Solar cell panel

Abstract

A solar cell panel 1000 comprises a solar cell module 160 and a frame member 100. The solar cell module 160 includes: a first substrate 120; a second substrate 130; a first sealing member 110 that seals a space between the first substrate 120 and the second substrate 130 at ends of the first substrate 120 and the second substrate 130; and a solar cell 140 disposed in the sealed space. The frame member 100 has translucency lower than that of the first substrate 120. The frame member 100 has a shape sandwiching the first substrate 120 and the second substrate 130 at least at the ends of the substrates where the first sealing member 110 is present. In a cross-sectional view, the angle between a line segment connecting an end A of the frame member 100 that is positioned on the side closer to the solar battery cell 140 and an end B of the first sealing member 110 that is positioned on the side farther from the solar battery cell, and a line segment perpendicular to a main surface of the first substrate 120 is larger than the Brewster angle.

Description

Solar cell panel

[0001] The present disclosure relates to a solar cell panel.

[0002] Examples of forms of building-integrated solar cells include glass building-integrated solar cells as described in Patent Document 1, for example. That is, a solar cell serving as a power generation unit is disposed between two glass substrates, and the space between the two glass substrates is sealed with a sealing material. A frame member is disposed on the sealed window glass so as to overlap when viewed from the light-receiving surface side, and wirings are housed in the frame member.

[0003] International Publication No. WO 2019 / 181689

[0004] In building-integrated solar cells, since high durability as a building material is expected, further higher durability of the solar cells inside the window glass is required. As a means for improving the durability of solar cells, it is required to suppress deterioration of the sealing material and prevent intrusion of external water, oxygen and other deterioration factors into the solar cells disposed between the glass substrates for a long period of time.

[0005] On the other hand, in building-integrated solar cells, since high designability as a building material is required, a certain degree of light transmission is necessary in a window glass region that does not overlap with the frame member described in Patent Document 1. Therefore, as a form of the sealing material for a building-integrated solar cell, an intermediate sealing material having high light transmission properties is selected and disposed in a region that has a role of taking in light as a window glass, and an end sealing material having high properties of preventing intrusion of water and oxygen is selected and disposed in a region where the window glass and the frame member overlap. Such a structure is desirable.

[0006] That is, in order to achieve both high durability and high designability required for building-integrated solar cells, there is a demand for a structural design that mainly prevents intrusion of water and oxygen from the external environment and suppresses deterioration of the end sealing material.

[0007] Accordingly, the present disclosure provides a technique capable of improving durability with respect to a solar cell panel applicable to, for example, a building-integrated solar cell.

[0008] The solar cell panel of the present disclosure comprises: a solar cell module; and a frame member for holding the solar cell module, wherein the solar cell module includes: a light-transmitting first substrate; a second substrate disposed opposite to the first substrate; a first sealing member that seals the space between the first substrate and the second substrate at the ends of the first and second substrates; and solar cells disposed in the space sealed by the first sealing member, wherein the frame member has lower light transmittance than the first substrate; the frame member has a shape that sandwiches the first substrate and the second substrate at least at the ends of the first and second substrates where the first sealing member is present; and in a cross-sectional view in the thickness direction of the solar cell panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end B of the first sealing member located further away from the solar cell and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle.

[0009] The technology described herein can improve the durability of solar panels.

[0010] Figure 1 is a cross-sectional view showing the schematic configuration of a solar cell panel in Embodiment 1. Figure 2 is an enlarged cross-sectional view of region Z1 in the solar cell panel of Figure 1. Figure 3 is a cross-sectional view showing the schematic configuration of a solar cell panel in Embodiment 2. Figure 4 is an enlarged cross-sectional view of region Z2 in the solar cell panel of Figure 3. Figure 5 is a cross-sectional view showing the schematic configuration of a solar cell panel in Embodiment 3. Figure 6 is an enlarged cross-sectional view of region Z3 in the solar cell panel of Figure 5. Figure 7 is a cross-sectional view showing the schematic configuration of a solar cell panel in Embodiment 4. Figure 8 is an enlarged cross-sectional view of region Z4 in the solar cell panel of Figure 7. Figure 9 is a cross-sectional view showing the schematic configuration of a solar cell panel in Embodiment 5. Figure 10 is an enlarged cross-sectional view of region Z5 in the solar cell panel of Figure 9. Figure 11 is a cross-sectional view showing the schematic configuration of a solar cell panel in Embodiment 6. Figure 12 is an enlarged cross-sectional view of region Z6 in the solar cell panel of Figure 11.

[0011] (Knowledge leading to one aspect of this disclosure) The present inventors have found that the following problems arise when investigating the sealing structure of solar cells in building material-integrated solar cells, particularly in building material-integrated perovskite solar cells.

[0012] As described in Patent Document 1 above, in a structure in which solar cells are placed between two glass substrates, it is necessary to fill and seal the space between the substrates other than the solar cells with a filler material. For this reason, a resin material is selected as the filler material because it has low permeability to water and oxygen, is flexible, and is inexpensive.

[0013] In addition to filling the space between substrates with the filler material described above, another method for sealing the space between the two substrates is to place a sealing member to close the opening between the two substrates at the substrate edges, thereby sealing the space between the two substrates with the sealing member placed at the substrate edges. Such sealing members provided at the substrate edges are sometimes called edge sealing members. Resin materials are also selected for such sealing members placed at the substrate edges.

[0014] As mentioned above, resin materials are commonly used for the encapsulation structure of solar cells, such as fillers and encapsulating members. However, when resin materials are exposed to sunlight for extended periods, material deformation is caused by light or thermal energy, and degradation progresses easily. In particular, when sunlight is easily directly incident on the encapsulating member placed at the edge of the substrate, photodegradation or thermal degradation of the encapsulating member becomes significant. Since building-integrated solar cells are placed in locations exposed to sunlight, sunlight accelerates the degradation of the encapsulating member, allowing water and oxygen to penetrate, which can reduce the lifespan of solar cells, especially perovskite solar cells.

[0015] Therefore, the inventors focused on the relationship between the angle of incidence of sunlight and the reflectance, which accelerates the deterioration of the sealing material.

[0016] Sunlight is randomly polarized, containing roughly equal amounts of p-polarized and s-polarized light. When sunlight is incident perpendicularly to a glass surface at an angle of incidence of 0°, the reflectivity of sunlight, considering its polarization characteristics, has the following properties.

[0017] As the angle of incidence of sunlight on the glass surface increases, the reflectivity of s-polarized sunlight increases monotonically, and when the angle of incidence reaches 90°, almost all s-polarized light is reflected.

[0018] On the other hand, as the angle of incidence of sunlight on the glass surface increases, the reflectivity of p-polarized sunlight decreases monotonically, reaching 0% at the Brewster angle. In other words, the amount of p-polarized light transmitted through the glass increases monotonically. Furthermore, at angles greater than the Brewster angle, the reflectivity of p-polarized light increases monotonically, and at an incident angle of 90°, almost all p-polarized light is reflected.

[0019] Here, when N1 is the refractive index of the material on the side into which the light is incident, and N2 is the refractive index of the substrate of the solar cell panel, the Brewster angle θ B θ is expressed by the following formula: B = tan -1 (N2 / N1)

[0020] For example, if the refractive index of the atmosphere is 1.00 and the refractive index of the glass plate is 1.52, the Brewster angle when light is incident on the glass plate from the atmosphere side will be 56.7°.

[0021] Based on the properties of light polarization and reflectivity described above, for example, if we consider sunlight containing 50% p-polarized light and 50% s-polarized light, the reflectivity of glass to sunlight increases monotonically as the angle of incidence increases, and the reflectivity increases significantly in the region where the angle of incidence is greater than the Brewster angle.

[0022] Based on the relationship between the angle of incidence of sunlight and reflectance as described above, the inventors have found that by blocking sunlight with an angle of incidence of 1 / 2 or less than the Brewster angle with a frame member, the amount of sunlight incident on the sealing member is reduced, thereby suppressing the degradation of the sealing member due to sunlight and improving the durability of the solar cell. This has led to the realization of a building-integrated solar cell.

[0023] This disclosure provides a building-integrated solar cell in which the radiation irradiation of the sealing member to the sealing member is reduced and the durability of the solar cell is improved by considering the arrangement structure of the frame member and the sealing member so that only sunlight with an incident angle greater than the Brewster angle is irradiated to the sealing member.

[0024] The following is an overview of one aspect of this disclosure.

[0025] A solar cell panel in one aspect of the present disclosure comprises a solar cell module and a frame member for holding the solar cell module. The solar cell module includes a light-transmitting first substrate, a second substrate disposed opposite to the first substrate, a first sealing member that seals the space between the first and second substrates at the edges of the first and second substrates, and solar cells disposed in the space sealed by the first sealing member. The frame member has lower light transmittance than the first substrate. The frame member has a shape that sandwiches the first and second substrates at least at the edges of the first and second substrates where the first sealing member is present. In a cross-sectional view in the thickness direction of the solar cell panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end B of the first sealing member located further away from the solar cell, and the line segment perpendicular to the main surface of the first substrate, is greater than the Brewster angle.

[0026] Here, in this specification, light transmission means transmission to sunlight, for example, transmission to light in the wavelength range of 400 nm to 1000 nm.

[0027] With the above configuration, sunlight with a high transmittance and an incident angle of less than or equal to the Brewster angle is blocked by the frame member and therefore does not enter the first sealing member. In addition, light with an incident angle greater than the Brewster angle is easily reflected by the first substrate, so degradation of the first sealing member due to light and thermal energy caused by sunlight incidence is suppressed. Consequently, the durability of the solar cell panel in one embodiment of this disclosure is improved. As a result, if the solar cell panel in one embodiment of this disclosure is applied to, for example, a building-integrated solar cell, the durability of the building-integrated solar cell is improved.

[0028] Embodiments of the present disclosure will be described below with reference to the drawings.

[0029] (Embodiment 1) Figure 1 is a cross-sectional view showing the schematic configuration of the solar cell panel 1000 in Embodiment 1. Figure 2 is an enlarged cross-sectional view of region Z1 in the solar cell panel of Figure 1. Note that the cross-sectional views shown in Figures 1 and 2 show the cross-section obtained by cutting the solar cell panel 1000 in the thickness direction of the solar cell panel 1000. Therefore, the cross-sectional views shown in Figures 1 and 2 show the configuration of the solar cell panel 1000 in a cross-sectional view in the thickness direction of the solar cell panel 1000.

[0030] The solar panel 1000 in Embodiment 1 includes a frame member 100, a first sealing member 110, a first substrate 120, a second substrate 130, and a solar cell module 160 including a solar cell 140.

[0031] The first substrate 120 and the second substrate 130 are arranged facing each other. The first sealing member 110 is located between the first substrate 120 and the second substrate 130, and is positioned at the ends of the first substrate 120 and the second substrate 130. In the solar cell module 160, a sealed space 150 is formed as a sealed space surrounded by the first substrate 120, the second substrate 130, and the first sealing member 110 arranged in this manner.

[0032] A portion of the first sealing member 110 is in contact with the first substrate 120 and the second substrate 130. The solar cell 140 is placed in the sealing space 150.

[0033] Figure 2 is an enlarged cross-sectional view of region Z1 in the solar cell panel of Figure 1. As shown in Figure 2, the vicinity 1001 of the frame member of the solar cell panel 1000 comprises a frame member 101, a first sealing member 111, a first substrate 121, a second substrate 131, and a solar cell 141. The sealing space 151 is a space formed by being surrounded by the first substrate 121, the second substrate 131, and the first sealing member 111. The frame member end 171 corresponds to end A of the frame member 101 located closer to the solar cell 141. The sealing member joint 161, where the first sealing member 111, the second substrate 131, and the sealing space 151 are in contact, corresponds to end B of the first sealing member 111 located further away from the solar cell 141.

[0034] Furthermore, the angle 181 formed by the line segment connecting the frame member end 171 (i.e., end A) and the sealing member joint 161 (i.e., end B) and the line segment perpendicular to the first substrate 121 is greater than the Brewster angle.

[0035] With the above configuration, the incidence of sunlight on the first sealing member 111 is suppressed, and the photodegradation and thermal degradation of the first sealing member 111 are reduced, thereby improving the durability of the solar cell panel 1000. Therefore, by applying the solar cell panel 1000 in Embodiment 1 to, for example, a building-integrated solar cell, a building-integrated solar cell with excellent durability can be realized.

[0036] The frame member 101 is required to have the function of blocking a portion of the sunlight irradiating the solar cell panel 1000 and reducing the amount of light irradiated to the first sealing member 111. For this reason, the frame member 101 has lower light transmittance than the first substrate 121. Preferably, at least a portion of the frame member 101 does not transmit sunlight. The frame member 101 is also required to have the function of fixing together, for example, the two substrates that seal the solar cell 141 (i.e., the first substrate 121 and the second substrate 131), and housing the wiring of the solar cell module 160. Therefore, the frame member 101 is fitted with a structure suitable for the solar cell module configuration.

[0037] A portion of the first sealing member 111 is in contact with the first substrate 121 and the second substrate 131, respectively. The first sealing member 111 also serves to seal the solar cells 141 from water and oxygen entering from the external environment of the solar panel 1000. Therefore, the material of the first sealing member 111 is selected to be, for example, a material with low water and oxygen permeability. Examples of materials for the first sealing member 111 include butyl rubber, polyisobutylene, ethylene propylene diene monomer, and silicone resin. The first sealing member 111 may include, for example, at least one selected from the group consisting of butyl rubber, polyisobutylene, ethylene propylene diene monomer, and silicone resin.

[0038] The material of the first substrate 121 is selected from light-transmitting materials. Examples of light-transmitting materials include materials that transmit light to sunlight, and more preferably materials that transmit light in the wavelength range of 400 nm to 1000 nm. Examples of such materials include glass, alumina, acrylic resin, polycarbonate, polyethylene terephthalate (PET) resin, ethylene tetrafluoroethylene, and the like.

[0039] The second substrate 131 may be made of the same material as the first substrate 121, or it may be made of a different material. Examples of materials for the second substrate 131 include translucent materials that can be selected as the material for the first substrate 121, non-translucent metal materials such as stainless steel sheets, and insulating materials such as ceramics. For example, when the solar cell panel 1000 is applied to a building-integrated solar cell, the second substrate 131 can also be used as a building material. Therefore, the second substrate 131 may be made of a material that can be used as a building material. For example, if the second substrate 131 is made of a translucent material, it can be used for applications such as window material, and if the second substrate 131 is made of a non-translucent material, it can be used for applications such as wall material.

[0040] Furthermore, in the region where the frame member 101 and the first substrate 121 and second substrate 131 overlap in the front direction (i.e., the direction perpendicular to the light-receiving surface), the first substrate 121 or the second substrate 131 may be marked in a way that allows for the management of the substrate. Examples of marks for managing the substrate include numbers, barcodes, QR codes (registered trademarks), etc., that can identify individual substrates. These marks can be attached to individual substrates by printing, laser processing, or attaching stickers. This makes production management easier.

[0041] Further, in a region where the frame member 101 and the first substrate 121 overlap in the front direction (that is, the direction perpendicular to the light-receiving surface), the first substrate 121 may be provided with an alignment mark used during substrate processing. The shape of the alignment mark is not particularly limited, and may be, for example, a cross mark, a closed shape, or a shape including a combination thereof. Such an alignment mark can be provided on each individual substrate by, for example, printing, laser processing, or the like. This makes it easy to manage production.

[0042] The solar battery cell 141 may be formed directly on the first substrate 121. That is, the solar battery cell 141 may be in direct contact with the first substrate 121. In this case, since no member is interposed between the first substrate 121 and the solar battery cell 141, high power generation efficiency of the solar battery cell 141 can be maintained.

[0043] Alternatively, the solar battery cell 141 may be formed by attaching a solar battery cell formed on a resin film to the first substrate 121 and supporting the same thereon. In this case, among the produced solar battery cells, only those with guaranteed quality can be selected and attached to the first substrate 121 to manufacture the solar panel 1000, which facilitates yield management and improves productivity.

[0044] Further, the solar battery cell 141 may contain a perovskite-type compound (for example, a perovskite semiconductor) as a photoelectric conversion material. A perovskite-type compound is a structure having a perovskite crystal structure represented by the chemical formula ABX3 and crystals similar thereto. Here, A is a monovalent cation, B is a divalent cation, and X is a halogen anion. Using a perovskite-type compound as a photoelectric conversion material can improve the power generation efficiency of the solar battery cell.

[0045] Furthermore, a part of the sealed space 151 may be filled with a material (internal filler) that is excellent in light transmittance and relatively excellent in gas barrier properties. Examples of the internal filler include polyolefin resins, EVA resins, ionomer resins, fluoropolymers, thermoplastic elastomers and the like. Filling the sealed space 151 with such a material makes it possible to achieve both excellent appearance design and high durability of the solar cell panel 1000.

[0046] Such a structure in which the sealed space 151 is filled with an internal filler can be obtained, for example, by preparing a sheet-shaped internal filler, laminating it between the first substrate 121 and the second substrate 131, and heating the laminate.

[0047] Furthermore, in the sealing member joint portion 161, the first sealing member 111, the second substrate 131, and the sealed space 151 are in contact with each other. The sealing member joint portion 161 is located at a position in the first sealing member 111 where sunlight can be incident at the lowest angle of incidence. When the incident angle of sunlight with respect to the solar cell panel 1000 is equal to or larger than the angle 181, that is, larger than the Brewster angle, the reflectance of sunlight increases remarkably, so that irradiation of sunlight is reduced in regions of the first sealing member 111 other than the sealing member joint portion 161.

[0048] For example, in cases such as when the first sealing member 111 has a shape that is convex toward the sealed space 151 (upward in FIG. 2), a part of the first sealing member 111 may be located on a line segment connecting the frame member end 171 and the sealing member joint portion 161. Furthermore, for example, a part of the first sealing member 111 may overlap with or be mixed with the internal filler filling the sealed space 151 in the in-plane direction. Even in this case, a part of the first sealing member 111 may be located on the line segment connecting the frame member end 171 and the sealing member joint portion 161. Even when a part of the first sealing member 111 is located on the line segment connecting the frame member end 171 and the sealing member joint portion 161 as described above, sunlight is less likely to irradiate the sealing member joint portion 161, so that the durability of the building-integrated solar cell can be further improved.

[0049] Furthermore, the installation position of the frame member end 171 is designed with the aim of shielding a portion of the sunlight irradiated onto the solar cell panel 1000 by the frame member 101, that is, shielding low-incidence light irradiated onto the first sealing member 111. From this viewpoint, the frame member end 171 may or may not be in contact with the first substrate 121. In Figure 2, as an example, the frame member end 171 is located at the contact point between the frame member 101 and the first substrate 121. The position of the frame member end 171 corresponds to end A as described above. From a different viewpoint, in a cross-sectional view of the solar cell panel 1000 in the thickness direction, when a line segment is created from the sealing member joint portion 161 that is in contact with a portion of the frame member 101, the point where the angle between that line segment and a line perpendicular to the first substrate 121 is largest corresponds to the frame member end 171.

[0050] As described above, by designing the solar cell panel 1000 to satisfy the positional relationship between the sealing member joint 161 and the frame member end 171, the deterioration of the first sealing member 111 can be suppressed, and as a result, the durability of the solar cell panel 1000 can be improved.

[0051] (Embodiment 2) Figure 3 is a cross-sectional view showing the schematic configuration of the solar cell panel 2000 in Embodiment 2. Figure 4 is an enlarged cross-sectional view of region Z2 in the solar cell panel of Figure 3. Note that the cross-sectional views shown in Figures 3 and 4 show the cross-section obtained by cutting the solar cell panel 2000 in the thickness direction of the solar cell panel 2000. Therefore, the cross-sectional views shown in Figures 3 and 4 show the configuration of the solar cell panel 2000 in a cross-sectional view in the thickness direction of the solar cell panel 2000. Descriptions that overlap with Embodiment 1 described above are omitted as appropriate.

[0052] The solar cell panel 2000 in Embodiment 2 includes a frame member 200, a first sealing member 210, a first substrate 220, a second substrate 230, and a solar cell module 270 including a solar cell 240 and an adsorption member 260.

[0053] As described above, the solar cell panel 2000 in Embodiment 2 includes an adsorption member 260. Here, in this specification, the adsorption member includes an adsorbent that adsorbs specific chemical substances by chemical adsorption, physical adsorption, etc. The type of adsorbent is not particularly limited, and one suitable may be selected depending on the materials used in the solar cell and the configuration of the solar cell panel. Furthermore, the form of the adsorption member may be a solid, a slurry containing powder and liquid, a semi-solid gel, etc. One of these forms may be selected based on the solar cell panel, the assumed gas type, the gas adsorption rate, etc.

[0054] For example, to remove water and oxygen that have entered the solar panel from the outside, the adsorption member may include an adsorbent that adsorbs and immobilizes water and oxygen.

[0055] Examples of materials used as water adsorbents include phosphorus pentoxide, calcium oxide, barium oxide, magnesium perchlorate, calcium sulfate, calcium carbonate, silica gel, activated carbon, and zeolite.

[0056] Examples of materials used as oxygen adsorbents include BaO, CaO, alkali metals, alkaline earth metals, or oxidizing metals and alloys such as iron, copper, zinc, and barium.

[0057] Furthermore, the material may include components intended to adsorb gaseous substances that may be generated inside the solar panel when it degrades. Perovskite materials contain halogen elements and organic components. Therefore, they can generate harmful halogen gases, organic gases, and other gases that degrade the components when exposed to water, oxygen, light, or heat.

[0058] The halogen gas mentioned above refers to a gas containing at least one selected from the group of halogen-based gases, which consist of F2, Cl2, Br2, I2, and compounds that can be hydrolyzed to produce hydrogen halide or hypohalous acid.

[0059] Examples of materials used as halogen gas adsorbents include sodium hydroxide, magnesium hydroxide, potassium hydroxide, calcium hydroxide, sodium sesquicarbonate (Na2CO3・NaHCO3・2H2O), sodium thiosulfate, sodium aluminate, and potassium oxide.

[0060] Furthermore, the aforementioned organic gas is a gas containing organic components that have been desorbed from inside the solar cell panel, and includes solvent components desorbed from the perovskite film, as well as decomposition products of polymers inside the solar cell panel.

[0061] Examples of materials used as adsorbents for organic gases include silica gel, activated carbon, and porous materials such as zeolites.

[0062] The above-mentioned selection criteria for adsorbents and the materials that can be selected are merely examples, and the configuration of the adsorbent members is not particularly limited. A suitable material can be appropriately selected based on the materials and structure of the solar panel.

[0063] The first substrate 220 and the second substrate 230 are arranged facing each other. The first sealing member 210 is located between the first substrate 220 and the second substrate 230 and is positioned at the ends of the first substrate 220 and the second substrate 230. In the solar cell module 270, a sealed space 250 is formed as a sealed space surrounded by the first substrate 220, the second substrate 230, and the first sealing member 210 arranged in this manner.

[0064] A portion of the first sealing member 210 is in contact with the first substrate 220 and the second substrate 230. The solar cell 240 and the adsorption member 260 are placed in the sealing space 250.

[0065] Figure 4 is an enlarged cross-sectional view of region Z2 in the solar cell panel of Figure 3. As shown in Figure 4, the vicinity 2001 of the frame member of the solar cell panel 2000 comprises a frame member 201, a first sealing member 211, a first substrate 221, a second substrate 231, a solar cell 241, and an adsorption member 291. The sealing space 251 is a space formed by being surrounded by the first substrate 221, the second substrate 231, and the first sealing member 211. The frame member end 271 corresponds to end A of the frame member 201 located closer to the solar cell 241. The sealing member joint 261, where the first sealing member 211, the second substrate 231, and the sealing space 251 are in contact, corresponds to end B of the first sealing member 211 located further from the solar cell 241.

[0066] Furthermore, the angle 281 formed by the line segment connecting the frame member end 271 (i.e., end A) and the sealing member joint 261 (i.e., end B) and the line segment perpendicular to the first substrate 221 is greater than the Brewster angle.

[0067] Furthermore, the suction member 291 is located closer to the end of the first substrate 221 than to the end of the frame member 271.

[0068] Furthermore, the suction member 291 is located on the line segment connecting the sealing member joint portion 261 and the frame member end portion 271.

[0069] With the above configuration, the incidence of sunlight on the first sealing member 211 is suppressed, and the photodegradation and thermal degradation of the first sealing member 211 are reduced, thereby improving the durability of the solar cell panel 2000. Therefore, by applying the solar cell panel 2000 in Embodiment 2 to, for example, a building-integrated solar cell, a building-integrated solar cell with excellent durability can be realized. In addition, the adsorption member 291 removes factors that cause degradation of the building-integrated solar cell. Furthermore, since the adsorption member 291 further suppresses sunlight irradiation to the first sealing member, the durability of the building-integrated solar cell is improved.

[0070] The adsorption member 291 may or may not be in contact with the first substrate 221 and the second substrate 231. For example, in Figure 4, the sealing space 251 is filled with an internal filler, and the adsorption member 291 is not in direct contact with the first substrate 221 and the second substrate 231. Alternatively, the adsorption member 291 may be in contact with each other and the internal filler. With this configuration, the area on which the first substrate 221 and the second substrate 231 are bonded via the internal filler increases, thereby improving the rigidity of the panel. Alternatively, the sealing space 251 may be filled with an internal filler, and the adsorption member 291 may be in contact with the first substrate 221 and / or the second substrate 231. With this configuration, a structure can be created in which light is less likely to hit the adsorption member 291.

[0071] The internal filler may include the materials listed in Embodiment 1. A structure in which such a sealing space 251 is filled with an internal filler can be obtained, for example, by preparing a sheet of internal filler, stacking it between the first substrate 221 and the second substrate 231, and heating it. The adsorption member 291 can be embedded between the divided sheets of internal filler to form a structure like that shown in Figure 4. Alternatively, it can be formed by coating the substrate with internal filler, then placing the adsorption member on the coated surface of the internal filler, further coating the substrate with internal filler, and then stacking the opposing substrates.

[0072] By filling a portion of the sealing space 251 with an internal filler, the mechanical strength of the solar cell panel 2000 is improved, and a scattering prevention effect can be added even if it is damaged. Therefore, the safety of the solar cell panel 2000 is improved.

[0073] Furthermore, a material having a different refractive index from the internal filler may be embedded in the internal filler located between the second substrate 231 and the solar cell 241. This makes it possible to improve the design flexibility of the solar panel 2000 through coloring and light scattering without impairing the power generation efficiency of the solar cell.

[0074] Furthermore, at least a portion of the adsorption member 291 may be in direct contact with at least one of the first substrate 221 and the second substrate 231. Methods for forming the adsorption member 291 on the substrate may include general coating processes or attaching a pre-formed sheet.

[0075] (Embodiment 3) Figure 5 is a cross-sectional view showing the schematic configuration of the solar cell panel 3000 in Embodiment 3. Figure 6 is an enlarged cross-sectional view of region Z3 in the solar cell panel of Figure 5. Note that the cross-sectional views shown in Figures 5 and 6 show the cross-section obtained by cutting the solar cell panel 3000 in the thickness direction of the solar cell panel 3000. Therefore, the cross-sectional views shown in Figures 5 and 6 show the configuration of the solar cell panel 3000 in a cross-sectional view in the thickness direction of the solar cell panel 3000. Descriptions that overlap with Embodiments 1 and 2 described above are omitted as appropriate.

[0076] The solar cell panel 3000 in Embodiment 3 includes a frame member 300, a first sealing member 310, a first substrate 320, a second substrate 330, a solar cell 340, and an adsorption member 360, comprising a solar cell module 370.

[0077] The first substrate 320 and the second substrate 330 are arranged facing each other. The first sealing member 310 is located between the first substrate 320 and the second substrate 330, and is positioned at the ends of both the first substrate 320 and the second substrate 330. In the solar cell module 370, a sealed space 350 is formed as a sealed space surrounded by the first substrate 320, the second substrate 330, and the first sealing member 310 arranged in this manner.

[0078] A portion of the first sealing member 310 is in contact with the first substrate 320 and the second substrate 330. The solar cell 340 and the adsorption member 360 are placed in the sealing space 350.

[0079] Figure 6 is an enlarged cross-sectional view of region Z3 in the solar cell panel of Figure 5. As shown in Figure 6, the vicinity 3001 of the frame member of the solar cell panel 3000 comprises a frame member 301, a first sealing member 311, a first substrate 321, a second substrate 331, a solar cell 341, and an adsorption member 391. The sealing space 351 is a space formed by being surrounded by the first substrate 321, the second substrate 331, and the first sealing member 311. The frame member end 371 corresponds to end A of the frame member 301 located closer to the solar cell 341. The sealing member joint 361, where the first sealing member 311, the second substrate 331, and the sealing space 351 are in contact, corresponds to end B of the first sealing member 311 located further away from the solar cell 341.

[0080] Furthermore, the angle 381 formed by the line segment connecting the frame member end 371 (i.e., end A) and the sealing member joint 361 (i.e., end B) and the line segment perpendicular to the first substrate 321 is greater than the Brewster angle.

[0081] Furthermore, a portion of the suction member 391 is located closer to the center of the first substrate 321 than the end portion 371 of the frame member.

[0082] Furthermore, the suction member 391 is located on the line segment connecting the sealing member joint 361 and the frame member end 371.

[0083] With the above configuration, the incidence of sunlight on the first sealing member 311 is suppressed, and the photodegradation and thermal degradation of the first sealing member 311 are reduced, thereby improving the durability of the solar cell panel 3000. Therefore, by applying the solar cell panel 3000 in Embodiment 3 to, for example, a building-integrated solar cell, a building-integrated solar cell with excellent durability can be realized. In addition, the adsorption member 391 removes factors that cause degradation of the building-integrated solar cell. Furthermore, sunlight is blocked by the adsorption member 391, and sunlight irradiation to the first sealing member is further suppressed, thus improving the durability of the building-integrated solar cell.

[0084] (Embodiment 4) Figure 7 is a cross-sectional view showing the schematic configuration of the solar cell panel 4000 in Embodiment 4. Figure 8 is an enlarged cross-sectional view of region Z4 in the solar cell panel of Figure 7. Note that the cross-sectional views shown in Figures 7 and 8 show the cross-section obtained by cutting the solar cell panel 4000 in the thickness direction of the solar cell panel 4000. Therefore, the cross-sectional views shown in Figures 7 and 8 show the configuration of the solar cell panel 4000 in a cross-sectional view in the thickness direction of the solar cell panel 4000. Descriptions that overlap with Embodiments 1, 2 and 3 described above are omitted as appropriate.

[0085] The solar cell panel 4000 in Embodiment 4 includes a frame member 400, a first sealing member 410, a first substrate 420, a second substrate 430, a solar cell 440, and an adsorption member 460, comprising a solar cell module 470.

[0086] The first substrate 420 and the second substrate 430 are arranged facing each other. The first sealing member 410 is located between the first substrate 420 and the second substrate 430, and is positioned at the ends of the first substrate 420 and the second substrate 430. In the solar cell module 470, a sealed space 450 is formed as a sealed space surrounded by the first substrate 420, the second substrate 430, and the first sealing member 410 arranged in this manner.

[0087] A portion of the first sealing member 410 is in contact with the first substrate 420 and the second substrate 430. The solar cell 440 and the adsorption member 460 are placed in the sealing space 450.

[0088] Figure 8 is an enlarged cross-sectional view of region Z4 in the solar cell panel of Figure 7. As shown in Figure 8, the vicinity 4001 of the frame member of the solar cell panel 4000 comprises a frame member 401, a first sealing member 411, a first substrate 421, a second substrate 431, a solar cell 441, and an adsorption member 491. The sealing space 451 is a space formed by being surrounded by the first substrate 421, the second substrate 431, and the first sealing member 411. The frame member end 471 corresponds to end A of the frame member 401 located closer to the solar cell 441. The sealing member joint 461 where the first sealing member 411, the second substrate 431, and the sealing space 451 are in contact corresponds to end B of the first sealing member 411 located further away from the solar cell 441.

[0089] Furthermore, the angle 481 formed by the line segment connecting the frame member end 471 (i.e., end A) and the sealing member joint 461 (i.e., end B) and the line perpendicular to the first substrate 421 is greater than the Brewster angle.

[0090] Furthermore, a portion of the suction member 491 is located closer to the center of the first substrate 421 than the end portion 471 of the frame member.

[0091] Furthermore, the suction member 491 is not located on the line segment connecting the sealing member joint 461 and the frame member end 471.

[0092] With the above configuration, the incidence of sunlight on the first sealing member 411 is suppressed, and the photodegradation and thermal degradation of the first sealing member 411 are reduced, thereby improving the durability of the solar cell panel 4000. Therefore, by applying the solar cell panel 4000 of Embodiment 4 to, for example, a building-integrated solar cell, a building-integrated solar cell with excellent durability can be realized. In addition, the adsorption member 491 eliminates factors that cause degradation of the building-integrated solar cell. Furthermore, by arranging a part of the adsorption member 491 in a position where it can be seen from the outside, the aesthetic appearance can be improved by using the adsorption member 491, and at the same time, the adsorption performance can be improved by light and thermal energy. Therefore, the durability and aesthetic appearance of the building-integrated solar cell can be improved.

[0093] As shown in Figure 8, the adsorption member 491 is positioned in a location where it is easily irradiated by sunlight. Among the adsorbents contained in the adsorption member 491, some adsorption is promoted by external energy in those that adsorb target substances through chemical reactions. In this case, the configuration in Figure 8 improves the adsorption performance of the adsorption member 491, and gas species that cause degradation of building-integrated solar cells can be fixed more efficiently.

[0094] (Embodiment 5) Figure 9 is a cross-sectional view showing the schematic configuration of the solar cell panel 5000 in Embodiment 5. Figure 10 is an enlarged cross-sectional view of region Z5 in the solar cell panel of Figure 9. Note that the cross-sectional views shown in Figures 9 and 10 show the cross-section obtained by cutting the solar cell panel 5000 in the thickness direction of the solar cell panel 5000. Therefore, the cross-sectional views shown in Figures 9 and 10 show the configuration of the solar cell panel 5000 in a cross-sectional view in the thickness direction of the solar cell panel 5000. Descriptions that overlap with Embodiments 1, 2, 3, and 4 described above are omitted as appropriate.

[0095] The solar cell panel 5000 in Embodiment 5 includes a frame member 500 and a solar cell module 570 which includes a first sealing member 510, a first substrate 520, a second substrate 530, a solar cell 540, and an adsorption member 560.

[0096] The first substrate 520 and the second substrate 530 are arranged facing each other. The first sealing member 510 is located between the first substrate 520 and the second substrate 530, and is positioned at the ends of the first substrate 520 and the second substrate 530. In the solar cell module 570, a sealed space 550 is formed as a sealed space surrounded by the first substrate 520, the second substrate 530, and the first sealing member 510 arranged in this manner.

[0097] A portion of the first sealing member 510 is in contact with the first substrate 520 and the second substrate 530. The solar cell 540 and the adsorption member 560 are placed in the sealing space 550.

[0098] Figure 10 is an enlarged cross-sectional view of region Z5 in the solar cell panel of Figure 9. As shown in Figure 10, the vicinity 5001 of the frame member of the solar cell panel 5000 comprises a frame member 501, a first sealing member 511, a first substrate 521, a second substrate 531, a solar cell 541, and an adsorption member 591. The sealing space 551 is a space formed by being surrounded by the first substrate 521, the second substrate 531, and the first sealing member 511. The frame member end 571 corresponds to end A of the frame member 501 located closer to the solar cell 541. The sealing member joint 561, where the first sealing member 511, the second substrate 531, and the sealing space 551 are in contact, corresponds to end B of the first sealing member 511 located further from the solar cell 541.

[0099] Furthermore, the angle 581 formed by the line segment connecting the frame member end 571 (i.e., end A) and the sealing member joint 561 (i.e., end B) and the line segment perpendicular to the first substrate 521 is greater than the Brewster angle.

[0100] Furthermore, the suction member 591 is located closer to the end of the first substrate 221 than to the end of the frame member 571.

[0101] Furthermore, the suction member 591 is not located on the line segment connecting the sealing member joint 561 and the frame member end 571.

[0102] With the above configuration, the incidence of sunlight on the first sealing member 511 is suppressed, and the photodegradation and thermal degradation of the first sealing member 511 are reduced, thereby improving the durability of the solar cell panel 5000. Therefore, by applying the solar cell panel 5000 in Embodiment 5 to, for example, a building-integrated solar cell, a building-integrated solar cell with excellent durability can be realized. In addition, the adsorption member 591 removes degradation factors of the building-integrated solar cell, improving its durability. Furthermore, by positioning the adsorption member 591 in a location where it is less likely to be irradiated by sunlight, the detachment of degradation-causing substances once adsorbed can be prevented. Therefore, the durability of the building-integrated solar cell can be improved.

[0103] (Embodiment 6) Figure 11 is a cross-sectional view showing the schematic configuration of the solar cell panel 6000 in Embodiment 6. Figure 12 is an enlarged cross-sectional view of region Z6 in the solar cell panel of Figure 11. Note that the cross-sectional views shown in Figures 11 and 12 show the cross-section obtained by cutting the solar cell panel 6000 in the thickness direction of the solar cell panel 6000. Therefore, the cross-sectional views shown in Figures 11 and 12 show the configuration of the solar cell panel 6000 in a cross-sectional view in the thickness direction of the solar cell panel 6000. Descriptions that overlap with Embodiments 1, 2, 3, 4, and 5 described above will be omitted as appropriate.

[0104] The solar cell panel 6000 in Embodiment 6 comprises a frame member 600 and a solar cell module 660 including a first sealing member 611, a second sealing member 612, a third sealing member 613, a first substrate 620, a second substrate 630, and a solar cell 640.

[0105] The first substrate 620 and the second substrate 630 are arranged facing each other. The first sealing member 611 is located between the first substrate 620 and the second substrate 630, and is positioned at the ends of the first substrate 620 and the second substrate 630. The second sealing member 612 is located at the ends of the first substrate 620 and the second substrate 630, between the first substrate 620 and the second substrate 630, and is positioned closer to the center of the first substrate 620 (i.e., closer to the center of the solar cell panel 6000) than the first sealing member 611. The third sealing member 613 is located at the ends of the first substrate 620 and the second substrate 630, between the first substrate 620 and the second substrate 630, and is positioned closer to the center of the first substrate 620 (i.e., closer to the center of the solar cell panel 6000) than the second sealing member 612. In the solar cell module 660, a sealed space 650 is formed as a sealed space surrounded by the first substrate 620, the second substrate 630, and the third sealing member 613 arranged in this manner.

[0106] Figure 12 is an enlarged cross-sectional view of region Z6 in the solar cell panel of Figure 11. As shown in Figure 12, the vicinity 6001 of the frame member of the solar cell panel 6000 comprises a frame member 601, a first sealing member 614, a second sealing member 615, a third sealing member 616, a first substrate 621, a second substrate 631, and a solar cell 641. The sealing space 651 is a space formed by being surrounded by the first substrate 621, the second substrate 631, and the third sealing member 616. The frame member end 671 corresponds to end A of the frame member 601 located closer to the solar cell 641. The first sealing member joint 661, where the first sealing member 614 and the second substrate 631 are in contact, corresponds to end B of the first sealing member 614 located further away from the solar cell 641. The second sealing member joint 662, where the second sealing member 615 and the second substrate 631 are in contact, corresponds to the end C of the second sealing member 615 located on the side furthest from the solar cell 641. The third sealing member joint 663, where the third sealing member 616 and the second substrate 631 are in contact, corresponds to the end D of the third sealing member 616 located on the side furthest from the solar cell 641.

[0107] Furthermore, the angle 681 formed by the line segment connecting the frame member end 671 (i.e., end A) and the first sealing member joint 661 (i.e., end B) and the line segment perpendicular to the first substrate 621 is greater than the Brewster angle. With this configuration, the incidence of sunlight on the first sealing member 614 is suppressed, and the photodegradation and thermal degradation of the first sealing member 614 are reduced, thereby improving the durability of the solar cell panel 6000.

[0108] Furthermore, the angle 682 formed by the line segment connecting the frame member end 671 (i.e., end A) and the second sealing member joint 662 (i.e., end C) and the line segment perpendicular to the first substrate 621 is greater than the Brewster angle. With this configuration, the incidence of sunlight on the second sealing member 615 is suppressed, and the photodegradation and thermal degradation of the second sealing member 615 are reduced, thereby further improving the durability of the solar cell panel 6000.

[0109] Furthermore, the angle 683 formed by the line segment connecting the frame member end 671 (i.e., end A) and the third sealing member joint 663 (i.e., end D) and the line segment perpendicular to the first substrate 621 is greater than the Brewster angle. With this configuration, the incidence of sunlight on the third sealing member 616 is suppressed, and the photodegradation and thermal degradation of the third sealing member 616 are reduced, thereby further improving the durability of the solar cell panel 6000.

[0110] The solar cell panel 6000 in Embodiment 6 includes a first sealing member, a second sealing member, and a third sealing member. That is, the ends of the solar cell panel 6000 are sealed with a plurality of sealing members. As a result, the durability of the solar cell panel 6000 can be further improved, and therefore, by applying the solar cell panel 6000 to, for example, a building-integrated solar cell, a building-integrated solar cell with superior durability can be realized.

[0111] Examples of first sealing materials that can be used in the first sealing member 614 include, for example, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and butylenediol-vinyl alcohol copolymer. The first sealing material may contain at least one selected from the group consisting of polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and butylenediol-vinyl alcohol copolymer.

[0112] The first sealing member 614 is made of, for example, an oxygen-impermeable material. Here, an oxygen-impermeable material has an oxygen permeability coefficient of 0.1 cm. 3 mm / m 2- This refers to a material with a temperature of 1 / 20°C or less. The first sealing member 614 may contain the first sealing material as its main component. That is, the first sealing member 614 may contain the first sealing material in a mass ratio of 50% or more (50% by mass or more) of the first sealing member 614 as a whole. The first sealing member 614 may contain the first sealing material in a mass ratio of 70% or more (70% by mass or more) of the first sealing member 614 as a whole. The first sealing member 614 may contain the first sealing material in a mass ratio of 90% or more (90% by mass or more) of the first sealing member 614 as a whole. The first sealing member 614 may consist only of the first sealing material.

[0113] The degree of saponification of polyvinyl alcohol may be 80 mol% or more, 85 mol% or more, 90 mol% or more, 95 mol% or more, 97 mol% or more, or 98 mol% or more. The degree of saponification of polyvinyl alcohol may be 99.5 mol%. The degree of saponification of ethylene-vinyl alcohol copolymer may be 90 mol% or more, 95 mol% or more, 97 mol% or more, or 100 mol%. The ethylene content of ethylene-vinyl alcohol copolymer may be 20 mol% or more, 27 mol% or more, 35 mol% or more, or 44 mol% or more. The degree of saponification of butylenediol-vinyl alcohol copolymer may be 90 mol% or more, 95 mol% or more, 97 mol% or more, or 99 mol% or more. The butylenediol content of the butylenediol-vinyl alcohol copolymer may be 20 mol% or more, 27 mol% or more, 35 mol% or more, or 44 mol%.

[0114] The first sealing material may be at least one selected from the group consisting of polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and butylenediol-vinyl alcohol copolymer.

[0115] The first sealing member 614 can be formed by melt coating of polyvinyl alcohol, ethylene-vinyl alcohol copolymer, or butylenediol-vinyl alcohol copolymer, or by coating and drying a solution of polyvinyl alcohol, ethylene-vinyl alcohol copolymer, or butylenediol-vinyl alcohol copolymer.

[0116] The first sealing member 614 may have a function such as an adhesive that bonds the first substrate 621 and the second substrate 631 together.

[0117] Examples of the second sealing material that can be used in the second sealing member 615 and the third sealing material that can be used in the third sealing member 616 are the same as the first sealing material that can be used in the first sealing member 614 described above.

[0118] Furthermore, in the case where the second sealing member 615 is positioned between the first sealing member 614 and the third sealing member 616, as in the solar cell panel 6000 of Embodiment 6, examples of the second sealing material used for the second sealing member 615 include, for example, EVA-based resin (i.e., ethylene-vinyl acetate copolymer) or PO-based resin (i.e., polyolefin).

[0119] The second sealing member 615 may include at least one selected from the group consisting of oxygen absorbers and moisture absorbers. An example of an oxygen absorber may be one of the materials listed as an example of a material used as an oxygen adsorbent in Embodiment 2. An example of a moisture absorber may be one of the materials listed as an example of a material used as a water adsorbent in Embodiment 2.

[0120] The second sealing member 615 may contain a moisture-absorbing material.

[0121] For example, if at least two of the first sealing member 614, the second sealing member 615, and the third sealing member 616 are made of different materials, for instance, one material may be a combination of materials that have higher oxygen sealing properties and lower moisture sealing properties than the other material.

[0122] Furthermore, the outermost first sealing member 614 may be made of a different material than that used for the second sealing member 615 and the third sealing member 616.

[0123] In Embodiment 6, a configuration was described in which three sealing members are provided: a first sealing member 614, a second sealing member 615, and a third sealing member 616. However, it is also possible to provide only two sealing members: the first sealing member 614 and the second sealing member 615.

[0124] Furthermore, when three sealing members are provided, namely the first sealing member 614, the second sealing member 615, and the third sealing member 616, the angle 683 formed by the line segment connecting the frame member end 671 (i.e., end A) and the third sealing member joint 663 (i.e., end D) and the line segment perpendicular to the first substrate 621 may be less than or equal to the Brewster angle.

[0125] (Other Embodiments) (Note) The above description of embodiments discloses the following technologies.

[0126] (Technology 1) A solar panel comprising: a solar cell module; and a frame member for holding the solar cell module, wherein the solar cell module includes: a first substrate having light transmittance; a second substrate disposed opposite to the first substrate; a first sealing member that seals the space between the first substrate and the second substrate at the ends of the first substrate and the second substrate; and solar cells disposed in the space sealed by the first sealing member, wherein the frame member has lower light transmittance than the first substrate; the frame member has a shape that sandwiches the first substrate and the second substrate at least at the ends of the first substrate and the second substrate where the first sealing member is present; and in a cross-sectional view in the thickness direction of the solar panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end B of the first sealing member located further away from the solar cell and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle.

[0127] This can improve the durability of solar panels.

[0128] (Technology 2) The solar cell panel according to Technology 1, wherein the solar cell contains a perovskite compound.

[0129] This will enable the creation of solar panels that are inexpensive to produce and have high power generation efficiency.

[0130] (Technology 3) The solar cell panel according to Technology 1 or 2, further comprising an adsorption member disposed inside the space.

[0131] This can further improve the durability of solar panels.

[0132] (Technical 4) The solar cell panel according to Technical 3, wherein, in a cross-sectional view in the thickness direction of the solar cell panel, at least a portion of the adsorption member is located on the central side of the first substrate than the end A of the frame member.

[0133] This allows for increased design flexibility in solar panels by utilizing adsorbent materials. Furthermore, the adsorbent material may be colored by adding commonly used dyes or pigments. By placing colored adsorbent materials on a portion of the solar panel, both design flexibility and the durability of the solar cells can be improved.

[0134] (Technical 5) The solar cell panel according to Technical 3, wherein, in a cross-sectional view in the thickness direction of the solar cell panel, the adsorption member is located on the end side of the first substrate, rather than on the end A of the frame member.

[0135] This allows us to prevent a decrease in aesthetic appeal when the shape or color scheme of the adsorption member does not match the appearance of the solar panel, by placing the adsorption member in the area where the frame member and the substrate overlap.

[0136] (Technical 6) The solar cell panel according to Technical 4 or 5, wherein, in a cross-sectional view of the solar cell panel in the thickness direction, the adsorption member is located on a line segment connecting the end A of the frame member and the end B of the first sealing member.

[0137] As a result, a portion of the sunlight irradiating the end sealing member is blocked by the adsorption member. Therefore, photodegradation and thermal degradation of the end sealing member can be suppressed, further improving its durability.

[0138] (Technical 7) The solar cell panel according to Technical 4 or 5, wherein, in a cross-sectional view of the solar cell panel in the thickness direction, the adsorption member is not located on the line segment connecting the end A of the frame member and the end B of the first sealing member.

[0139] This allows for greater design flexibility of solar panels by utilizing adsorption materials, and also suppresses light and thermal degradation of the end sealing material, further improving durability.

[0140] (Technical 8) The solar cell module further includes a second sealing member, the second sealing member being positioned between the first and second substrates and on the central side of the first substrate than the first sealing member, in a cross-sectional view in the thickness direction of the solar cell panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end C of the second sealing member located further away from the solar cell and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle, the solar cell panel according to any one of Technical 1 to 7.

[0141] This can further improve the durability of solar panels.

[0142] (Technical 9) The solar cell module further includes a third sealing member, the third sealing member being positioned at the ends of the first and second substrates, between the first and second substrates, and on the central side of the first substrate than the second sealing member, and in a cross-sectional view in the thickness direction of the solar cell panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end D of the third sealing member located further away from the solar cell and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle, the solar cell panel according to Technical 8.

[0143] This can further improve the durability of solar panels.

[0144] The photoelectric conversion device disclosed herein can be used, for example, in a glass building material-integrated perovskite solar cell.

Claims

1. A solar panel comprising: a solar cell module; and a frame member for holding the solar cell module, wherein the solar cell module includes: a first substrate having light transmittance; a second substrate disposed opposite to the first substrate; a first sealing member that seals the space between the first substrate and the second substrate at the ends of the first substrate and the second substrate; and solar cells disposed in the space sealed by the first sealing member, wherein the frame member has lower light transmittance than the first substrate; the frame member has a shape that sandwiches the first substrate and the second substrate at least at the ends of the first substrate and the second substrate where the first sealing member is present; and in a cross-sectional view in the thickness direction of the solar panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cells and the end B of the first sealing member located further away from the solar cells and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle.

2. The solar panel according to claim 1, wherein the solar cell comprises a perovskite compound.

3. The solar cell panel according to claim 1, further comprising an adsorption member disposed inside the space.

4. The solar cell panel according to claim 3, wherein, in a cross-sectional view in the thickness direction of the solar cell panel, at least a portion of the adsorption member is located on the central side of the first substrate than the end A of the frame member.

5. The solar cell panel according to claim 3, wherein, in a cross-sectional view in the thickness direction of the solar cell panel, the adsorption member is located on the end side of the first substrate, rather than on the end A of the frame member.

6. The solar cell panel according to claim 4 or 5, wherein, in a cross-sectional view of the solar cell panel in the thickness direction, the adsorption member is located on a line segment connecting the end A of the frame member and the end B of the first sealing member.

7. The solar cell panel according to claim 4 or 5, wherein, in a cross-sectional view of the solar cell panel in the thickness direction, the adsorption member is not located on the line segment connecting the end A of the frame member and the end B of the first sealing member.

8. The solar cell module further includes a second sealing member, the second sealing member being positioned between the first and second substrates and on the central side of the first substrate at the ends of the first and second substrates, and in a cross-sectional view in the thickness direction of the solar cell panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end C of the second sealing member located further away from the solar cell and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle, the solar cell panel according to claim 1.

9. The solar cell module further includes a third sealing member, the third sealing member being positioned at the ends of the first and second substrates, between the first and second substrates, and on the central side of the first substrate than the second sealing member, and in a cross-sectional view in the thickness direction of the solar cell panel, the angle between the line segment connecting the end A of the frame member located closer to the solar cell and the end D of the third sealing member located further away from the solar cell and the line segment perpendicular to the main surface of the first substrate is greater than the Brewster angle, the solar cell panel according to claim 8.

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