JP2000036611A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide good scratch resistance and to reduce the thickness and weight by embedding a step level difference of peripheral edge of a solar cell and a surface of a module base member with an adhesive to smooth them, and then forming a coating material. SOLUTION: An amorphous silicon solar cell 1 is formed on a stainless steel substrate having a thickness of 125 mm. Adherences of the cell 1 to an insulating sheet material 2 made of a nylon film having a thickness of 50 μm and the material 2 to a metal plate 3 are conducted by using an EVA resin 4 having a thickness of 300 μm. The resin of the adhesive is extended from a peripheral edge of an overall peripheral edge of the cell 1 to the outside so that upper and lower EVA resins are integrated, and a coating material is formed on the overall surface of a module. Accordingly, a thick film can be formed of paint material similar to other portion. Thus, the solar cell module for realizing a thin layer of a surface protective material can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module. More specifically, the present invention relates to a solar cell module that realizes a thinner coating material for a solar cell element.

[0002]

2. Description of the Related Art Solar cells, which are photoelectric conversion elements for converting sunlight into electric energy, are widely used as power supplies for consumer appliances such as calculators and watches, and are used as substitutes for so-called fossil fuels such as oil and coal. It is attracting attention as a technology that can be practically used as power for electricity.

[0003] A solar cell is a technique utilizing a diffusion potential generated at a pn junction of a semiconductor. A semiconductor such as silicon absorbs sunlight, and generates photo carriers of electrons and holes. The drift is caused by the internal electric field generated by the diffusion potential at the junction, and the drift is taken out. Examples of the material for the solar cell include tetrahedral amorphous semiconductors such as single crystal silicon, polycrystalline silicon, amorphous silicon, amorphous silicon germanium, and amorphous SiC; II-VI group such as CdS and Cu ₂ S; III
-V group compound semiconductors and the like. In particular, thin-film solar cells using amorphous semiconductors are promising because of their advantages such as the ability to produce large-area films, smaller thicknesses, and the ability to be deposited on any substrate material compared to single-crystal solar cells. Have been watched.

[0004] Amorphous silicon solar cells, crystalline thin-film solar cells, and the like use a thin-film solar cell element formed on a flexible substrate such as stainless steel to provide a thin, light, and more flexible solar cell. It is made in the form of a battery module and is in practical use. In addition, the surface is coated with a coating material for weather resistance and protection from mechanical damage.

[0005] As a standard for evaluating a coating material of a solar cell element, there is a "scratch test" of the UL standard described below.
If this test can be passed, the protection of the coating is considered to be sufficient.

[0006] The content of the "scratch test" is briefly described below. A test machine having a steel blade 7 shown in FIG.
When the solar cell surface was moved at 2.4 mm / s while applying a load 8 of 907 g, and there was no problem in the electrical performance of the solar cell thereafter, the test was passed.

Incidentally, EVA (ethylene vinyl acetate) resin and a fluororesin film are usually used as a protective material for the solar cell element. However, in order to exhibit sufficient covering protection ability of the solar cell element, glass fibers are dispersed in EVA to have a thickness of 450 μm or more, and a fluororesin film of about 50 μm is formed thereon. There is a problem that the film becomes thick.

On the other hand, there is a strong demand for thinner and lighter solar cells, and it is required that the coating material of the solar cell element be as thin as possible.

As a method of this, there is a method of coating a solar cell element by coating a coating material on the surface of the solar cell element, for example. With reference to FIG. 2, an example of an amorphous silicon solar cell module manufactured using the method for coating a solar cell element by this coating method will be described.

In FIG. 2, reference numeral 1 denotes a solar cell element;
A metal electrode layer formed on a stainless steel substrate having a thickness of 125 μm by a method such as sputtering, and plasma CVD.
It is formed by sequentially laminating an amorphous silicon semiconductor layer in which n, i, and p layers are sequentially formed by a method or the like, and a transparent electrode layer formed by a resistance heating evaporation method or the like. Reference numeral 2 denotes an insulating sheet material made of a nylon resin or the like having a thickness of 50 μm. Reference numeral 3 denotes a metal plate serving as a module base member of the solar cell module, and a zinc-coated steel plate having a thickness of 300 μm or the like is used. Reference numeral 4 denotes an adhesive for bonding the solar cell element 1 to the insulating sheet material 2 and the insulating sheet material 2 to the metal plate 3, for example, EVA. Here, as for the solar cell element 1, a current collecting electrode formed using a silver paste or the like on a transparent electrode layer by a screen printing method is connected to an external positive electrode terminal (not shown), and a stainless steel substrate is connected to an external electrode (not shown). It is connected to the negative terminal.

In order to cover and protect such a solar cell element 1, for example, a fluororesin paint is used and the thickness is 150 μm.
About 5 covering materials 5 are provided. The required performance of the coating material 5 includes a moisture-proof property for moisture-proofing the solar cell element surface, a hardness for passing a “scratch test”,
Considering weather resistance etc., the material is inorganic paint,
Fluororesin paint, acrylic silicone paint, or a combination thereof is used. By forming the coating material from the coating material in this manner, the coating material can be made thinner.

However, if the solar cell is coated only with the coating material 5, it is difficult to form a sufficient coating state that can pass the above-mentioned "scratch test" in the portion A which is the end of the stainless steel substrate. There's a problem. This is because the thickness of the coating material 5 is about 150 μm, the thickness of the stainless steel substrate as the base of the solar cell element is 125 μm, and the thickness of the adhesive layer for bonding the solar cell element and the insulating sheet material is 100 μm. The thickness of the insulating sheet material is 50 μm, the thickness of the adhesive layer for bonding the insulating sheet material and the metal plate is 100 μm, and the step B between the surface of the solar cell element and the metal plate is about 375 μm. As shown in the figure, the coating material flows when it is not cured, and the thickness C of the coating material 5 in the portion A can be provided at most only about 30 μm.

Therefore, as can be seen from FIG. 5, the coating is easily broken at the periphery of the solar cell corresponding to the portion A in FIG. 2 by the steel blade 7. That is, the hardness is low, and it is not possible to pass the “scratch test”. Therefore, as shown in FIG. 3, overcoats such as silicone resin are applied to portions where the step is large compared to the film thickness of the coating material and a sufficient coating form is not formed only by coating with the coating material, as shown in FIG. By providing the material 6, a configuration is considered in which the step is filled and a covering material is provided thereon.

However, in the step of providing such an overcoat material, the overcoat material is applied using a coating device such as a dispenser, and then the overcoat material is cured by heating or irradiation with ultraviolet light. A coating material needs to be applied and cured, and an application step and a curing step of the overcoat material are required. For this reason,
A new production device such as a coating device, a heating furnace or an ultraviolet irradiation device is required, and the time required for the process and an operator are required. The production cost of the solar cell module is reduced due to the formation of the overcoat material. There is a problem that it rises significantly.

[0015]

In view of the above drawbacks, a first technical object of the present invention is to provide a solar cell module in which a solar cell element is installed on a module base member and a covering material is formed on the surface. It is an object of the present invention to provide a thin and light solar cell module having good scratch resistance, simplify a process, and reduce costs.

[0016]

The solar cell module of the present invention comprises a module base member, a first adhesive, and a solar cell element having a photoelectric conversion semiconductor layer formed on a substrate, which are sequentially laminated. A solar cell module having a surface coated with a coating material, wherein the step between the periphery of the solar cell element and the surface of the module base member is filled with the first adhesive to make the solar cell module smooth. The coating material is formed on the entire surface.

Further, another solar cell module of the present invention comprises a module base member, a first adhesive (or a second adhesive), an insulating sheet material, a second adhesive (or a first adhesive). A solar cell module in which a solar cell element formed by forming a photoelectric conversion semiconductor layer on a substrate is sequentially laminated and arranged, and the surface is covered with a coating material, wherein the periphery of the solar cell element and the base The step with the member surface is
A solar cell module, wherein the coating material is formed on the entire surface of the solar cell module after filling with an adhesive and smoothing.

It is preferable that the first adhesive is cured while a pressing force is applied to the vicinity of the periphery of the solar cell element. In addition, the first adhesive is 10% when uncured.
It is desirable that the adhesive be a liquid adhesive or a solid adhesive having a viscosity of 0 cp or more. Further, it is desirable that the surface of the first adhesive be treated with an organic compound coupling agent or / and that an organic compound coupling agent be added to the coating material.

[0019]

Next, an embodiment of the present invention will be described.

In the solar cell module of the present invention, as shown in FIG. 1, the periphery of the solar cell element is gently filled with the first adhesive, so that the solar cell element is covered with the solar cell element. Performed uniformly throughout. Therefore, it is possible to prevent the breakage of the coating material due to the scratch test. Further, since the step is filled with the first adhesive, it can be manufactured in the same manufacturing process as before, and an increase in manufacturing cost can be prevented.

The procedure for manufacturing the solar cell module of the present invention is described below.

First, a solar cell element is arranged and bonded on a module base member via a first adhesive. Alternatively, a first adhesive, an insulating sheet material,
The second adhesive and the solar cell element are arranged in this order. here,
At least the first adhesive is formed so as to protrude from the periphery of the solar cell element. The order of lamination of the first adhesive and the second adhesive may be reversed, or the same adhesive may be used.

The first and second adhesives are applied to the bonding surface by using a dispenser device, a die coater device, or the like, or a sheet-like adhesive is disposed between the adherends, and at least the periphery of the solar cell element. With the pressing force applied near the part,
For example, it is cured by heating. Specifically, a method using a vacuum laminator device described later is one of suitable methods.

Next, a covering material is formed on the solar cell module manufactured as described above. In order to achieve the thinning, a coating material is preferable, and the forming method is in accordance with the forming method of the coating material to be used. For example, a liquid coating material is coated on the module surface by an air spray device or the like. Coating is performed several times so that a uniform film is formed, and cured at about 120 ° C.

In the present invention, when a plurality of solar cell elements are provided, the series-parallel connection is completed before bonding.
In addition, a method in which the positive and negative external terminals of the module are formed by making holes in a member serving as a base of the module and extracting it from the back surface side is suitable for the solar cell module of the present invention.

The solar cell module of the present invention is manufactured through the steps described above.

In the solar cell module of the present invention, when the adhesive is cured, a pressing force is applied to the solar cell element and the module base member at least in the vicinity of the periphery of the solar cell element via an elastic member. It is preferable that By applying a pressing force via an elastic member, the adhesive can be formed into a desired shape. As the material of the member having elasticity, for example, a rubber material such as silicon rubber or neoprene rubber is used.

In the present invention, at least the first adhesive is formed so as to protrude outside the peripheral edge of the solar cell element. In order to form an adhesive having the following formula, as shown in FIG. 1, the height from the surface of the module base member to the surface of the solar cell element is a, and the distance from the periphery of the solar cell element to the adhesive end is b. , B ≧ 1.5
a is preferably satisfied.

As the adhesive in the present invention, for example, an epoxy resin, an acrylic resin, a polyurethane resin, a silicone adhesive, a rubber adhesive such as polychloroprene, an EVA resin, a polyamide resin, etc. An adhesive such as a melt adhesive is preferably used.

At least the first adhesive has a viscosity of 100 cp when uncured so that a desired shape can be formed without flowing out of the adhesive when a pressing force such as atmospheric pressure is applied in the adhesive curing step. The above liquid or solid adhesives are preferred.

The coating material of the solar cell module of the present invention is preferably a coating material in order to realize a thin coating material, and a material having excellent weather resistance, moisture resistance, hardness and the like is used. For example, inorganic paints, fluororesin paints, acrylic silicone paints, and the like, and combinations of these paint materials are suitably used.

In order to improve the adhesion between the surface of the adhesive and the coating material, a coupling agent of an organic compound is added to the coating material, or the surface of the adhesive is treated with a coupling agent of an organic compound. Preferably, examples of the material include a silane coupling agent and a titanate coupling agent.

As the module base member of the solar cell module of the present invention, for example, a metal, a metal whose back surface is subjected to insulation treatment, carbon fiber, glass fiber reinforced plastic, ceramic, glass, etc. are used.

The size of the module base member is larger than the outermost peripheral edge of one solar cell element or a plurality of connected solar cell elements by 2 mm or more in all directions in consideration of the above-mentioned adhesive forming range. It is desirable to have an external shape.

As the insulating sheet material of the present invention, for example, P
ET (polyethylene terephthalate), PEN (polyethylene naphthalate), nylon, polypropylene, fluororesin and the like are used.

The size of the insulating sheet material is such that the distance c from the peripheral edge of the solar cell element to the end is 0 ≦ c ≦ 0.5a because the end is not formed by protruding from the adhesive.
Is preferably within the range.

[0037]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited to these Examples.

Example 1 FIG. 1 is a sectional view showing Example 1 of a solar cell module according to the present invention.

In Example 1, the amorphous silicon solar cell element 1 was formed on a 125 μm thick stainless steel substrate. The adhesion between the solar cell element 1 and the insulating sheet material 2 made of a nylon film having a thickness of 50 μm, and the adhesion between the insulating sheet material 2 and the metal plate 3 (a module base member made of a zinc-coated steel sheet having a thickness of 300 μm) are both performed. The test was performed using EVA resin 4 having a thickness of 300 μm. Then, the EVA resin as an adhesive protruded outside the peripheral portion of the solar cell element 1 over the entire peripheral portion, and the upper and lower EVA resins were integrated, and a covering material was formed over the entire surface of the module surface.

The method of bonding the solar cell element 1, the insulating sheet material 2, and the metal plate 3 in Example 1 will be described below.

The EVA resin used in Example 1 has a thickness of 30
It is formed in a sheet shape of 0 μm. This EVA
Resin sheet is 5 mm in all directions from the outer shape of insulating sheet material 2
A large cut was made, placed on a metal plate 3, and an insulating sheet material 2 was placed thereon. At this time, the outer shape of the metal plate 3 is larger than the insulating sheet material 2 by 20 mm in all directions.
Was manufactured 1 mm larger than the solar cell element 1 in the same manner. Similarly, the EVA resin sheet was cut out 3 mm larger than the outer shape of the solar cell element 1, placed on the insulating sheet material 2, and the solar cell element 1 was placed thereon.

The size of the EVA resin sheet is larger than an appropriate amount in terms of adhesive strength as an amount of the adhesive.
However, by curing the peripheral portion of the solar cell element with a pressing force by using an adhesive exceeding the appropriate amount, a desired shape satisfying the above-mentioned b ≧ 1.5a can be formed.

Next, a 50 μm thick fluororesin film 9 having a larger outer dimension than the metal plate 3 is used as a release film.
Was placed with its surface not subjected to an easy adhesion treatment such as a corona discharge treatment facing downward. Next, this was installed in the above-mentioned vacuum laminator apparatus 10 shown in FIG.

The vacuum laminator device 10 has a tube 12 provided on a wall surface 11, and this tube 12 is connected to a vacuum pump (not shown). Further, a heater 14 is disposed below the copper plate 13 so that the heater 14 can be set at a desired temperature. Reference numeral 15 denotes a flexible sheet made of silicon rubber or the like, which has elasticity. By operating the vacuum pump, the inside of the apparatus can be hermetically sealed by the sealing material 16. In this state, the inside of the apparatus was maintained at 150 ° C. for 30 minutes by the heater 14, and then cooled to room temperature by a cooling water circulation device (not shown).

The reason why the inside of the apparatus is kept at 150 ° C. for 30 minutes is to allow the EVA resin to undergo a crosslinking reaction at 150 ° C. In this state, the EVA resin is softened and the inside of the apparatus is evacuated to a vacuum state. Since the sheet is pressed at atmospheric pressure via the flexible sheet 15, the EV sheet is removed from the periphery of the solar cell element and the insulating sheet material as described above.
A resin will protrude. As a result, as shown in FIG. 1, a shape is formed in which the surface layer fills the step between the periphery of the solar cell element and the surface of the metal plate and becomes smooth.

At this time, if the EVA resin has a very low viscosity at 150 ° C., it will be pressed down to the atmospheric pressure and flow, and it will not be possible to form the above-mentioned shape. Resin should have appropriate viscosity (10
000 cp), and it was possible to form a gentle shape filling the steps.

Next, a process of forming a covering material on the solar cell module manufactured as described above will be briefly described.

The entire surface of the solar cell module was repeatedly coated with a fluororesin paint several times by an air spray device and left to cure in a heating furnace at 120 ° C. for 40 minutes to form a coating layer of about 150 μm.

At this time, as described above, the solar cell module of the first embodiment has an EVA at the periphery of the solar cell element.
Since the resin is formed in a shape that makes the step between the peripheral edge of the solar cell element and the surface of the metal plate gentle, the coating material does not become thin in the peripheral part of the solar cell element, which is a problem of the conventional example. The coating material was formed with a uniform film thickness.

The coating material of this fluororesin-based paint is
Enough to pass the scratch test described above,
No change in the appearance of the coating material and no change in electrical characteristics such as photoelectric conversion efficiency by the scratch test were observed.

As described above, in the manufactured solar cell module, no additional overcoat material is provided on the periphery of the solar cell element as described in the related art, so that the process time and cost for this step are increased. Without having to do so, the thickness of the coating material of the solar cell module could be reduced.

(Embodiment 2) Next, Embodiment 2 of the present invention is shown in FIG.

The solar cell element 1 was manufactured in the same manner as in Example 1, and a glass fiber reinforced polyester resin plate 17 as an insulating substrate was used as a module base member.
Solar cell element 1 and glass fiber reinforced polyester resin plate 1
7 was bonded using an epoxy resin-based one-liquid heat-curable adhesive (Y-3800 manufactured by Yokohama Rubber Co., Ltd.) 18.

The adhesive (Y-3800) had a viscosity of 500 p when it was not cured, so it was applied using a die coater. On the glass fiber reinforced polyester resin plate 17, the thickness is 2 mm larger than the outer shape of the solar cell element 1 in all directions.
Then, the solar cell element 1 was further coated thereon with a fluororesin film 9 in the same manner as in Example 1, and was placed in the vacuum laminator apparatus 10.

The reason for setting the adhesive application range to the above value is that, as in the first embodiment, the adhesive formation range is b ≧ 1.5.
The value was determined based on the results obtained by experiments so as to form a desired shape satisfying a.

In the second embodiment, the adhesive is applied to the glass fiber reinforced polyester resin plate 17 having a large outer shape as an adherend. However, the adhesive is applied to the solar cell element 1 and the desired adhesive is applied. If the amount is insufficient, a method of separately providing a peripheral part of the solar cell element using a dispenser device or the like may be performed.

Next, it was set in the vacuum laminator apparatus 10, the inside was evacuated, and then kept at 120 ° C. for 10 minutes. After cooling, the solar cell module was taken out. The curing condition of the adhesive (Y-3800) is 120 ° C. for 40 minutes. However, due to the above heating conditions, the adhesive Y-3800 is applied to the periphery of the solar cell element and the surface of the glass fiber reinforced polyester resin plate in the same manner as in Example 1. Was formed in a shape to make the step gentle. Further, the surface layer of the adhesive (Y-3800) had already been cured, and the fluororesin film as the release film could be peeled off without breaking the shape of the adhesive.

In this step, since the adhesive Y-3800 has a very high viscosity of 500 p, it can be formed into a desired shape without being pushed by the atmospheric pressure and flowing like the first embodiment. did it.

The step of forming the surface covering member was performed in the same manner as in Example 1. First 30 to cure the coating material
Minutes and later for 40 minutes into a 120 ° C. oven. Under these heating conditions, the adhesive (Y-3800) could be completely cured.

When a scratch test was performed on the solar cell module manufactured as described above, no change in the appearance of the coating material and no change in the electrical characteristics due to the test were observed.

Third Embodiment Next, a third embodiment of the present invention will be described. 8 and 9 are a plan view and a cross-sectional view taken along line D-D of the third embodiment, respectively. In the third embodiment, three solar cell elements are provided in series with one metal plate 3 as a module base member.
Other configurations are the same as in the first embodiment.

Reference numeral 19 denotes a copper foil connecting the solar cell elements 2A and 2B and 2B and 2C in series. On the positive electrode side of the solar cell element, a current collector 20 and a silver paste 21 formed of a silver paste are used. The negative electrode is connected to the stainless steel substrate of the solar cell element by a solder 22 for stainless steel. Reference numeral 23 denotes a polyimide insulating tape provided at a portion where the copper foil 19 is disposed to prevent a short circuit.

The copper foil 19 was provided between the thick battery elements as shown in the plan view 8, and the periphery of the solar cell element excluding the copper foil 19 was formed of EVA resin in the same manner as in Example 1.

Here, the peripheral portion of the solar cell element other than the portion between the solar cell elements is shown in a portion E in FIG. 8 in a shape that smoothly connects the peripheral portion of the solar cell element and the surface of the metal plate as in the first embodiment. Except for the connection portion between the solar cell elements, a cross-sectional shape in which the surface layer of the adhesive connects the adjacent solar cell element surfaces could be formed so as to completely fill the concave portions between the solar cell elements. Further, in the connection portion formed by the copper foil 19, the recessed portion was filled with a silicon resin.

When a scratch test was performed on the manufactured solar cell module, no change in the appearance of the coating material was observed, and no deterioration in electrical characteristics after the test was observed.

(Embodiment 4) Next, Embodiment 4 of the present invention will be described.

In Example 4, a pressure device shown in FIG. 10 was used instead of the vacuum laminator used in the curing step of the adhesive in Example 2. The solar cell module is put into a heating furnace in a state where the solar cell module is pressurized and fixed using the pressurizing device 24,
A solar cell module was produced in the same manner as in Example 2 except that the adhesive 18 was cured.

In the fourth embodiment, with the fluororesin film 9 as a release film placed on the light receiving surface side of the solar cell module, an aluminum pressurizing material 26 is applied via the silicon rubber 25 and the back surface side. , A copper plate 27 was disposed, and fixed by a spring member (not shown) so as to be in a pressurized state of about 1 kg / cm ² .

At this time, the silicone rubber 25 is appropriately deformed at the F portion by the pressing force as shown in FIG. 10, so that the adhesive 18 causes a step between the solar cell element 1 and the glass fiber reinforced polyester resin plate 17 to be formed. It could be formed into a desired shape to fill.

When a scratch test was performed on the manufactured solar cell module, no change was observed in the appearance of the coating material, and no deterioration in electrical characteristics after the test was observed.

[0071]

As described above, according to the first to sixth aspects of the present invention, the coating material can be formed in the peripheral portion of the solar cell element where the coating material cannot be formed in a thick film state, similarly to the other portions. A thick film can be formed from a material, and a solar cell module in which the surface protective material has been made thinner can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a solar cell module of Example 1.

FIG. 2 is a schematic sectional view showing an example of a conventional solar cell module.

FIG. 3 is a schematic sectional view showing an example of a conventional solar cell module.

FIG. 4 is a schematic view showing an example of a scratch tester.

FIG. 5 is a schematic cross-sectional view showing a state where a blade of a scratch tester is in contact with a conventional solar cell module.

FIG. 6 is a schematic sectional view showing an example of a vacuum laminator device.

FIG. 7 is a schematic sectional view showing a solar cell module according to a second embodiment.

FIG. 8 is a schematic plan view showing a solar cell module according to a third embodiment.

FIG. 9 is a schematic sectional view showing a solar cell module according to a third embodiment.

FIG. 10 is a schematic cross-sectional view illustrating a manufacturing process of the solar cell module of Example 4.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar cell element, 2 Insulation sheet material, 3 Module base member (metal plate), 4 Adhesive (EVA resin), 5 Coating material (fluororesin paint), 6 Overcoat material, 7 Scratch tester blade, 8 Weight, 9 Fluororesin film, 10 Vacuum laminator device, 11 Inner wall, 12 tubes, 13 Copper plate, 14 Heater, 15 Silicon rubber sheet, 16 Sealing material, 17 Glass fiber reinforced plastic, 18 Epoxy resin adhesive, 19 Copper foil, Reference Signs List 20 current collecting electrode, 21 silver paste, 22 stainless steel solder, 23 polyimide tape, 24 pressing device, 25 silicon rubber, 26 pressing material, 27 copper plate.

Continued on the front page (72) Inventor Ichiro Kataoka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Soichiro Kawakami 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tsutomu Murakami 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Takahiro Mori 3-30-2 Shimomaruko 3-chome, Ota-ku, Tokyo In Canon Inc. (72) Invention Person Hirofumi Ichinose 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Hiroshi Yamamoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc.

Claims (6)

[Claims] 1. A solar cell comprising a module base member, a first adhesive, and a solar cell element having a photoelectric conversion semiconductor layer formed on a substrate, which are sequentially laminated and arranged, and the surface of which is covered with a coating material. A module, wherein a step between a peripheral edge of the solar cell element and a surface of the module base member is filled with the first adhesive to make the surface smooth, and then the coating material is formed on the entire surface of the solar cell module. And solar cell module. 2. A photoelectric conversion semiconductor layer is formed on a module base member, a first adhesive (or a second adhesive), an insulating sheet material, a second adhesive (or a first adhesive), and a substrate. A solar cell module is sequentially laminated and arranged, and the surface is coated with a coating material,
A solar cell module, wherein the step between the periphery of the solar cell element and the surface of the base member is gently filled with the first adhesive, and then the covering material is formed on the entire surface of the solar cell module. 3. The solar cell module according to claim 1, wherein the first adhesive is cured in a state where a pressing force is applied to a vicinity of a peripheral portion of the solar cell element. 4. The method according to claim 1, wherein the first adhesive is a liquid adhesive having a viscosity of 100 cp or more when uncured, or a solid adhesive. The solar cell module as described. 5. The method according to claim 1, wherein the surface of the first adhesive is treated with an organic compound coupling agent.
The solar cell module according to any one of claims 4 to 4. 6. The solar cell module according to claim 1, wherein a coupling agent of an organic compound is added to the coating material.