JP2017199885A - Solar power generation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible type solar power generation unit which is excellent in weather resistance by arranging it at a position where exposure to direct light or wind and rain can be suppressed while maintaining power generation efficiency.SOLUTION: The solar power generation unit is so configured that roof members 2 arranged sequentially with overlapping portions along an inclined direction of a roof 20 having an inclined surface of a building. A reflection plate 3 is provided on the upper surface 2a of the roof member 2. A dye sensitized solar cell 10 is provided on a lower surface 2b to be separated from the reflection plate 3. Gaps S are formed between the overlapping roof members 2, 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a photovoltaic power generation unit including a dye-sensitized solar cell.

Conventionally, as a dye-sensitized solar cell, a transparent substrate on which a transparent electrode is formed, a counter electrode substrate on which a counter electrode is formed, and a sensitizing dye supported on a porous semiconductor material formed on the transparent electrode A liquid layer or a quasi-liquid electrolyte provided between the semiconductor layer and the counter electrode, and a sealing material that seals the electrolyte and fixes the transparent substrate and the counter electrode substrate. There is a thing of the structure provided.
As such a dye-sensitized solar cell, for example, a flexible type as shown in Patent Document 1, which has a small individual weight and is thin, is known.

  Patent Document 1 describes an electric module in which a plurality of cells of a dye-sensitized solar cell are electrically connected by a flexible connecting member having flexibility.

JP 2011-8962 A

Since the conventional flexible dye-sensitized solar cell described above can be installed at various locations, for example, when installed outdoors, it is not easily damaged by sudden loads caused by changes in weather, etc. It is demanded. In addition, it is demanded that it is difficult to deteriorate and breakage in an environment exposed to sunlight and wind and rain.
However, because a flexible resin sheet is used for the exterior material of the flexible type dye-sensitized solar cell as described above, the durability against weather changes such as heat, ultraviolet rays, and wind and rain due to direct light, Durability to be exposed to the outdoors for a long period of time (hereinafter, both durability is sometimes referred to as weather resistance) is not satisfactory, and there is room for improvement in that respect.
Furthermore, it is conceivable that the light-receiving surface of the dye-sensitized solar cell is simply covered with a protective material such as a protective film, but the power generation efficiency may be reduced.

  This invention is made | formed in view of the problem mentioned above, and it aims at providing the flexible type solar power generation unit excellent in a weather resistance, maintaining a power generation efficiency.

  In order to achieve the above object, the photovoltaic power generation unit according to the present invention is configured such that the light receiving surface of the dye-sensitized solar cell is not exposed to direct sunlight, and a mounted member including a reflective surface, A dye-sensitized solar cell provided apart from the attached member, and an attachment member having a shielding surface shielded from the outside on the opposite surface of the light-receiving surface of the dye-sensitized solar cell. The dye-sensitized solar cell is characterized by being arranged with the opposite surface facing the shielding surface side of the mounting member.

In the present invention, sunlight is reflected toward the light-receiving surface of the dye-sensitized solar cell by the reflection surface provided on the attached member, and the indirect reflected light is received by the dye-sensitized solar cell to generate power. be able to.
Since the light receiving surface of the dye-sensitized solar cell is attached to the shielding surface side of the mounting member, it is possible to prevent or suppress excessive sunlight from directly entering the light receiving surface, and the light receiving surface is heated by sunlight. It is possible to prevent exposure to ultraviolet rays and the like. Therefore, deterioration and breakage on the light receiving surface can be suppressed while maintaining power generation efficiency, and durability (weather resistance) can be improved. Furthermore, since the light-receiving surface of the dye-sensitized solar cell is not exposed to the outside, it is possible to suppress a decrease in power generation efficiency due to dirt adhering to the light-receiving surface due to exposure to wind and rain.
As described above, in the present invention, since the dye-sensitized solar cell is configured to generate power by reflected light, the dye-sensitized solar cell can be disposed indoors without being affected by the weather conditions.
Furthermore, in the present invention, the amount of light received by the dye-sensitized solar cell can be increased by appropriately adjusting the area of the reflecting surface, and the power generation efficiency can be improved.

  Moreover, the solar power generation unit according to the present invention may be characterized in that direct light of the sun does not strike the light receiving surface of the dye-sensitized solar cell.

  In this case, it is possible to prevent the light receiving surface from being deteriorated or damaged due to heat, ultraviolet rays or the like due to direct light, and to improve the weather resistance of the dye-sensitized solar cell.

  Moreover, the photovoltaic power generation unit according to the present invention is a roof member in which the attached member and the attachment member are sequentially arranged with overlapping portions along the inclination direction of the roof having the inclined surface of the building. Further, a light capturing space is formed between the overlapping roof members, the reflective surface is provided on the upper surface of the roof member, and the dye-sensitized solar cell is provided on the lower surface.

In this case, sunlight is directed to the light-receiving surface of the dye-sensitized solar cell provided on the lower surface of the other roof member that overlaps above the one roof member by the reflecting surface provided on the upper surface of the one roof member. By reflecting the light, the dye-sensitized solar cell can receive indirect reflected light and generate electric power. In this case, since the light capturing space is formed between the roof members that overlap each other, the dye-sensitized solar cell surely reflects the reflected light corresponding to the incident angle of sunlight on the reflecting surface that changes depending on the position of the sun. Can be reflected toward the light receiving surface.
Thus, in this invention, the electric power generation efficiency of a dye-sensitized solar cell can be improved using the roof member provided in the roof of a building.

  Moreover, the solar power generation unit which concerns on this invention WHEREIN: The said reflective surface may be formed from another dye-sensitized solar cell which has a reflective function in the light-receiving surface side.

  In this case, since the reflecting surface constitutes another dye-sensitized solar cell, the other dye-sensitized solar cell itself can generate electric power. Furthermore, since the sunlight incident on the light receiving surface of this another dye-sensitized solar cell can be reflected toward the light receiving surface of one dye-sensitized solar cell fixed to the mounting member, the photovoltaic power generation unit The power generation capacity as a whole can be increased.

  Moreover, the solar power generation unit according to the present invention may be characterized in that the reflecting surface is covered with a protective material or an ultraviolet absorber.

  In this case, since the reflective surface exposed to the outdoors and exposed to direct sunlight or wind and rain is covered with the protective material, it is possible to improve the weather resistance accompanying such a change in weather. Therefore, the reflection performance on the reflection surface can be maintained, and a decrease in the amount of reflected light with respect to sunlight incident on the reflection surface can be suppressed. Moreover, it can reduce that an ultraviolet-ray hits a solar cell. Therefore, deterioration of the power generation efficiency of the solar cell can be reduced.

  In addition, a photovoltaic power generation unit according to the present invention includes a mounted member, and a dye-sensitized solar cell that is provided apart from the mounted member and has a light receiving surface facing the mounted member, A light taking-in space is formed between the attached member and the dye-sensitized solar cell, and a light guide part for guiding external light to the light taking-in space is provided.

In the photovoltaic power generation unit according to the present invention, external light such as sunlight is guided to the light capturing space by the light guiding portion provided in the light capturing space formed between the attached member and the dye-sensitized solar cell. Indirect light emitted from the light guide portion can be received by the light receiving surface of the dye-sensitized solar cell to generate electric power.
In this case, the light-receiving surface of the dye-sensitized solar cell can be disposed at a place shielded from the outside, so that excessive sunlight can be prevented or suppressed from directly entering the light-receiving surface. It is possible to prevent the surface from being exposed to heat from sunlight, ultraviolet rays, and wind and rain. Therefore, deterioration and breakage on the light receiving surface can be suppressed while maintaining power generation efficiency, and durability (weather resistance) can be improved. Furthermore, since the light-receiving surface of the dye-sensitized solar cell can be configured not to be exposed to the outside, it is possible to suppress a decrease in power generation efficiency due to dirt adhering to the light-receiving surface due to exposure to wind and rain.
As described above, in the present invention, since the dye-sensitized solar cell is configured to generate power by light emission from the light guide unit, the dye-sensitized solar cell can be disposed indoors without being affected by weather conditions.
Furthermore, in the present invention, the amount of light received by the dye-sensitized solar cell can be increased according to the form of the light guide section, and the power generation efficiency can be improved.

  According to the solar power generation unit of the present invention, it is possible to provide a flexible type that is excellent in weather resistance by being disposed at a position where it is possible to suppress exposure to direct light, wind and rain, for example, while maintaining power generation efficiency. Can do.

It is a perspective view which shows the structure of the solar energy power generation unit by the 1st Embodiment of this invention. It is sectional drawing which expanded the structure of the photovoltaic power generation unit shown in FIG. 1 partially. It is a fragmentary sectional view which shows the structure of the dye-sensitized solar cell of the solar power generation unit shown in FIG. It is a side view which shows the structure of the solar energy power generation unit by 2nd Embodiment.

  Hereinafter, a solar power generation unit according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG.1 and FIG.2, the solar power generation unit 1 of this Embodiment is the roof member 2 (attachment member) provided with the reflecting plate 3 (reflecting surface), and the reflecting plate 3 of this roof member 2. And a film-type dye-sensitized solar cell 10 provided in a spaced manner.

The roof member 2 is a long plate-shaped well-known tile member, and the roof member 2 is provided only on one inclined surface of the roof 20 in FIG. Are arranged with an overlapping portion in the vertical direction. A predetermined gap S (light capturing space) is formed between the roof members 2 and 2 that overlap each other. For the reflector 3, an appropriate member having high light reflection efficiency such as tin or aluminum is employed. Alternatively, the glass may be coated with aluminum or the like.
Here, in the roof member 2, the upward surface exposed outdoors is referred to as an upper surface 2a, and the downward rear surface is referred to as a lower surface 2b (shielding surface).

  1 and 2, the reflector 3 is disposed over the entire upper surface 2a of the roof member 2, but may be partially disposed in the upper surface 2a. In short, the reflection plate 3 is arranged so that the reflected light L2 reflected from the sunlight L1 is directed to the lower surface 2b (shielding surface) side of another plate-like member 2 that overlaps the roof member 2 above. Just do it.

On the lower surface 2b shielded from the outside of the roof member 2, the dye-sensitized solar cell 10 is disposed with the light receiving surface 10a facing downward. On the opposite surface 10b opposite to the light receiving surface 10a of the dye-sensitized solar cell 10, the roof member 2 (attachment member) is provided. That is, the reflecting plate 3 is disposed on the upper surface 2a of the roof member 2, and the dye-sensitized solar cell 10 is disposed on the lower surface 2b.
In the present embodiment, the reflecting plate 3 is provided. However, the reflecting plate 3 may be omitted, and in this case, the upper surface 2a of the roof member 2 is a reflecting surface. Further, instead of the reflecting plate 3, the upper surface 2a of the roof member 2 may be covered with a reflecting film.

  The light receiving surface 10a of the dye-sensitized solar cell 10 is disposed to face the reflecting plate 3, and the reflected light L2 reflected by the reflecting plate 3 is received. In addition, since the dye-sensitized solar cell 10 is arrange | positioned at the lower surface 2b side of the roof member 2 which is not directly exposed to the outdoors, the direct light of the sun does not hit the light-receiving surface 10a.

Although the structure of the dye-sensitized solar cell 10 is not specifically limited, The structure is demonstrated using FIG.
The dye-sensitized solar cell 10 is an electric module in which a semiconductor electrode 11 and a counter electrode 12 are disposed to face each other through a conductive material (not shown) having a sealing function. In the present embodiment, various cells that require sealing of a plurality of cells formed between the first base material 13 and the second base material 14 and electrical series connection or parallel connection between the cells are used. Intended for electrical modules.
The dye-sensitized solar cell 10 of the present embodiment is a dye-sensitized solar cell via terminals taken out from the cells located at both ends in the length direction of the dye-sensitized solar cell 10 among the cells connected in series. It is configured to be connected to a terminal box provided outside the battery.

Specifically, the dye-sensitized solar cell 10 includes a first base material 13, a second base material 14, a semiconductor electrode 11, a counter electrode 12, an electrolyte 15, and a conductive material (not shown). Yes.
The semiconductor electrode 11 includes a transparent conductive film 11A stacked on the first base material 13, and a porous semiconductor layer 11B stacked on the transparent conductive film 11A.
The counter electrode 12 includes a counter conductive film 12A stacked on the second base material 14, and a catalyst layer (not shown) stacked on the counter conductive film 12A.

Sealing materials 16 are disposed on both sides of the conductive material of the dye-sensitized solar cell 10. The conductive material and the sealing material 16 bond the electrodes (that is, between the semiconductor electrode 11 and the counter electrode 12). A gap is formed in the thickness direction between the semiconductor electrode 11 and the counter electrode 12 by the conductive particles contained in the conductive material, and the electrolyte 15 is sealed in the gap.
The conductive material is in direct contact with the transparent conductive film 11A and the counter conductive film 12A that constitute the semiconductor electrode 11 and the counter electrode 12. A plurality of patterning portions insulated by laser irradiation or the like are provided at predetermined locations of the transparent conductive film 11A and the counter conductive film 12A.

The material of the 1st base material 13 and the 2nd base material 14 is not specifically limited, For example, insulators, such as resin, a semiconductor, a metal, glass, etc. are mentioned. Examples of the resin include poly (meth) acrylic acid ester, polycarbonate, polyester, polyimide, polystyrene, polyvinyl chloride, and polyamide. From the viewpoint of producing a thin and light flexible dye-sensitized solar cell 10, the base material is preferably made of a transparent resin, more preferably a polyethylene terephthalate (PET) film or a polyethylene naphthalate (PEN) film. . The material of the first substrate 13 and the material of the second substrate 14 may be different.

  The types and materials of the transparent conductive film 11A and the counter conductive film 12A are not particularly limited, and a conductive film used for a known dye-sensitized solar cell can be applied. For example, a thin film made of a metal oxide is used. Can be mentioned. Examples of the metal oxide include tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (ATO), indium oxide / zinc oxide (IZO), and gallium-doped zinc oxide (GZO). it can.

The semiconductor layer 11B is made of a material that can receive electrons from the adsorbed photosensitizing dye, and is usually preferably porous. The material which comprises the semiconductor layer 11B is not specifically limited, The material of the well-known semiconductor layer 11B is applicable, For example, metal oxide semiconductors, such as a titanium oxide, a zinc oxide, a tin oxide, are mentioned.
The photosensitizing dye supported on the semiconductor layer 11B is not particularly limited, and examples thereof include known dyes such as organic dyes and metal complex dyes. Examples of the organic dye include coumarin, polyene, cyanine, hemicyanine, and thiophene. As said metal complex pigment | dye, a ruthenium complex etc. are used suitably, for example.

  The material constituting the catalyst layer is not particularly limited, and a known material can be applied. For example, carbons such as platinum and carbon nanotubes, poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonic acid) ) (PEDOT / PSS) and other conductive polymers.

The electrolyte 15 is not particularly limited, and an electrolyte used in a known dye-sensitized solar cell can be applied. Examples of the electrolyte 15 include an electrolytic solution in which iodine and sodium iodide are dissolved in an organic solvent.
A well-known photosensitizing dye (not shown) is adsorbed on the surface of the semiconductor layer 11B in contact with the electrolyte 15 including the porous interior.

  As the conductive material, for example, at least one selected from a conductive wire, a conductive tube, a conductive foil, a conductive plate and a conductive mesh, and a conductive paste is used. Here, the conductive paste is a conductive material having a relatively low rigidity and a soft form. For example, the conductive paste may have a form in which a solid conductive material is dispersed in a viscous dispersion medium such as an organic solvent or a binder resin. The conducting material 6 may have both functions of conduction and adhesion like a double-sided adhesive type copper tape. Furthermore, examples of the conductive material include metals such as gold, silver, copper, chromium, titanium, platinum, nickel, tungsten, iron, and aluminum, or alloys of two or more of these metals. Not. Examples of the material also include resin compositions such as polyurethane and polytetrafluoroethylene (PTFE) in which conductive fine particles (for example, fine particles of the metal or alloy, fine particles of carbon black, etc.) are dispersed.

The sealing material 16 is a non-conductive member capable of adhering the first base material 13 and the second base material 14 facing each other and sealing a cell formed between the base materials 13 and 14. If there is no particular limitation. Examples of the material of the sealing material 16 include temporary materials such as a hot melt adhesive (thermoplastic resin), a thermosetting resin, an ultraviolet curable resin, and a resin including an ultraviolet curable resin and a thermosetting resin. And a resin material that has fluidity and is solidified by an appropriate treatment. Examples of the hot melt adhesive include polyolefin resin, polyester resin, polyamide resin, and the like. Examples of the thermosetting resin include an epoxy resin and a benzoxazone resin. Examples of the ultraviolet curable resin include those containing a photopolymerizable monomer such as acrylic acid ester and methacrylic acid ester.

Next, the effect | action of the solar power generation unit 1 mentioned above is demonstrated in detail using drawing.
In the present embodiment, as shown in FIG. 2, sunlight L <b> 1 is reflected by the reflector 3 provided on the upper surface 2 a of one roof member 2, and the lower surface of the other roof member 2 is superimposed above the one roof member 2. The indirect reflected light L2 is received by the dye-sensitized solar cell 10 by being reflected toward the light-receiving surface 10a of the dye-sensitized solar cell 10 provided in 2b and spaced apart from the reflecting plate 3. It can generate electricity.

  And since the light-receiving surface 10a of the dye-sensitized solar cell 10 is attached to the lower surface 2b side of the roof member 2, it can prevent or suppress that excessive sunlight (direct light) directly enters into the light-receiving surface 10a. The light receiving surface 10a can be prevented from being exposed to heat, ultraviolet rays, and wind and rain caused by the sunlight L1. Therefore, deterioration and breakage in the light receiving surface 10a can be suppressed while maintaining power generation efficiency, and durability (weather resistance) can be improved. Furthermore, since the light receiving surface 10a of the dye-sensitized solar cell 10 is not exposed to the outside, it is possible to suppress a decrease in power generation efficiency due to contamination of the light receiving surface 10a due to exposure to wind and rain.

Moreover, in the case of this Embodiment, since the clearance gap S used as the light taking-in space is formed between the roof members 2 and 2 which mutually overlap, the sunlight L1 in the reflecting plate 3 which changes according to the position of the sun. The reflected light L2 can be reliably reflected toward the light receiving surface 10a of the dye-sensitized solar cell 10 corresponding to the incident angle.
Moreover, in this Embodiment, the improvement of the electric power generation efficiency of the dye-sensitized solar cell 10 can be aimed at using the roof member 2 provided in the roof 20 of a building.

Thus, in this embodiment, since the dye-sensitized solar cell 10 is configured to generate power using the reflected light L2, the dye-sensitized solar cell 10 can be disposed indoors without being affected by the weather conditions. .
Furthermore, in this Embodiment, the light-receiving amount of the dye-sensitized solar cell 10 can be increased by adjusting the area of the reflecting plate 3 suitably, and electric power generation efficiency can be improved.

  As described above, in the present embodiment, it is possible to provide a flexible type that is excellent in weather resistance, for example, by being arranged at a position where exposure to direct light or wind and rain can be suppressed while maintaining power generation efficiency. .

  Next, another embodiment of the photovoltaic power generation unit of the present invention will be described with reference to the accompanying drawings. The same reference numerals are used for members or parts that are the same as or similar to those of the first embodiment described above. Description is omitted, and a configuration different from the first embodiment will be described.

(Second Embodiment)
A photovoltaic power generation unit 1A according to the second embodiment shown in FIG. 4 is provided on the ceiling portion 22 (attached member) of the building and the lower surface 20a of the roof 20 and is installed separately from the ceiling portion 22, and the ceiling A dye-sensitized solar cell 10 having a light-receiving surface 10a facing the portion 22, and an attic space 23 (light capturing space) is formed between the ceiling portion 22 and the dye-sensitized solar cell 10 (roof 20). The optical fiber tube 4 (light guide unit) that guides external light (sunlight L1) to the attic space 23 is provided. Here, in the present embodiment, the sunlight L1 is not directly incident on the attic space 23.

The optical fiber tube 4 is a known one having a core and a clad surrounding the core, and is disposed in a range below the dye-sensitized solar cell 10 in the attic space 23. One end 4 a of the optical fiber tube 4 is connected to a light collecting portion 41 provided on the outdoor roof 20. The condensing part 41 condenses sunlight L1 (external light) as a light source of the optical fiber tube 4. The optical fiber tube 4 is in a state where it is exposed without a covering material at least in a portion disposed in the attic space 23, and sunlight L1 collected by the light collecting unit 41 is emitted radially from the entire circumference of the tube. It is configured to emit light.
In addition, the number, arrangement | positioning, etc. of the optical fiber tube 4 can be set according to conditions, such as the magnitude | size and position of the dye-sensitized solar cell 10, and the width of the attic space 23.

  In the photovoltaic power generation unit 1A according to the second embodiment configured as described above, as shown in FIG. 4, the photovoltaic power generation unit 1A is provided in the attic space 23 formed between the roof 20 and the dye-sensitized solar cell 10. Light outside the sunlight L1 is guided to the attic space 23 by the optical fiber tube 4, and indirect light emitted from the optical fiber tube 4 is received by the light receiving surface 10a of the dye-sensitized solar cell 10 to generate power. it can.

  In the present embodiment, the light receiving surface 10a of the dye-sensitized solar cell 10 can be disposed in the attic space 23 shielded from the outside, so that excessive sunlight is not directly incident on the light receiving surface 10a. Alternatively, the light receiving surface 10a can be prevented from being exposed to heat, ultraviolet rays, and wind and rain caused by sunlight L1. Therefore, deterioration and breakage in the light receiving surface 10a can be suppressed while maintaining power generation efficiency, and durability (weather resistance) can be improved. Furthermore, since the light-receiving surface 10a of the dye-sensitized solar cell 10 can be configured not to be exposed to the outside, it is possible to suppress a decrease in power generation efficiency due to dirt adhering to the light-receiving surface 10a due to exposure to wind and rain. it can.

As described above, in the present embodiment, the dye-sensitized solar cell 10 is configured to generate power by the light emission of the optical fiber tube 4, and thus the dye-sensitized solar cell 10 can be disposed indoors without being affected by the weather conditions. It is.
Furthermore, the amount of light received by the dye-sensitized solar cell 10 can be increased in accordance with the shape of the light guide section such as the optical fiber tube 4, and the power generation efficiency can be improved.

Further, when the light L3 can be emitted radially like the optical fiber tube 4 of the present embodiment, the mounting position of the dye-sensitized solar cell 10 is also limited to the lower surface of the roof 20 as in the present embodiment. If the light receiving surface 10a can be arranged at a position facing the optical fiber tube 4, it can be installed at another position.
For example, in the case of the optical fiber tube 4 as in the present embodiment, since the light L3 is emitted radially from the entire circumference thereof, the light receiving surface 10a is set on the inner peripheral side so as to surround the periphery of the optical fiber tube 4. It is also possible to install the dye-sensitized solar cell 10 in a cylindrical shape.

In the second embodiment, the optical fiber tube 4 is employed as the light guide unit that guides the sunlight L1 to the light capturing space that is the attic space 23. However, the present invention is not limited to this. For example, instead of the optical fiber tube 4 as the light guide portion, a reflecting plate may be adopted. The reflecting plate is appropriately disposed in the light capturing chamber, and the outdoor sunlight L1 is dye-sensitized sun in the light capturing chamber. It is also possible to configure so as to face the light receiving surface 10a of the battery 10.
Further, an opening formed in the side wall of the roof 20 or the attic space 23 is simply used as a light guide, and sunlight L1 incident from the opening can be received by the light receiving surface 10a of the dye-sensitized solar cell 10. It may be.

  As mentioned above, although embodiment of the solar power generation unit by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.

  For example, the reflection plate 3 (reflection surface) of the first embodiment described above may be formed from another dye-sensitized solar cell having a reflection function on the light receiving surface 10a side. In this case, since the reflecting surface constitutes another dye-sensitized solar cell, the other dye-sensitized solar cell itself can generate electric power. Furthermore, since the sunlight incident on the light receiving surface of this another dye-sensitized solar cell can be reflected toward the light receiving surface of one dye-sensitized solar cell fixed to the mounting member, the photovoltaic power generation unit The power generation capacity as a whole can be increased.

  Further, in the case where the mounting member has a reflecting surface (reflecting plate 3) as in the first embodiment described above, the reflecting surface exposed to the outdoors and exposed to direct sunlight or wind and rain is a protective material. It may be covered. In this case, the reflective surface is covered with a protective material, and the weather resistance accompanying the change in weather can be improved, so that the reflective performance on the reflective surface can be maintained, and against the sunlight incident on the reflective surface A decrease in the amount of reflected light can be suppressed.

As the application target of the above-described photovoltaic power generation units 1 and 1A, the roof 20 of the building is the target. However, the roof 20 is not limited to the roof 20, and the outer wall of the building, the fence, the streetlight and the signboard, the dike, and the pier It can be applied to a simple structure such as a structure such as a storage room or a tent.
In addition, as the mounting position of the dye-sensitized solar cell 10 described above, the lower surface 2b of the roof member 2 is used in the first embodiment, and the lower surface of the roof 20 is used in the second embodiment. However, the mounting position is limited to this mounting position. As described above, it is appropriately selected according to the application target of the photovoltaic power generation units 1 and 1A. In short, the mounting position of the dye-sensitized solar cell 10 is a mounting member having a shielding surface shielded from the outside, which is disposed on the shielding surface side, and where the light receiving surface 10a faces the reflecting surface. It's fine.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1, 1A Photovoltaic power generation unit 2 Roof member (attached member, mounting member)
2a Upper surface 2b Lower surface (shielding surface)
3 reflector (reflective surface)
4 Optical fiber tube (light guide)
DESCRIPTION OF SYMBOLS 10 Dye-sensitized solar cell 10a Light-receiving surface 10b Opposite surface 11 Semiconductor electrode 11A Transparent conductive film 11B Semiconductor layer 12 Counter electrode 12A Counter conductive film 13 1st base material 14 2nd base material 15 Electrolyte 16 Sealing material 20 Roof 23 Attic space (Light capture space)
L1 Sunlight L2 Reflected light L3 Light from the light guide S S Gap (light capture space)

Claims (6)

A mounted member having a reflective surface;
A dye-sensitized solar cell provided apart from the attached member, and
The light-receiving surface of the dye-sensitized solar cell faces the reflective surface,
The opposite surface of the light-receiving surface in the dye-sensitized solar cell includes an attachment member having a shielding surface shielded from the outside,
The said dye-sensitized solar cell is arrange | positioned in the state which orient | assigned the said opposite surface to the shielding surface side of the said attachment member, The solar power generation unit characterized by the above-mentioned.   2. The solar power generation unit according to claim 1, wherein the light receiving surface of the dye-sensitized solar cell is not exposed to direct sunlight. The mounted member and the mounting member are roof members that are sequentially arranged with overlapping portions along the inclination direction of the roof having the inclined surface of the building,
A light capturing space is formed between the overlapping roof members,
The solar power generation unit according to claim 1 or 2, wherein the reflective surface is provided on an upper surface of the roof member, and the dye-sensitized solar cell is provided on a lower surface.   4. The photovoltaic power generation unit according to claim 1, wherein the reflection surface is formed from another dye-sensitized solar cell having a reflection function on the light receiving surface side. 5.   The solar power generation unit according to any one of claims 1 to 4, wherein the reflection surface is covered with a protective material or an ultraviolet absorber. A mounted member;
A dye-sensitized solar cell provided apart from the attached member and having a light-receiving surface facing the attached member;
With
A photovoltaic power generation unit, wherein a light taking-in space is formed between the attached member and the dye-sensitized solar cell, and a light guide unit that guides external light to the light taking-in space is provided.

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