KR20150068090A

KR20150068090A - Dye-sensitized solar cell

Info

Publication number: KR20150068090A
Application number: KR1020130153883A
Authority: KR
Inventors: 이양석
Original assignee: 주식회사 오리온
Priority date: 2013-12-11
Filing date: 2013-12-11
Publication date: 2015-06-19

Abstract

According to the present invention, the grooves are formed at the end portions of the upper transparent substrate and the lower transparent substrate, the sealing material is prevented from being separated by positioning the sealing material in the corresponding grooves, and the contact area of the sealing material is increased, Sensitive dye-sensitized solar cell according to the present invention comprises an upper transparent substrate and a lower transparent substrate which are bonded together via an encapsulating material, and a lower transparent substrate, which is provided on the upper and lower ends of the upper transparent substrate, And a groove portion of a lower transparent substrate formed at a position corresponding to the groove portion of the upper transparent substrate, and an encapsulating material is provided on the groove portion of the upper transparent substrate and the lower transparent substrate.

Description

Dye-sensitized solar cell [0002]

[0001] The present invention relates to a dye-sensitized solar cell, and more particularly, to a dye-sensitized solar cell in which grooves are formed at ends of an upper transparent substrate and a lower transparent substrate, To a dye-sensitized solar cell capable of increasing the contact area of the ashes and ultimately improving the adhesion characteristics of the sealing material.

Since the development of dye-sensitized nanoparticle titanium dioxide solar cells by Michael Gratzel of the Lausanne Institute of Technology (EPFL) in Switzerland in 1991, much research has been done in this area. A dye-sensitized solar cell is a device that applies the principle of photosynthesis of a plant. It is a case where a dye having a function of absorbing light energy from a chloroplast is combined with a polymer and applied to a solar cell. The dye-sensitized solar cell is based on a dye polymer for solar absorption, a semiconductor oxide serving as an n-type semiconductor, an electrolyte acting as a p-type semiconductor, a counter electrode for a catalyst, and a transparent electrode for solar transmission.

The basic structure of the dye-sensitized solar cell has a sandwich structure of the transparent substrates 110 and 120 as shown in FIG. 1 (Korean Published Unexamined Patent Application No. 1363578). The inside of the cell includes transparent electrodes 111 and 121 coated on a transparent substrate, porous TiO ₂ 131 made of nanoparticles adhered thereon, a dye polymer 132 coated on the surface of the TiO ₂ particle with a monolayer, An electrolyte solution 150 for oxidation / reduction filling a space between the electrodes, and a counter electrode 140 for electrolyte reduction. The upper and lower transparent substrates 110 and 120 are sealed by the encapsulant 150 and the encapsulant 150 protects the internal structures from the external environment.

The structure shown in FIG. 1 can be referred to as a cell, and recently, a large-capacity dye-sensitized solar cell having a plurality of cells connected in series has been proposed. In the case of a series dye-sensitized solar cell, in addition to the counter electrode, a grid electrode for inter-cell connection is required. In this case, the sealing material is also provided around the grid electrode to prevent contact with the electrolyte.

Meanwhile, the encapsulant plays the role of protecting the internal structures from the external environment or cutting off the contact of the grid electrode with the electrolyte. However, since the upper and lower transparent substrates are both flat glass surfaces, there is a possibility that the contact failure between the transparent substrate and the encapsulant may occur And the electrolyte may leak.

Korean Laid-Open Patent Publication No. 2012-136578

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a semiconductor device, in which grooves are formed in end portions of an upper transparent substrate and a lower transparent substrate, And to provide a dye-sensitized solar cell capable of increasing the contact area and ultimately improving the adhesion characteristics of the sealing material.

According to an aspect of the present invention, there is provided a dye-sensitized solar cell comprising an upper transparent substrate and a lower transparent substrate which are bonded together through an encapsulant, a groove portion provided at an upper end portion and a lower end portion of the upper transparent substrate, And a groove portion of a lower transparent substrate formed at a position corresponding to the groove portion of the substrate, and an encapsulating material is provided on the groove portions of the upper transparent substrate and the lower transparent substrate.

The width of the upper transparent substrate is smaller than the width of the lower transparent substrate, and the groove portion of the upper transparent substrate overlaps the groove portion of the lower transparent substrate.

The upper transparent substrate and the lower transparent substrate are divided into an encapsulant region provided with an encapsulant and an active region provided with an electrolyte and a grid electrode, and a groove portion is formed on the upper transparent substrate and the lower transparent substrate in the encapsulant region do.

The dye-sensitized solar cell according to the present invention has the following effects.

By providing the groove portion on the substrate at the position where the sealing material or the final sealing material is provided, the possibility of leakage of the electrolyte to the outside can be minimized.

1 is a cross-sectional view of a conventional dye-sensitized solar cell.
2 is a cross-sectional view of a dye-sensitized solar cell according to an embodiment of the present invention.
3 is a cross-sectional view of a dye-sensitized solar cell according to another embodiment of the present invention.
4 is a cross-sectional view of a dye-sensitized solar cell according to another embodiment of the present invention.

Hereinafter, a dye-sensitized solar cell according to an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 2, the dye-sensitized solar cell according to an embodiment of the present invention includes an upper transparent substrate 210 and a lower transparent substrate 220 which are bonded together through an encapsulant 230.

The encapsulant 230 joins the upper transparent substrate 210 and the lower transparent substrate 220 together and prevents the electrolyte contained in the solar cell from leaking to the outside. The sealing material 230 is provided at positions corresponding to the upper transparent substrate 210 and the lower transparent substrate 220. When the upper transparent substrate 210 and the lower transparent substrate 220 are attached together, The ashes 230 are also joined together to form an integral encapsulant 230.

A counter electrode, a light absorbing layer, a grid electrode, and the like are provided between the upper transparent substrate 210 and the lower transparent substrate 220 in addition to the above-described electrolyte (not shown). In the following description, a region where the counter electrode, the light absorbing layer, the grid electrode and the electrolyte are provided is referred to as an active area A, and the sealing material 230 is provided in an area other than the active area A. .

The present invention is characterized in that the grooves 211 and 221 are formed in the upper transparent substrate 210 and the lower transparent substrate 220 in the region where the encapsulant 230 is provided and the encapsulant 230 to prevent the sealing material 230 from flowing out when the upper transparent substrate 210 and the lower transparent substrate 220 are attached together and to increase the contact area of the sealing material 230 to improve the adhesion characteristics .

The grooves 211 and 221 may be provided in all areas where the sealing material 230 is provided (see FIG. 2) or may be provided in some areas (see FIG. 3). That is, the grooves 211 and 221 may be formed on the upper transparent substrate 210 and the lower transparent substrate 220 in the region where the encapsulant 230 is provided, or may be formed on the upper transparent substrate 210 and lower And may be formed on the transparent substrate 220. In the dye-sensitized solar cell, the electrolyte is usually injected through the upper and lower ends of the solar cell. After the completion of the electrolyte injection, the final sealing material is coated on the upper and lower ends of the solar cell to seal the electrolyte injection port. 3, when the grooves 211 and 221 are formed in a part of the sealing material 230, the upper and lower ends of the solar cell, that is, the upper and lower transparent substrates 210 and 220 The upper and lower ends of the frame.

As shown in FIG. 4, in order to improve the sealing effect in forming the grooves 211 and 221 at the upper and lower ends of the upper and lower transparent substrates 210 and 220, The width of the lower transparent substrate 220 can be reduced. The grooves 211 and 221 formed at the upper and lower ends of the upper transparent substrate 210 should be designed to overlap with the grooves 211 and 221 of the lower transparent substrate 220.

210: upper transparent substrate 211, 221:
220: lower transparent substrate 230: sealing material
A: active area

Claims

An upper transparent substrate and a lower transparent substrate which are bonded together through an encapsulating material;
A groove portion provided at an upper end portion and a lower end portion of the upper transparent substrate, respectively; And
And a groove portion of a lower transparent substrate formed at a position corresponding to the groove portion of the upper transparent substrate,
And an encapsulating material is provided on the grooves of the upper transparent substrate and the lower transparent substrate.

The method of claim 1, wherein the width of the upper transparent substrate is smaller than the width of the lower transparent substrate,
Wherein the groove portion of the upper transparent substrate and the groove portion of the lower transparent substrate overlap each other.

The method of claim 1, wherein the upper transparent substrate and the lower transparent substrate are divided into an encapsulant region having an encapsulating material and an active region having an electrolyte and a grid electrode,
And a groove is formed on the upper transparent substrate and the lower transparent substrate of the encapsulation material region.