JP2012104484A - Dye-sensitized solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To seal holes, which are formed on a glass substrate of a dye-sensitized solar cell for injecting an electrolyte or discharging air, with lids while maintaining aesthetic appearance.SOLUTION: A dye-sensitized solar cell includes plugs mechanically pressed into holes formed on a glass substrate to seal the holes.

Description

    The present invention relates to a dye-sensitized solar cell, and more particularly to a dye-sensitive solar cell formed on a glass substrate and sealing a hole for injecting electrolyte or discharging air to prevent leakage of the electrolyte. Is.

In general, a dye-sensitive solar cell is composed of a positive electrode transparent electrode, an upper glass substrate and a lower glass substrate coated with a negative electrode transparent electrode, a catalyst layer finely applied to a monolayer thin film level on the positive electrode transparent electrode, A TiO ₂ layer attached on the negative electrode transparent electrode, and a sealing material that seals the internal electrolyte while maintaining a distance are provided so that the positive electrode transparent electrode and the negative electrode transparent electrode do not contact each other. The internal space formed between the positive glass substrate and the negative glass substrate is filled with an electrolyte.

    Here, in order to inject the electrolyte into the internal space formed between the positive electrode glass substrate and the negative electrode glass substrate, a hole (Hole) for injecting the electrolyte into the positive electrode glass substrate or the negative electrode glass substrate or exhausting air is provided. One or more of each is formed. These holes are sealed with a lid after electrolyte injection is completed.

    The above-described technical configuration is a background technique for helping understanding of the present invention, and does not mean a conventional technique widely known in the technical field to which the present invention belongs.

    Conventional dye-sensitive solar cells are formed on a glass substrate and sealed by adhering a lid with an adhesive to a hole for injecting an electrolyte or discharging air. However, since the lid is attached in a protruding manner on the surface of the glass substrate, the appearance of the product may be impaired.

    Further, in order to firmly attach the lid to the glass substrate using the adhesive, the foreign matter attached to the adhesive surface must be completely removed. However, when a cleaning agent or the like is used in a state where the hole for injecting the electrolyte or discharging the air is not sealed, the cleaning agent may be mixed into the electrolyte and the electrolyte may be contaminated. In addition, there is a possibility that air bubbles may be formed inside the solar cell, which makes it difficult to thoroughly clean the bonding surface.

    The present invention was devised to improve the above-described problems, and is formed on a positive electrode glass substrate and a negative electrode glass substrate, and injects an electrolyte or discharges air between the positive electrode glass substrate and the negative electrode glass substrate. An object of the present invention is to provide a dye-sensitized solar cell in which a plug is mechanically press-fitted into a hole formed in such a manner and sealed.

    A dye-sensitized solar cell according to an aspect of the present invention includes a glass substrate having a hole for injecting an electrolyte or discharging air, and a plug that is press-fitted into the hole to seal the hole. To do.

    The hole of the present invention is formed to penetrate the glass substrate, and the plug is inserted so as to be vertically symmetrical from the center of the hole.

    The plug of the present invention is characterized by having an elastic force.

    The plug according to the present invention is characterized in that it has a spherical shape or a tapered shape, or has a rounded or tapered end portion.

    The plug according to the present invention includes a hollow portion formed so as to penetrate in the press-fitting direction.

    The plug according to the present invention includes an insertion hole formed so as to penetrate the plug in a press-fitting direction, and an insertion portion is inserted into the insertion hole.

    The present invention further includes a locking portion that locks the plug of the present invention while applying pressure in the vertical direction.

    The locking part of the present invention includes a pin inserted into the insertion hole, a head formed on one side of the pin to compress the plug, and a pin through hole through which the pin penetrates, and the pin penetrates. And a retainer for compressing the plug.

    The present invention can quickly inject an electrolyte when manufacturing a dye-sensitized solar cell, and can prevent bubbles from being formed in the process of injecting and sealing the electrolyte. The state can be maintained.

It is a figure which shows the dye-sensitized solar cell by one Example of this invention. It is a figure which shows the dye-sensitized solar cell by one Example of this invention. It is a figure which shows the dye-sensitized solar cell by one Example of this invention. It is a figure which shows the dye-sensitized solar cell by one Example of this invention. It is a figure which shows the example by which the outer diameter of the plug by one Example of this invention was formed larger than the internal diameter of a hole, and was sealed. It is a figure which shows the example by which the outer diameter of the plug by one Example of this invention was formed larger than the internal diameter of a hole, and was sealed. It is a figure which shows the example by which the outer diameter of the plug by one Example of this invention was formed larger than the internal diameter of a hole, and was sealed. It is a figure which shows the example by which the outer diameter of the plug by one Example of this invention was formed larger than the internal diameter of a hole, and was sealed. It is a figure which shows the example by which the outer diameter of the plug by one Example of this invention was formed larger than the internal diameter of a hole, and was sealed. It is a figure which shows the example by which the outer diameter of the plug by one Example of this invention was formed larger than the internal diameter of a hole, and was sealed. It is a figure which shows the example sealed using the bag material by one Example of this invention. It is a figure which shows the example sealed using the bag material by one Example of this invention. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate. It is a figure which shows the example by which the plug by one Example of this invention was sealed, compressively deforming to the glass substrate.

    Hereinafter, a dye-sensitized solar cell according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for the sake of clarity and convenience. Moreover, the term mentioned later is a term defined in consideration of the function in this invention, and these may differ according to a user's, an operator's intention, or a custom. Therefore, the definition of such terms should be made based on the contents of the present invention in general.

    The terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular includes the plural unless specifically stated otherwise in the text. As used herein, "includes" and "includes" refers to a component, step, operation, and / or element that is mentioned is the presence or addition of one or more other components, steps, operations, and / or elements. Do not exclude.

    1 to 4 are diagrams showing a dye-sensitized solar cell according to an embodiment of the present invention.

A dye-sensitized solar cell according to an embodiment of the present invention includes a positive electrode glass substrate 11 and a negative electrode glass substrate 12 coated with a positive electrode transparent electrode (not shown) and a negative electrode transparent electrode (not shown), and a positive electrode transparent electrode. The catalyst layer (not shown) finely applied to the monoatomic layer thin film, the TiO ₂ layer (not shown) attached on the negative electrode transparent electrode, and the positive electrode transparent electrode and the negative electrode transparent electrode are not in contact with each other. A sealing material 50 is provided to seal the electrolyte 40 inside while maintaining the interval. The internal space formed between the positive glass substrate 11 and the negative glass substrate 12 is filled with the electrolyte 40.

    The dye-sensitized solar cell according to the embodiment of the present invention includes a glass substrate 10 having a hole 70 formed so as to inject an electrolyte 40 or exhaust air, and a plug inserted into the hole 70 to seal the hole 70. 90.

    That is, at least two or more holes 70 are formed in the glass substrate 10 so as to inject an electrolyte or discharge air into an internal space formed between the glass substrates 10. The plug 90 is mechanically press-fitted into the hole 70 to seal the hole 70.

    The plug 90 is formed so as to correspond to the shape of the hole 70 and is pressed into the hole 70 to seal the hole 70.

    The plug 90 is formed of a non-conductive material that does not conduct electricity. This is because the plug 90 is in contact with both the positive electrode transparent electrode and the negative electrode transparent electrode, so that a short circuit does not occur between the two electrodes.

    At least two holes 70 are formed in any one of the positive glass substrate 11 and the negative glass substrate 12 or in all the glass substrates 10.

    In this specification, an example in which two holes 70 are provided will be described.

    The holes 70 may be formed in the glass substrate 10 in various shapes and directions such as a cylindrical shape or a tapered shape.

    As shown in FIG. 1, it is formed perpendicular to the negative glass substrate 12, or as shown in FIG. 2, it is formed obliquely from the corner of the negative glass substrate 12, or as shown in FIG. In addition, it may be formed in parallel with the negative glass substrate 12 and the positive glass substrate 11 at the bonding site of the sealing material 50. Further, as shown in FIG. 4, it may be formed in a direction perpendicular to the glass substrate 10 so as to penetrate all the two glass substrates 10.

    As shown in a) and b) of FIG. 1, when the hole 70 is formed perpendicular to the negative electrode glass substrate 12, the plug 90 is press-fitted in a direction perpendicular to the negative electrode glass substrate 12.

    After the plug 90 is press-fitted into the hole 70, as shown in FIG. 1c), the outside of the negative electrode glass substrate 12, the inner diameter portion of the hole 70, and electrolytes and other impurities attached around the hole 70 are additionally provided. The bag material 100 may be further added and used.

    Here, the bag material 100 may employ an adhesive such as an epoxy that cures at room temperature, or a high-temperature fusing material such as a glass-frit or a metal solder.

    FIG. 2 shows that the hole 70 is formed obliquely from the negative electrode glass substrate 12, but the plug 90 is formed in the internal space formed between the negative glass substrate 12 and the positive glass substrate 11 through the hole 70. It is press-fitted in an oblique direction.

    FIG. 3 shows that the plug 90 is formed in parallel with the glass substrate 10 and press-fitted into the bonding portion of the sealing material 50, but the plug 90 is parallel to the negative glass substrate 12 and the positive glass substrate 11 through the holes 70. Press fit in the direction.

    Here, even if the hole 70 is formed obliquely with the negative glass substrate 12 or formed in a parallel direction, the bag material 100 may be additionally used after the plug 70 is press-fitted.

    FIG. 4 shows that the hole 70 is formed so as to penetrate the two glass substrates 10 in the vertical direction.

    In particular, the hole 70 is provided at a symmetrical position between the positive glass substrate 11 and the negative glass substrate 12 and is formed so as to penetrate the positive glass substrate 11 and the negative glass substrate 12 in the vertical direction, so that the plug 90 is a hole. The internal pressure generated in the process of being inserted into 70 is reduced, and there is an effect that damage due to an increase in pressure can be prevented.

    That is, when the plug 90 is inserted into the hole 70, the electrolyte 40 filling the inside of the hole 70 is pushed out in the opposite direction. In this process, since the electrolyte 40 is pushed into the battery or not pushed out of the glass substrate 10, the pressure inside the dye-sensitized solar cell does not change. Further, it prevents air from penetrating into the dye-sensitive solar cell and generating bubbles.

    Further, in the present invention, since the plug 90 that has been press-fitted is inserted so as to be vertically moved if it is the center of the hole 70, the internal pressure acts in the same direction in the vertical direction of the plug 90, and since the directions are opposite, Since it cancels out, it is advantageous to maintain a sealed state.

    On the other hand, since the hole 70 has a simple structure and a sealing process, and the diameter of the hole 70 can be easily increased, the speed of the injection and sealing process of the electrolyte 40 can be improved.

    After the plug 90 is inserted, external cleaning may be performed as necessary, and if there is a protruding portion of the plug 90, the plug 90 may be cut or polished so as to have the same height as the glass substrate 10.

    Further, in order to improve the aesthetic appearance, the plug 90 may be manufactured in the same color as that of the dye-sensitive battery so that the plug 90 does not stand out.

    On the other hand, the plug 90 may be formed of various sizes and shapes using a material having an elastic force, and may be compressed while being in contact with the glass substrate 10 by the elastic force to improve the sealing performance.

    Hereinafter, a description will be given with reference to FIGS.

    5 to 10 are views showing an example in which the outer diameter of the plug according to one embodiment of the present invention is formed larger than the inner diameter of the hole and sealed.

    FIG. 5 shows an example in which a material having an elastic force is used for the plug 90 in order to improve the sealing performance. The plug 90 is made of an elastic material and has a maximum diameter larger than the diameter of the hole 70 and is press-fitted into the hole 70, so that the sealing performance can be improved while the plug 90 is compressed and deformed.

    In this case, in order to adjust the elasticity and deformation rate of the plug 90, the plug 90 may include an insertion hole 92 that is formed through the center in the press-fitting direction, and the insertion portion 110 may be inserted into the insertion hole 91. This will be described with reference to FIGS.

    6 to 9 show the plug 90 modified in such a manner that the plug 90 can be inserted into the hole 70.

    As shown in FIG. 6, the end of the plug 90 is formed in a round shape, or as shown in FIG. 7, the end of the plug 90 is formed in a taper shape, or as shown in FIG. The plug 90 may be formed in a spherical shape.

    Further, as shown in FIG. 9, the hole 70 may be formed in a tapered shape, and the plug 90 may be formed in a tapered shape so as to correspond to the hole 70.

    Furthermore, as shown in FIG. 10, a hollow portion 91 penetrating in the insertion direction may be formed in the center of the plug 90.

    Further, as shown in FIGS. 5 to 10, after the plug 90 is formed of a material having elasticity and press-fitted into the hole 70, the sealing performance is improved by additionally sealing with the bag material 100. Can be made.

    11 to 12 are views showing an example in which a bag material according to an embodiment of the present invention is used and hermetically sealed, and the bag material 100 may be an adhesive such as an epoxy that cures at room temperature. It may be a high temperature fusing material such as a frit or metal solder.

    After the plug 90 is inserted and before the bag material 100 is added, the inside of the hole 70 and the surface of the glass substrate 10 are washed with a solvent or the like, so that the sealing performance and durability can be improved.

    In particular, as shown in FIG. 12, when the hole 70 is inserted into the hollow portion 91 and then sealed with the bag material 100, the bag material 100 is embedded in the hollow portion 91 and the upper and lower spaces of the plug 90 to be integrated. In addition, the sealing performance can be additionally improved while being cured.

    On the other hand, even if the plug 90 is used as a material having high elastic force, if the outer diameter of the plug 90 is larger than the inner diameter of the hole 70, it may be difficult to press-fit into the hole 70.

    Therefore, sealing is described when the outer shape of the plug 90 is the same as or smaller than the inner diameter of the hole 70.

    13 to 22 are views showing an example in which a plug according to an embodiment of the present invention is sealed while being compressed and deformed on a glass substrate.

    Referring to FIG. 13, the outer diameter of the plug 90 is the same as or smaller than the inner diameter of the hole 70 as shown in FIG. 13A, and an insertion hole 92 for inserting the insertion portion 110 is formed at the center thereof. Is done.

    When the insertion portion 110 larger than the inner diameter of the insertion hole 92 is inserted here as shown in FIG. 13B, the outer shape of the plug 90 is expanded in the lateral direction as indicated by the arrow.

    That is, since the plug 90 has elasticity, when the insertion portion 110 is inserted into the insertion hole 92 as shown in FIG. 14 a), the plug 90 is inserted as shown in FIG. 14 b). The sealing performance can be improved by being compressed and deformed while being in contact with the side surface of the hole 70 formed in the glass substrate 10 by being expanded in the lateral direction.

    The insertion part 110 is formed of a material having high hardness and strength so that it can be easily inserted into the insertion hole 92 of the plug 90 having elasticity.

    The insertion portion 110 has a round end or a tapered shape so that the insertion portion 110 can be easily inserted into the insertion hole 92.

    Since the insertion portion 110 is not in direct contact with the positive electrode transparent electrode, the negative electrode transparent electrode, and the electrolyte 40 inside the glass substrate 10, a conductive material such as metal may be used.

    13 to 14 exemplify the case where the insertion portion 110 is inserted into the insertion hole 92 and the diameter of the plug 90 expands, but the diameter may be expanded by being compressed in the insertion direction.

    Referring to FIG. 15, when the plug 90 is formed of an elastic material and compressed in the press-fitting direction, the plug 90 is deformed in a direction perpendicular to the press-fitting direction, and the height is reduced and the diameter is increased as indicated by the arrow. .

    FIGS. 16 and 17 are diagrams showing an example in which the plug 90 is locked in a state in which the diameter of the plug 90 is increased by compressing the plug 90 in the press-fitting direction, as shown in FIG.

    The plug 90 has a diameter that is the same as or smaller than the inner diameter of the hole 70, and an insertion hole 92 that is vertically penetrated is formed in the center of the plug 90. Here, a locking function can be additionally implemented while compressing in the vertical direction.

    Therefore, the locking unit 130 further includes a retainer 133 in which a head 132 is formed on one side of the pin 131 and a pin through hole 134 is formed.

    If the pin 131 is inserted into the insertion hole 92 of the plug 90 so as to pass through the pin through hole 134 of the retainer 133 and the retainer 133 is compressed in the press-fitting direction, the plug 90 is compressed by the head 132 and the retainer 133. The diameter increases and is compressed by the glass substrate 10 to seal the hole 70.

    At this time, as shown in FIG. 16, the diameter of the retainer 133 may be larger than the inner diameter of the hole 70 to enclose the hole 70.

    In addition, as shown in FIG. 17, the diameters of the head 132 and the retainer 133 may be smaller than the inner diameter of the hole 70 and may be embedded in the hole 70.

    At this time, in order to improve the sealing performance, the bag material 100 may be additionally applied to a portion where the head 132 and the retainer 133 are in contact with the glass substrate 10.

    In order to improve the sealing performance, a space in which the head 132 of the pin 131 and the retainer 133 are embedded in the hole 70 may be filled with the bag material 100.

    Further, in order to improve the locking function of the locking portion 130, the retainer 133 is formed with a blade-shaped protrusion 135 protruding in one direction around the pin through hole 134 in the central portion as shown in FIGS. Is done.

    In this case, if the pin 131 is inserted into the pin through-hole 134 as shown in FIG. 20, it is possible to prevent the pin 131 from being caught by the protrusion 135 and sliding out.

    Further, as shown in FIG. 21, a screw hole 136 is formed so that the retainer 133 functions as a female screw, and a screw thread 137 is formed on the outer peripheral surface of the pin 131. As shown in FIG. Allow them to be combined.

    Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely an example, and various modifications and changes will be made by those having ordinary knowledge in the technical field to which the technology pertains. It should be understood that other equivalent embodiments are possible. Accordingly, the true technical protection scope of the present invention should be determined by the following claims.

DESCRIPTION OF SYMBOLS 10: Glass substrate 11: Positive electrode glass substrate 12: Negative electrode glass substrate 40: Electrolyte 50: Sealing material 70: Hole 90: Plug 91: Hollow part 92: Insertion hole 100: Bag material 110: Insertion part 130: Locking part 131: Pin 132: Head 133: Retainer 134: Pin through hole 135: Projection 136: Screw hole 137: Screw thread

Claims (8)

A glass substrate having a hole for injecting electrolyte or discharging air;
A dye-sensitized solar cell, comprising: a plug that is press-fitted into the hole to seal the hole.     2. The dye-sensitive solar cell according to claim 1, wherein the hole is formed so as to penetrate the glass substrate, and the plug is inserted so as to be vertically symmetrical from the center of the hole.     The dye-sensitive solar cell according to claim 1, wherein the plug has an elastic force.     The dye-sensitized solar cell according to claim 3, wherein the plug has a spherical shape or a tapered shape, or has a round end or a tapered end.     2. The dye-sensitized solar cell according to claim 1, wherein the plug includes a hollow portion formed so as to penetrate in the press-fitting direction.     4. The dye-sensitive solar cell according to claim 3, wherein the plug includes an insertion hole formed through the plug in a press-fitting direction, and the insertion portion is inserted into the insertion hole.     The dye-sensitive solar cell according to claim 6, further comprising a locking portion that locks the plug while applying pressure in a vertical direction. The locking part is
A pin inserted into the insertion hole;
A head formed on one side of the pin for compressing the plug;
The dye-sensitive solar cell according to claim 7, further comprising a retainer that compresses the plug while the pin passes through the pin through-hole through which the pin penetrates.

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