JP2014179536A - Roll screen and roll screen apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll curtain including a solar cell whose life is hardly reduced and an organic electroluminescent apparatus that is hardly degraded.SOLUTION: A roll screen includes: a solar cell on one surface of a substrate and organic electroluminescent apparatus on the other surface, wherein the substrate includes a resin layer and a metal layer.

Description

  The present invention relates to a roll screen and a roll screen device having a solar cell and an organic electroluminescent device.

A solar cell is a clean energy source that can generate electric power with only sunlight and does not generate greenhouse gases such as CO ₂ . For example, Patent Document 1 proposes that a solar cell is provided in a window, sunlight is generated and charged from an energy source, and this electric power is used for light emission of an organic EL element for display. Further, in Patent Document 2, in a roll screen device disposed near a window in order to prevent sunlight from entering through a window or the like indoors, a solar screen is provided on a screen portion of the roll screen device in order to effectively utilize the sunlight to be shielded. It has been proposed to install a battery.

JP2011-119455A Japanese Patent Laid-Open No. 2008-042142

  However, in the configuration proposed in Patent Document 1, the organic EL element is directly arranged on the indoor side of the window. For example, if the window is covered with a screen, the organic EL element is blocked by the screen. Therefore, it cannot be used as a display device. Then, the present inventors pay attention to a roll screen with a solar cell as described in Patent Document 2, and by providing an organic electroluminescence device on the indoor side of the roll screen device, the roll screen covers the window. In the meantime, a roll screen with a solar cell that can be used as a lighting device or a display device was examined.

In the case of such a roll screen, a base material having a small film thickness is required for the roll screen in order to enable winding. However, according to the study by the present inventors, when the film thickness is small, the heat stored in the solar cell easily moves to the organic electroluminescent device, and as a result, the organic electroluminescent device is deteriorated and the life is shortened. It turns out that there is a possibility.
Then, the subject of this invention is providing the roll screen provided with the solar cell and organic electroluminescent apparatus which an organic electroluminescent apparatus does not deteriorate easily and lifetime does not occur easily.

In order to solve the above problems, the present inventors have studied a method for radiating heat stored in a solar cell, and have reached the present invention. That is, the gist of the present invention is as follows.
[1] A roll screen having a solar cell on one surface of a substrate and an organic electroluminescent device on the other surface, wherein the substrate includes a resin layer and a metal layer. Roll screen.
[2] The metal layer includes a first metal layer and a second metal layer, the first metal layer is disposed between the resin layer and the solar cell, and the second metal layer is The roll screen according to [1], which is disposed between the resin layer and the organic electroluminescent device.
[3] The roll screen according to any one of [1] or [2], wherein the ratio of the thickness of the metal layer to the thickness of the resin layer is 1/50 or more and 1/4 or less.
[4] The roll screen according to any one of [1] to [3], wherein the outermost layer on the light receiving surface side of the solar cell has an uneven shape.
[5] A roll screen device having the roll screen according to any one of [1] to [4], wherein winding is performed with a surface of the roll screen having the solar cell facing outward. Roll screen device.

  According to the present invention, in a roll screen having a solar cell and an organic electroluminescent device, the surface on the indoor side of the roll screen can be effectively used as a display device such as a display or illumination, and by the heat accumulated in the solar cell, It is possible to provide a roll screen and a roll screen device in which the characteristics of the organic electroluminescence device are hardly deteriorated.

It is a cross-sectional schematic diagram of the roll screen which concerns on embodiment of this invention. It is the external appearance schematic diagram which observed the roll screen apparatus which concerns on embodiment of this invention from the outdoor side. It is the external appearance schematic diagram which observed the roll screen apparatus which concerns on embodiment of this invention from the room inner side. 1 is an equivalent circuit diagram of an active matrix organic electroluminescence device according to an embodiment of the present invention. It is a cross-sectional schematic diagram of the roll screen apparatus which concerns on embodiment of this invention. It is a cross-sectional schematic diagram of the roll screen which concerns on embodiment of this invention. It is a cross-sectional schematic diagram of the roll screen which concerns on embodiment of this invention. It is a cross-sectional schematic diagram of the solar cell which concerns on embodiment of this invention. It is a cross-sectional schematic diagram of the organic electroluminescent apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following description, and it is easily understood by those skilled in the art that modes and details can be variously changed without departing from the spirit and scope of the present invention. Note that in the structures of the present invention described below, the same portions or portions having similar functions are denoted by the same reference numerals in different drawings, and description thereof is not repeated.

The roll screen according to the present invention is a roll screen having a solar cell 22 on at least one surface of a base material 21 and an organic electroluminescent device 23 on the other surface, as shown in FIG. The substrate 21 has a resin layer 24 and a metal layer 25. And as FIG. 5 shows, the roll screen which arrange | positions one surface of the roll screen which has the solar cell 22 toward the outdoor, and arrange | positions the other surface of the roll screen 31 which has the organic electroluminescent apparatus 23 facing indoors. By using the device, not only the light shielding function of the roll screen but also the power generated by the solar cell can be effectively used for the organic electroluminescence device.
Hereinafter, each configuration of the roll screen device will be described in detail.

<1. Roll screen device 35>
FIG. 2 shows the appearance of the roll screen device 35 according to the present invention observed from the outdoor side, and FIG. 3 shows the appearance of the roll screen device 35 observed from the indoor side.
As shown in FIG. 2, the two output terminals 34a and 34b included in the roll screen device 35 are connected to the input terminals 40a and 40b arranged on the surface of the roll screen on which the organic electroluminescent device is arranged, as will be described later. These terminals are electrically connected, and the electric power generated by the solar cell 22 is supplied to the organic electroluminescent device 23 through these terminals. The output terminals of the storage battery 33 (and the charge / discharge controller 32) are connected to the output terminals.

The charge / discharge controller 32 is a circuit that charges the storage battery 33 with electric power from the roll screen device 35 (electric power generated by 22 solar cells in the roll screen).
The roll screen device 35 includes a roll screen 31, a winding pipe 30 in which one end of the roll screen 31 is fixed to an outer peripheral surface thereof, a holding unit 29, and the like. The movable method may be electric or manual. In the case of manual operation, a kind of pull cord type (spring type) roll screen device can be provided.

  The holding part 29 is a unit for holding the winding pipe 30 in a rotatable form, in which a plurality of members are combined. When the roll screen device 35 is attached to the window, the holding portion 29 is arranged so that the surface on which the solar cell of the roll screen device is disposed faces the outdoor side, and the organic electroluminescent device faces the indoor side. It is fixed outside the window frame directly or via another member.

  The winding pipe 30 is a pipe-shaped member for winding the roll screen 31. If the outer diameter of the take-up pipe 30 is small, the roll screen 31 can be taken up in a compact manner, so that the size of the holding portion 29 can be reduced. However, if the outer diameter of the take-up pipe 30 is too small, the distortion in the roll screen 31 caused by the take-up increases, and as a result, the solar cell 22 and the organic matter are taken up when the roll screen 31 is taken up or unwound. The electroluminescent device 23 is easily damaged. However, if the outer diameter of the take-up pipe 30 is too large, the design and workability deteriorate as a result of the weight and size of the take-up pipe increasing. Therefore, the outer diameter of the take-up pipe is usually 500 mm or less, preferably 400 mm or less, more preferably 300 mm or less, still more preferably 200 mm or less, most preferably 100 mm or less, and usually 20 mm or more, preferably 22 mm or more, More preferably, it is 30 mm or more, more preferably 40 mm or more, still more preferably 50 mm or more, and most preferably 70 mm or more. In addition, although there is no special restriction | limiting in the constituent material of the winding pipe 30, For example, resin, such as metals, such as aluminum and SUS, polyester, an acryl, methacryl, hard vinyl chloride, is mentioned.

  In the winding pipe 30, an urging mechanism (not shown) for urging the winding pipe 30 with a rotational force in the winding direction of the roll screen 31 is provided. A brake mechanism (not shown) is provided in the winding pipe 30 so that the winding speed of the roll screen 31 is always equal to or lower than a predetermined speed (so as not to be excessively high). Further, in the winding pipe 30, the winding pipe 30 whose rotational force is biased by the biasing mechanism is in a state where only a part of the roll screen 31 is wound (a plurality of roll screens 31 having different pull-out amounts). A stop position control mechanism (not shown) is also provided for stopping in any of the above states. Note that these mechanisms can also be applied to existing roll screen devices. Further, a rotary connector (in this embodiment, a two-pole type) is also provided in the winding pipe 30. The two terminals on one side of the rotary connector are connected to a cable for supplying power to the charge / discharge controller 32, and the two terminals on the other side of the rotary connector are the output terminal 26 a of the roll screen 31, 26b. Here, the output terminals 26a and 26b of the roll screen 31 are terminals connected to the positive terminal and the negative terminal of the solar cell, respectively.

On the other hand, as shown in FIG. 3, when the roll screen device is installed, the input terminal 40 a and the input terminal 40 b are provided on the surface of the roll screen 31 on which the indoor organic electroluminescent device 23 is arranged. It is connected to the organic electroluminescent device 23 through wiring. As described above, these input terminals are connected to the output terminals 34 a and 34 b shown in FIG. 2, and the electric power generated in the solar cell 22 can be used for the organic electroluminescent device 23. The input terminals 40a and 40b may be connected to the output terminals 34a and 34b, respectively, using a converter, a signal conversion circuit, or the like as necessary. Further, the roll screen device according to the present invention may be wound so that the surface of the roll screen on which the solar cell is provided faces outward, or is provided with an organic electroluminescent device. Winding may be performed such that the surface of the roll screen faces outward. However, generally, in the case of a solar cell having a large element area, damage to the solar cell element affects the performance of the entire solar cell. Therefore, as shown in FIG. 5, it is preferable to perform the winding so that the surface of the roll screen 31 on which the solar cell 22 is provided faces outward. The stress is not applied, and the solar cell elements constituting the solar cell 22 are not easily destroyed.

  The above-described roll screen device 35 can be variously modified. For example, the solar cell 22 of the roll screen 31 is connected to the output terminal 26 a connected to the positive terminal of each solar cell 22 and the negative terminal of each solar cell 22 by arranging a plurality of solar cells 22 in a matrix. It can be transformed into a roll screen device provided with the output terminal 26b.

  In addition, the roll screen device 35 can be modified into one that does not include the charge / discharge controller 32 (one in which each solar cell 22 and the storage battery 33 are directly connected). When the roll screen device 35 is modified to such a configuration, a backflow prevention diode or the like may be provided between the positive electrode terminal of the solar cell and the output terminal 34a. Further, as described above, in FIG. 2, the rotary connector for connecting the output terminals 26 a and 26 b and the discharge controller 32 is provided inside the winding pipe 30, but in a range not departing from the spirit of the present invention, What is necessary is just to arrange | position a rotary connector in arbitrary places.

  Further, it is possible to take out the electric power from the solar cell 22 by using something other than the rotary connector (slip ring or the like), or to take out the electric power from the solar cell 22 without using the rotary connector or the like. Of course, it may be performed from the lower end side of the battery 22. For example, power may be taken out via a pull cord.

<2. Roll screen 31>
Hereinafter, the configuration of the roll screen according to the present invention will be described in detail. As shown in FIG. 1, the roll screen according to the present invention includes a base material 21, a solar cell 22, and an organic electroluminescent device 23.

<2-1. Substrate 21>
The base material 21 is a base material of the roll screen 31 and has a role of holding the solar cell 22 and the organic electroluminescent device 23, and the base material 21 has a resin layer 24 and a metal layer 25 described later.

<2-1-1. Resin layer 24>
The resin layer 24 has a role of insulating the solar cell 22 and the organic electroluminescent device 23. In the present invention, since the solar cell 22 and the organic electroluminescent device 23 are arranged symmetrically via the resin layer 24, any surface is distorted with respect to multiple times of bending and stretching. It becomes difficult to remain.

  Although there is no special restriction | limiting in the material which can be used for the resin layer 24, For example, polyester resin, acrylic resin, methacrylic resin, silicone resin, vinyl chloride resin, urethane resin, styrene resin, polyolefin type Examples thereof include resins, polyamide resins, and fluorine resins. The resin layer 24 may be a single layer or a laminated layer. In addition, the resin layer 24 may have a high light shielding property or may have a low light shielding property (so-called transparent feeling).

If the tensile strength of the resin layer 24 is too low, the external force at the time of winding is transmitted to the organic electroluminescent device 23 as distortion, and the organic electroluminescent device 23 is easily broken. On the other hand, if the tensile strength is too high, it is difficult to wind up the roll screen 31, and the residual stress in the state where the roll screen 31 is wound increases. Therefore, the tensile strength of the resin layer 24 is preferably 50 kg / cm ² or more, more preferably 100 kg / cm ² or more, further preferably 200 kg / cm ² or more, and 300 kg / cm ² or more. In particular, it is preferably 2000 kg / cm ² or less, more preferably 1500 kg / cm ² or less, further preferably 1300 kg / cm ² or less, and 800 kg / cm ² or less. It is particularly preferred.

  Moreover, when the film thickness of the resin layer 24 is too small, the heat generated from the solar cell 22 moves to the organic electroluminescent device 23 and is easily damaged. On the other hand, if the thickness of the resin layer 24 is too large, when the roll screen 31 is bent, the difference in strain between the inner side and the outer side becomes remarkably large, and a compressive stress is applied to the inner side and a tensile stress is applied to the outer side. In addition, the organic electroluminescent device 23 is easily damaged. Therefore, the thickness of the resin layer 24 is preferably 10 μm or more, more preferably 20 μm or more, further preferably 50 μm or more, particularly preferably 100 μm or more, and 500 μm or less. Is preferably 400 μm or less, more preferably 350 μm or less, and particularly preferably 300 μm or less.

<2-1-2. Metal layer 25>
Due to the characteristics of organic electroluminescent devices, the characteristics tend to deteriorate due to heat, and the lifetime tends to decrease. Therefore, it is desirable to suppress the heat stored in the solar cell 22 from being transmitted to the organic electroluminescent device 23 as much as possible. In the present invention, the base material 21 includes the metal layer 25. Specifically, in the roll screen device 35 shown in FIG. 5, most of the heat stored in the solar cell 22 is on the uppermost layer side (outside) of the solar cell 22 and on the organic electroluminescent device 23 side (indoor side). Try to move both. However, in the present invention, since the metal layer 25 is disposed between the organic electroluminescent device 23 and the solar cell 22, much of the heat that moves from the solar cell 22 to the organic electroluminescent device 23 side is organic. The metal layer 25 is reached before moving to the electroluminescent device 23. Since most of the heat reaching the metal layer 25 moves in the metal layer 25 having a high thermal conductivity (in the long axis direction of the substrate 21 in FIG. 1), a large amount of heat is generated at the upper end of the roll screen device 35. It moves to the (winding pipe side 30) and the lower end, and is finally radiated to the outside of the roll screen device 35. Therefore, by including the metal layer 25 in the base material 21, it is possible to suppress as much as possible the heat stored in the solar cell 22 from being transmitted to the organic electroluminescent device 23, and to deteriorate the characteristics of the organic electroluminescent device 23. It can prevent, and it can prevent that the lifetime of an organic electroluminescent apparatus falls.

There are no particular restrictions on the material used for the metal layer 25, but metals such as platinum, gold, silver, aluminum, chromium, nickel, copper, titanium, magnesium, calcium, barium, or sodium, or metal alloys thereof, In ₂ Examples thereof include conductive metal oxides such as O ₃ , SnO _{2, and} ITO. Among these, aluminum, gold, silver, copper, or alloys thereof are particularly preferable in order to improve heat dissipation. Among these, aluminum or copper, which has a relatively high thermal conductivity and is inexpensive, is preferable.

In order to enhance the heat dissipation effect, the thermal conductivity of the metal layer 25 is preferably 200 k (W / m · K) or more, more preferably 250 k (W / m · K) or more, and 300 k (W / m · K). The above is particularly preferable, and usually 1000 k (W / m · K) or less. Further, since the roll screen needs to be rollable, the Young's modulus of the metal layer 25 is preferably 150 GPa or less, more preferably 120 GPa or less, preferably 110 GPa or less, and usually 50 GPa or more. . The metal layer 25 may be a single layer or a stacked layer.

  1 illustrates the configuration in which the metal layer 25 is disposed between the resin layer 24 and the organic electroluminescent device 23, the position where the metal layer 25 is disposed is not limited to FIG. . For example, as shown in FIG. 6, the metal layer 25 may be disposed between the solar cell 22 and the resin layer 24. In addition, since the metal layer 25 tends to be weak against compressive stress, the roll screen device 35 is preferably disposed so as to be wound outside the resin layer 24. By arranging in this way, the metal layer 25 is not easily destroyed by compressive stress, and further, due to the influence, the solar cell 22 or the organic electroluminescent device 23 arranged inside the metal layer 25 is hardly mechanically destroyed. Because it becomes. Specifically, in a roll screen device that performs winding with the surface of the roll screen on which the solar cells 22 are disposed facing outside, the metal layer 25 may be disposed between the solar cells 22 and the resin layer 24. preferable. On the other hand, in a roll screen device that performs winding with the surface of the roll screen on which the organic electroluminescent device 23 is disposed facing outside, the metal layer 25 is disposed between the organic electroluminescent device 23 and the resin layer 24. It is preferable.

  A plurality of metal layers 25 may be provided via the resin layer 24. That is, the metal layer 25 may have a laminated structure. As shown in FIG. 7, the metal layer 25 includes a first metal layer 25a and a second metal layer 25b, and the first metal layer 25a is provided between the resin layer 24 and the solar cell 22, The second metal layer 25 b may be disposed between the resin layer 24 and the organic electroluminescent device 23. With such a configuration, even if the heat generated in the solar cell 22 partially moves to the resin layer 24 via the first metal layer 25a, the presence of the second metal layer 25b Since heat can be radiated to the outside of the roll screen device, heat transmitted to the organic electroluminescent device can be suppressed as much as possible.

  In addition, when the film thickness of the metal layer 25 is too large, it will become difficult to bend, and when too small, heat dissipation will fall. Therefore, the film thickness of the metal layer 25 is preferably 0.02 mm or more, more preferably 0.05 mm or more, particularly preferably 0.1 mm or more, and 0.8 mm or less. Preferably, it is 0.5 mm or less, more preferably 0.4 mm or less.

  In addition, there is no particular limitation on the ratio of the thickness of the resin layer 24 to the metal layer 25, but when the ratio of the thickness of the metal layer 25 to the thickness of the resin layer 24 is too large, when winding the roll screen, The solar cell 22 or the organic electroluminescent device 23 is easily destroyed. On the other hand, if the ratio of the thickness of the metal layer 25 to the thickness of the resin layer 24 is too small, excellent heat dissipation cannot be obtained. Therefore, the ratio of the thickness of the metal layer 25 to the thickness of the resin layer 24 is preferably ¼ or less, more preferably １ ／ or less, and even more preferably ６ or less, Especially preferably, it is 1/10 or less, On the other hand, Preferably it is 1/100 or more, More preferably, it is 1/80 or more, More preferably, it is 1/50 or more.

  In addition, when the metal layer 25 is a lamination | stacking, or when the metal layer 25 contains the 1st metal layer 25a and the 2nd metal layer 25b as shown in FIG. 7, the sum total of the film thickness is in the above-mentioned range. Preferably there is. In addition, there is no special restriction | limiting in the formation method of the metal layer 25, It can form by a well-known method. Specifically, it can be formed using a vacuum film formation method such as an evaporation method or a sputtering method.

<2-2. Solar Cell 22>
Hereinafter, the solar cell 22 according to the present invention will be described with reference to FIG. In addition, as shown in FIG. 8, the solar cell 22 is comprised including the solar cell element 6 at least.

<2-2-1. Solar Cell Element 6>
The solar cell element 6 may be a solar cell element having a certain degree of flexibility (not easily broken even when bending stress is repeatedly applied). Therefore, as the solar cell element 6, an amorphous silicon solar cell element, an organic solar cell element, a compound semiconductor solar cell element, or the like can be used.

  Moreover, when functioning as a roll screen, since only a limited end side is fixed and installed, an organic solar cell element that is resistant to impacts such as fluttering is preferable. The organic solar cell element can be colored, if necessary, and is preferable from the viewpoint of design. Here, the organic solar cell element is a solar cell element using an organic semiconductor for the light absorption layer (photoelectric conversion layer). Although the configuration is not particularly limited, for example, it has a layer structure in which an anode, a hole extraction layer, a photoelectric conversion layer (organic active layer), an electron extraction layer, and a cathode are sequentially formed.

  Any one of the anode and the cathode may be translucent, and both may be translucent. Translucency means that sunlight passes through 40% or more. The film thickness of the anode is not particularly limited, but is usually 10 nm or more and usually 10 μm or less. Examples of the material of the anode include conductive metal oxides such as indium-tin oxide (ITO) and indium-zinc oxide (IZO), metals such as silver, gold and aluminum, and metal thin films made of conductive metal oxide. Uses a three-layer transparent conductive film (IMI) sandwiched between transparent oxide thin films such as carbon materials such as carbon nanotubes and graphene, and conductive polymers doped with sulfonic acid and / or halogen, etc. Is done. The film thickness of the cathode is not particularly limited, but is usually 10 nm or more and usually 10 μm or less. As the material, for example, a metal similar to the anode such as a metal such as silver or aluminum can be used. In addition, a metal having a low work function such as calcium, barium or cesium is also preferably used. Two or more anodes or cathodes may be laminated, and characteristics (electric characteristics, wetting characteristics, etc.) may be improved by surface treatment.

  The organic active layer usually contains a p-type semiconductor compound and an n-type semiconductor compound. Examples of the layer structure of the organic active layer include a thin film stack type, a bulk heterojunction type, and a PIN type. Among these, a bulk heterojunction type in which a p-type semiconductor compound and an n-type semiconductor compound are mixed is preferable. The film thickness is not particularly limited, but is usually 10 nm or more and usually 10 μm or less. The method for forming the organic active layer is not particularly limited, but a coating method such as spin coating, die coating, gravure coating, dip coating, and ink jet is preferable.

  A p-type semiconductor compound is a material that operates as a p-type semiconductor whose film can transport holes, but a π-conjugated high molecular compound, a π-conjugated low-molecular organic compound, or the like is preferably used. A mixture of these compounds may also be used. The conjugated polymer compound is obtained by polymerizing a single or a plurality of π-conjugated monomers, and examples of the monomer include thiophene, fluorene, carbazole, diphenylthiophene, dithienothiophene, dithienosilole, dithieno which may have a substituent. Examples include cyclohexane, benzothiadiazole, thienothiophene, imidothiophene, benzodithiophene, and the molecular weight is preferably 10,000 or more. These monomers may be directly bonded, or may be bonded via an ethylenylene group (—CH═CH—), an acetylenylene group (—C≡C—), a nitrogen atom and / or an oxygen atom. Since the π-conjugated polymer material has durability against bending stress, it is preferable in terms of impact resistance and durability against opening and closing of the roll screen.

  Low molecular organic semiconductor materials include condensed aromatic hydrocarbons such as pentacene and naphthacene, oligothiophenes bonded with four or more thiophene rings, porphyrin compounds such as porphyrin compounds and tetrabenzoporphyrin compounds and metal complexes thereof, and phthalocyanine compounds And metal complexes thereof. The HOMO level of a p-type semiconductor is usually −5, 7 eV or more, and usually −4.6 eV or less.

  The n-type semiconductor compound is not particularly limited, and examples thereof include fullerene compounds and derivatives thereof, and condensed ring tetracarboxylic acid diimides. Examples of fullerenes include C60 or C70, and those obtained by adding a substituent to two carbons of the fullerene, those having a substituent added to four carbons, and further adding a substituent to six carbons. Things. In order for the fullerene compound to be applicable to a coating method, the fullerene compound is preferably highly soluble in some solvent and can be applied as a solution. The LUMO level of an n-type semiconductor is usually −4.5 eV or more and usually −2.0 eV or less.

  The thickness of the hole extraction layer is not particularly limited, but is usually 2 nm or more and 500 nm or less. As the material, a conductive polymer in which polythiophene, polypyrrole, or polyaniline is doped with sulfonic acid and / or halogen, or a metal oxide having a high work function such as molybdenum oxide or nickel oxide is used.

  The thickness of the electron extraction layer is not particularly limited, but is usually from 0.1 nm to 500 nm. The material is not particularly limited, and specific examples include inorganic compounds and organic compounds. Examples of the inorganic compound include alkali metal salts such as LiF, and n-type oxide semiconductors such as titanium oxide (TiOx) and zinc oxide (ZnO). Organic compounds include phenanthrene derivatives such as bathocuproin (BCP) and bathophenanthrene (Bphen), and phosphine compounds having a double bond between a phosphorus atom and an oxygen atom or a double bond between a phosphorus atom and a sulfur atom in the molecule. And a phosphine compound having an aromatic hydrocarbon group or an aromatic heterocyclic group on the phosphorus atom, and among them, a phosphine compound having an aromatic hydrocarbon group or an aromatic heterocyclic group on the phosphorus atom is preferable. In addition, each structural member used for a solar cell element is not necessarily limited to said material, For example, the material described in international publication 2011/016430 or Unexamined-Japanese-Patent No. 2012-191194 etc. is used. be able to. Each constituent member can be formed by a known forming method, and specific examples include the methods described in the above-mentioned known documents.

  On the other hand, an amorphous silicon solar cell element has an advantage that it can sufficiently absorb sunlight even with a thin film having a thickness of about 1 μm. Amorphous silicon is an amorphous material with high resistance to bending. Therefore, if the solar cell unit 11 is composed of several amorphous silicon solar cell elements, the solar cell element is less likely to be damaged / deteriorated in performance due to winding on the winding pipe 30, and thin. And lightweight solar cell module 10 can be realized.

  An amorphous silicon solar cell element is a solar cell element using amorphous silicon for the photoelectric conversion layer. Although a structure is not specifically limited, For example, it has the layer structure and board | substrate with which the photoelectric converting layer was formed between electrodes. The same substrate as the organic solar cell element can be used. The same electrode as the anode and cathode of the organic solar cell can be used as the electrode. The photoelectric conversion layer preferably has a PIN structure.

  A compound semiconductor solar cell element can also be used as the solar cell element. The compound semiconductor solar cell element is a solar cell element using a compound semiconductor for the photoelectric conversion layer. Although a structure is not specifically limited, For example, it has the layer structure and board | substrate with which the photoelectric converting layer was formed between electrodes. The same substrate and electrode as those of the amorphous silicon solar cell element can be used.

The photoelectric conversion layer is preferably an I-III-VI group ₂ semiconductor (chalcopyrite type) that provides high photoelectric conversion efficiency, and particularly preferably a Cu-III-VI group ₂ semiconductor using Cu as the group I element. The Cu-III-VI group ₂ semiconductor is a semiconductor made of a compound containing Cu, a group III element, and a group VI element in a ratio of 1: 1: 2. As this Cu-III-VI ₂ group semiconductor, C
_{uInSe 2, CuGaSe 2, Cu (} In 1-x Ga x) Se 2, CuInS 2, CuGaS 2
_{, Cu (In 1-x Ga} x) S 2, CuInTe 2, CuGaTe 2, Cu (In 1-x Ga x) T
e ₂ can be exemplified. Moreover, the mixture of these 2 or more types may be sufficient. Especially, CI
S-based semiconductors and CIGS-based semiconductors are preferred.

The CIS-based semiconductor is CuIn (Se _1-y S _y ) ₂ [0 ≦ y ≦ 1]. That is, the CIS-based semiconductor is CuInSe ₂ , CuInS ₂ , or those in a mixed state. In addition, it is preferable to use S instead of Se because safety is improved.
The CIGS-based semiconductor is Cu (In _1-x Ga _x ) (Se _1-y S _y ) ₂ [0 <x <1, 0 ≦ y
≦ 1]. Note that Cu (In _1-x Ga _x ) Se ₂ is usually a mixed crystal of CuInSe ₂ and CuGaSe ₂ . Also, the range of x is usually greater than 0, preferably greater than 0.05, more preferably greater than 0.1, and usually less than 0.8, preferably less than 0.5, more preferably 0. Less than 4.

  In addition to the solar cell element 6, the solar cell 22 according to the present invention includes a weather-resistant protective film 1, a sealing material 5, 7, a back sheet 10, an ultraviolet cut film 2, a gas barrier film 3, as shown in FIG. 9, You may have getter material film 4,8 grade. These constituent members are arbitrary and can be appropriately selected and used.

  It is preferable that the outermost layer on the light receiving surface side of the solar cell 22 has an uneven shape. Specifically, the maximum height Rz of the unevenness is 1 μm or more and 220 μm or less, and the average interval Sm of the unevenness is 0.1 mm or more and 10 mm or less. By forming the irregularities in this way, it is possible to reduce the stress load applied to the solar cell element when the roll screen is wound. In addition, assuming the use conditions, when the solar cell is exposed for a long time under freezing condensation, local stress is less likely to occur in the solar cell element due to the same effects as described above, and the electrode portion is less likely to be damaged. . If damage to the electrode portion of the solar cell element is difficult to occur, the output of the solar cell is difficult to decrease. The maximum unevenness height Rz and the average unevenness interval Sm are measured with a surface roughness shape measuring instrument (for example, Surfcom 5,70A manufactured by Tokyo Seimitsu Co., Ltd.) according to JIS B0601. Value.

  Moreover, the average interval (Sm1) of the unevenness in the short axis direction of the unit solar cell element is the average interval of the unevenness in the short axis direction of the unit solar cell element among the unevenness of the light receiving surface of the solar cell. In addition, the average interval (Sm2) of the irregularities in the major axis direction of the unit solar cell element is the average interval of irregularities in the major axis direction of the unit solar cell element among the irregularities of the light receiving surface of the solar cell.

The maximum height Rz of the irregularities is preferably 1 μm or more and 220 μm or less, preferably 5 μm or more and 200 μm or less, in order to make it difficult for the electrode part of the solar cell element to be damaged and to prevent wrinkles. More preferably, it is 10 μm or more and 180 μm or less.
In order to prevent wrinkles from forming on the entire roll screen and to prevent breakage of the electrode part and generation of bubbles due to large distortion at the uneven part, the average interval Sm between the uneven parts is preferably 0.1 mm or more and 10 mm or less. More preferably, it is 0.15 mm or more and 9 mm or less, and more preferably 0.2 mm or more and 8 mm or less. Further, the ratio (Sm2 / Sm1) of the average interval (Sm1) of the irregularities in the minor axis direction of the unit solar cell element to the average interval (Sm2) of the irregularities in the major axis direction is preferably 1.2 or more. .5 or more is more preferable.

As a method for forming such unevenness, the unevenness may be formed during hot pressing (laminating), or the unevenness may be transferred after the solar cell is manufactured. From the viewpoint of forming irregularities with good productivity, it is preferable to form irregularities during hot pressing. In addition, as a member for forming the unevenness, a member for transferring the unevenness may be used, or a laminate in which such unevenness is formed in advance may be used. Any member can be used as a member for transferring irregularities as long as the shape for transferring the desired irregularities is formed. A sheet-shaped member and a mold having a structure for forming irregularities on the surface are formed. It is preferable to use a film in which a structure for forming irregularities is formed. In particular, from the viewpoint of efficiently transferring irregularities, it is preferable to use a sheet-like member or a mold having a structure for forming irregularities on the surface. In addition, as above-mentioned, an outermost layer means the layer (component) arrange | positioned in the light-receiving surface of a solar cell, ie, the outermost surface by the side of a light-receiving surface, in the component included in a solar cell. Hereinafter, although the structural member which the solar cell may have is demonstrated, generally the weather-resistant protective film 1 is used as an outermost layer of a solar cell. Therefore, although there is no special limitation, it is preferable that especially the weather-resistant protective film 1 has an uneven shape.

<2-2-2. Weatherproof protective film 1>
The weather resistant protective film 1 is a film for protecting the solar cell element 6 from weather changes. Since the weather-resistant protective film 1 is generally located on the outermost layer of the solar cell 22, it is used as a surface covering material for solar cells such as weather resistance, heat resistance, transparency, water repellency, contamination resistance, and mechanical strength. It is preferable to have a suitable performance and to maintain it for a long period of time even in outdoor exposure.
Since it is preferable that the solar cell 22 can be wound compactly, the weather-resistant protective film 1 is preferably thin. Usually, it is 10 μm or more, preferably 15 μm or more, more preferably 20 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less, and further preferably 100 μm or less. When the weather-resistant protective film 1 is thinned, the flexibility is increased, so that winding becomes easy. However, if the weather-resistant protective film 1 is too thin, the weather resistance cannot be ensured. Moreover, the weather-resistant protective film 12 is preferably one that transmits visible light from the viewpoint of not preventing the solar cell element 6 from absorbing light. For example, the visible light (wavelength 360 to 830 nm) light transmittance of the weather-resistant protective film 1 is preferably 80% or more, more preferably 90% or more, and particularly preferably 95%.

  Furthermore, since the solar cell 22 is often heated by receiving light, it is preferable that the weather-resistant protective film 1 also has heat resistance. From this viewpoint, the melting point of the constituent material of the weather-resistant protective film 1 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower. Preferably it is 300 degrees C or less. By increasing the melting point, it is possible to reduce the possibility that the weather-resistant protective film 1 is melted and deteriorated when the solar cell 22 is used.

  The material which comprises the weather-resistant protective film 1 is arbitrary as long as it can protect the solar cell element 6 from a weather change. Examples of the material include polyethylene resin, polypropylene resin, cyclic polyolefin resin, AS (acrylonitrile-styrene) resin, ABS (acrylonitrile-butadiene-styrene) resin, polyvinyl chloride resin, fluorine resin, polyethylene terephthalate, polyethylene Examples thereof include polyester resins such as naphthalate, phenol resins, polyacrylic resins, polyamide resins such as various nylons, polyimide resins, polyamide-imide resins, polyurethane resins, cellulose resins, silicone resins, and polycarbonate resins.

  Among them, fluorine resin is preferable, and specific examples thereof include polytetrafluoroethylene (PTFE), 4-fluoroethylene-perchloroalkoxy copolymer (PFA), 4-fluoroethylene-6-fluoride. Propylene copolymer (FEP), 2-ethylene-4-fluoroethylene copolymer (ETFE), poly-3-fluoroethylene chloride (PCTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), etc. Can be mentioned.

  In addition, the weather-resistant layer has functions such as ultraviolet blocking, heat blocking, antifouling, antifogging, abrasion resistance, conductivity, antireflection, antiglare, light diffusion, light scattering, wavelength conversion, gas barrier properties, etc. It may be given. In particular, since the solar cell 22 is exposed to strong ultraviolet rays from sunlight, the weather resistant layer may have an ultraviolet blocking function. The UV blocking function can be achieved by laminating a layer having an UV blocking function on the weather resistant layer by coating film formation, etc., or by dissolving and dispersing a material that exhibits the UV blocking function. Can be applied to the weathering layer.

  In addition, the weather-resistant protective film 1 may be formed with 1 type of material, and may be formed with 2 or more types of materials. Moreover, although the weather-resistant protective film 1 may be formed with the single layer film, the laminated | multilayer film provided with the film of 2 or more layers may be sufficient as it. Moreover, you may perform surface treatment, such as a corona treatment and a plasma treatment, for the weather-resistant protective film 1 in order to improve adhesiveness with another film.

  It is preferable to provide the weatherproof protective film 1 on the outer side of the solar cell 22 as much as possible. This is because more of the constituent members of the solar cell 22 can be protected. Therefore, it is preferable to provide the weather-resistant protective film 1 on the outermost surface of the solar cell 22. Improved output when the inclination angle of the solar cell 22 surface is 10 ° or more with respect to the direction of gravity by using the weather-resistant protective film 1 as a fluororesin and the weather-resistant protective film 1 as the outermost surface of the solar cell. Becomes prominent. On the other hand, since the general-purpose resin has a higher refractive index than the fluororesin, the effect of the tilt angle on the output is reduced. Therefore, when a general-purpose resin is used for the outermost surface of the solar cell 22 as the weather-resistant protective film 1, it is necessary to increase the inclination angle in order to obtain the same output as that of the fluorine-based resin, and the screen installation space increases.

<2-2-3. Sealing materials 5, 7>
The sealing material 5 is a film that reinforces the solar cell element 6. Since the solar cell element 6 is thin, the strength is usually weak, and thus the strength of the solar cell 22 tends to be weak. However, the strength can be maintained high by the sealing material 5. In order to allow the solar cell 22 to be wound compactly, the sealing material 5 is preferably thin. Usually, it is 50 μm or more, preferably 100 μm or more, more preferably 150 μm or more, and usually 500 μm or less, preferably 450 μm or less, more preferably 400 μm or less. Thinning increases flexibility and makes winding easier. However, if it is too thin, strength is not ensured, which is not preferable.

  Moreover, it is preferable that the sealing material 5 has high strength from the viewpoint of maintaining the strength of the solar cell 22. The specific strength is related to the strength of the weatherproof protective film 1 other than the sealing material 5 and the strength of the back sheet 10 and is generally difficult to define, but the sealing material 5 It is desirable to have adhesiveness and strength that does not cause peeling or deformation in each part of the solar cell 22 even if the pipe 30 is wound or stretched.

  In addition, the sealing material 5 is preferably one that transmits visible light from the viewpoint of not preventing the solar cell element 6 from absorbing light. For example, the transmittance of visible light (wavelength 360 to 830 nm) of the sealing material 5 is usually 60% or more, preferably 70% or more, more preferably 75% or more, still more preferably 80% or more, and most preferably. It is 85% or more, particularly preferably 90% or more, particularly preferably 95% or more, and particularly preferably 97% or more. This is to convert more sunlight into electrical energy.

Furthermore, since the solar cell 22 is often heated by receiving light, it is preferable that the sealing material 5 also has heat resistance. From this viewpoint, the melting point of the constituent material of the sealing material 5 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower, more preferably. Is 300 ° C. or lower. By increasing the melting point, it is possible to reduce the possibility that the sealing material 5 is melted and deteriorated when the roll screen system (main device 100) is used.

  Examples of the material constituting the sealing material 5 include an ethylene-vinyl acetate copolymer (EVA), an acrylic resin, an ethylene-ethyl acrylate copolymer (EEA), and an ethylene-methyl acrylate copolymer. (EMA) and other acrylic resin copolymers, ethylene-methyl methacrylate copolymers (EMMA), ethylene-methacrylic acid copolymers (EMAA), propylene / ethylene / α-olefin copolymers, ethylene / α-olefins Examples thereof include a copolymer, a urethane resin, a butyral resin, an ionomer resin, and a silicone resin. Moreover, the fluoropolymer which has tetrafluoroethylene (TFE), hexafluoropropylene (HFP), vinylidene fluoride (VdF) or tetrafluoroethylene (TFE), vinylidene fluoride (VdF) as a main component is also mentioned. Among these, olefin-based resins are inexpensive materials that have a low possibility of generating toxic gas even when heated by mistake. Therefore, the olefin resin is suitable as the sealing material 5 of the roll screen system (main body device) used indoors. From the viewpoint of reducing damage to the solar cell element due to bending stress generated by opening and closing the roll screen, a crosslinkable sealing material is preferable. On the other hand, from the viewpoint of easy opening and closing of the roll screen, a non-crosslinkable sealing material is preferable in order to maintain flexibility.

Moreover, the sealing material 7 is a film similar to the sealing material 5 described above, and the same material as the sealing material 5 can be used in the same manner except for the disposition position. The thickness is the same as that of the sealing material 5. Moreover, since the constituent member on the back side of the solar cell element 6 does not necessarily need to transmit visible light, the sealing material 7 that does not transmit visible light can also be used.
<2-2-4. Back sheet 10>

  The back sheet 10 is preferably thin so that the solar cell 22 can be compactly wound. It is usually 10 μm or more, preferably 15 μm or more, more preferably 20 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less. Thinning tends to increase flexibility and facilitates winding, but too thin is not preferable because weather resistance is not ensured.

  The back sheet 10 is the same film as the weather-resistant protective film 1 described above, and the same material as the weather-resistant protective film 1 can be used in the same manner except that the arrangement position is different. Moreover, since the constituent member on the back side of the solar cell element 6 does not necessarily need to transmit visible light, a member that does not transmit visible light can be used. For this reason, as the backsheet 10, what is demonstrated below can also be used.

  For example, polyethylene resin, polypropylene resin, cyclic polyolefin resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyvinyl chloride resin, fluorine Resins, poly (meth) acrylic resins, polycarbonate resins, polyester resins such as polyethylene terephthalate or polyethylene naphthalate, polyamide resins such as various nylons, polyimide resins, polyamideimide resins, polyarylphthalate resins Sheet of various resins such as silicone resin, polysulfone resin, polyphenylene sulfide resin, polyethersulfone resin, polyurethane resin, acetal resin, cellulose resin, etc. It is possible to use.

Among these resin sheets, it is preferable to use a fluorine resin, a cyclic polyolefin resin, a polycarbonate resin, a poly (meth) acrylic resin, a polyamide resin, or a polyester resin sheet. Specific examples of the fluorine resin include polytetrafluoroethylene (PTFE), 4-fluorinated ethylene-perchloroalkoxy copolymer (PFA), 4-fluorinated ethylene-6-fluorinated propylene copolymer (FEP). , 2-ethylene-4-fluoroethylene copolymer (ETFE), poly-3-fluoroethylene chloride (PCTFE), polyvinylidene fluoride (PVDF), and polyvinyl fluoride (PVF). In addition, these may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

<2-2-5. UV cut film 2>
The ultraviolet cut film 2 is a film that prevents the transmission of ultraviolet rays. Since some components of the solar cell 22 are deteriorated by ultraviolet rays, the ultraviolet cut film 2 may be used. For example, some gas barrier films 3, 9 and the like which will be described later may be deteriorated by ultraviolet rays depending on the type. Therefore, by using the ultraviolet cut film 2, it is possible to protect the gas barrier films 3, 9 and the like from ultraviolet rays and maintain their functions high. it can.

  The ultraviolet cut film 2 is usually 5 μm or more, preferably 10 μm or more, more preferably 15 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less. Increasing the thickness tends to increase the absorption of ultraviolet rays, but if it is too thick, the compactness cannot be secured, so the above range is preferable.

  The degree of the ability to suppress the transmission of ultraviolet rays required for the ultraviolet cut film 2 is such that the transmittance of ultraviolet rays (for example, wavelength 300 nm) is preferably 50% or less, more preferably 30% or less, and particularly preferably. 10% or less. Further, the ultraviolet cut film 2 is preferably one that transmits visible light from the viewpoint of not preventing the solar cell element 6 from absorbing light. For example, the transmittance of visible light (wavelength 360 to 830 nm) is preferably 80% or more, more preferably 90% or more, and particularly preferably 95%.

  Furthermore, since the solar cell 22 is often heated by receiving light, the ultraviolet cut film 2 preferably has resistance to heat. From this viewpoint, the melting point of the constituent material of the ultraviolet cut film 2 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower, more preferably. Is 300 ° C. or lower. If the melting point is too low, the ultraviolet cut film 2 may melt when the solar cell 22 is used.

  Moreover, the ultraviolet cut film 2 has a high softness | flexibility, its adhesiveness with an adjacent film is favorable, and what can cut water vapor | steam and oxygen is preferable. The material which comprises the ultraviolet cut film 2 is arbitrary if the intensity | strength of an ultraviolet-ray can be weakened. Examples of the material include films formed by blending an ultraviolet absorber with an epoxy, acrylic, urethane, or ester resin.

  As the ultraviolet absorber, for example, a salicylic acid-based, benzophenone-based, benzotriazole-based, or cyanoacrylate-based one can be used. Of these, benzophenone and benzotriazole are preferable. Examples of this include various aromatic organic compounds such as benzophenone and benzotriazole. The ultraviolet absorber may be formed of one kind of compound or may be formed of two or more kinds of compounds.

Moreover, you may use the film which formed the layer which disperse | distributed or melt | dissolved the ultraviolet absorber in resin on the base film. Or the film which formed the ultraviolet absorption layer on the base film can also be used. Such a film can be produced, for example, by applying a coating solution containing an ultraviolet absorber on a substrate film and drying it. Although the material of a base film is not specifically limited, For example, polyester is mentioned at the point from which the balance of heat resistance and a softness | flexibility is obtained.

  Application | coating can be performed by arbitrary methods. Examples include reverse roll coating, gravure coating, kiss coating, roll brushing, spray coating, air knife coating, wire barber coating, pipe doctor method, impregnation / coating method, curtain coating method and the like. In addition, these methods may be performed alone or in any combination of two or more. The ultraviolet cut film 2 may be formed of a single layer film, but may be a laminated film composed of two or more layers.

<2-2-6. Gas barrier film 3, 9>
The gas barrier film 3 is a film that prevents permeation of water and oxygen.
The solar cell element 6 tends to be vulnerable to moisture and oxygen. In particular, transparent electrodes such as ZnO: Al, compound semiconductor solar cell elements, and organic solar cell elements may be deteriorated by moisture and oxygen. Therefore, it is preferable to protect the solar cell element 6 from water and oxygen by covering the solar cell element 6 with the gas barrier films 3 and 9.

  Since it is better for the solar cell 22 to be wound compactly, the gas barrier films 3 and 9 are preferably thin. It is usually 10 μm or more, preferably 15 μm or more, more preferably 20 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less. Thinning tends to increase flexibility and facilitates winding, but too thin is not preferable because the barrier property is not ensured.

The degree of moisture resistance required for the gas barrier films 3 and 9 varies depending on the type of the solar cell element 6 and the like. For example, when the solar cell element 6 is a compound semiconductor solar cell element, the water vapor permeability per unit area (1 m ² ) per day is 1 × 10 ⁻¹ g / m ² / day or less. Is preferably 1 × 10 ⁻² g / m ² / day or less,
It is more preferably 1 × 10 ⁻³ g / m ² / day or less, particularly preferably 1 × 10 ⁻⁴ g / m ² / day or less, and 1 × 10 ⁻⁵ g / m ² / day or less. It is particularly preferable that it is 1 × 10 ⁻⁶ g / m ² / day or less. When the solar cell element is an organic solar cell element, the water vapor permeability per unit area (1 m ² ) per day is preferably 1 × 10 ⁻¹ g / m ² / day or less, It is more preferably 1 × 10 ⁻² g / m ² / day or less, further preferably 1 × 10 ⁻³ g / m ² / day or less, and further preferably 1 × 10 ⁻⁴ g / m ² / day or less. It is particularly preferable that 1 × 10 ⁻⁵ g
/ M ² / day or less is particularly preferable, and 1 × 10 ⁻⁶ g / m ² / day or less is particularly preferable. As the water vapor does not pass, deterioration due to the reaction between the solar cell unit 11 and the transparent electrode such as ZnO: Al is suppressed, so that the power generation efficiency is increased and the life is extended.

The degree of oxygen permeability required for the gas barrier films 3 and 9 varies depending on the type of the solar cell element 6 and the like. For example, when the solar cell element 6 (unit element) is a compound semiconductor solar cell element, the oxygen transmission rate per unit area (1 m ² ) per day is 1 × 10 ^−1.
is preferably less ^{cc / m 2 / day / atm} , 1 × 10 -2 , more preferably cc / m is ² / day / atm or ^{less, 1 × 10 -3 cc / m} 2 / day / atm or less Is more preferably 1 × 10 ⁻⁴ cc / m ² / day / atm or less, particularly preferably 1 × 10 ⁻⁵ cc / m ² / day / atm or less,
It is particularly preferably 1 × 10 ⁻⁶ cc / m ² / day / atm or less. For example,
When the solar cell unit 11 is an organic solar cell element, the oxygen permeability per unit area (1 m ² ) per day is preferably 1 × 10 ⁻¹ cc / m ² / day / atm or less. 1 × 10 ⁻² cc / m ² / day / atm or less is more preferable, and 1 × 10 ⁻³ c
It is more preferably c / m ² / day / atm or less, particularly preferably 1 × 10 ⁻⁴ cc / m ² / day / atm or less, and more preferably 1 × 10 ⁻⁵ cc / m ² / day / atm. It is particularly preferable that it is 1 × 10 ⁻⁶ cc / m ² / day / atm or less. The deterioration of the solar cell unit 11 and the transparent electrode such as ZnO: Al due to oxidation is suppressed as the oxygen does not permeate.

  Moreover, the gas barrier films 3 and 9 are preferably those that transmit visible light from the viewpoint of not preventing the solar cell element 6 from absorbing light. For example, the transmittance of visible light (wavelength 360 to 830 nm) is usually 60% or more, preferably 70% or more, more preferably 75% or more, still more preferably 80% or more, and particularly preferably 85% or more. Preferably it is 90% or more, Especially preferably, it is 95% or more, Especially preferably, it is 97% or more. This is to convert more sunlight into electrical energy.

  Furthermore, since the solar cell 22 is often heated by receiving light, the gas barrier films 3 and 9 preferably have heat resistance. From this viewpoint, the melting point of the constituent material of the gas barrier films 3 and 9 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower, more Preferably it is 300 degrees C or less. By increasing the melting point, it is possible to reduce the possibility that the gas barrier films 3 and 9 are melted and deteriorated when the solar cell 22 is used.

  The specific structure of the gas barrier films 3 and 9 is arbitrary as long as the solar cell element 6 can be protected from water. However, since the manufacturing cost increases as the amount of water vapor or oxygen that can permeate the gas barrier films 3 and 9 increases, it is preferable to use an appropriate film considering these points comprehensively.

As suitable gas barrier films 3 and 9, for example, a film obtained by vacuum-depositing SiO _x (value of x is 1.5 to 1.8) on a base film such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). Etc. AlO _y (y value is 1.0 to 1.4) may be used instead of SiO _x , and these two kinds of materials may be used. The gas barrier films 3 and 9 may be formed of a single layer film, but may be a laminated film including two or more layers.

<2-2-7. Getter film 4,8>
The getter material films 4 and 8 are films that absorb moisture and / or oxygen. Some components of the solar cell element 6 are deteriorated by moisture as described above, and some are deteriorated by oxygen. Therefore, it is preferable to cover the solar cell element 6 with the getter material films 4 and 8 to protect the solar cell element 6 and the like from moisture and / or oxygen so that the power generation capacity does not decrease.

  Here, unlike the gas barrier films 3 and 9, the getter material films 4 and 8 do not prevent moisture permeation but absorb moisture. By using a film that absorbs moisture, when the solar cell element 6 is covered with the gas barrier films 3, 9, the getter material films 4, 8 absorb moisture that slightly enters the space inside the gas barrier films 3, 9. It is possible to eliminate the influence of moisture on the solar cell element 6 due to moisture.

The degree of water absorption ability of the getter material films 4 and 8 is usually 0.1 mg / cm ² or more, preferably 0.5 mg / cm ² or more, more preferably 1 mg / cm ² or more. The higher this value, the higher the water absorption capacity, and the deterioration of the solar cell element 6 can be suppressed. Moreover, although there is no restriction | limiting in an upper limit, it is usually 10 mg / cm < ² > or less.

  Further, when the solar cell element 6 is covered with the gas barrier films 3 and 9 or the like by the getter material films 4 and 8 absorbing oxygen, the oxygen that slightly enters the space inside the gas barrier films 3 and 9 is gettered. The material films 4 and 8 can capture and eliminate the influence of oxygen on the solar cell element 6.

  The thickness of the getter material films 4 and 8 is not particularly defined, but is usually 5 μm or more, preferably 10 μm or more, more preferably 15 μm or more, and usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less. Increasing the thickness tends to increase mechanical strength, and decreasing the thickness tends to increase flexibility.

  Furthermore, it is preferable that the getter material films 4 and 8 transmit visible light from the viewpoint of not preventing the solar cell element 6 from absorbing light. For example, the transmittance of visible light (wavelength 360 to 830 nm) is usually 60% or more, preferably 70% or more, more preferably 75% or more, still more preferably 80% or more, and particularly preferably 85% or more. Preferably it is 90% or more, Especially preferably, it is 95% or more, Especially preferably, it is 97% or more. This is to convert more sunlight into electrical energy.

  Furthermore, since the solar cell 22 is often heated by receiving light, the getter material films 4 and 8 preferably have heat resistance. From this viewpoint, the melting point of the constituent material of the getter material films 4 and 8 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower. More preferably, it is 300 degrees C or less. By increasing the melting point, the possibility that the getter material films 4 and 8 are melted and deteriorated when the solar cell 22 is used can be reduced.

  The material constituting the getter material films 4 and 8 is arbitrary as long as it can absorb moisture and / or oxygen. Examples of the material include alkali metal, alkaline earth metal, alkaline earth metal oxide, alkali metal or alkaline earth metal hydroxide, silica gel, zeolite compound, magnesium sulfate as a substance that absorbs moisture. And sulfates such as sodium sulfate and nickel sulfate, and organometallic compounds such as aluminum metal complexes and aluminum oxide octylates. Specifically, examples of the alkaline earth metal include Ca, Sr, and Ba. Examples of the alkaline earth metal oxide include CaO, SrO, and BaO. In addition, Zr-Al-BaO, an aluminum metal complex, etc. are also mentioned. Specific product names include, for example, OleDry (Futaba Electronics).

  Examples of the substance that absorbs oxygen include activated carbon, silica gel, activated alumina, molecular sieve, magnesium oxide, and iron oxide. In addition, Fe, Mn, Zn, and inorganic salts such as sulfates, chlorides, and nitrates of these metals are also included.

  In addition, the getter material films 4 and 8 may be formed of one kind of material or may be formed of two or more kinds of materials. The getter material films 4 and 8 may be formed of a single layer film, but may be a laminated film including two or more layers.

  The getter material films 4 and 8 can be formed by any method depending on the type of the water-absorbing agent or desiccant. For example, a method of attaching a film in which the water-absorbing agent or desiccant is dispersed with an adhesive, water-absorbing agent or A method of applying a desiccant solution by a spin coating method, an ink jet method, a dispenser method, or the like can be used. A film forming method such as a vacuum evaporation method or a sputtering method may be used.

As a film for a water absorbing agent or a desiccant, for example, polyethylene resin, polypropylene resin, cyclic polyolefin resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyvinyl chloride resin, fluorine resin, poly (meth) acrylic resin, polycarbonate resin, and the like can be used. Among these, films of polyethylene resin, fluorine resin, cyclic polyolefin resin, and polycarbonate resin are preferable. In addition, the said resin may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

  The solar cell 22 according to the present invention is frequently wound or stretched. Moreover, the solar cell 22 is easily heated due to sunlight from the window. Under such conditions of use, the films such as the sealing materials 5 and 7 are likely to be creeped, distorted or warped. In particular, since such deformation or the like is likely to occur in the edge portion of the solar cell 22, a reinforcing material may be provided in the solar cell 22.

  Examples of the reinforcing material include nonwoven fabrics or woven fabrics made of inorganic fibers such as glass and titanium, nonwoven fabrics or woven fabrics made of organic fibers such as polyamide, polyamideimide, polyimide, liquid crystalline polymer, and aromatic amide, and blends thereof. Nonwoven fabric or woven fabric made of Among these, a glass fiber nonwoven fabric is preferably used. Further, when this nonwoven fabric is used so as to be in contact with the sealing materials 5 and 7, even if the surface of the glass fiber is treated with a silane coupling agent in order to improve the adhesion between the sealing material resin and the glass fiber interface. good.

  Specific examples of the silane coupling agent include vinyltrichlorosilane, vinyltriethoxysilane, vinyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, and γ-aminopropyltriethoxy. Examples include silane and γ-chloropropyltrimethoxysilane. Treatment methods include a spray method in which an alcohol solution or an aqueous solution of a silane coupling agent is sprayed on the nonwoven fabric, a dipping method in which the nonwoven fabric is immersed in the solution, and a gravure coating method in which the nonwoven fabric is passed between rolls wet with the solution.

  As the shape of the reinforcing material, a shape that covers the entire group of solar cell elements 6 like the sealing materials 5 and 7 or a shape that reinforces only the edge portion of the solar cell 22 can be adopted. In order to make the solar cell 22 nonflammable or flame retardant, a filler such as a glass nonwoven fabric or silica can be added to the solar cell 22 other than the solar cell element 6. Next, each structure of the organic electroluminescence device will be described.

<2-3. Organic Electroluminescent Device 23>
As shown in FIG. 9, the organic electroluminescent device 23 that can be used in the roll screen of the present invention has at least an organic electroluminescent element 51. In addition, as an organic electroluminescent apparatus, although it is not necessarily limited, the illuminating device and display apparatus which used the organic electroluminescent element are mentioned.

<2-3-1. Organic Electroluminescent Device 51>
The organic electroluminescent element 51 has at least an anode, a light emitting layer, and a cathode. The organic electroluminescent device 51 emits light when excitons generated by recombination of holes and electrons are lowered from an excited state to a ground state by holes and electrons injected into the light emitting layer by an anode and a cathode, respectively. . And it can use as an illuminating device or a display apparatus using this light emission principle.

In order to inject holes efficiently, the anode preferably uses a material having a large work function from the vacuum level of the electrode material. Usually, metals such as aluminum, gold, silver, nickel, palladium, platinum, indium and / Or metal oxides such as oxides of tin, metal halides such as copper iodide, carbon black, or poly (3-methylthiophene), polypyrrole,
It is composed of a conductive polymer such as polyaniline.

  The anode can be usually formed by a sputtering method, a vacuum deposition method or the like. In addition, when forming an anode using fine metal particles such as silver, fine particles such as copper iodide, carbon black, conductive metal oxide fine particles, and conductive polymer fine powder, an appropriate binder resin solution is used. The anode can also be formed by dispersing and coating. The anode may have a single layer structure, or may have a laminated structure made of a plurality of materials as desired.

  In addition, the surface of the anode 2 is subjected to ultraviolet (UV) / ozone treatment, oxygen plasma or argon plasma treatment for the purpose of removing impurities adhering to the anode and adjusting the ionization potential to improve the hole injection property. It is preferable. As the material of the cathode, it is possible to use the material used for the anode described above, but in order to perform electron injection efficiently, a metal having a low work function is preferable, for example, tin, magnesium, indium, calcium, A suitable metal such as aluminum or silver or an alloy thereof is used. Specific examples include low work function alloy electrodes such as magnesium-silver alloy, magnesium-indium alloy, and aluminum-lithium alloy. In addition, only 1 type may be used for the material of a cathode, and 2 or more types may be used together by arbitrary combinations and a ratio.

  The light emitting layer contains at least a material having a light emitting property (light emitting material) as a constituent material, and preferably a compound having a hole transporting property (hole transporting compound) or an electron transporting material. Contains a compound having properties (electron transporting compound). A light emitting material may be used as a dopant material, and a hole transporting compound, an electron transporting compound, or the like may be used as a host material. There is no particular limitation on the light-emitting material, and a material that emits light at a desired light emission wavelength and has favorable light emission efficiency may be used. Furthermore, the light emitting layer may contain other components as long as the effects of the present invention are not significantly impaired. In addition, when forming a light emitting layer with a wet film-forming method, it is preferable to use a low molecular weight material in any case.

  Any known material can be applied as the light emitting material. For example, a fluorescent material or a phosphorescent material may be used, but a phosphorescent material is preferable from the viewpoint of internal quantum efficiency. Alternatively, blue may be used in combination, such as using a fluorescent material, and green and red using a phosphorescent material.

For the purpose of improving the solubility in a solvent, it is preferable to reduce the symmetry and rigidity of the molecules of the luminescent material, or to introduce a lipophilic substituent such as an alkyl group.
Hereinafter, examples of fluorescent light emitting materials (fluorescent dyes) among the light emitting materials will be given, but the fluorescent dyes are not limited to the following examples.

  Examples of fluorescent dyes that give blue light emission (blue fluorescent dyes) include naphthalene, perylene, pyrene, chrysene, anthracene, coumarin, p-bis (2-phenylethenyl) benzene, and derivatives thereof.

Examples of fluorescent dyes that give green light emission (green fluorescent dyes) include quinacridone derivatives, coumarin derivatives, and aluminum complexes such as Al (C9H6NO) 3.
Examples of fluorescent dyes that give yellow light (yellow fluorescent dyes) include rubrene and perimidone derivatives.

Examples of fluorescent dyes that give red luminescence (red fluorescent dyes) include DCM (4- (dicyanomethylene) -2-methyl-6- (p-dimethylaminostyryl) -4H-pyran) compounds, benzopyran derivatives, rhodamine derivatives, benzoates. Examples thereof include thioxanthene derivatives and azabenzothioxanthene.
Examples of the phosphorescent material include an organometallic complex containing a metal selected from Groups 7 to 11 of the periodic table. For the periodic table, IUPAC 2005 recommended version can be referred to.

  Preferred examples of the metal selected from Groups 7 to 11 of the periodic table include ruthenium, rhodium, palladium, silver, rhenium, osmium, iridium, platinum, and gold.

  As the ligand of the complex, a ligand in which a (hetero) aryl group such as a (hetero) arylpyridine ligand or a (hetero) arylpyrazole ligand and a pyridine, pyrazole, phenanthroline, or the like is connected is preferable. A pyridine ligand and a phenylpyrazole ligand are preferable. Here, (hetero) aryl represents an aryl group or a heteroaryl group.

  Specific examples of the phosphorescent material include tris (2-phenylpyridine) iridium, tris (2-phenylpyridine) ruthenium, tris (2-phenylpyridine) palladium, bis (2-phenylpyridine) platinum, tris (2- Phenylpyridine) osmium, tris (2-phenylpyridine) rhenium, octaethyl platinum porphyrin, octaphenyl platinum porphyrin, octaethyl palladium porphyrin, octaphenyl palladium porphyrin, and the like.

The light emitting layer may contain a hole transporting compound as a constituent material. Here, among the hole transporting compounds, examples of the low molecular weight hole transporting compound include various compounds exemplified as the charge transporting compound in the first charge transporting layer, for example, Aromatic diamine represented by 4′-bis [N- (1-naphthyl) -N-phenylamino] biphenyl containing two or more tertiary amines and two or more condensed aromatic rings substituted with nitrogen atoms (Japanese Patent Laid-Open No. 5-234681), aromatic amine compounds having a starburst structure such as 4,4 ′, 4 ″ -tris (1-naphthylphenylamino) triphenylamine (Journal of Luminescence, 1997, Vol. 72-74, pp. 985), an aromatic amine compound comprising a tetramer of triphenylamine (Chemical
Communications, 1996, pp. 2175), 2,2 ′, 7,7′-tetrakis- (diphenylamino) -9,9′-spirobifluorene, etc. (Synthetic Metals, 1997, Vol. 91, pp. 209) and the like. It is done.

  In the light emitting layer, only one type of hole transporting compound may be used, or two or more types may be used in any combination and ratio. The ratio of the hole transporting compound in the light emitting layer is arbitrary as long as the effect of the present invention is not significantly impaired, but is usually 0.1% by weight or more and usually 65% by weight or less. If the amount of the hole transporting compound is too small, it may be easily affected by a short circuit, and if it is too large, the film thickness may be uneven. In addition, when using together 2 or more types of hole transportable compounds, it is made for the total content of these to be contained in the said range.

Further, the light emitting layer may contain an electron transporting compound as a constituent material thereof. Here, among the electron transporting compounds, examples of low molecular weight electron transporting compounds include 2,5-bis (1-naphthyl) -1,3,4-oxadiazole (BND), 2,5, -Bis (6 '-(2', 2 "-bipyridyl))-1,1-dimethyl-3,4-diphenylsilole (PyPySPyPy), bathophenanthroline (BPhen), 2,9-dimethyl-4,7 -Diphenyl-1,10-phenanthroline (BCP, bathocuproin), 2- (4-biphenylyl) -5- (p-tertiarybutylphenyl) -1,3,4-oxadiazole (tBu-PBD), 4 , 4′-bis (9-carbazole) -biphenyl (CBP), etc. In the light emitting layer 5, only one type of electron transporting compound may be used, or two or more types may be combined arbitrarily. It may be used in combination with so and proportions.

  The light emitting layer can be formed by a wet film formation method, a vacuum deposition method, or a known method. Note that the light emitting layer may be formed using a known material or a known method other than those described above. Moreover, the organic electroluminescent element 51 may have another layer arbitrarily other than the structure mentioned above, unless the meaning of this invention is impaired. For example, you may have a hole-blocking layer, an electron carrying layer, an electron injection layer, etc. Note that these layers can be formed by a known material or a known method. Specifically, the materials and methods described in JP 2012-190880 A, JP 2011-102960 A, and the like can be used. Can be formed.

<2-3-2. Thin Film Transistor 52>
Further, as shown in FIG. 9, the organic electroluminescent device 23 used in the present invention may have a thin film transistor 52. Organic electroluminescent devices are roughly classified into active matrix type and passive matrix type. In the case of active matrix type organic electroluminescent devices, switching elements such as thin film transistors are usually included. In general, active matrix organic electroluminescent devices have the advantages of higher resolution and lower power consumption than passive matrix organic electroluminescent devices. This organic electroluminescence device has an advantage of high productivity because the manufacturing process is simple. In the present invention, either a passive matrix type organic electroluminescent device or an active matrix type organic electroluminescent device can be used. However, an active matrix type organic electroluminescent device is shown in FIG. As described above, the organic electroluminescent device 23 preferably includes the thin film transistor 52.

  The thin film transistor 52 serves as a switch for selecting which organic electroluminescence element emits light in the organic electroluminescence device in which the plurality of organic electroluminescence elements 51 are arranged. In the organic electroluminescent device, usually, two or more thin film transistors 52 are electrically connected to one organic electroluminescent element. Hereinafter, the connection relationship between the organic electroluminescent element 51 and the thin film transistor 52 will be described with reference to FIG. FIG. 4 shows a part of an active matrix organic electroluminescent device in an equivalent circuit. The first thin film transistor 52 a and the second thin film transistor 52 b each have a gate electrode and a source / drain electrode, and the gate electrode of the first thin film transistor 52 a is connected to the scanning line 55. One of the source and drain electrodes of the first thin film transistor 52a is connected to the signal line 53, and the other of the source and drain electrodes is connected to the gate electrode of the second thin film transistor 52b. One of the source / drain electrodes of the second thin film transistor 52 b is connected to the anode or cathode of the organic electroluminescent element 51, and the other of the source / drain electrodes is connected to the power supply line 54.

  The switching operation between the source and drain electrodes is performed by the potential of the gate electrode of the first thin film transistor 52a. Specifically, the first thin film transistor 52a receives a signal indicating that the gate electrode of the first thin film transistor 52a is turned on or off from the scanning line 55 connected to a driving circuit (not shown). When turned on, the source and drain electrodes of the first thin film transistor 52a are electrically connected. As a result, the gate electrode of the second thin film transistor 52b is also turned on, current is supplied from the power supply line 54 to the organic electroluminescent element 51 through the second thin film transistor 52b, the organic electroluminescent element 51 emits light, and the image Display and the like can be performed.

  The first thin film transistor 52a and the second transistor 52b may have any structure, but a staggered transistor, an inverted staggered transistor, a coplanar transistor, an inverted coplanar transistor, or the like can be used.

  The first thin film transistor 52a and the second thin film transistor 52b usually have constituent materials such as a semiconductor layer and an insulating film in addition to the above-described gate electrode and source / drain electrode. There is no particular limitation as long as the material can form the film. For example, for the gate electrode and the source / drain electrode, the above-described <2-2-1. Electrode materials and methods mentioned in the anode and cathode described in the solar cell element 6>, and further <2-3-1. It can be formed by the materials and methods for forming the anode and cathode described in the organic electroluminescence device 51>.

  As the semiconductor layer, an inorganic semiconductor material or an organic semiconductor material can be used. As the inorganic semiconductor material, a silicon semiconductor material such as amorphous silicon, single crystal silicon, polycrystalline silicon, or microcrystalline silicon, or a metal such as IGZO is used. Examples thereof include oxide semiconductor materials. On the other hand, as an organic semiconductor material, <2-2-1. Materials and forming methods that can be used for the photoelectric conversion layer of the solar cell element 6>, and the above <2-3-1. It can form using the material and method which can be used for the light emitting layer of the organic electroluminescent element 51>.

  The insulating film is not particularly limited as long as it is an insulating material, and can be formed using a known material. Specifically, an inorganic material such as silicon oxide or silicon nitride, or an organic material such as polyimide can be used.

  Moreover, after forming the film | membrane which forms each layer, the thin-film transistor 52 is producible by patterning by a well-known method as needed. Specifically, a thin film transistor can be manufactured by a method described in publicly known document 2013-25307.

<2-3-3. Sealant 61>
Moreover, the organic electroluminescent element 51 included in the organic electroluminescent device 23 may be sealed with a sealing material 61 as shown in FIG. The material that can be used for the sealing material 61 is not particularly limited, but the above-described <2-2-3. The materials described in the sealing materials 5 and 7> can be used.

  The organic electroluminescent device 23 may have a substrate 62. If each component of the organic electroluminescent device described above is formed in advance on the substrate 62 and the organic electroluminescent device is manufactured, the roll screen can be manufactured by pasting the substrate 62 together with the base material of the roll screen. . Although there is no particular limitation on the material used for the substrate 62, <2-1-1. The materials described in the resin layer 24> can be used.

  Furthermore, the organic electroluminescent device is optional and may have components other than those described above. For example, a polarizing plate, a desiccant, a black matrix, a color filter, a reflection plate, a memory, a drive circuit, a light guide plate, a prism sheet, a diffusion plate, and the like can be given.

<2-4. Roll screen manufacturing method>
Although there is no restriction | limiting in the manufacturing method of the roll screen which concerns on this invention, For example, after producing the laminated body for organic electroluminescent devices as shown in FIG. 8 and the laminated body for solar cells as shown in FIG. And a method of performing a laminate sealing step. The laminate shown in FIGS. 8 and 9 can be produced using a known technique. The method of the laminate sealing step is not particularly limited as long as the effects of the present invention are not impaired, but for example, wet lamination, dry lamination, hot melt lamination, extrusion lamination, coextrusion molding lamination, extrusion coating, photocuring adhesive Laminate, thermal laminate, etc. are mentioned. Among them, a laminating method using a photo-curing adhesive having a proven record in organic EL device sealing, a hot melt laminate or a thermal laminate having a proven record in solar cells is preferable, and a hot melt laminate or a thermal laminate is a sheet-like sealing material. It is more preferable at the point which can be used. The heating temperature in the laminate sealing step is usually 130 ° C or higher, preferably 140 ° C or higher, and is usually 180 ° C or lower, preferably 170 ° C or lower. The heating time in the laminate sealing step is usually 10 minutes or longer, preferably 20 minutes or longer, and is usually 100 minutes or shorter, preferably 90 minutes or shorter. The pressure in the laminate sealing step is usually 0.001 MPa or more, preferably 0.01 MPa or more, and usually 0.2 MPa or less, preferably 0.1 MPa or less. Sealing is ensured by setting the pressure within this range, and the dimensional stability is secured by suppressing the protrusion of the sealing materials 5 and 7 and the sealing material 61 from the end portion and the reduction of the film thickness due to overpressure. Yes. In addition, what connected two or more solar cell elements 6 in series or in parallel can be manufactured similarly to the above.

  In the sealing step of the laminate, the laminate of the solar cell and the laminate of the organic electroluminescence device may be simultaneously sealed on the roll screen substrate, or the solar cell laminate may be sealed on the roll screen substrate. After manufacturing a laminated body, you may seal the laminated body of an organic electroluminescent apparatus. Moreover, after sealing the laminated body of an organic electroluminescent apparatus, you may seal a solar cell. Further, the organic electroluminescent device may be directly manufactured on a roll screen substrate.

  According to the present invention, it is possible to provide a solar cell and a roll screen provided with an organic electroluminescent device, in which the organic electroluminescent device is unlikely to deteriorate and the lifetime is unlikely to decrease.

DESCRIPTION OF SYMBOLS 1 Weatherproof protective film 2 UV cut film 3,9 Gas barrier film 4,8 Getter material film 5,7 Sealing material 6 Solar cell element 10 Back sheet 21 Base material 22 Solar cell 23 Organic electroluminescent device 24 Resin layer 25 Metal layer 25a 1st metal layer 25b 2nd metal layer 26a Output terminal 26b Output terminal 29 Holding part 30 Winding pipe 31 Roll screen 32 Discharge controller 33 Storage battery 34a Output terminal 34b Output terminal 35 Roll screen device 40a Input terminal 40b Input terminal 51 Organic Electroluminescence Element 52 Thin Film Transistor 52a First Thin Film Transistor 52b Second Thin Film Transistor 53 Signal Line 54 Power Line 55 Scan Line 61 Sealing Material 62 Substrate

Claims (5)

  A roll screen having a solar cell on one surface of a substrate and an organic electroluminescent device on the other surface, wherein the substrate includes a resin layer and a metal layer.   The metal layer includes a first metal layer and a second metal layer, the first metal layer is disposed between the resin layer and the solar cell, and the second metal layer is formed of the resin. The roll screen according to claim 1, wherein the roll screen is disposed between a layer and the organic electroluminescent device.   The roll screen according to any one of claims 1 and 2, wherein a ratio of the thickness of the metal layer to the thickness of the resin layer is 1/50 or more and 1/4 or less.   The roll screen as described in any one of Claims 1-3 in which the outermost layer by the side of the light-receiving surface of the said solar cell has uneven | corrugated shape.   It is a roll screen apparatus which has a roll screen as described in any one of Claims 1-4, Comprising: Rolling is performed by making the surface of the roll screen which has the said solar cell into the outer side, The roll screen apparatus characterized by the above-mentioned. .

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