JP2005068739A - Building material with solar battery and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building material with a solar battery capable of further bringing out superior design, while maintaining serviceability. <P>SOLUTION: A light emitting tile P has a solar battery module 21, a control circuit 22, an LED lamp 23, and a body part 40 incorporated with these solar battery modules 21, and forming an external shape as the building material. The body part 40 is composed of a cement type fixing part 30 for fixing the solar battery module 21, and a skin layer 10 arranged on the surface side of the fixing part 30 integrally with the fixing part 30. The skin layer 10 is composed of a cement type matrix M for hiding the solar battery module 21 so as to be invisible from the outside, and a light transmissive material C dispersed in the matrix M, and allowing reception of the light of the solar battery module 21 from the outside. The light of the LED lamp 23 is also irradiated outside by the light transmissive material C. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a building material with a solar cell and a method for producing the same.

  Solar cells made of single crystal silicon or the like generate electromotive force by sunlight or the like. The solar cells are sealed with a light-transmitting front cover and back cover while being connected in series or in parallel to form a solar cell module. In general, a plurality of solar cell modules are arranged in series or in parallel and installed on a gantry to form a solar cell array, and this solar cell array is generally provided on the roof of a building. If the solar cell array is provided on the roof of the building in this way, electric power can be obtained by sunlight or the like.

  However, in a building provided with a solar cell array, the solar cell array has a sense of incongruity with the surroundings, and the appearance is not sufficient. From such a viewpoint, Patent Document 1 proposes a solar cell roof glass made of colored glass having a visible light transmittance of 5 to 70% and a surface having antireflection properties. Patent Document 2 proposes a substrate on which a similar pattern of an array pattern of solar cells in a solar cell module is printed. In a building provided with a solar cell array on the roof, by providing these glasses and substrates in portions other than the solar cell array, a sense of unity with the solar cell array is produced, thereby improving the appearance of the building. It is.

JP-A-10-227102 JP 2002-106151 A

  However, the techniques disclosed in Patent Documents 1 and 2 are merely to make the parts other than the solar cell array have the same appearance as the solar cell array, and the design of the building is limited. In other words, in these technologies, the solar cell array is visually recognized as it is, so that the building cannot exhibit an excellent design.

  In this respect, a light emitting tile having at least a solar cell module and having an outer shape as a tile is also known (claim 13, paragraph 0064, paragraph 0065 and FIG. 8, Japanese Patent No. 2964859 of JP 2001-140439 A). In addition, “TAGAWA TILE” in the “All Weather Solar Solar Luminous System” catalog issued by Sanyo Living Supply Co., Ltd.). Since these light emitting tiles can be used in combination with general tiles and the like, it is considered that the design of the building can be improved as compared with the conventional design. Moreover, these light emitting tiles also incorporate LED lamps that can emit light by the electromotive force of the solar cell module together with the solar cell module, so that even if there is no external power supply, the LED lamp emits light. Illumination, guidance, etc. are possible.

  However, in these light emitting tiles, the solar cell module is exposed on the surface as it is, or the appearance is possible, and the design property as a building material is lacking. However, since the solar cell module generates an electromotive force when irradiated with sunlight or the like, if it is concealed, the usefulness of the solar cell module as a building material with solar cells is completely impaired.

  This invention is made | formed in view of the said conventional situation, Comprising: It is set as the problem which should be solved to provide the building material with a solar cell which can exhibit the more superior designability, maintaining a usefulness.

The building material with solar cell of the present invention comprises a solar cell module, and a main body part that incorporates the solar cell module and forms an outer shape as a building material,
The main body portion is a cement-based fixing portion for fixing the solar cell module;
A cement-based matrix provided integrally with the fixing portion on the surface side of the fixing portion and concealing the solar cell module from the outside so as not to be visible from the outside, and light reception of the solar cell module from the outside dispersed in the matrix It is characterized by comprising a skin layer composed of a translucent material that allows the

  The building material with a solar cell of the present invention includes a solar cell module and a main body portion that incorporates the solar cell module and forms an outer shape as a building material. The main body portion includes a fixing portion for fixing the solar cell module, and a skin layer provided integrally with the fixing portion on the surface side of the fixing portion. Since the fixing part is cement-based and the matrix of the skin layer is also cement-based, the fixing part and the skin layer are firmly adhered to each other, and the strength as a building material is exhibited.

  The matrix of the skin layer hides the solar cell module from the outside invisible. For this reason, this building material with a solar cell demonstrates the outstanding design property.

  Further, the skin layer has light-transmitting materials dispersed in the matrix, and these light-transmitting materials allow the solar cell module to receive light from the outside. For this reason, even if the conversion efficiency is lowered by the matrix, the solar cell module can still maintain a sufficient conversion efficiency by sunlight or the like irradiated through the translucent material of the skin layer. That is, the light transmittance of the building material with solar cell of the present invention exceeds 0% and is less than 100%. Thus, this building material with solar cells maintains excellent utility. In particular, since solar cells with high conversion efficiency have been developed in recent years, sufficient conversion efficiency can be ensured by the incidence of sunlight or the like through the translucent material of the skin layer.

  Therefore, the building material with solar cell of the present invention can exhibit excellent design properties while maintaining its usefulness.

  The solar cell module is a combination of a plurality of solar cells made of single crystal silicon or the like, which are combined in series or in parallel while being sealed with a light-transmitting front cover and back cover. This solar cell module has a plurality of solar cells to obtain a large electromotive force, and since each solar cell is sealed, there is no problem even if it is embedded by a cement-based fixing part. . This solar cell module has a pair of output cables. If the building material with a solar cell of the present invention provides these output cables to the outside, it is possible to output electric power to the outside by them.

  The translucent material includes a material that can transmit light in addition to the case of being colored or colorless and transparent. As the light-transmitting material, colored or colorless transparent or translucent glass particles or plastic particles can be employed. According to the test results of the inventors, the translucent material preferably has a refractive index of 1.51 or less. General plate glass has a refractive index of about 1.55, and when this plate glass is roughly crushed and used as a light-transmitting material, sunlight is easily totally reflected on the surface of the light-transmitting material. It's hard to reach. On the other hand, for example, when the optical glass used for a cathode ray tube or the like is roughly crushed and used as a light transmitting material, the light transmitting material has a refractive index of 1.51 or less, and sunlight is a light transmitting material. It is difficult to totally reflect on the surface of the solar cell module and easily reach the solar cell module.

  It is preferable that the ratio of the translucent material in a skin layer is 30-90 mass%. When the ratio of the light transmissive material is more than 90% by mass, the solar cell module is easily visually recognized, and the design property is impaired. On the other hand, when the ratio of the light-transmitting material is less than 30% by mass, sunlight or the like hardly enters, and the conversion efficiency of the solar cell module tends to be insufficient. A more preferable range is 40 to 80% by mass.

  Moreover, it is preferable that a translucent material is a thing with a particle size of about 5 mm. In a translucent material having a particle size larger than about 5 mm, the individual translucent material becomes large on the surface of the building material with solar cells, and the solar cell module is easily visually recognized, thereby impairing the design. On the other hand, in a translucent material having a particle size of less than about 1 mm, sunlight or the like hardly enters, and the conversion efficiency of the solar cell module tends to be insufficient.

  Moreover, it is preferable that the surface of the skin layer exposes the translucent material on the surface. If the surface of the skin layer exposes the light-transmitting material on the surface, sunlight or the like easily reaches the solar cell module from the surface, and the conversion efficiency of the solar cell module increases. Moreover, in the building material with a solar cell in which the LED lamp is also built in, the surface of the skin layer exposes the translucent material on the surface, so that the light of the LED lamp is easily irradiated to the outside from the surface.

  Furthermore, it is preferable that the matrix is mainly white cement. As a result, the skin layer becomes almost white, and sunlight or the like is not absorbed by the matrix, but easily reaches the solar cell module through the translucent material, and the conversion efficiency of the solar cell module increases. In the case where the matrix is mainly white cement, the matrix can contain other pigments exhibiting a light color. It is also possible to decorate the matrix with light color printing or the like.

  The building material with a solar cell of the present invention may include a control circuit connected to the solar cell module and an LED lamp connected to the control circuit and capable of emitting light based on the electromotive force of the solar cell module. In this case, the main body also incorporates a control circuit and an LED lamp. The fixing unit also fixes the control circuit and the LED lamp. First, the translucent material of the skin layer guides the light of the LED lamp to the outside. Secondly, the skin layer may have a guide member that is provided in the matrix and guides the light of the LED lamp to the outside. As the guide member, a colored or colorless transparent or translucent glass rod, glass fiber, plastic rod, or plastic fiber can be employed. Such a building material with a solar cell can be illuminated and guided by an LED lamp without any external power supply, and exhibits particularly excellent utility.

  As the control circuit, for example, a power supply circuit including a constant voltage circuit such as a Zener diode and an oscillation circuit such as a Schmitt trigger inverter IC can be employed. The power supply circuit may have a storage battery such as a capacitor. An LED lamp that emits light in red, white, blue, or the like can be used.

The building material with solar cell of the present invention can be produced by the production method of the present invention. This manufacturing method prepares a first mortar formed by mixing a cement raw material and a translucent material, and flows the first mortar into the bottom surface of the cavity;
A second step of placing a solar cell module on the first mortar in the cavity;
A third step of preparing a second mortar obtained by mixing a cement raw material, and pouring the second mortar over the first mortar and the solar cell module in the cavity;
And a fourth step of solidifying the first mortar and the second mortar to obtain a building material with a solar cell.

  In this manufacturing method, the bottom surface side of the cavity becomes the skin layer, and the light transmitting material of the first mortar is likely to exist on the surface of the skin layer. Thereby, it is easy to manufacture the building material with a solar cell in which the surface of the skin layer exposes the translucent material on the surface.

  When manufacturing a building material with a solar cell comprising a control circuit and an LED lamp, the following first or second method can be adopted.

  In the first manufacturing method, the control circuit and the LED lamp are also placed on the first mortar in the cavity in the second step. In the third step, the second mortar is poured onto the first mortar, the solar cell module, the control circuit, and the LED lamp in the cavity. Thereby, the translucent material of a skin layer can manufacture the building material with a solar cell which guides the light of an LED lamp outside.

  In the second manufacturing method, in the second step, an LED lamp device is prepared in which a guide member capable of guiding light to the outside is fixed to the light emitting portion of the LED lamp. In addition, the control circuit is placed on the first mortar in the cavity, and the guide member of the LED lamp device is inserted into the first mortar. In the third step, the second mortar is poured onto the first mortar, the solar cell module, the control circuit, and the LED lamp device in the cavity. Thereby, the building material with a solar cell which the guide member of an outer skin layer guides the light of an LED lamp outside can be manufactured.

  In the production method of the present invention, in the fourth step, it is preferable to polish the surface of the skin layer so that the translucent material is exposed on the surface. This ensures that the surface of the translucent material is exposed on the surface of the skin layer.

Hereinafter, Embodiment 1 and 2 which actualized the building material with a solar cell of this invention in the light emitting tile are described, referring drawings with a comparative example.
“Embodiment 1”

(First step)
First, as translucent material C (see FIGS. 2 and 3), glass particles (average particle size 5 mm) of translucent optical glass are prepared. The glass particles have a refractive index of 1.51. Also, white cement and quartz sand (average particle size 5 mm) are prepared. These are mixed in the ratio shown in Table 1, and the 1st mortar 10 (refer FIG. 1) of Examples 1-3 and Comparative Examples 1 and 2 is obtained.

  Then, a mold 1 shown in FIG. 1A is prepared, and each first mortar 10 is poured into the bottom surface of the cavity 1 a of the mold 1. At this time, since the bottom surface side of the cavity 1 a becomes the future skin layer 10 (see FIGS. 2 and 3), the translucent material C of the first mortar 10 tends to exist on the surface of the skin layer 10. Thereby, it is easy to manufacture the light emitting tile P (see FIG. 2 and FIG. 3) in which the surface of the skin layer 10 exposes the translucent material C on the surface. In addition, about Example 2, it decorated with the inkjet.

(Second step)
Next, a unit 20 shown in FIG. 1B is prepared. In this unit 20, as shown in FIG. 4, the solar cell module 21 is fixed to the tips of the four columns 20 a having the same length provided in parallel with each other at equal intervals. A substrate 20b is provided between the left and right support columns 20a, and LED lamps 23 are provided at both ends of the substrate 20b. As shown in FIG. 1 (B), the tips of both LED lamps 23 are flush with the surface of the solar cell module 21. The solar cell module 21 and the substrate 20b are connected to a control circuit 22 having a constant voltage circuit, a storage battery, and an oscillation circuit. And this unit 20 is mounted on each 1st mortar 10 in the cavity 1a. About Examples 1-3, the unit 20 is pressed toward the bottom face of the cavity 1a, and the thickness of the 1st mortar 10 from the surface of the solar cell module 21 is made small.

(Third step)
And as shown in FIG.1 (C), the 2nd mortar 30 which consists of the mixing | blending of Examples 1-3 and the comparative examples 1 and 2 in the said Table 1 is prepared, and the 1st mortar 10 and the unit 20 in the cavity 1a are prepared. The second mortar 30 is poured onto the top. At this time, since each solar battery cell is sealed in the solar battery module 21, no problem occurs even if it is buried in the second mortar 30.

(4th process)
After in-mold curing for 8 hours in this state, the molded body P is removed from the molding mold 1, and the molded body P is further cured at room temperature for 4 hours to solidify the first mortar 10 and the second mortar 30. . Thereafter, the surface of the molded body P is polished with a surface grinder.

  The molded product P of Examples 1 to 3 is shown in FIG. 2 and FIG. 3, and the molded product P of Examples 1 to 3 is polished as shown by the alternate long and short dash line so that the translucent material C is exposed on the surface. To do. Thus, as shown in FIGS. 4 and 5, the light emitting tiles P of Examples 1 to 3 and Comparative Examples 1 and 2 are obtained.

  For each light-emitting tile P, the thickness (mm) and light transmittance (%) of the skin layer 10 were measured, and the appearance of the unit 20 was judged from the outside to see whether the unit 20 was visible. Further, in February 2002, each light-emitting tile P was left outdoors for a certain period of time (the parentheses indicate a time zone), and an LED lamp based on the electromotive force of the solar cell module 21 that would have been obtained thereby. A confirmation test of how many hours 23 can continue blinking was also conducted. The results are shown in Table 2.

  From Table 2, the light-emitting tiles P of Examples 1 to 3 exhibit excellent design properties because the matrix M of the skin layer 10 hides the unit 20 from the outside invisible. In addition, it can be seen that the light emitting tiles P of Examples 1 to 3 can be illuminated and guided by the LED lamp 23 without any external power supply and exhibit particularly excellent utility.

  That is, in the light emitting tiles P of Examples 1 to 3, as shown in FIG. 3, the skin layer 10 has an infinite number of translucent materials C dispersed in the matrix M, and these translucent materials C are supplied from the outside. Light reception by the solar cell module 21 and guidance of the light from the LED lamp 23 to the outside are allowed. In these light emitting tiles P, since the thickness of the skin layer 10 is 2 to 6 mm, many translucent materials C are exposed on the surface of the light emitting tiles P, and the solar cell modules 21 and the LED lamps 23 This is because they are touching at a surface or a point. For this reason, even if the conversion efficiency is lowered by the matrix M, the solar cell module 21 can still maintain a sufficient conversion efficiency by sunlight or the like irradiated through the light-transmitting material C of the skin layer 10.

  In particular, in the light-emitting tiles P of Examples 1 to 3, the light-transmitting material C has a refractive index of 1.51, and the sunlight is difficult to be totally reflected on the surface of the light-transmitting material C and easily reaches the solar cell module 21. Conceivable. Further, since the surface of the skin layer 10 exposes the translucent material C on the surface, sunlight easily reaches the solar cell module 21 from the surface. Furthermore, since the matrix M is mainly made of white cement, sunlight is not absorbed by the matrix M and can easily reach the solar cell module 21 via the translucent material C. For this reason, in the light emitting tile P of Examples 1-3, the conversion efficiency of the solar cell module 21 is high. Moreover, the light of the LED lamp 23 is also easily irradiated to the outside from the surface of the translucent material C.

  Therefore, the light emitting tiles P of Examples 1 to 3 can also exhibit excellent design properties while maintaining usefulness. Moreover, the light emitting tile P of Examples 1-3 is provided with the unit 20 and the main-body part 40 which incorporates this and makes the external shape as a building material, The fixing | fixed part 30 of the main-body part 40 is cement type, Since the matrix M of the skin layer 10 of the portion 40 is also cement-based, the fixing portion 30 and the skin layer 10 are firmly adhered to each other and exhibit strength as a building material.

On the other hand, the light-emitting tiles P of Comparative Examples 1 and 2 have not been able to blink the LED lamp 23 even when left for a certain period of time outdoors. This is because in the light emitting tile P of Comparative Example 1, the thickness of the skin layer 10 is relatively thick at 12 mm, so that many light-transmitting materials C are not exposed on the surface of the light emitting tile P or are solar cell modules. This is because 21 and the LED lamp 23 are not in contact with each other at a surface or a point. For this reason, the translucent material C cannot accept the light reception of the solar cell module 21 from the outside, and cannot guide the light of the LED lamp 23 to the outside. Moreover, in the light emitting tile P of the comparative example 2, it is because the 1st mortar 10 does not contain the translucent material C. FIG.
“Embodiment 2”

(First step)
As in the first embodiment, glass particles, white cement and silica sand as the translucent material C are prepared and mixed in the proportions shown in Table 1, and the first mortars 10 of Examples 1 to 3 and Comparative Examples 1 and 2 are used. (See FIG. 1).

  6A is prepared, and each first mortar 10 is poured into the bottom surface of the cavity 1a of the mold 1 as in the first embodiment.

(Second step)
Next, a unit 50 shown in FIG. 6B is prepared. In this unit 50, as shown also in FIG. 8, the solar cell modules 51 are fixed to the tips of four columns 50a each having the same length provided in parallel with each other at equal intervals. Moreover, the board | substrate 50b ranging over both the solar cell modules 51 is provided in the middle of the eight support | pillar 50a, and the LED lamp apparatus 53 is provided in the both ends of the board | substrate 50b. As shown in FIG. 6B, the LED lamp device 53 is obtained by fixing a plastic rod as the guide member 53b to the light emitting portion of the LED lamp 53a. The leading end of the guide member 53b protrudes 2 to 6 mm from the surface and height of the solar cell modules 51. The solar cell module 51 and the substrate 50b are connected to a control circuit 52 having a constant voltage circuit, a storage battery, and an oscillation circuit. And this unit 50 is mounted on each 1st mortar 10 in the cavity 1a. In the first to third embodiments, the unit 50 is pressed toward the bottom surface of the cavity 1a so that the tip of the guide member 53b hits the bottom surface of the cavity 1a.

(Third step)
And as shown in FIG.6 (C), the 2nd mortar 30 which consists of the mixing | blending of Examples 1-3 and the comparative examples 1 and 2 in the said Table 1 is prepared, the 1st mortar 10 in the cavity 1a, and the unit 50 are prepared. The second mortar 30 is poured onto the top.

(4th process)
As in the first embodiment, the first mortar 10 and the second mortar 30 are solidified. Thereafter, the surface of the molded body P is polished with a surface grinder. The molded bodies P of Examples 1 to 3 are polished as shown in FIG. 7 so that the translucent material C and the guide member 53b are exposed on the surface. Thus, as shown in FIGS. 8 and 9, the light emitting tiles P of Examples 1 to 3 and Comparative Examples 1 and 2 are obtained. Other conditions are the same as in the first embodiment.

  Thereby, the light emitting tile of Examples 1-3 in which the guide member 53b of the skin layer 10 guides the light of the LED lamp 53a to the outside can be manufactured. The light emitting tiles P of Examples 1 to 3 can achieve the same effects as the first embodiment.

  In the first and second embodiments, the second mortar 30 is the same as the first mortar 10, but this is not necessarily the case. In Examples 1 to 3 of the first and second embodiments, even if the first mortar 10 of the comparative example 2 is adopted as the second mortar 30, the same operational effects can be obtained, but rather the manufacturing cost can be reduced. Can be realized. Moreover, in the light emitting tile P of these forms, even if it has about ten LED lamps 23 in total, each can emit light.

  Moreover, in the said Embodiment 1, 2, although this invention was actualized to the light emission tile P which has the control circuit 22 and the LED lamp 23, it is with a solar cell only by fixing only the solar cell module 21 in the fixing | fixed part 30. It can also be used as a building material. In this case, it is possible to output electric power from the building material with solar cells to the outside by providing a pair of output cables extending from the solar cell module 21 to the outside.

  The present invention can be used for light-emitting tiles, light-emitting sidings, and the like and methods for producing them.

It is sectional drawing of the shaping | molding die etc. which show the manufacturing method of the light emitting tile of Embodiment 1, FIG. (A) is sectional drawing at the time of 1st process, FIG. (B) is sectional drawing at the time of 2nd process, FIG. (C). These are sectional views at the time of the third step. FIG. 3 is an enlarged cross-sectional view of a main part of the molded body according to the first embodiment. 4 is an enlarged cross-sectional view of a main part of the light emitting tile according to Embodiment 1. FIG. FIG. 4 is a plan view of the light emitting tile according to the first embodiment. FIG. 4 is a cross-sectional view of the light emitting tile according to the first embodiment. It is sectional drawing of the shaping | molding die etc. which show the manufacturing method of the light emitting tile of Embodiment 2, FIG. (A) is sectional drawing at the time of 1st process, FIG. (B) is sectional drawing at the time of 2nd process, FIG. (C). These are sectional views at the time of the third step. FIG. 10 is an enlarged cross-sectional view of a main part of a light emitting tile according to the second embodiment. FIG. 10 is a plan view of a light emitting tile according to the second embodiment. 6 is a cross-sectional view of a light emitting tile according to Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 21, 51 ... Solar cell module 40 ... Main-body part 30 ... Fixed part, 2nd mortar M ... Matrix C ... Translucent material 10 ... Skin layer, 1st mortar 22, 52 ... Control circuit 23, 53a ... LED lamp 53b ... Guide Member 1a ... Cavity P ... Light emitting tile (Building material with solar cell)
53 ... LED lamp device

Claims (9)

A solar cell module, and a main body portion that incorporates the solar cell module and forms an outer shape as a building material,
The main body portion is a cement-based fixing portion for fixing the solar cell module;
A cement-based matrix provided integrally with the fixing portion on the surface side of the fixing portion and concealing the solar cell module from the outside so as not to be visible from the outside, and light reception of the solar cell module from the outside dispersed in the matrix The building material with a solar cell characterized by comprising the skin layer comprised by the translucent material which accept | permits.   The building material with a solar cell according to claim 1, wherein the translucent material has a refractive index of 1.51 or less.   The building material with a solar cell according to claim 1 or 2, wherein the surface of the skin layer exposes the translucent material on the surface. A control circuit connected to the solar cell module; and an LED lamp connected to the control circuit and capable of emitting light based on an electromotive force of the solar cell module;
The main body also incorporates the control circuit and the LED lamp,
The fixing part also fixes the control circuit and the LED lamp,
The building material with a solar cell according to any one of claims 1 to 3, wherein the translucent material of the skin layer guides the light of the LED lamp to the outside. A control circuit connected to the solar cell module; and an LED lamp connected to the control circuit and capable of emitting light based on an electromotive force of the solar cell module;
The main body also incorporates the control circuit and the LED lamp,
The fixing part also fixes the control circuit and the LED lamp,
4. The building material with solar cell according to claim 1, wherein the skin layer has a guide member that is provided in the matrix and guides light of the LED lamp to the outside. 5. . Preparing a first mortar formed by mixing a cement raw material and a translucent material, and pouring the first mortar into the bottom surface of the cavity;
A second step of placing a solar cell module on the first mortar in the cavity;
A third step of preparing a second mortar obtained by mixing a cement raw material, and pouring the second mortar over the first mortar and the solar cell module in the cavity;
A fourth method of solidifying the first mortar and the second mortar to obtain a building material with solar cell, and a method for producing a building material with solar cell. In the second step, a control circuit and an LED lamp are also placed on the first mortar in the cavity,
The building material with a solar cell according to claim 6, wherein, in the third step, the second mortar is poured onto the first mortar, the solar cell module, the control circuit, and the LED lamp in the cavity. Production method. In the second step, an LED lamp device in which a guide member capable of guiding light to the outside is fixed to the light emitting portion of the LED lamp, a control circuit is placed on the first mortar in the cavity, and the Inserting the guide member of the LED lamp device into the first mortar;
The building material with solar cell according to claim 6, wherein, in the third step, the second mortar is poured onto the first mortar, the solar cell module, the control circuit, and the LED lamp device in the cavity. Manufacturing method.   The method for producing a building material with a solar cell according to any one of claims 6 to 8, wherein in the fourth step, the surface of the skin layer is polished so that the light-transmitting material is exposed on the surface.

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