JP2011076727A - Photoelectric conversion element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve adhesiveness between terminals extending from an operation electrode and a counter electrode and a bag-shaped sheet body in a photoelectric conversion element where the operation electrode and the counter electrode are housed in the bag-shaped sheet body. <P>SOLUTION: In the photoelectric conversion element, in the region where the terminal 1 formed of a metal electrically connected to the operation electrode 11 and the terminal 15a formed of a metal electrically connected to the counter electrode 15 are extended from the inside of the bag-shaped sheet body 2 to the outside, a part sealing the bag-shaped sheet body while clamping the terminals has a sealing structure constructed by laying, sequentially from the terminal to the outside: a layer 4 brought into contact with the terminal and formed of a heat sealing resin; a metal film or an oxide film 3; and the sheet body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a photoelectric conversion element used for a dye-sensitized solar cell or the like, and in particular, in a photoelectric conversion element in which a working electrode and a counter electrode are sealed together with an electrolytic solution in a bag-like sheet body, leakage of the electrolytic solution is prevented. The present invention relates to a photoelectric conversion element having a sealing structure for collecting current terminals.

  Currently, electronic devices are required to be lightweight, thin, flexible, etc. In order to satisfy these requirements and prevent performance deterioration of these electronic devices, resin exterior bodies are used. The capacitors and solar cells used have been actively developed. Even in an electronic device using a resin-made exterior body, the current collecting terminal is often extended from the inside of the exterior body to the outside, but when the exterior body needs to be sealed, It is necessary to bond the current collecting terminal. As a technique for improving these adhesivenesses when bonding a current collecting terminal to a resin exterior body, there are those described in Patent Documents 1 to 3.

  Patent Document 1 discloses a technique for improving the adhesion between a current collecting terminal and a resin exterior body by providing a resin material having good adhesion to a metal on the surface of the current collecting terminal. Yes. Patent Document 2 discloses a method of covering a current collecting terminal with a thermoplastic synthetic resin film or the like as a sealing method when a resin film is used as an exterior body. Patent Document 3 discloses a method of disposing a resin coating between a current collecting terminal and a resin film.

Furthermore, in Patent Document 4, when sealing using a laminate film, in addition to the metal adhesive resin layer intended to improve the adhesion between the current collecting terminal and the laminate film, For the purpose of preventing a short circuit between the metal layer and the current collecting terminal, a technique is disclosed in which a heat resistant resin layer is provided and sealed using two types of resins.
In addition, in Patent Document 5, as a method for sealing a current collecting terminal, a treatment for forming a hydrated film is performed after the oxide film on the surface of the aluminum electrode is peeled off to improve adhesion with an ionomer resin having a polar group A method for preventing thermal fusion by causing it to occur is disclosed.

  As described above, when a resin film is used as an exterior body of an electronic device, when bonding a current collecting terminal made of metal and a resin film, a thermoplastic synthetic resin film, etc. In general, the heat-fusible resin is interposed between the current collecting terminal and the film.

JP 2008-004506 A Japanese Patent Laid-Open No. 11-087195 Japanese Patent Laid-Open No. 11-121043 JP 2007-242548 A JP 2001-256957 A

By the way, since a photoelectric conversion device such as a solar cell needs to take light into the device, it is necessary to use a highly transparent resin film for the exterior, and a laminate film sandwiching a metal film cannot be used. .
Examples of the resin having high transparency and excellent durability include polyethylene terephthalate (PET) resin and polyethylene naphthalate (PEN) resin. Since these resins are non-polar resins having no polar group, they are poorly fused with metals, and metal current collecting terminals cannot be directly sealed. Therefore, it is necessary to interpose between the resin film and the current collecting terminal, a heat-fusible resin having adhesiveness to metal or glass, using the technique used in the above prior art.

In general, the heat-fusible resin having excellent adhesion to metal and glass includes a resin having a polar group and a modified resin (polar resin) having a polar group introduced therein. However, such a resin having excellent adhesion to metal or glass has poor adhesion to PET resin or PEN resin having no polar group.
That is, in an electronic device such as a solar cell that needs to use a non-polar PET resin for the exterior body, even if the metal current collecting terminal is sealed by interposing the resin having the polar group described above, the terminal It is difficult to prevent the penetration of the contents and the entry of foreign matter from the outside at the sealing portion.

FIG. 11 is a cross-sectional view of a conventional structure in which an electronic device 111 is enclosed in a bag-like laminate film 102 and a current collecting terminal 101 is extended outside an exterior body. The heat-fusible resin 4 is interposed between the laminate film 102 and the current collecting terminal 101, and the laminate film 102 and the current collecting terminal 101 are adhered by the heat-fusible resin 4. Yes.
However, in this configuration, when the film denoted by reference numeral 102 is a film made of PET resin, the adhesiveness between the film 102 made of PET resin and the heat-fusible resin 4 becomes low. This is because, as described above, the PET resin is a nonpolar resin having no polar group, and therefore the adhesiveness with the heat-fusible resin is low. In particular, it was found that when the electrolyte solution 19 was sealed inside the exterior body as in a dye-sensitized solar cell, the strength was 1/10 or less as compared with the case without the electrolyte solution.

  The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a sealing structure with higher strength in a sealing structure for collecting terminals of an electronic device using a highly transparent resin film as an exterior body. It is to provide a sealing structure that can be stopped.

The photoelectric conversion element according to claim 1 of the present invention is a photoelectric conversion element in which a working electrode and a counter electrode are enclosed in a bag-like sheet body together with an electrolyte, and is a metal electrically connected to the working electrode. And a terminal made of metal electrically connected to the counter electrode extending from the inside to the outside of the bag-like sheet body, the bag-like sheet body is sealed across the terminal. A sealing structure in which a part to be stopped is in contact with the terminal outward from the terminal, and a layer made of a heat-fusible resin, a metal film or an oxide film, and the sheet body are sequentially stacked. It is characterized by having.
The photoelectric conversion element according to claim 2 of the present invention is the photoelectric conversion element according to claim 1, wherein the sheet body is a polyester resin.
The photoelectric conversion element according to claim 3 of the present invention is the photoelectric conversion element according to claim 1 or 2, wherein the heat-fusible resin is a resin having a polar group or a modified resin into which a polar group is introduced. It is characterized by that.

  In the photoelectric conversion element of the present invention, in the portion where the metal terminal extends from the inside of the bag-shaped sheet body to the outside, the portion that seals the bag-shaped sheet body across the terminal is outward from the terminal. On the other hand, a layer made of a heat-fusible resin, a metal film or an oxide film, and a sheet body were sequentially stacked in contact with the terminal. In this structure, even if the sheet body is a non-polar resin such as a PET resin or a PEN resin, the sheet body has a structure in which the polarities are matched at each interface between the layer and the film interposed between the sheet body and the terminal. The effect that the adhesiveness between the terminal and the terminal is improved is obtained.

It is a perspective view which shows embodiment of the photoelectric conversion element which concerns on this invention. It is a schematic sectional drawing of the sealing structure of this invention which follows the AA line of FIG. It is the schematic which shows the manufacturing method of the photoelectric conversion element which concerns on the 1st Embodiment of this invention. It is the schematic which shows the manufacturing method of the photoelectric conversion element which concerns on the 2nd Embodiment of this invention. It is the schematic which shows the formation method of a metal film layer and a heat-fusible resin layer in the sheet | seat body which concerns on the 3rd Embodiment of this invention. It is the schematic which shows the method of coat | covering the terminal for current collection which concerns on the 3rd Embodiment of this invention with a heat-fusible resin. It is the schematic which shows the manufacturing method of the photoelectric conversion element which concerns on the 3rd Embodiment of this invention. It is the schematic which shows the manufacturing method of the photoelectric conversion element which concerns on the 4th Embodiment of this invention. It is a top view which shows another embodiment of the photoelectric conversion element which concerns on this invention. It is a schematic sectional drawing which follows the CC line of FIG. It is a schematic sectional drawing which shows the conventional sealing structure.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an external appearance of a photoelectric conversion element according to the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 and shows details of the embodiment of the present invention.
As shown in FIGS. 1 and 2, the photoelectric conversion element 10 according to the present invention has a working electrode 11, a counter electrode 15, and a separator 18 disposed between the two sheets in a bag shape. The structure is housed in a thing. The sheet body 2 has a rectangular shape that is slightly larger than the enclosing working electrode and the like, and is adhered on its four sides to enclose the working electrode 11, the counter electrode 15, the separator 18, and the like.

The working electrode 11 includes a substrate 12 and a porous oxide semiconductor layer 14 carrying a sensitizing dye formed on a surface facing the counter electrode 15. A light-transmitting plate material is used as the substrate 12, and a transparent conductive film 13 is disposed on the surface of the substrate 12 in contact with the porous oxide semiconductor layer 14 in order to provide conductivity.
The counter electrode 15 is composed of a plate-like conductive substrate 16 and a catalyst film 17 formed on the surface facing the working electrode 11. The catalyst film 17 is made of Pt so that the conductive substrate 16 has a catalyst function.
Inside the bag-shaped sheet body 2, the working electrode 11 and the counter electrode 15 are arranged so that the porous oxide semiconductor layer 14 and the catalyst film 17 face each other, and a separator 18 is inserted between them.

  As the substrate 12 constituting the working electrode 11, a substrate made of a light transmissive material is used, and glass, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyethersulfone, etc., which are usually used as transparent substrates for solar cells. Anything can be used. The substrate 12 is appropriately selected from these in consideration of the resistance to the electrolytic solution 19 and the like, but a substrate that is as excellent in light transmittance as possible is preferable.

The transparent conductive film 13 is a thin film made of metal, carbon, conductive metal oxide or the like for imparting conductivity to the substrate 12. When a metal thin film or a carbon thin film is formed as the transparent conductive film 13, a structure that does not significantly impair the transparency of the substrate 12 is adopted. Examples of the conductive metal oxide that forms the transparent conductive film 13 include indium-tin oxide (ITO), tin oxide (SnO ₂ ), and fluorine-doped tin oxide.

The porous oxide semiconductor layer 14 is provided on the transparent conductive film 13, and a sensitizing dye is supported on the surface thereof. The semiconductor that forms the porous oxide semiconductor layer 14 is not particularly limited, and any semiconductor that can be used to form a porous semiconductor for solar cells can be used. As such a semiconductor, for example, titanium oxide (TiO ₂ ), tin oxide (SnO ₂ ), tungsten oxide (WO ₃ ), zinc oxide (ZnO), niobium oxide (Nb ₂ O ₅ ), or the like can be used. .
Examples of the method for forming the porous oxide semiconductor layer 14 include film formation from a sol-gel method, electrophoretic electrodeposition of fine particles, porous formation with a foaming agent, removal of excess components after application of a mixture with polymer beads, and the like. However, it is not limited to these methods.

  Examples of the sensitizing dye include ruthenium complexes such as N719, N3, and black dye, metal-containing complexes such as porphyrin and phthalocyanine, and organic dyes such as eosin, rhodamine, and merocyanine. From the above, it is only necessary to appropriately select one having an excitation behavior suitable for the application and the semiconductor used.

  As the electrolytic solution 19, an electrolytic solution in which an electrolyte component such as iodine, iodide ion, or tertiary butyl pyridine is dissolved in an organic solvent or ionic liquid such as ethylene carbonate or methoxyacetonitrile is used.

The conductive substrate 16 constituting the counter electrode 15 has a conductive plate shape, and in this embodiment is formed of a Ti plate. However, the conductive substrate 16 is conductive and resistant to the electrolytic solution 19. There is no limitation to this.
The catalyst film 17 is a thin film made of a metal such as platinum, carbon, or the like, which is formed to give the conductive substrate 16 a catalyst function. As the catalyst film 17, for example, a layer of carbon, platinum, or the like, which has been heat-treated after vapor deposition, sputtering, and chloroplatinic acid coating is preferably used. Absent.

  A separator 18 made of a non-conductive material is inserted between the working electrode 11 and the counter electrode 15 in order to prevent a short circuit between the working electrode 11 and the counter electrode 15. The material of the separator 18 is polyolefin such as polyethylene, but is not limited thereto as long as it can withstand the electrolytic solution and can insulate the working electrode 11 and the counter electrode 15.

Furthermore, the working electrode 11, the counter electrode 15, and the separator 18 are configured to be sandwiched between the sheet bodies 2 formed of PET resin, and the four sides of the sheet body 2 are crimped by thermocompression bonding (heat sealing). Thereby, the electrolyte 19 is sealed inside the bag-shaped sheet body 2.
The sheet body 2 is not limited to a PET resin, and any suitable resin can be used as long as it is a transparent resin. However, a polyester resin containing the PET resin and the PEN resin is preferable.

  For current collection, a terminal 1 electrically connected to the working electrode 11 and a terminal 15a for the counter electrode 15 extend from the sealing portion S to the outside of the bag-shaped sheet body 2. The terminal 1 is formed of a Ti foil, but is not limited to this as long as it has conductivity and resistance to the electrolytic solution 19. The terminal 15 a for the counter electrode 15 is composed of a part of the conductive substrate 16 constituting the counter electrode 15.

Next, the sealing part will be described.
In the sealing portion S, the terminal 1 connected to the working electrode 11 and the terminal 15 a of the counter electrode 15 are sandwiched between the sheet bodies 2. A part of the terminals 1 and 15a and a part constituting the sealing part S (indicated by reference numeral S in FIGS. 2 and 3) is attached with a heat-fusible resin 4, and the heat-fusible resin. A layer made of resin is formed. On the other hand, a metal film 3 is formed on a part of the sheet body 2 and on a portion constituting the sealing portion S, that is, a surface in contact with the terminals 1 and 15a.
Therefore, the sealing part S has a configuration in which the terminals 1 and 15a, the film 4 made of the heat-fusible resin, the metal film 3, and the sheet body 2 are stacked in the direction away from the terminals 1 and 15a. .

Examples of the heat-fusible resin 4 include a resin having a polar group, a film of a modified resin into which a polar group is introduced, for example, an ethylene copolymer having a polar group in a molecular chain such as EMAA or ionomer, polyethylene, An acid-modified product of polyolefin such as polypropylene can be used. Specific examples include High Milan, Nuclerel (Mitsui DuPont Polychemical Co., Ltd.), Binnel (DuPont Co., Ltd.), Adtex (Nippon Polyethylene Co., Ltd.), Primacol (Dow Chemical Co., Ltd.), and the like.
The metal constituting the metal film 3 is preferably Ti, but the composition is preferably the same as the metal constituting the current collecting terminal or the metal having the same degree of corrosion resistance to the electrolytic solution. The thickness of the metal film 3 is preferably about 20 nm.

In addition, as a film | membrane formed in the sheet | seat body 2, not only a metal film but a glass (silicon oxide) film | membrane may be sufficient. As the glass film, a dense film and a film that does not contain impurities are preferable. However, the glass film is not limited to this as long as it has corrosion resistance to an electrolytic solution and is excellent in adhesiveness to a heat-fusible resin.
Further, the film formed on the sheet body 2 may be a metal oxide film. As the metal oxide film, aluminum oxide, titanium oxide, or the like can be employed. Note that the glass film (silicon oxide film) and the metal oxide film can be defined as oxide films because they are oxide-containing films.

  By forming the metal film 3 on the sealing portion S on the side facing the terminals 1 and 15a in the sheet body 2, the adhesion between the layer 4 made of the heat-fusible resin and the sheet body 2 is improved. Since the adhesiveness between the layer 4 made of the heat-fusible resin and the current collecting terminal 1 is originally high, as a result, the adhesiveness between the current collecting terminal 1 and the sheet body 2 in the sealing portion is improved. It becomes a sealing structure with little leakage of the electrolyte solution 19 and the like.

Next, a method for forming the sealing portion S will be described with reference to FIG.
(1) A film 4 made of a heat-fusible resin is attached to the terminals 1 and 15a. Here, the width (the left-right direction in FIG. 3) of the film 4 made of heat-fusible resin is slightly wider than the width of the terminals 1 and 15a.
(2) The metal film 3 is formed on the portion constituting the sealing portion S of the sheet body 2. The metal film 3 is formed using a sputtering method.
The sheet body 2 is placed in a vacuum, and etching (reverse sputtering) is performed for 1 minute in an argon atmosphere of 7 × 10 ⁻³ Torr to clean the surface of the sheet body, and then Ti is used for 3 minutes in the same atmosphere. Sputtering is performed to form a film corresponding to 20 nm. The width of the metal film 3 (left and right direction in FIG. 3) is about 1.5 times the width of the heat-fusible resin 4.
(3) The sealing structure of this application is completed by carrying out heat sealing | fusion sealing from the up-down direction using a heat sealer (FIG.3 (b)).

As an alternative to the metal film 3 formed on the sheet body 2, an oxide film such as a glass film or a metal oxide film may be deposited. As the vapor deposition method, resistance heating or vacuum vapor deposition by electron beam heating is preferable.
Similar results can also be obtained by a vapor deposition method using sputtering or ion plating.

As described above, the structure in which the metal film 3 is formed on the sheet body 2 made of the PET resin improves the adhesion between the sheet body 2 and the film 4 made of the heat-fusible resin. Further, the peel strength was 8 N / cm, and the strength was improved as compared with a configuration in which the metal film 3 was not formed on the sheet body 2 (peel strength 0.2 N / cm). In the peel test, peeling occurred between the terminals 1 and 15a and the film 4 made of the heat-fusible resin.
Even when a dye-sensitized solar cell was actually produced using a sheet body made of PET resin, it was confirmed that the electrolyte solution did not leak.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG.
The second embodiment is a sealing structure having a cross-sectional configuration similar to that of the first embodiment, but the manufacturing method is different from that of the first embodiment. Hereinafter, the manufacturing method will be described.
The second embodiment is a manufacturing method in which the heat-sealing property with the exterior sheet body 2 made of PET resin is enhanced by forming a coating 2a of PET resin around the terminals 1 and 15a.

Hereinafter, a manufacturing method of the sealing structure according to the second embodiment will be described.
(1) Separately prepare a sheet body 2a having the same composition as the nonpolar resin such as PET resin used as the sheet body, and form a metal film 3a on the surface of the sheet body 2a (FIG. 4A).
(2) A film 4a made of a heat-fusible resin is sandwiched between the terminals 1 and 15a and the sheet body 2a, and heat-sealing coating is performed using a heat sealer (FIG. 4B). Thereby, the current collecting terminal 1a covered with the sheet body 2a having the same composition as the sheet body 2 as the exterior film is completed.
(3) The terminals 1 and 15a were sandwiched between the sheet bodies 2 (FIG. 4C), and heat sealing was performed using a sheet sealer (FIG. 4D).

The above configuration is excellent in the heat-sealing property between the sheet bodies having the same composition, and thus the sealing reliability is improved. Further, the peel strength was 8 N / cm, and the strength was increased as compared with the configuration (0.2 N / cm) in which the metal film 3 was not formed on the sheet body 2. When the peel test was performed, peeling occurred between the current collecting terminal 1 and the film 4 made of the heat-fusible resin.
Even when a dye-sensitized solar cell was actually produced using a sheet body made of PET resin, it was confirmed that the electrolyte solution did not leak.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG. 5, FIG. 6, and FIG.
The third embodiment is a sealing structure having a cross-sectional configuration similar to that of the first embodiment, but the manufacturing method is different from that of the first embodiment. Hereinafter, the manufacturing method will be described.
The third embodiment is a manufacturing method in which a layer of a heat-fusible resin is provided on each of the terminals 1 and 15a and the exterior sheet body 2, and these layers are heat-sealed.

Hereinafter, a manufacturing method of the sealing structure according to the third embodiment will be described.
(1) Separately prepare a sheet piece 2b having the same composition as the nonpolar resin such as PET resin used as the sheet, and form a metal film 3b on the surface of the sheet piece 2b (FIG. 5A).
(2) The sheet body 2 and the sheet body piece 2b are heat-sealed using a heat sealer so that the sheet body 2 and the sheet body piece 2b face each other. Further, a film 4b made of a heat-fusible resin cut to the same dimensions as the sheet body piece 2b is heat-sealed on the metal film 3b formed on the sheet body piece 2b using a heat sealer, and heat-sealed. The conductive resin exterior sheet body 2B was produced.
(3) The terminals 1 and 15a are sandwiched between films 4c made of heat-fusible resin (FIG. 6A), and the terminals 1 and 15a are covered with film 4c made of heat-fusible resin using a heat sealer. The prepared terminal 1c was produced (FIG. 6B).
(4) The heat-sealable resin exterior sheet 2B produced in (2) and the terminal 1c produced in (3) are aligned (FIG. 7 (a)), and the upper and lower surfaces of the current collecting terminal 1c are It superimposes so that the heat-fusible resin surface of the sheet | seat body 2B may match (FIG.7 (b)). Finally, these are heat-sealed with a heat sealer to be integrated.

In the above configuration, the terminals 1 and 15a are covered with a film having the same composition as the heat-sealable resin, and the exterior sheet body 2 is also provided with a portion made of the same heat-sealable resin. Since heat-sealable resins having the same composition are excellent in heat-sealability, sealing reliability is improved. Further, the peel strength was 8 N / cm, and the strength was increased as compared with the configuration (0.2 N / cm) in which the metal film 3 was not formed on the sheet body 2. In the peel test, peeling occurred between the current collecting terminal 1 and the film 4c made of the heat-fusible resin.
Even when a dye-sensitized solar cell was actually produced using a sheet body made of PET resin, it was confirmed that the electrolyte solution did not leak.

(Fourth embodiment)
A metal film 3d is formed on four sides of the rectangular sheet body 2, a film 4d made of a heat-fusible resin having a shape corresponding to the metal film 3d is produced, and the terminals 1 and 15a are heat sealed. The metal film 3d is formed along the outer shape of the sheet body 2 in contrast to the first embodiment in which the metal film is formed only at the portion that contacts the terminals 1 and 15a. The method of forming a metal film by sputtering is the same as in the first embodiment.
FIG. 8 is a sectional view taken along line BB in FIG. FIG. 8A is a schematic view before heat fusion, and FIG. 8B is a schematic view after heat fusion.
As shown in FIG. 8A, the metal film 3d is formed along the side of the sheet body 2 as well as the portion where the terminals 1 and 15a abut. The film 4d made of heat-fusible resin has a shape corresponding to the metal film 3d.

  By adopting the above configuration, reliable sealing can be realized regardless of the position of the terminals 1 and 15a.

Further, the present invention can also be employed in the photoelectric conversion element 10a (see FIG. 9) employing a mesh-like (textile-like) working electrode. By using a mesh-like working electrode, it is possible to manufacture a photoelectric conversion element with higher flexibility.
FIG. 9 is a plan view of the photoelectric conversion element 10a, and FIG. 10 is a cross-sectional view taken along the line CC of FIG.
This photoelectric conversion element forms a mesh-like working electrode 20 by knitting conductive linear substrates 20a and 20b into a net. In a state of being overlapped with the working electrode 20, the counter electrode 21, and the separator 18a, the two sheet bodies 2a are encapsulated together with the electrolytic solution 19 in a bag shape.

A terminal 1a connected to at least one of the base material 20a or 20b constituting the working electrode 20 and a terminal 21a composed of a part of the counter electrode 21 extend outside the bag-like sheet body 2a. . On the sealing portion R of these terminals 1a and 21a, a heat-fusible resin 4 is affixed to form a layer made of the heat-fusible resin. On the other hand, the metal film 3 is formed in the sealing region R on the side facing the terminals 1a and 21a in the sheet body 2a.
Also in this embodiment, it goes without saying that an oxide film such as a glass film or a metal oxide film can be used as an alternative to the metal film 3.
It is of course possible to adopt the sealing forms of the second to fourth embodiments.

  Instead of depositing a metal film or an oxide film such as a glass film or a metal oxide film on the PET resin, a PET resin film (for example, Tech Barrier (registered trademark), manufactured by Mitsubishi Plastics) coated with a silica film is used. May be.

DESCRIPTION OF SYMBOLS 1 ... Terminal, 2 ... Sheet body, 3 ... Metal film, 4 ... Layer which consists of heat-fusible resin, 10 ... Photoelectric conversion element, 11 ... Working electrode, 12 ... Substrate, 13 ... Transparent conductive film, 14 ... Porous Oxide semiconductor layer, 15 ... counter electrode, 16 ... conductive substrate, 17 ... catalyst film, 18 ... separator, 19 ... electrolyte.

Claims (3)

A photoelectric conversion element in which a working electrode and a counter electrode are enclosed in a bag-like sheet body together with an electrolyte,
In the portion where the terminal made of metal electrically connected to the working electrode and the terminal made of metal electrically connected to the counter electrode extend from the inside of the bag-shaped sheet body, the terminal A portion for sealing the bag-like sheet body sandwiching the substrate, contacting the terminal outward from the terminal, a layer made of a heat-fusible resin, a metal film or an oxide film, and the sheet A photoelectric conversion element having a sealing structure in which a body is sequentially stacked.   The photoelectric conversion element according to claim 1, wherein the sheet body is a polyester resin.   The photoelectric conversion element according to claim 1, wherein the heat-fusible resin is a resin having a polar group or a modified resin having a polar group introduced.

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