KR101550971B1

KR101550971B1 - A method for sealing dye-sensitized solar cells

Info

Publication number: KR101550971B1
Application number: KR1020130112874A
Authority: KR
Inventors: 송인우; 김상학; 장용준; 김솔
Original assignee: 현대자동차주식회사
Priority date: 2013-09-23
Filing date: 2013-09-23
Publication date: 2015-09-07
Also published as: KR20150033199A

Abstract

The present invention relates to a dye-sensitized solar cell having a structure in which the outer periphery of a dye-sensitized solar cell is formed with a concave-convex structure and is bonded by applying a resin, thereby preventing leakage of electrolyte and preventing external moisture penetration, thereby preventing performance deterioration of the dye- have. In addition, it is easy to control the interval between the upper and lower plates (two electrodes) according to the printing height of the support of the concavo-convex structure.

Description

[0001] The present invention relates to a dye-sensitized solar cell,

The present invention relates to a method of sealing the outer rim of a dye-sensitized solar cell.

The conventional method which is widely used as a method of sealing a dye-sensitized solar cell is to use a polymer film. The two substrates (electrodes) are joined together by a heat fusion method using a polymer film, and the bonding process is as follows.

First, the film is manually cut to a desired size in consideration of the space in which the electrolyte containing the photoelectrode is to be injected. Thereafter, the substrate is placed between two substrates and heated to a temperature of about 80 ° C to 130 ° C for contact. This shows a low process efficiency because it includes a manual cutting operation, and it is disadvantageous in that efficiency is further deteriorated when manufacturing a large-sized module. In addition, since the spreadability of the polymer film varies depending on the bonding pressure, it is difficult to control the gap between the two substrates. In addition, when electrolyte is injected to fabricate a dye-sensitized solar cell, electrolyte leakage (the most serious problem in a dye-sensitized solar cell) and moisture penetration occur over a long period of time. In addition to the polymer film, glass frit and UV curing agent may be used to seal the film, but the above problems have not been solved.

Korean Patent Publication No. 10-2010-0117459,

Disclosed is a dye-sensitized solar cell having a barrier rib composed of a plurality of resin layers. The dye-sensitized solar cell according to the present invention includes a semiconductor electrode, an opposite electrode, and an electrolyte solution interposed therebetween; A barrier rib composed of a plurality of resin layers is formed between the semiconductor electrode and the counter electrode so as to seal the electrolyte solution between the semiconductor electrode and the counter electrode. See the following figure.

The present invention relates to a semiconductor device and a method of manufacturing the same, and more particularly, to a semiconductor device comprising a semiconductor substrate, 40: 2, ..., 40-N: multiple resin layers, 100: dye-sensitized solar cell)

However, the above-described barrier ribs fundamentally contain the problem of the adhesion of the barrier rib itself, and there is a limit in blocking electrolyte leakage.

Korean Patent Laid-Open No. 10-2009-0100649,

A dye-sensitized solar cell comprising a first electrode made of a transparent plate having a porous film containing a dye on one side thereof and a second electrode arranged opposite to the first electrode, wherein the dye-sensitized solar cell comprises an electrolyte between the electrodes,

Wherein the electrolyte is filled in a space formed by the glass frit sintered body which is hermetically sealed at a predetermined interval between the first electrode and the second electrode,

The glass frit calcining body comprises 0 to 30 mol% of P ₂ O ₅ ; 0 to 50 mol% of V ₂ O ₅ ; 0 to 20 mol% of ZnO; BaO 0 to 15 mol%; 0 to 20 mol% As ₂ O ₃ ; 0 to 20 mol% of Sb ₂ O ₃ ; 0 to 5 mol% of In ₂ O ₃ ; 0 to 10 mol% Fe ₂ O ₃ ; 0 to 5 mol% of Al ₂ O ₃ ; 0 to 20 mol% of B ₂ O ₃ ; 0 to 10 mol% of Bi ₂ O ₃ ; And 0 to 10 mol% of TiO ₂ are applied and fired to produce a dye-sensitized solar cell. See the following figure.

13: Porous film (including dye), 15: Conductive film (first electrode side), 16: Bulk layer, 20: Second electrode (first electrode) (Electrolyte) inlet, 26: (second electrode side) conductive film, 30: electrolyte, 40: (inter-electrode) glass frit sintered body , 50: (injection port) glass frit sintered body, 60: connecting line, 70: glass frit sintered body (for connecting wires)

However, it is difficult to fundamentally solve the problem presented above.

In the dye-sensitized solar cell, an electrolyte is injected between the two electrodes. In this case, depending on the surrounding environment, electrolyte leakage or moisture penetration may lead to deterioration of the performance and lifetime of the solar cell, and ultimately, There is a fatal problem of losing character. Accordingly, it is an object of the present invention to provide a sealing method for sealing a dye-sensitized solar cell most effectively to prevent electrolyte leakage and moisture penetration.

According to the present invention,

Printing a first support on a first sealing region of a first substrate in a first substrate and a second substrate opposite to each other to form a photoelectric region; Printing a second support on a second sealing area on the second substrate with a width of 1 um to 5 mm wider than the first support; Applying a thermosetting resin, a thermoplastic resin or an ultraviolet ray curable resin to a support on the first substrate, the second substrate, or the second and second substrates; Attaching a first substrate and a second substrate to each other; Heating the thermosetting resin or the thermoplastic resin at a hardening or firing temperature; The ultraviolet ray curable resin is provided with a method of sealing a dye-sensitized solar cell by irradiating ultraviolet rays (photo-curing) or irradiating ultraviolet rays and applying heat (photo-curing + heat curing).

The present invention relates to a dye-sensitized solar cell having a structure in which the outer periphery of a dye-sensitized solar cell is formed by a concave-convex structure and is bonded by applying a resin, thereby preventing leakage of electrolyte and preventing penetration of moisture outside the dye- sensitized solar cell, have. In addition, it is easy to control the interval between the upper and lower plates (two electrodes) according to the printing height of the support of the concavo-convex structure.

1 shows the principle of the dye-sensitized solar cell sealing method of the present invention.

The present invention relates to a method of sealing a dye-sensitized solar cell module.

In the present invention, the substrate refers to a glass, a film, or a plastic coated with a conductive film.

In the present invention, the support refers to controlling the distance between the upper and lower substrates and blocking the inside and the outside of the solar cell.

In the present invention, printing includes both screen printing, dispensing, and inkjet methods, and means that a pattern having a predetermined pattern is applied on a substrate.

According to the present invention,

Printing a first support on a first sealing region of a first substrate in a first substrate and a second substrate opposite to each other to form a photoelectric region; Printing a second support on a second sealing region on a second substrate within a width of 1 um to 5 mm wider than the first support; Applying a thermosetting resin, a thermoplastic resin or an ultraviolet ray curable resin to a support on the first substrate, the second substrate, or the second and second substrates; Attaching a first substrate and a second substrate to each other; Heating the thermosetting resin or the thermoplastic resin at a hardening or firing temperature; The ultraviolet ray curable resin is provided with a method of sealing a dye-sensitized solar cell by irradiating ultraviolet rays (photo-curing) or irradiating ultraviolet rays and applying heat (photo-curing + heat curing).

Further, according to the present invention,

Printing a first support on a first sealing region of a first substrate in a first substrate and a second substrate opposite to each other to form a photoelectric region; Printing a second support on a second sealing region on a second substrate within a width of 1 um to 5 mm wider than the first support; Printing a third support on a third sealing area on the first substrate within a width of 1 um to 5 mm wider than the second support; Applying a thermosetting resin, a thermoplastic resin or an ultraviolet ray curable resin to a support on the first substrate, the second substrate, or the second and second substrates; Attaching a first substrate and a second substrate to each other; Heating the thermosetting resin or the thermoplastic resin at a hardening or firing temperature; The present invention provides a method of sealing a dye-sensitized solar cell by irradiating (curing) ultraviolet rays in a curing region or irradiating ultraviolet rays (heat curing + thermosetting) to the ultraviolet curing resin.

The support is printed on the first and second substrates with a gap therebetween to form a zigzag support, and a resin is applied as another bonding body therebetween to seal the first and second substrates. The support is printed on both the first and second substrates so that a total of two supports will be zigzag, and three or more supports will have a concave and convex structure. Although a structure having two or more supports is possible, three or more supports having a concave-convex structure are most preferable. In addition, a polymeric resin such as a UV curing agent and a thermosetting agent is applied to the entire zigzag structure or the concavo-convex structure, so that the resin and the support are alternately present in the module outer structure.

The support is resistant to electrolyte and may be selected from the group consisting of inorganic oxides or polymers.

As the material that can be used as the support, the first and second substrates can be kept at the opposite intervals and the substrate surface can be adhered to the substrate. However, the glass frit material to which the inorganic oxide is added is most suitable. In particular, vanadium-based glass frit having excellent chemical resistance to iodine which is an electrolyte type of dye-sensitized solar cell is most suitable.

The thermosetting resin, the thermoplastic resin, and the UV curing agent are both applicable. The thermosetting resin may be selected from the group consisting of polymers, the thermoplastic resin may be selected from the group consisting of polymers, and the ultraviolet curing resin may be selected from the group consisting of polymers.

The spacing between supports after the first and second substrates are bonded includes 1 um to 5 mm. The width of each support includes both 10 μm to 10 mm. The width of the support to be printed on the upper plate and the lower plate may not be the same. Unlike the structure in which one sealing agent is sealed, two or more sealing agents are sealed, and sealing properties (electrolytic leakage and moisture penetration) are excellent. In addition, it is possible to autonomously control the interval (electrode interval) There is also.

The printing method of the support and the resin is not limited to any one, but a screen printing or dispenser method is most suitable.

Example

A concave-convex structure having three supports among the preferable structures was manufactured and tested. The prepared sample was tested with a size of 100 mm x 200 mm. The vanadium-based glass frit used as a support was printed on the first and second substrates at a height of 50 to 60 탆 by using a screen printing method. The first and second substrates were coated with a UV curing agent used as a bonding material, and the first and second substrates were sealed with each other by UV irradiation. As shown in FIG. 1, it was confirmed that the expected structure was formed by visual observation and optical microscope.

In order to confirm the cross-sectional structure, it was confirmed that the unevenness structure was formed correctly by SEM image analysis as shown in Fig.

Manufacturing example

(IEC 61646 10.19 & 10.13) annealing test (85 ° C. 1000 hr, 10.19) and heat / humidity test (IEC 61646 10.19 & 10.13) after electrolyte injection using the sealed substrate manufactured through the above- Damp heat test; 85 ° C / 85% RH, 1000 hr, 10.13). The results are shown in Table 1.

[Table 1]

According to the embodiment of the present invention, the outer structure of the dye-sensitized solar cell is constituted by a concavo-convex structure and bonded by applying a resin, thereby preventing leakage of the electrolyte and preventing penetration of moisture outside the dye- sensitized solar cell, . In addition, it is easy to control the interval between the upper and lower plates (two electrodes) according to the printing height of the support of the concavo-convex structure.

Claims

Printing a first support on a first sealing region of a first substrate in a first substrate and a second substrate opposite to each other to form a photoelectric region; Printing a second support on a second sealing area on a second substrate within a width of 1 um to 5 mm wider than the first support, wherein the first and second supports are each a vanadium-based glass frit; Applying a thermosetting resin, a thermoplastic resin or an ultraviolet ray curable resin to a support on the first substrate, the second substrate, or the second and second substrates; Attaching a first substrate and a second substrate to each other; Heating the thermosetting resin or the thermoplastic resin at a hardening or firing temperature; A method of sealing a dye-sensitized solar cell by irradiating the ultraviolet ray-curable resin with ultraviolet rays.

Printing a first support on a first sealing region of a first substrate in a first substrate and a second substrate opposite to each other to form a photoelectric region; Printing a second support on a second sealing region on a second substrate within a width of 1 um to 5 mm wider than the first support; Printing a third support on a third sealing area on the first substrate within a width of 1 um to 5 mm wider than the second support, wherein the first, second, and third supports are each a vanadium-based glass frit; Applying a thermosetting resin, a thermoplastic resin or an ultraviolet ray curable resin to a support on the first substrate, the second substrate, or the second and second substrates; Attaching a first substrate and a second substrate to each other; Heating the thermosetting resin or the thermoplastic resin at a hardening or firing temperature; A method of sealing a dye-sensitized solar cell by irradiating ultraviolet rays in a curing region to the ultraviolet curable resin.

delete

3. The method of claim 1 or 2, wherein the printing comprises both a screen printing, a dispensing, and an inkjet method.

The method according to claim 1 or 2, wherein the thermosetting resin is selected from the group consisting of polymers.

The method according to claim 1 or 2, wherein the thermoplastic resin is selected from the group consisting of polymers.

The method according to claim 1 or 2, wherein the ultraviolet-curing resin is selected from the group consisting of polymers.

3. The method of claim 1 or 2, wherein the support has a height of 20 [mu] m to 1 mm.