JP2011029273A - Solar cell module - Google Patents

Abstract

A solar cell module that efficiently increases the amount of light applied to a light receiving surface of a solar cell, thereby improving power generation efficiency.
A solar cell module includes a resin sealing layer in which a plurality of solar cells arranged in a row are sealed with a transparent resin (light-receiving surface side sealing material, solar cell array, back surface). Side sealing material 5), a translucent substrate 1 laminated on the light-receiving surface side of the resin sealing layer, and a back sheet 6 laminated on the back surface side of the resin sealing layer, and adjacent solar cells A refractive layer 11 having a refractive index smaller than that of the light-transmitting substrate 1 and having a convex cross section on the back surface side is formed on the back surface of the light-transmitting substrate 1 in the space between the three.
[Selection] Figure 3

Description

  The present invention relates to a solar cell module having a resin sealing layer in which a plurality of solar cells are sealed with a transparent resin, and a translucent substrate laminated on the light receiving surface side, and in particular, a solar cell. It is related with the structure which improves electric power generation efficiency by using effectively the light which injected into the clearance gap between a photovoltaic cell.

  Polycrystalline silicon solar cells are generally made with a thickness of 0.16 mm to 0.3 mm and are vulnerable to physical impact. Therefore, in order to cause a physical impact to the solar battery cell to interfere, a sealing material is filled up and down the solar battery cell as a laminated structure. Usually, a light receiving surface side sealing material having a thickness of 0.6 mm to 1.0 mm is provided on the light receiving surface side of the solar battery cell, and a back surface side sealing material having a thickness of 0.4 mm to 1.0 mm is provided on the back surface side. A back sheet is further provided on the back side of the back side sealing material in order to maintain insulation. On the other hand, a light transmitting substrate is further provided on the light receiving surface side of the light receiving surface side sealing material.

  The gap between a plurality of solar cells and the solar cells provided side by side generally has a width of 2 mm to 4 mm. The light irradiated to other than the light receiving surface of the solar battery cell passes through this gap, is reflected by the back sheet, hits the translucent substrate, is reflected again, and is applied to the solar battery cell. This light also contributes to power generation.

  However, in general, the light-transmitting substrate and the sealing material have the same refractive index. Therefore, the light that is perpendicularly incident on the translucent substrate into the gap between the solar cells travels straight through the translucent substrate and the sealing agent, reflects off the back sheet, and travels straight again toward the transparent substrate side. Since it returns, it does not go to the light receiving surface of the solar battery cell and does not contribute to power generation.

  On the other hand, conventionally, in order to effectively use the light incident on the gap between the solar battery cell and the solar battery cell, a proposal has been made that the back surface portion of the sealing material on the back surface side of the solar battery cell has an uneven shape ( For example, see Patent Document 1).

JP 2002-43600 A

  According to the said proposal, light is reflected as the unevenness | corrugation used as the N-type with a continuous cross section on the back surface side of a transparent resin material (sealing material), and the light taken in into a photovoltaic cell is increased. However, in this proposed technique, as well as the conventional technique, since the light hits the back side and the side surface of the solar battery cell, there is light that does not contribute to power generation among the light reflected by the unevenness, which is not sufficient for improving the power generation efficiency. There wasn't.

  The present invention has been made to solve the above-described problems, and the solar cell light receiving surface is irradiated by eliminating the light that travels straight out of the light irradiated to the gap between the solar cell and the solar cell. An object of the present invention is to provide a solar cell module capable of increasing the amount of light to be generated and thereby improving the power generation efficiency.

  In order to solve the above-described problems and achieve the object, a solar cell module of the present invention includes a resin sealing layer in which a plurality of solar cells arranged in a row are sealed with a transparent resin, a resin seal In a solar cell module comprising a light-transmitting substrate laminated on the light-receiving surface side of the stop layer and a back sheet laminated on the back surface side of the resin sealing layer, the gap portion between adjacent solar cells is transparent. Between the light-transmitting substrate and the resin sealing layer, a refractive layer that has a refractive index different from that of the light-transmitting substrate or the resin sealing layer and has a cross-section projecting to the back surface side and refracting light incident on the gap portion is formed. It is characterized by that.

  In another solar cell module of the present invention, the refractive layer is an air layer.

  According to the solar cell module of the present invention, between the translucent substrate and the resin sealing layer in the gap portion between the adjacent solar cells, at least one of the translucent substrate and the resin sealing layer Since the refractive index is different and the cross section is convex on the back side, and a refractive layer is formed to refract the light incident on the gap, even the light incident perpendicular to the gap is diffused by the refractive layer and goes straight Light to be reduced. Thereby, the quantity of the light irradiated to a photovoltaic cell light-receiving surface can be increased, and electric power generation efficiency can be improved. Further, since the refractive layer is an air layer, there is an effect that it can be formed at low cost.

FIG. 1 is a perspective view of a main part (laminated body) of a solar cell module according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of a main part of the solar cell module of FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 and shows a path of light irradiated between solar cells. FIG. 4 is a cross-sectional view of a portion corresponding to FIG. 3 of a conventional solar cell module shown for comparison of light paths. FIG. 5 is a cross-sectional view of another example of the air layer (refractive layer) shape of the first embodiment. FIG. 6 is an exploded perspective view of the main part of the solar cell module according to Embodiment 2 of the present invention. FIG. 7 is a cross-sectional view showing a path of light irradiated between solar cells in the second embodiment. FIG. 8 is a cross-sectional view of another example of the transparent hollow tube of the second embodiment. FIG. 9 is an exploded perspective view of essential parts of the solar cell module according to Embodiment 3 of the present invention. FIG. 10 is a cross-sectional view showing a path of light irradiated between solar cells in the third embodiment. FIG. 11 is a cross-sectional view of another example of the shape of the air layer (refractive layer) formed between the translucent substrate and the transparent film.

  Embodiments of a solar cell module according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the main part (laminated body) of the solar cell module according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of a main part of the solar cell module of FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 and shows a path of light irradiated between solar cells. FIG. 4 is a cross-sectional view of a portion corresponding to FIG. 3 of a conventional solar cell module shown for comparison of light paths.

  1 and 2, the laminated body constituting the main part of the solar cell module 50 includes, from the light receiving surface side, a light-transmitting substrate 1 made of a transparent material such as glass and a light receiving surface side sealing material made of a transparent resin. (First resin layer) 2, a plurality of solar cells 3 arranged in a grid pattern, and a solar cell array 7 wired with output lead wires 4 connecting the plurality of solar cells 3 in series, A back surface side sealing material (second resin layer) 5 made of a transparent resin and a back sheet 6 having excellent weather resistance are laminated in this order. The light-receiving surface side sealing material 2 and the back surface side sealing material 5 are integrated by heat treatment, and the solar cell array 7 is resin-sealed to form a resin sealing layer. The solar cell module 50 is manufactured by covering the outer peripheral edge of the laminated body having such a configuration with a frame frame (not shown) over the entire circumference.

  For the translucent substrate 1, a synthetic resin material such as a glass material or a polycarbonate resin is used. Further, as the glass material, white plate glass, tempered glass, heat ray reflective glass or the like is used, and generally white plate tempered glass having a thickness of about 3 mm to 4 mm is often used. On the other hand, a polycarbonate resin having a thickness of about 5 mm is often used.

  The light-receiving surface side sealing material 2 is made of a material having translucency, heat resistance, electrical insulation and flexibility, and thermoplastics mainly composed of ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), or the like. The synthetic resin material is preferable. As the thickness, a sheet form having a thickness of about 0.6 mm to 1.0 mm is used.

  The solar cells 3 are made of single crystal silicon or a polycrystalline silicon substrate having a thickness of about 0.16 mm to 0.3 mm, and are arranged in a grid pattern. A PN junction is formed inside the solar battery cell 3, electrodes are provided on the light receiving surface and the back surface, and an antireflection film is provided on the light receiving surface. As for the size of the solar battery cell 3, the length of one side in the polycrystalline silicon solar battery is about 150 mm to 156 mm.

  The output lead wire 4 is made of a rectangular copper wire having a solder plating thickness of about 0.1 mm to 0.4 mm. The output lead wire 4 is joined to the solar cell 3 by soldering, and electrically connects the back surface side electrode and the light receiving surface side electrode of each solar cell 3. The output lead wire 4 sequentially connects the back surface side electrode and the light receiving surface side electrode of the solar cells 3 arranged in a grid pattern in the longitudinal direction of the solar cell module 50, and at the end portion, the solar cell at the adjacent column end. Connect so that the cells 3 are folded back. In this way, the entire solar cells 3 arranged in a grid pattern are connected in series.

  The back surface side sealing material 5 is made of a material having translucency, heat resistance, electrical insulation and flexibility, like the light receiving surface side sealing material 2, and is made of ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB). A thermoplastic synthetic resin material containing as a main component is suitable. The thickness is about 0.4 mm to 1.0 mm.

  The light-receiving surface side sealing material 2 and the back surface side sealing material 5 are thermally cross-linked in a laminating step under a reduced pressure of about 0.5 atm to 1.0 atm, so that the translucent substrate 1, the solar cell array 7, and the back sheet. 6 and unite by fusing.

  The back sheet 6 is made of a material excellent in moisture permeability, weather resistance, hydrolysis resistance, and insulation, and a fluorine resin sheet, a polyethylene terephthalate (PET) sheet deposited with alumina or silica, or the like is used.

  And in this Embodiment, as shown in FIG. 3, the back surface (the translucent board | substrate 1 and the light-receiving surface side sealing material 2 of the translucent board | substrate 1 of the clearance gap part between adjacent photovoltaic cells 3 and In between, an air layer 11 formed as a hollow portion of a flat triangle whose cross section is convex on the back surface side is provided. The air layer 11 operates as a refractive layer having a refractive index smaller than that of the translucent substrate 1. The air layer 11 extends substantially over the entire length in the longitudinal direction of the solar cell module 50, and is configured to pass through a gap between the plurality of sets of solar cells 3.

  The operation will be described. As shown in FIG. 4, in the conventional solar cell module, the air layer 11 is not provided. Further, as described above, the refractive indexes of the translucent substrate 1 and the light receiving surface side sealing material 2 are equal. Therefore, the light incident between the solar battery cell 3 and the solar battery cell 3 travels straight at the boundary between the translucent substrate 1 and the light receiving surface side sealing material 2. Then, the light enters the back sheet 6 perpendicularly, is reflected again vertically, and does not enter the light receiving surface of the solar battery cell 3.

  On the other hand, according to solar cell module 50 of the present embodiment, translucent substrate 1 and resin sealing layer (light-receiving surface side sealing material 2, solar cell) in the gap portion between adjacent solar cells 3 are used. Between the battery array 7 and the back surface side sealing material 5), the light which has a refractive index different from that of the translucent substrate 1 or the resin sealing layer and the cross section is convex on the back surface side and enters the gap portion is solar cell. Since the air layer 11 is formed as a refracting layer to be refracted to the side 3, the light incident on the gaps between the solar cells 3 is diffused by the prism effect and directly (or backsheet) to the solar cells 3. 6) (indirectly via 6) increase the incidence of solar cells 3. Thereby, the light quantity which injects into the photovoltaic cell 3 increases, and an output can be improved.

  FIG. 5 is a cross-sectional view of another example of the air layer (refractive layer) shape of the present embodiment. In the above example, the air layer 11 is a flat triangular hollow portion whose cross section is convex on the back surface side, but is configured as a flat semicircular hollow portion whose cross section is convex on the back surface side as shown in FIG. The air layer 12 may be used. A substantially similar effect can be obtained.

  In the present embodiment, the air layers 11 and 12 are formed as the refractive layers that refract the light incident on the gap portion toward the solar battery cell 3, but the refractive layers are not limited to the air layers 11 and 12. For example, a transparent resin material having a refractive index different from that of the resin sealing layer (light receiving surface side sealing material 2) may be used. However, by forming the refracting layers as the air layers 11 and 12 as in the present embodiment, the refracting layers can be provided without increasing the number of components, and the cost is not increased.

  Moreover, although the air layers 11 and 12 of this Embodiment are formed so that it may pass through the clearance gap between several sets of photovoltaic cells 3 over the full length in the longitudinal direction of the photovoltaic module 50 as mentioned above. In order to be formed in the gap portion between the solar cells 3 in the lateral direction, the solar cells 3 may be formed in a lattice shape surrounding the solar cells 3.

Embodiment 2. FIG.
FIG. 6 is an exploded perspective view of the main part of the solar cell module according to Embodiment 2 of the present invention. FIG. 7 is a cross-sectional view showing a path of light irradiated between solar cells in the second embodiment. In solar cell module 51 of the present embodiment, on the back surface of light-transmitting substrate 1 (between light-transmitting substrate 1 and light-receiving surface side sealing material 2) in the gap portion between adjacent solar cells 3. The transparent hollow tube 21 extends substantially over the entire length in the longitudinal direction of the solar cell module 51. Other configurations are the same as those of the first embodiment.

  The transparent hollow tube 21 is formed into a very thin tube using a heat-resistant and transparent plastic as a material, and extends substantially over the entire length in the longitudinal direction of the solar cell module 51, and a gap between a plurality of sets of solar cells 3. It is configured to pass through the part. And the transparent hollow tube 21 forms the air layer 13 as a hollow part of the flat triangle in which a cross section is convex on the back side inside. The air layer 13 operates as a refractive layer having a refractive index smaller than that of the translucent substrate 1.

  Next, the manufacturing method of this Embodiment is demonstrated. First, the rectangular translucent substrate 1 is disposed with the light receiving surface facing downward. Next, a plurality of transparent hollow tubes 21 are arranged at a predetermined interval on the back surface of the translucent substrate 1. At this time, even if the transparent hollow tube 21 and the positioning mark for the solar cell array 7 are preliminarily marked on the translucent substrate 1 so that the alignment with the solar cells 3 to be stacked in the subsequent procedure can be performed. Good. Moreover, you may fix the transparent hollow tube 21 with the small piece of a double-sided tape, for example so that the position of the arranged transparent hollow tube 21 may not shift | deviate.

  Next, the sheet-shaped light-receiving surface side sealing material 2 made of EVA resin is disposed on the translucent substrate 1 so as to sandwich the transparent hollow tube 21. Furthermore, a solar cell array 7 in which a plurality of solar cells 3 are electrically connected by output lead wires 4 is disposed on the light receiving surface side sealing material 2. At this time, the light receiving surface of the solar battery cell 3 is arranged facing the translucent substrate 1 side. Further, a sheet-like rectangular backside sealing material 5 made of EVA resin is disposed on the solar cell array 7. Finally, the back sheet 6 is arranged on the back side sealing material 5 to complete the production of the laminate.

  This laminate is pressurized at about 0.5 atm to 1.0 atm while being heated by a laminator in a vacuum state at a temperature of 100 ° C to 200 ° C for about 15 minutes to 1 hour. As a result, the light-receiving surface side sealing material 2 and the back surface side sealing material 5 are softened and crosslinked and fused, so that the translucent substrate 1, the transparent hollow tube 21, the solar battery cell 3, and the back sheet 6 are fused. Integrated. Note that the transparent hollow tube 21 is made of heat-resistant plastic and therefore does not melt. Finally, the solar cell module 51 is completed by fitting frame frames (made of a metal material such as aluminum or SUS, or a synthetic resin material) to each side of the outer periphery of the integrated laminate, and fixing each corner. To do.

  According to solar cell module 51 of the present embodiment, translucent substrate 1 and resin sealing layer (light-receiving surface side sealing material 2, solar cell array 7, back surface) in the gap portion between adjacent solar cells 3 The refractive index is different from that of the light-transmitting substrate 1 or the resin sealing layer between the side sealing material 5) and the light is incident on the gap between the solar cell 3 and the cross section is convex on the back side. Since the air layer 13 is formed as the refracting layer, the light incident on the gap between the solar cells 3 is diffused by the prism effect and directly to the solar cells 3 (or indirectly via the back sheet 6). In fact, the number of incident solar cells 3 is increased. Thereby, the light quantity which injects into the photovoltaic cell 3 increases, and it can improve an output (FIG. 7).

  FIG. 8 is a cross-sectional view of another example of the transparent hollow tube of the present embodiment. In the above example, the transparent hollow tube 21 is a flat triangular tube whose cross section is convex on the back surface side. However, as shown in FIG. Even in the case of the transparent hollow tube 22 that forms the air layer 14, substantially the same effect can be obtained.

  In the present embodiment, the air layers 13 and 14 are formed as the refractive layers that refract the light incident on the gap portion toward the solar battery cell 3 side. However, the refractive layers are not limited to the air layers 13 and 14. For example, the transparent hollow tubes 21 and 22 may be made solid. However, as in this embodiment, by using a hollow tube, a refractive layer can be provided with a small amount of material, and the cost is not increased.

  Moreover, the transparent hollow tubes 21 and 22 of this Embodiment are formed so that it may pass through the clearance gap between several sets of photovoltaic cells 3 over the substantially full length in the longitudinal direction of the photovoltaic module 51 as mentioned above. However, it may be formed in a lattice shape so as to surround the periphery of each solar battery cell 3 so as to be formed in a gap portion between the solar battery cells 3 in the lateral direction.

Embodiment 3 FIG.
FIG. 9 is an exploded perspective view of essential parts of the solar cell module according to Embodiment 3 of the present invention. FIG. 10 is a cross-sectional view showing a path of light irradiated between solar cells in the third embodiment. In solar cell module 52 of the present embodiment, on the back surface of light-transmitting substrate 1 (between light-transmitting substrate 1 and light-receiving surface side sealing material 2) in the gap portion between adjacent solar cells 3. The lattice-shaped transparent film 23 is sandwiched over almost the entire surface of the solar cell module 52. Other configurations are the same as those of the second embodiment.

  The transparent film 23 is formed into a lattice-like film using a heat-resistant and transparent plastic as a material. The transparent film 23 is arranged so that the solar cells 3 correspond to the respective openings, and the surroundings of the solar cells 3 Is a shape that surrounds the entire circumference.

  The back surface of the translucent substrate 1 has been embossed for the purpose of improving the adhesion with the light-receiving surface side sealing material 2 and has fine irregularities formed over the entire surface. The transparent film 23 is disposed in close contact with the back surface of the translucent substrate 1 and forms an air layer 15 indicated by hatching in FIG. 10 between the translucent substrate 1 and the translucent substrate 1 using embossing. The air layer 15 operates as a refractive layer that diffuses light.

  Next, the manufacturing method of this Embodiment is demonstrated. First, the rectangular translucent substrate 1 is disposed with the light receiving surface facing downward. Next, a film-like transparent film 23 is overlaid on the back surface of the translucent substrate 1. At this time, the transparent film 23 and the positioning mark for the solar battery array 7 may be marked on the translucent substrate 1 in advance so that the alignment with the solar battery cells 3 to be stacked in a later procedure can be performed. . Moreover, you may fix the transparent film 23 with the small piece of a double-sided tape, for example so that the position of the laminated | stacked transparent film 23 may not shift | deviate.

  Next, the sheet-like light-receiving surface side sealing material 2 made of EVA resin is disposed on the translucent substrate 1 so as to sandwich the transparent film 23. Furthermore, a solar cell array 7 in which a plurality of solar cells 3 are electrically connected by output lead wires 4 is disposed on the light receiving surface side sealing material 2. At this time, the light receiving surface of the solar battery cell 3 is arranged facing the translucent substrate 1 side. Further, a sheet-like rectangular backside sealing material 5 made of EVA resin is disposed on the solar cell array 7. Finally, the back sheet 6 is arranged on the back side sealing material 5 to complete the production of the laminate.

  This laminate is pressurized at about 0.5 atm to 1.0 atm while being heated by a laminator in a vacuum state at a temperature of 100 ° C to 200 ° C for about 15 minutes to 1 hour. As a result, the light-receiving surface side sealing material 2 and the back surface side sealing material 5 are softened and crosslinked and fused, so that the translucent substrate 1, the transparent hollow tube 21, the solar battery cell 3, and the back sheet 6 are fused. Integrated. Note that the transparent hollow tube 21 is made of heat-resistant plastic and therefore does not melt. Finally, the solar cell module 51 is completed by fitting frame frames (made of a metal material such as aluminum or SUS, or a synthetic resin material) to each side of the outer periphery of the integrated laminate, and fixing each corner. To do.

  According to solar cell module 52 of the present embodiment, translucent substrate 1 and resin sealing layer (light-receiving surface side sealing material 2, solar cell array 7, back surface) in a gap portion between adjacent solar cells 3 Between the side sealing material 5), an air layer 15 that diffuses light incident on the gap portion with a refractive index different from that of the translucent substrate 1 or the resin sealing layer is formed. In the light incident on the gap portion between the three, the light incident on the solar cells 3 directly (or indirectly through the back sheet 6) is increased. Thereby, the light quantity which injects into the photovoltaic cell 3 increases, and it can improve an output (FIG. 10).

  FIG. 11 is a cross-sectional view of another example of the shape of the air layer (refractive layer) formed between the translucent substrate and the transparent film. In the above example, the air layer 15 has a small triangular shape with a continuous cross section. However, the air layer 15 with a small semicircular shape with a continuous cross section as shown in FIG. Effects can be obtained.

  Thus, according to solar cell module 52 of the present embodiment, translucent substrate 1 and resin sealing layer (light-receiving surface side sealing material 2, solar cell) in the gap portion between adjacent solar cells 3 Air layers 15 and 16 are formed between the array 7 and the back surface side sealing material 5) to diffuse the light incident on the gap portion with a refractive index different from that of the translucent substrate 1 or the resin sealing layer. Therefore, the number of incident solar cells 3 directly on the solar cells 3 (or indirectly via the back sheet 6) is increased. Thereby, the light quantity which injects into the photovoltaic cell 3 increases, and an output can be improved.

  In Embodiments 1 to 3 described above, the use of a crystalline solar cell such as polycrystalline silicon or single crystal silicon has been described, but a non-crystalline solar cell such as a thin film solar cell or an organic solar cell. However, the present invention is applicable.

  As described above, the solar cell module according to the present invention includes a resin sealing layer in which a plurality of solar cells arranged in a row are sealed with a transparent resin, and laminated on the light receiving surface side of the resin sealing layer. The present invention is useful when applied to a solar cell module including the light-transmitting substrate and a back sheet laminated on the back side of the resin sealing layer.

DESCRIPTION OF SYMBOLS 1 Translucent board | substrate 2 Light-receiving surface side sealing material (transparent resin sealing material)
3 Solar cell 4 Output lead 5 Back side sealing material (transparent resin sealing material)
6 Back sheet 7 Solar cell array 11-16 Air layer (refractive layer)
21, 22 Transparent hollow tube 23 Transparent film 50, 51, 52 Solar cell module

Claims (8)

A resin sealing layer in which a plurality of solar cells arranged in a row are sealed with a transparent resin;
A translucent substrate laminated on the light-receiving surface side of the resin sealing layer;
In a solar cell module provided with a back sheet laminated on the back side of the resin sealing layer,
Between the light-transmitting substrate and the resin sealing layer in the gap portion between the adjacent solar cells, the cross-section is on the back side with a refractive index different from that of the light-transmitting substrate or the resin sealing layer. A solar cell module, characterized in that a refractive layer that is convex and refracts light incident on the gap portion is formed. The solar cell module according to claim 1, wherein the refractive layer is an air layer. A cross-sectional shape disposed between the light-transmitting substrate and the resin sealing layer in a gap portion between the adjacent solar cells further includes a transparent hollow tube having a convex on the back surface side,
The solar cell module according to claim 1 or 2, wherein the refractive layer is formed in the transparent hollow tube.   4. The solar cell module according to claim 3, wherein a cross-sectional shape of the refractive layer formed in the transparent hollow tube is a triangle convex on the back surface side.   4. The solar cell module according to claim 3, wherein a cross-sectional shape of the refractive layer formed in the transparent hollow tube is a semicircle convex toward the back surface side. The translucent substrate has an uneven shape on the back surface,
Further comprising a transparent film disposed between the light-transmitting substrate and the resin sealing layer in a gap portion between the adjacent solar cells,
3. The solar cell module according to claim 1, wherein the refractive layer is formed between the unevenness on the rear surface of the translucent substrate and the transparent film. The plurality of solar cells are arranged in a grid pattern in the same plane,
The said transparent film comprises a substantially grid | lattice form, is arrange | positioned corresponding to each said photovoltaic cell to each opening, respectively, and surrounds the circumference | surroundings of the said photovoltaic cell over the perimeter. Solar cell module. The unevenness | corrugation of the back surface of the said translucent board | substrate is provided in order to improve the adhesiveness of the said translucent board | substrate and the said resin sealing layer. The Claim 6 or 7 characterized by the above-mentioned. Solar cell module.

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