Solar cell module

Abstract

The present invention provides a solar cell module that can enhance gas barrier properties while suppressing an increase in the sealing area. [Solution] The solar cell module 100 comprises a conductive layer 2 disposed on a substrate 1, a perovskite solar cell element 3 disposed on the conductive layer 2, an electrode 4 disposed on the perovskite solar cell element 3, a glass plate 6 covering at least the perovskite solar cell element 3 and the electrode 4, and a sealing material 5 that seals the space between the glass plate 6 and the conductive layer 2 inside the outer peripheral edge of the glass plate 6, wherein the glass plate 6 is flexible so that it approaches the conductive layer 2 as it moves towards the outer peripheral edge.

Description

Technical Field

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

Background Art

[0002] A solar cell module having a perovskite solar cell element that converts solar light energy into electrical energy has attracted attention because it has a high energy conversion efficiency and is lightweight compared to other solar cell modules. However, the perovskite solar cell element has a problem of being easily deteriorated by oxygen, water, etc., and various technologies for these problems have been proposed (see, for example, Non-Patent Document 1 or Patent Document 1).

[0003] Non-Patent Document 1 describes a solar cell module with enhanced gas barrier properties by covering the perovskite solar cell element with glass. A sealing material is disposed between the glass and the perovskite solar cell element, and the perovskite solar cell element etc. are sealed by the sealing material by thermocompression bonding through the glass.

[0004] Patent Document 1 describes a solar cell module including a perovskite solar cell element provided on a conductive layer, an adhesive layer covering the perovskite solar cell element, and a sealing material layer covering the adhesive layer to prevent the intrusion of water, oxygen, etc. The sealing material layer is adhered to the conductive layer by a sealing portion disposed across its outer peripheral end and the conductive layer, whereby the perovskite solar cell element is sealed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Non-Patent Documents

[0006]

Non-Patent Document 1

[0007] As described in Non-Patent Document 1, when a sealant is heat-pressed onto glass, some of the sealant may protrude from the outer edge of the glass due to the pressing process. As a result, the sealed area increases by the area of ​​the protruding sealant, reducing the power generation efficiency per unit area of ​​the solar cell module. Furthermore, if some of the sealant protrudes, there is a risk of contaminating the sealing equipment, etc.

[0008] In the solar cell module described in Patent Document 1, the sealing portion is arranged across the outer edge of the sealing material layer and the conductive layer, which increases the sealing area and reduces the power generation efficiency per unit area of ​​the solar cell module.

[0009] The present invention has been made in view of the above-mentioned problems, and its objective is to provide a solar cell module that can suppress an increase in the sealing area while improving gas barrier properties. [Means for solving the problem]

[0010] The characteristic configuration of the solar cell module according to the present invention is that it comprises a conductive layer disposed on a substrate, a perovskite solar cell element disposed on the conductive layer, an electrode disposed on the perovskite solar cell element, a glass plate covering at least the perovskite solar cell element and the electrode, and a sealing material that seals the space between the glass plate and the conductive layer inside the outer peripheral edge of the glass plate, wherein the glass plate is curved so that it approaches the conductive layer as it approaches the outer peripheral edge.

[0011] In this configuration, the glass plate covering the perovskite solar cell elements and electrodes is curved so that it approaches the conductive layer as it moves towards its outer edge. This shortens the distance between the outer edge of the glass plate and the conductive layer, narrowing the opening of the perovskite solar cell elements. Furthermore, since the sealing material seals the space between the glass plate and the conductive layer inside the outer edge of the glass plate, the sealing material does not protrude beyond the outer edge of the glass plate, and the sealing area of ​​the solar cell module does not increase. As a result, the gas barrier glass plate can suppress contact between the perovskite solar cell elements and the sealing material and the atmosphere, thereby improving their durability. Thus, this solar cell module is capable of enhancing gas barrier properties while suppressing an increase in the sealing area. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic diagram showing the configuration of a solar cell module according to the first embodiment. [Figure 2] This is a schematic plan view of a solar cell module according to the first embodiment. [Figure 3] This is a diagram showing a method for manufacturing solar cell modules. [Figure 4] This is a schematic diagram showing the configuration of a solar cell module according to the second embodiment. [Figure 5] This is a schematic diagram showing the configuration of a solar cell module according to the third embodiment. [Modes for carrying out the invention]

[0013] [First Embodiment] An embodiment of the solar cell module 100 according to the first embodiment will be described below with reference to the drawings. However, the invention is not limited to the following embodiment, and various modifications are possible without departing from the spirit of the invention.

[0014] [Outline configuration of a solar cell module] As shown in FIG. 1, the solar cell module 100 includes a solar cell 10, a sealing material 5, and a glass plate 6. The solar cell 10 is formed by laminating a substrate 1, a conductive layer 2, a perovskite solar cell element 3, and an electrode 4 in this order. In FIG. 1, only one solar cell 10 is illustrated, but the solar cell module 100 may have a plurality of solar cells 10.

[0015] 〔Substrate〕 The substrate 1 functions as a support for the perovskite solar cell element 3 and the electrode 4. The substrate 1 is a transparent glass substrate, a translucent glass substrate, a transparent resin substrate, etc., and has insulating properties. The substrate 1 is rectangular when viewed along the Z direction.

[0016] As shown in FIG. 1, a conductive conductive layer 2 is laminated on the substrate 1. Although the orientation during use of the solar cell module 100 is not particularly limited, it is preferably used such that light is incident from the surface on the Z2 side of the substrate 1. Hereinafter, the direction from the substrate 1 toward the conductive layer 2 is referred to as the "Z1 direction" (an example of the lamination direction), the opposite direction is referred to as the "Z2 direction", and the Z1 direction and the Z2 direction are collectively referred to as the "Z direction". Also, one of the directions orthogonal to the Z direction is referred to as the "X direction", and the direction orthogonal to the Z direction and the X direction is referred to as the "Y direction" (see FIG. 2). Note that FIG. 2 is a view of the solar cell module 100 shown in FIG. 1 viewed along the Z2 direction.

[0017] 〔Conductive layer〕 The conductive layer 2 is formed on the surface on the Z1 side of the substrate 1 by CVD (chemical vapor deposition), sputtering, or the like. In the present embodiment, the conductive layer 2 is formed over the entire surface on the Z1 side of the substrate 1. The conductive layer 2 contains, for example, fluorine-doped tin oxide (FTO), tin oxide (TO), indium tin oxide (ITO), zinc oxide (ZnO), aluminum-doped zinc oxide (AZO), etc. as materials. The perovskite solar cell element 3 is disposed (laminated) on the conductive layer 2 (the surface on the Z1 side).

[0018] 〔Perovskite solar cell element〕 The perovskite solar cell element 3 converts light energy into electrical energy. The perovskite solar cell element 3 has an electron transport layer 31, a photoelectric conversion layer 32, and a hole transport layer 33, and the electron transport layer 31, the photoelectric conversion layer 32, and the hole transport layer 33 are arranged in this order along the Z1 direction. When viewed along the Z direction, each of the electron transport layer 31, the photoelectric conversion layer 32, and the hole transport layer 33 is rectangular, and in the present embodiment, when viewed along the Z direction, the sizes (areas) of each of the electron transport layer 31, the photoelectric conversion layer 32, and the hole transport layer 33 are equal.

[0019] The electron transport layer 31 is disposed on the surface of the conductive layer 2 on the Z1 side. The electron transport layer 31 allows electrons received from the photoelectric conversion layer 32 described later to pass through (transport electrons). The electron transport layer 31 contains, for example, a metal oxide such as titanium oxide, tin oxide, zinc oxide, etc. as a material. In the present embodiment, the electron transport layer 31 includes an insulating layer 311 that extends into a recess 21 formed by removing a part of the conductive layer 2. The insulating layer 311 divides the conductive layer 2 with which the perovskite solar cell element 3 is in contact into two along the X direction. Electrons can move in the electron transport layer 31 in the direction along the Z direction, but it is difficult for them to move in the directions orthogonal to the Z direction (the X direction and the Y direction), and the movement between the two sections of the conductive layer 2 corresponding to each perovskite solar cell element 3 is restricted. Note that the electron transport layer 31 may sometimes be referred to as a "blocking layer".

[0020] Since the substrate 1, the conductive layer 2, and the electron transport layer 31 have light transmissivity, light such as sunlight and indoor light is guided to the photoelectric conversion layer 32 without being substantially absorbed (or without being absorbed) by the substrate 1, the conductive layer 2, and the electron transport layer 31.

[0021] The photoelectric conversion layer 32 absorbs light energy and converts it into electrical energy. Specifically, the photoelectric conversion layer 32 absorbs light and moves excited electrons and holes to perform photoelectric conversion. The photoelectric conversion layer 32 includes a perovskite layer composed of a perovskite compound. Further, the photoelectric conversion layer 32 further includes a porous semiconductor oxide layer (for example, a porous titanium layer).

[0022] The hole transport layer 33 is through which holes received from the photoelectric conversion layer 32 pass (transports holes). The hole transport layer 33 contains, for example, an organic compound such as chlorobenzene as a material. An electrode 4 is placed on the hole transport layer 33 (on the Z1 side).

[0023] Electrode 4 is conductive and functions as a positive electrode. As shown in Figure 1, electrode 4 is positioned on the Z1-side surface (partial region) of the conductive layer 2, via each side of the perovskite solar cell element 3, along the Z direction from the Z1-side surface of the hole transport layer 33. Electrode 4 may be made from materials such as graphite, carbon black, carbon nanotubes, carbon nanofibers, carbon fibers, graphene, or fullerene. Alternatively, electrode 4 may be formed from elemental metals such as gold, platinum, silver, or copper, or alloys thereof, or oxide conductors such as FTO or indium tin oxide (ITO).

[0024] As described above, a laminate consisting of a single perovskite solar cell element 3 and an electrode 4 stacked on a conductive layer 2 of a substrate 1 is referred to as a solar cell 10. A solar cell module 100 is formed by electrically connecting multiple solar cells 10.

[0025] Light, such as sunlight, enters the solar cell module 100 from the Z2 side of the substrate 1. The light reaches the photoelectric conversion layer 32 via the substrate 1, the conductive layer 2, and the electron transport layer 31. The photoelectric conversion layer 32 absorbs the light, resulting in the generation of electrons and holes. Electrons generated in the photoelectric conversion layer 32 move to the conductive layer 2 (negative electrode) via the electron transport layer 31. Simultaneously, holes generated in the photoelectric conversion layer 32 move to the electrode 4 (positive electrode), which is electrically connected to the hole transport layer 33. When a load (not shown) is connected between the conductive layer 2 and the electrode 4, the holes combine with electrons that have passed through the load. As a result, electricity is generated. While electrons moving through the electron transport layer 31 move smoothly along the Z2 direction to reach the conductive layer 2, their movement in the direction perpendicular to the Z direction is restricted by the insulating layer 311, as described above. In other words, the solar cell module 100 is configured to prevent short circuits.

[0026] [Sealing material] As shown in Figures 1 and 2, the solar cell 10 is sealed with a encapsulant 5. This shields the perovskite solar cell element 3 and electrode 4 from the atmosphere, improving the durability of the solar cell module 100. The encapsulant 5 may have a getter material that adsorbs moisture and gas, such as an olefin-based adhesive, epoxy-based adhesive, or acrylic-based adhesive. The encapsulant 5 may also have waterproof and gas barrier properties.

[0027] As shown in Figures 1 and 2, the area of ​​the encapsulant 5 in a plan view is larger than the area of ​​the solar cell 10. The encapsulant 5 adheres closely to the perovskite solar cell element 3 and electrode 4, covering their entire surfaces and protecting them from water, oxygen, and other elements in the atmosphere.

[0028] [Glass plate] As shown in Figures 1 and 2, a glass plate 6 is positioned on the Z1 side of the encapsulant 5. In plan view, the area of ​​the glass plate 6 is larger than the area of ​​the solar cell 10 and the encapsulant 5, and the glass plate 6 covers the entire solar cell 10 and the encapsulant 5. For this reason, the encapsulant 5 is located inside the outer edge of the glass plate 6 and seals the space between the glass plate 6 and the conductive layer 2. Because the encapsulant 5 is located inside the outer edge of the glass plate 6, the sealing area of ​​the solar cell module 100 can be made equal to the area of ​​the glass plate 6, so the sealing area does not increase due to overflow of the encapsulant 5, etc.

[0029] As shown in Figure 1, the glass plate 6 is bent so that it approaches the conductive layer 2 as it moves towards the outer edge of the glass plate 6, outside the contact area with the sealant 5. Therefore, at the outer edge of the glass plate 6, the distance between the glass plate 6 and the conductive layer 2 in the Z direction becomes smaller, which narrows the opening of the solar cells 10 and the sealant 5. This reduces contact between the solar cells 10 and the sealant 5 inside the outer edge of the glass plate 6 and the atmosphere, thereby suppressing their degradation and extending the lifespan of the solar cell module 100.

[0030] The distance between the outer edge of the glass plate 6 and the outer edge of the sealant 5 in the X or Y direction can be arbitrarily determined. However, if it is too small, the glass plate 6 cannot bend sufficiently, making it impossible to narrow the distance between the outer edge of the glass plate 6 and the conductive layer 2 in the Z direction. If it is too large, the sealing area will increase. Therefore, it is best to set the distance to one that allows the glass plate 6 to bend (for example, 150 μm or more). The outer edge of the glass plate 6 and the conductive layer 2 may be in contact.

[0031] The thickness of the glass plate 6 is preferably between 20 μm and 100 μm, and more preferably between 30 μm and 100 μm. Because glass with such a thin thickness is lightweight, the solar cell module 100 can be made lighter without increasing its volume. Furthermore, because glass with such a thin thickness is highly flexible, the glass plate 6 can be easily bent. Moreover, because glass with such a thickness is high strength, even if tensile stress or the like is applied to the glass plate 6 due to the difference in the coefficient of thermal expansion between the glass plate 6 and the sealant 5, the occurrence of cracks and the like can be suppressed. For this reason, there is no need to provide a stress-relieving layer between the glass plate 6 and the sealant 5 to relieve stress, and the structure of the solar cell module 100 can be simplified.

[0032] Furthermore, by using a light-transmitting glass plate 6 instead of the Al-PET film or the like that was conventionally used to provide gas barrier properties to the solar cell module 100, the entire solar cell module 100 can be made transparent. This makes it possible to use multiple solar cell modules 100 stacked on top of each other, thereby increasing the power generation efficiency per unit area.

[0033] [Method of manufacturing solar cell modules] Next, the manufacturing method of the solar cell module 100 will be explained with reference to Figure 3. The manufacturing method of the solar cell module 100 in this embodiment includes a first step of forming the solar cell 10, a second step of bonding the sealing material 5 to the first surface 6A of the glass plate 6, and a third step of bonding the sealing material 5 bonded to the first surface 6A of the glass plate 6 to the Z1 side surface of the solar cell 10.

[0034] First, a first step is performed to form multiple solar cells 10. In the first step, a conductive layer 2 is formed on the Z1 side of the substrate 1. The conductive layer 2 may be formed by, for example, CVD (chemical vapor deposition) or sputtering. Next, the conductive layer 2 is partially removed by laser scribing to form multiple recesses 21 that divide the conductive layer 2 along the X direction. After that, a solar cell 10 is obtained by forming a perovskite solar cell element 3 and electrodes 4 on the Z1 side of the conductive layer 2 by a known method. After the formation of the electrodes 4, a coating material such as an insulating porous film may be placed on the surface of the electrodes 4 using an adhesive or the like. Note that only one solar cell 10 is shown as an example in Figure 3.

[0035] Next, the second step is performed, and the sealant 5 is bonded to the first surface 6A of the glass plate 6. As mentioned above, it is preferable to use a glass plate 6 with a thickness of 20 μm or more and 100 μm or less. The first surface 6A is the surface facing the Z1 side of the solar cell 10. The sealant 5 should be bonded so that its center coincides with the center of the glass plate 6. The amount of sealant 5 to be bonded to the glass plate 6 is adjusted so that the stretched sealant 5 does not protrude beyond the outer edge of the glass plate 6, taking into account the elongation when the glass plate 6 is pressed in the third step.

[0036] Finally, a third step is performed to bond the sealant 5, which is adhered to the first surface 6A of the glass plate 6, to the solar cell 10. In the third step, for example, a diaphragm pump is used to press the surface of the glass plate 6 opposite to the first surface 6A in the Z2 direction, pressing the sealant 5 to the solar cell 10. At this time, because the glass plate 6 is thin, the portion of the glass plate 6 that is outside the outer edge of the sealant 5 bends due to its own weight and deforms so that it approaches the conductive layer 2 as it moves towards the outer edge of the glass plate 6. In this way, the solar cell module 100 shown in Figure 1 is formed, so that the sealant 5 does not protrude beyond the outer edge of the glass plate 6 during the process of sealing the solar cell 10, and the increase in the sealing area is suppressed. In addition, the sealing equipment, etc., are not contaminated by the overflow of the sealant 5. After the third step, the sealant 5 may be heat-cured or UV-cured.

[0037] [Second Embodiment] A solar cell module 100 according to the second embodiment will be described with reference to Figure 4. In the second embodiment, at least a portion of the outer peripheral edge of the glass plate 6 is in contact with the conductive layer 2, and it has a curved portion 61 that is curved inward from the outer peripheral edge and is convex toward the conductive layer 2. Other embodiments are the same as in the first embodiment, so similar configurations will not be described.

[0038] The curved portion 61 is preferably formed outside the outer edge of the sealing material 5. Because the curved portion 61 is curved convexly toward the conductive layer 2, a force toward the Z2 side acts from the curved portion 61 on the portion of the glass plate 6 that is outside the curved portion 61. As a result, the outer edge of the glass plate 6 can easily come into contact with the conductive layer 2, and the perovskite solar cell element 3 and sealing material 5 can be sealed more reliably. This suppresses the degradation of the perovskite solar cell element 3 and sealing material 5, thereby extending the lifespan of the solar cell module 100.

[0039] In the second embodiment, in the third step of the manufacturing method for the solar cell module 100, even after the glass plate 6 has bent and its outer edge has come into contact with the conductive layer 2, the glass plate 6 should be pressed in the Z2 direction until the curved portion 61 is formed. At this time, if the distance between the outer edge of the sealing material 5 and the outer edge of the glass plate 6 is short in the X and Y directions, it is difficult to form the curved portion 61. Therefore, the area of ​​the glass plate 6 in a plan view should be larger than the area of ​​the sealing material 5 to the extent that the curved portion 61 can be formed. The distance between the outer edge of the sealing material 5 and the outer edge of the glass plate 6 should be, for example, 200 μm or more.

[0040] [Third Embodiment] A solar cell module 100 according to the third embodiment will be described with reference to Figure 5. The solar cell module 100 according to the third embodiment has an insulating layer 7 that covers the solar cell 10. The sealing material 5 is arranged on the conductive layer 2 at a position spaced apart from the solar cell 10 and the insulating layer 7, surrounding their outer edges. Other embodiments are the same as those of the second embodiment, so similar configurations will not be described.

[0041] The insulating layer 7 is placed on the surface of the electrode 4 and is a coating material such as a porous film that has insulating properties, and has the function of protecting the electrode 4. The insulating layer 7 covers the solar cell 10 and is in contact with the glass plate 6 on the Z1 side.

[0042] The sealing material 5 is positioned to seal the space between the glass plate 6 and the conductive layer 2, and is provided between the curved portion 61 and the outer edge of the glass plate 6. In the third embodiment, the sealing material 5 does not cover the top and side surfaces of the perovskite solar cell element 3 and the electrode 4, and its dimensions in the Z direction are small. Therefore, the amount of sealing material 5 used can be reduced. The sealing material 5 is preferably in close contact with the glass plate 6 along the curved portion 61 of the glass plate 6, as shown in Figure 5, but it may have any shape as long as it can seal the space between the glass plate 6 and the conductive layer 2.

[0043] In the third embodiment, in the second step of the manufacturing method for the solar cell module 100, the sealant 5 is not adhered to the first surface 6A of the glass plate 6, but rather to the Z1 side surface of the conductive layer 2. The sealant 5 may be in the form of a tape or a liquid, and may be positioned by pasting or coating. Considering the stretching allowance when pressed, the sealant 5 should be positioned such that when the glass plate 6 is pressed in the third step, the outer edge of the sealant 5 stretched by the pressure is located inside the outer edge of the glass plate 6. Subsequently, in the third step, the glass plate 6 is placed on the solar cell 10, and the curved portion 61 is formed by pressing the glass plate 6 in the Z2 direction even after the glass plate 6 has bent.

[0044] [Other Embodiments] In the first and second embodiments, the distance between the outer edge of the sealing material 5 and the outer edge of the glass plate 6 was, for example, 150 μm or more or 200 μm or more, but it may be less than these dimensions, and the space between the glass plate 6 and the conductive layer 2 may be filled with the sealing material 5. Furthermore, the sealing material 5 may have a shape such that its dimension in the Z direction decreases towards its outer edge. With such a shape, the glass plate 6 can be bent so that it approaches the conductive layer 2 towards its outer edge, regardless of the presence of the sealing material 5. In addition, since the thickness of the sealing material 5 covering the sides of the perovskite solar cell element 3 and electrode 4 can be increased, the solar cell 10 can be sealed more reliably, and the durability of the solar cell module 100 can be improved.

[0045] The configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Furthermore, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto and can be modified as appropriate without departing from the purpose of the present invention.

[0046] In the embodiment described above, the following configuration can be envisioned. (1) A solar cell module 100 comprising: a conductive layer 2 disposed on a substrate 1; a perovskite solar cell element 3 disposed on the conductive layer 2; an electrode 4 disposed on the perovskite solar cell element 3; a glass plate 6 covering at least the perovskite solar cell element 3 and the electrode 4; and a sealing material 5 sealing the space between the glass plate 6 and the conductive layer 2 inside the outer peripheral edge of the glass plate 6, wherein the glass plate 6 is curved so that it approaches the conductive layer 2 as it approaches the outer peripheral edge.

[0047] In this configuration, the glass plate 6 covering the perovskite solar cell element 3 and electrodes 4 is bent so that it approaches the conductive layer 2 as it moves toward its outer edge. This shortens the distance between the outer edge of the glass plate 6 and the conductive layer 2, thereby narrowing the opening of the perovskite solar cell element 3. Furthermore, since the sealing material 5 seals the space between the glass plate 6 and the conductive layer 2 inside the outer edge of the glass plate 6, the sealing material 5 does not protrude beyond the outer edge of the glass plate 6, and the sealing area of ​​the solar cell module 100 does not increase. As a result, the gas barrier glass plate 6 can suppress contact between the perovskite solar cell element 3 and the sealing material 5 and the atmosphere, thereby improving the durability of the solar cell module 100.

[0048] (2) In the solar cell module 100 of (1), the thickness of the glass plate 6 is preferably 20 μm or more and 100 μm or less.

[0049] A glass plate 6 having a thickness of 20 μm to 100 μm is lightweight due to its thinness, and also possesses excellent flexibility and high strength. With this configuration, the weight of the solar cell module 100 can be reduced by using such a glass plate 6. Furthermore, because the glass plate 6 has high flexibility, it is easy to deform the glass plate 6 by its own weight and process the shape of the glass plate 6, without complicating the manufacturing process. In addition, because the glass plate 6 has high strength, it is not necessary to consider the stress generated between the glass plate 6 and other components in contact with the glass plate 6, and a stress-relieving layer to alleviate stress is unnecessary.

[0050] (3) In the solar cell module 100 of (1) or (2), it is preferable that at least a portion of the outer edge of the glass plate 6 is in contact with the conductive layer 2.

[0051] With this configuration, the perovskite solar cell elements 3 and the encapsulant 5 can be sealed with a glass plate 6, thereby further improving the gas barrier properties. The encapsulant 5 has a durable lifespan, and by suppressing contact between the encapsulant 5 and the atmosphere, degradation can be suppressed, thus extending the lifespan of the solar cell module 100.

[0052] In the solar cell module 100 of (4)(3), it is preferable that the glass plate 6 has a curved portion 61 that is curved inward from the outer edge and convex toward the conductive layer 2.

[0053] In this configuration, since the curved portion 61 is formed inward from the outer edge of the glass plate 6, the curved portion 61 causes a force toward the conductive layer 2 on the outer edge of the glass plate 6, making it easier for the outer edge to contact the conductive layer 2, and thus enabling more reliable sealing of the perovskite solar cell element 3 and the encapsulant 5. This suppresses the degradation of the perovskite solar cell element 3 and the encapsulant 5, thereby extending the lifespan of the solar cell module 100. [Industrial applicability]

[0054] The present invention can be used in solar cell modules having perovskite solar cell elements. [Explanation of Symbols]

[0055] 1: Substrate, 2: Conductive layer, 3: Perovskite solar cell element, 4: Electrode, 5: Encapsulating material, 6: Glass plate, 61: Curved section, 100: Solar cell module

Claims

1. A conductive layer placed on a substrate, A perovskite solar cell element disposed on the conductive layer, The electrodes arranged on the perovskite solar cell element, At least the perovskite solar cell element and the glass plate covering the electrode, The glass plate is provided with a sealing material that seals the space between the glass plate and the conductive layer, located inside the outer peripheral edge of the glass plate. The aforementioned glass plate is flexible so that it approaches the conductive layer as it moves toward the outer edge of the solar cell module.

2. The solar cell module according to claim 1, wherein the thickness of the glass plate is 20 μm or more and 100 μm or less.

3. The solar cell module according to claim 1 or 2, wherein at least a portion of the outer peripheral edge of the glass plate is in contact with the conductive layer.

4. The solar cell module according to claim 3, wherein the glass plate has a curved portion that is curved inward from the outer peripheral edge and is convex toward the conductive layer.

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