempered glass is glass that is strengthened by heating the glass to near its softening temperature and then rapidly cooling it, thereby generating compressive stress on the surface of the glass.

[0030] Furthermore, when the second light-transmitting member 12 is made of resin, a resin sheet formed of acrylic resin, PS (polystyrene), PC (polycarbonate), ETFE (ethylene-tetrafluoroethylene copolymer), ECTFE (ethylene-chlorotrifluoroethylene copolymer), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), PET (polyethylene terephthalate), or the like may be used. The second light-transmitting member 12 may also be formed of a combination of these materials. When the second light-transmitting member 12 is made of resin, the thickness of the second light-transmitting member 12 is preferably 0.01 mm or greater.

[0031] The second translucent member 12 may be made of chemically strengthened glass. When the second translucent member 12 is made of chemically strengthened glass, the compressive stress layer depth DOL of the chemically strengthened glass is preferably 10 μm or more, more preferably 15 μm or more, and even more preferably 20 μm or more. The greater the value of the compressive stress layer depth DOL of the chemically strengthened glass, the stronger the strength of the chemically strengthened glass.

[0032] When the second light-transmitting member 12 is made of chemically strengthened glass, the thickness of the second light-transmitting member 12 is preferably 0.7 mm or more, more preferably 1.3 mm or more, and even more preferably 3.0 mm or more. The thicker the second light-transmitting member 12, the stronger the strength of the second light-transmitting member 12.

[0033] The intermediate adhesive film 13 is disposed between the first light-transmissive member 11 and the second light-transmissive member 12. In other words, the first light-transmissive member 11 and the second light-transmissive member 12 are bonded together using the intermediate adhesive film 13. When forming the light-transmissive member 1, the first light-transmissive member 11, the intermediate adhesive film 13, and the second light-transmissive member 12 are laminated in this order, and the laminate is heated and pressurized to bond them together, thereby forming the light-transmissive member 1.

[0034] The thickness of the intermediate adhesive film 13 is preferably 0.38 mm or more, more preferably 0.76 mm or more, and even more preferably 1.52 mm or more. The thickness of the intermediate adhesive film 13 is preferably 4.56 mm or less. The intermediate adhesive film 13 may be made of EVA (ethylene-vinyl acetate copolymer) resin, PVB (polyvinyl butyral) resin, ionomer resin, COP (cycloolefin polymer), polyurethane, PVC (polyvinyl chloride), POE (polyolefin elastomer), TPO (olefin-based thermoplastic elastomer), or the like. The intermediate adhesive film 13 may also be made of a combination of these materials.

[0035] As shown in FIG. 1 , in the light-transmitting member 1 according to this embodiment, the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 are covered with an intermediate adhesive film 13. That is, as shown in FIG. 2 , when the light-transmitting member 1 is viewed in plan, the peripheries of the first light-transmitting member 11 and the second light-transmitting member 12 are covered with the intermediate adhesive film 13. In the configuration example shown in FIG. 2 , the light-transmitting member 1 is rectangular, and the four peripheral side surfaces of the first light-transmitting member 11 and the second light-transmitting member 12 are covered with the intermediate adhesive film 13. In this case, the thickness a of the intermediate adhesive film 13 on the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 is preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.5 mm or more. Furthermore, the thickness a of the intermediate adhesive film 13 is preferably 5 mm or less, more preferably 3 mm or less, even more preferably 2 mm or less, and even more preferably 1 mm or less.

[0036] In this embodiment, the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 are configured to be covered with an intermediate adhesive film 13. With this configuration, the side surfaces of the first light-transmitting member 11 and the second light-transmitting member 12 can be protected using the intermediate adhesive film 13, thereby preventing a decrease in the strength of the light-transmitting members. In particular, in this embodiment, chemically strengthened glass is used as the first light-transmitting member 11. Chemically strengthened glass has the property that its edge strength decreases when scratches deeper than the compressive stress layer depth DOL occur. In this embodiment, the side surfaces of the first light-transmitting member 11 (chemically strengthened glass) are configured to be covered with the intermediate adhesive film 13. Therefore, scratches deeper than the compressive stress layer depth DOL can be prevented from occurring on the side surfaces of the first light-transmitting member 11 (chemically strengthened glass). Therefore, a decrease in the strength of the light-transmitting member including chemically strengthened glass can be prevented.

[0037] Furthermore, in this embodiment, the intermediate adhesive film 13 is used as a member covering the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12. This eliminates the need to provide separate members covering the side surfaces of the first glass plate 11 and the second glass plate 12, thereby reducing manufacturing costs. Therefore, the invention according to this embodiment can reduce manufacturing costs while preventing a decrease in the strength of light-transmissive members including chemically strengthened glass.

[0038] Furthermore, for example, when manufacturing a translucent member (laminated glass) using chemically strengthened glass, a process of cutting the intermediate adhesive film protruding from the edge of the translucent member with a blade may be performed. In such cases, when cutting the intermediate adhesive film with a blade, the blade may come into contact with the chemically strengthened glass, causing scratches deeper than the compressive stress layer depth DOL of the chemically strengthened glass. In such cases, there is a problem of reduced edge strength of the translucent member (laminated glass).

[0039] On the other hand, in the present embodiment, an intermediate adhesive film 13 is used as a member covering the side surfaces 14 of the first translucent member 11 and the second translucent member 12. Therefore, it is not necessary to cut the intermediate adhesive film 13 with a blade, which also prevents a decrease in the strength of the translucent member containing chemically strengthened glass. Furthermore, even if it is necessary to cut the intermediate adhesive film 13 with a blade, the side surfaces 14 of the first translucent member 11 and the second translucent member 12 are already covered with the intermediate adhesive film 13, which prevents the blade from coming into contact with the chemically strengthened glass when cutting the intermediate adhesive film 13 with the blade. Therefore, a decrease in the strength of the translucent member containing chemically strengthened glass can be prevented.

[0040] In the present embodiment, the light-transmitting member 1 may have a shape other than a rectangle. In this case, too, by covering the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 with the intermediate adhesive film 13, it is possible to prevent a decrease in the strength of the light-transmitting member including the chemically strengthened glass.

[0041] 1 and 2 show a configuration example in which the entire side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 are covered with the intermediate adhesive film 13. However, in the present embodiment, a configuration in which only a portion of the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 is not covered with the intermediate adhesive film 13 may be used.

[0042] <Method of Manufacturing Light-Transmitting Member> Next, a method of manufacturing a light-transmitting member according to this embodiment will be described. Fig. 3 and Fig. 4 are cross-sectional views showing an example of a method of manufacturing a light-transmitting member according to this embodiment. Fig. 5 is a plan view showing an example of a method of manufacturing a light-transmitting member according to this embodiment.

[0043] When manufacturing the light-transmitting member according to this embodiment, first, a first light-transmitting member 11, a second light-transmitting member 12, and an intermediate adhesive film 13, each of which is made of chemically strengthened glass, are prepared. Then, as shown in FIG. 3 , the second light-transmitting member 12, the intermediate adhesive film 13, and the first light-transmitting member 11 are stacked to form a stacked body 30. In addition, a frame 31 is placed around the stacked body 30. At this time, the frame 31 is placed around the stacked body 30 so that the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 are spaced apart from the inner side surface of the frame 31.

[0044] Thereafter, the laminate 30 is heated and pressurized. By heating and pressurizing the laminate 30, the intermediate adhesive film 13 protrudes from between the first light-transmissive member 11 and the second light-transmissive member 12, and as shown in FIGS. 4 and 5 , the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 are covered with the intermediate adhesive film 13. In other words, by heating and pressurizing the laminate 30, the intermediate adhesive film 13 protrudes from between the first light-transmissive member 11 and the second light-transmissive member 12, and the protruding intermediate adhesive film 13 fills the gaps between the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 and the inner side surfaces of the frame 31. As a result, the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 are covered with the intermediate adhesive film 13.

[0045] The thickness a of the intermediate adhesive film 13 on the side surfaces 14 of the first and second light-transmissive members 11 and 12 is preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.5 mm or more. The thickness a of the intermediate adhesive film 13 is preferably 5 mm or less, more preferably 3 mm or less, even more preferably 2 mm or less, and even more preferably 1 mm or less. The thickness a of the intermediate adhesive film 13 on the side surfaces 14 of the first and second light-transmissive members 11 and 12 is determined by the distance between the side surfaces 14 of the first and second light-transmissive members 11 and 12 and the inner side surfaces of the frame 31. Therefore, the thickness a of the intermediate adhesive film 13 can be adjusted by adjusting the distance between the side surfaces 14 of the first and second light-transmissive members 11 and 12 and the inner side surfaces of the frame 31.

[0046] In this embodiment, the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 are configured to be covered with the intermediate adhesive film 13. Therefore, the amount of intermediate adhesive film 13 used during manufacturing is the sum of the amount of intermediate adhesive film 13 that will be disposed between the first light-transmissive member 11 and the second light-transmissive member 12 upon completion and the amount of intermediate adhesive film 13 that will be disposed on the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 upon completion. Therefore, when forming the stacked body 30 shown in FIG. 3 , the amount of intermediate adhesive film 13 that is the sum of these amounts is disposed.

[0047] 3 shows an example in which the intermediate adhesive film 13 is disposed so as to protrude from the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 when the laminate 30 is formed. However, in the present embodiment, the intermediate adhesive film 13 may be disposed so as not to protrude from the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12. In other words, when the laminate 30 is viewed in plan, the dimensions of the intermediate adhesive film 13 may be equal to or smaller than the dimensions of the first light-transmissive member 11 and the second light-transmissive member 12. In this case, when the laminate 30 is heated and pressurized, the intermediate adhesive film 13 protrudes from between the first light-transmissive member 11 and the second light-transmissive member 12, and this protruding intermediate adhesive film 13 covers the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12.

[0048] Furthermore, in this embodiment, the frame 31 disposed around the laminate 30 may be made of a metal material. If the frame 31 is made of a metal material in this way, the frame 31 is also heated to a high temperature when the laminate 30 is heated and pressurized. Therefore, the intermediate adhesive film 13 that protrudes from between the first light-transmitting member 11 and the second light-transmitting member 12 can be heated using the frame 31. Therefore, the intermediate adhesive film 13 can be appropriately filled between the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 and the inner side surface of the frame 31.

[0049] By using the manufacturing method described above, the light-transmitting member according to this embodiment can be manufactured.

[0050] <Solar Cell Module> Next, a solar cell module according to the present embodiment will be described. Fig. 6 is a plan view showing the solar cell module according to the embodiment. Fig. 7 is a cross-sectional view showing the solar cell module according to the embodiment, taken along the line VII-VII in Fig. 6.

[0051] As shown in Figures 6 and 7 , the solar cell module 2 according to this embodiment includes the light-transmitting member 1 according to the above-described embodiment and photovoltaic cells 41 arranged between the first light-transmitting member 11 and the second light-transmitting member 12 of the light-transmitting member 1. As shown in Figure 6 , the photovoltaic cells 41 are arranged in an array in the horizontal and vertical directions when the light-transmitting member 1 is viewed in a plan view. Figure 6 shows, as an example, a configuration in which multiple photovoltaic cells 41 are arranged in an array of four cells in the horizontal direction and six cells in the vertical direction (i.e., a 4 x 6 array). Note that the configuration shown in Figure 6 is just an example, and the number of photovoltaic cells 41 arranged in the horizontal and vertical directions can be determined arbitrarily. The photovoltaic cells 41 inside the solar cell module 2 are connected to each other by conductive interconnectors (not shown).

[0052] As shown in FIG. 7 , in the solar cell module 2 according to this embodiment, the photovoltaic cells 41 are sealed between the first light-transmitting member 11 and the second light-transmitting member 12, i.e., inside the intermediate adhesive film 13. The photovoltaic cells 41 can be configured using photovoltaic cells of silicon-based single crystal type, silicon-based polycrystalline type, amorphous silicon type, thin-film silicon type, CIGS type, organic thin-film type, dye-sensitized type, perovskite type, or the like. As shown in FIG. 6 , each photovoltaic cell 41 has a rectangular shape. For example, each photovoltaic cell 41 may have a square, rectangular, or circular shape. Furthermore, for example, a monofacial photovoltaic cell may be used as the photovoltaic cell 41. Furthermore, a bifacial photovoltaic cell may be used as the photovoltaic cell 41.

[0053] When forming the solar cell module 2, the second translucent member 12, the intermediate adhesive film 13, the solar cell 41, the intermediate adhesive film 13, and the first translucent member 11 are laminated in this order, and this laminate is heated and pressurized to bond them together, thereby forming the solar cell module 2. At this time, the intermediate adhesive film 13 arranged below the solar cell 41 and the intermediate adhesive film 13 arranged above it are heated and melted, so that the completed solar cell module 2 consists of a single layer of intermediate adhesive film 13.

[0054] In the solar cell module 2 according to the present embodiment, the side surfaces 14 of the first light-transmissive member 11 and the second light-transmissive member 12 are also configured to be covered with the intermediate adhesive film 13. This makes it possible to suppress a decrease in the strength of the light-transmissive members including chemically strengthened glass while suppressing manufacturing costs.

[0055] The present invention is not limited to the above-described embodiment and may be modified as appropriate without departing from the spirit of the present invention. For example, in this embodiment, as shown in FIG. 8 , when the light-transmitting member 1a is cut along a cross section perpendicular to the main surface of the light-transmitting member 1a, the cross-sectional shape of the intermediate adhesive film 13a covering the side surfaces 14 of the first light-transmitting member 11 and the second light-transmitting member 12 may be configured to be crescent-shaped. In other words, the intermediate adhesive film 13a covering the edge portion on the surface side of the first light-transmitting member 11 may be configured to have a curvature, and the intermediate adhesive film 13a covering the edge portion on the surface side of the second light-transmitting member 12 may be configured to have a curvature. In other words, the thickness of the intermediate adhesive film 13a covering the edge portion on the surface side of the first light-transmitting member 11 and the intermediate adhesive film 13a covering the edge portion on the surface side of the second light-transmitting member 12 may be configured to be thinner than the thickness of the intermediate adhesive film 13a covering the center of the light-transmitting member 1a.

[0056] In this configuration, the side surfaces of the first light-transmitting member 11 and the second light-transmitting member 12 can be protected by the intermediate adhesive film 13a, thereby preventing a decrease in the strength of the light-transmitting member 1a. Furthermore, because the intermediate adhesive film 13a covering the edge portions on the front surface of the first light-transmitting member 11 and the intermediate adhesive film 13a covering the edge portions on the front surface of the second light-transmitting member 12 have a curvature, the edge portions of the light-transmitting member 1a can be prevented from getting caught on other members when the light-transmitting member 1a is moved, improving workability.

[0057] The present invention has been described above in accordance with the above-described embodiments, but the present invention is not limited to the configurations of the above-described embodiments, and naturally includes various modifications, alterations, and combinations that can be made by a person skilled in the art within the scope of the invention claimed in the claims of this application.

[0058] This application claims priority based on Japanese Patent Application No. 2023-208440, filed December 11, 2023, the disclosure of which is incorporated herein by reference in its entirety.

[0059] REFERENCE SIGNS LIST 1, 1a Light-transmitting member 2 Solar cell module 11 First light-transmitting member 12 Second light-transmitting member 13, 13a Intermediate adhesive film 14 Side surface 30 Laminated body 31 Frame body 41 Photovoltaic power generation cell

Claims

1. A light-transmitting member comprising: a first light-transmitting member; a second light-transmitting member arranged to face the first light-transmitting member; and an intermediate adhesive film arranged between the first light-transmitting member and the second light-transmitting member, wherein the first light-transmitting member is made of chemically strengthened glass, and side surfaces of the first light-transmitting member and the second light-transmitting member are covered with the intermediate adhesive film.

2. The light-transmitting member according to claim 1, wherein the thickness of said intermediate adhesive film on the side surfaces of said first light-transmitting member and said second light-transmitting member is 0.1 mm or more and 5 mm or less.

3. The translucent member according to claim 1 or 2, wherein the compressive stress layer depth DOL of the chemically strengthened glass that is the first translucent member is 10 μm or more.

4. The light-transmitting member according to claim 1 or 2, wherein the second light-transmitting member is made of float glass, tempered glass, or resin.

5. The translucent member according to claim 1 or 2, wherein the second translucent member is chemically strengthened glass, the chemically strengthened glass of the first translucent member has a compressive stress layer depth DOL of 10 μm or more, and the chemically strengthened glass of the second translucent member has a compressive stress layer depth DOL of 10 μm or more.

6. The light-transmitting member according to claim 1 or 2, wherein the first light-transmitting member has a thickness of 0.7 mm or more, and the second light-transmitting member has a thickness of 0.01 mm or more.

7. The light-transmitting member according to claim 1 or 2, wherein when the light-transmitting member is cut along a cross section perpendicular to the main surface of the light-transmitting member, the cross-sectional shape of the intermediate adhesive film covering the side surfaces of the first light-transmitting member and the second light-transmitting member is a half-moon shape.

8. A solar cell module comprising: the light-transmitting member according to claim 1 or 2; and a photovoltaic cell disposed between the first light-transmitting member and the second light-transmitting member of the light-transmitting member.

9. A method for manufacturing a translucent member, comprising: a step of forming a laminate by stacking a second translucent member, an intermediate adhesive film, and a first translucent member which is chemically strengthened glass; and a step of heating and pressurizing the laminate, wherein in the step of heating and pressurizing the laminate, the intermediate adhesive film is caused to protrude from between the first and second translucent members so that side surfaces of the first and second translucent members are covered with the intermediate adhesive film.

10. A method for manufacturing a light-transmitting member according to claim 9, further comprising the step of: arranging a frame around the laminate such that side surfaces of the first light-transmitting member and the second light-transmitting member are spaced apart from an inner side surface of the frame; and in the step of heating and pressurizing the laminate, the intermediate adhesive film is caused to protrude from between the first light-transmitting member and the second light-transmitting member and the protruding intermediate adhesive film is filled between the side surfaces of the first light-transmitting member and the second light-transmitting member and the inner side surface of the frame, so that the side surfaces of the first light-transmitting member and the second light-transmitting member are covered with the intermediate adhesive film.

11. The method for manufacturing a light-transmitting member according to claim 9 or 10, wherein the thickness of the intermediate adhesive film on the side surfaces of the first light-transmitting member and the second light-transmitting member is 0.1 mm or more and 5 mm or less.

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