WO2012157842A1 - Dye-sensitized solar cell having improved efficiency by using back surface coloring, and window including having same - Google Patents

Dye-sensitized solar cell having improved efficiency by using back surface coloring, and window including having same Download PDF

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Publication number
WO2012157842A1
WO2012157842A1 PCT/KR2012/002002 KR2012002002W WO2012157842A1 WO 2012157842 A1 WO2012157842 A1 WO 2012157842A1 KR 2012002002 W KR2012002002 W KR 2012002002W WO 2012157842 A1 WO2012157842 A1 WO 2012157842A1
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Prior art keywords
dye
sensitized solar
solar cell
coating layer
present
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PCT/KR2012/002002
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French (fr)
Korean (ko)
Inventor
구본근
김도헌
이찬종
정성훈
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주식회사 이건창호
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Priority claimed from KR1020120027266A external-priority patent/KR20120128089A/en
Application filed by 주식회사 이건창호 filed Critical 주식회사 이건창호
Publication of WO2012157842A1 publication Critical patent/WO2012157842A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2068—Panels or arrays of photoelectrochemical cells, e.g. photovoltaic modules based on photoelectrochemical cells
    • H01G9/2081—Serial interconnection of cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2068—Panels or arrays of photoelectrochemical cells, e.g. photovoltaic modules based on photoelectrochemical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
    • H01G9/2031—Light-sensitive devices comprising an oxide semiconductor electrode comprising titanium oxide, e.g. TiO2
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2059—Light-sensitive devices comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/542—Dye sensitized solar cells

Definitions

  • the present invention relates to a dye-sensitized solar cell having improved efficiency by using a backside coloring and a window comprising the same, and more particularly, by applying a white coating layer on the back side of a substrate, and then implementing various colors on the white coating layer.
  • the present invention relates to a dye-sensitized solar cell having improved efficiency using backside coloring, which enhances aesthetics and at the same time improves efficiency by backscattering the light irradiated onto the front surface by a colored layer, and a window including the same.
  • a typical dye-sensitized solar cell is a dye-sensitized solar cell using nanoparticle titanium oxide, which was developed by Michael Gratzel of the Swiss National Lausanne Institute of Technology in 1991.
  • This dye-sensitized solar cell has the advantage that the manufacturing cost is cheaper than the conventional silicon solar cell, and the electrode is transparent, so that it can be applied to a glass wall or a glass greenhouse of a building, but the photoelectric conversion efficiency is low, and thus the practical application is limited.
  • the dye-sensitized solar cell is composed of a transparent conductive electrode coated with a nanocrystalline oxide film on which dye molecules are adsorbed, a counter electrode coated with metal platinum, and an electrolyte that functions as a redox.
  • the dye-sensitized solar cell having such a configuration is used by having one dye-sensitized solar cell on one substrate, or by connecting a plurality of dye-sensitized solar cells on one substrate to be used as a module.
  • the dye-sensitized solar cell module in which a plurality of such dye-sensitized solar cells are connected and installed is mainly applied to the field of building integrated photovoltaic (BIPV).
  • 1 and 2 are a front view and a cross-sectional view of a dye-sensitized solar cell according to the prior art.
  • the dye-sensitized solar cell module has a sandwich structure in which the first substrate 2 and the second substrate 4 are bonded to each other as two plate-shaped transparent electrodes, and is discretized on the rear surface of the first substrate 2 as one transparent electrode.
  • a plurality of unit cells are formed in which the electrolyte 18 is filled in the space between the first substrate 2 and the second substrate 4 provided with the second electrode 8, respectively.
  • the cells are connected to each other by the metal grid 10 and are installed.
  • the outside of the grid 10 is wrapped with a sealing member 14 to prevent contact with the electrolyte 18, and the entire dye-sensitized solar cell module
  • the wall surface of the dye-sensitized solar cell positioned outside of the dye-sensitized solar cell is closed with the sealing member 14 to prevent the electrolyte 18 from leaking to the outside.
  • the etching unit 16 is provided on the conductive film 22 coated on the surface of the substrates 2 and 4 adjacent to the grid 10 provided between the dye-sensitized solar cells, thereby providing the inside of the dye-sensitized solar cell.
  • the metal grid 10 is a boundary surface of a cell which is a dye-sensitized solar cell, and is connected to extend from one side wall of the cell to the other side wall opposite to the cell, that is, an electrolyte filled in a cell, that is, a dye-sensitized solar cell ( 18) is prevented from being transferred to other dye-sensitized solar cells. Therefore, in order to inject the electrolyte 18 into each of the dye-sensitized solar cells, two electrolyte injection holes 12 are provided for each dye-sensitized solar cell.
  • the dye-sensitized solar cell of the above-described structure is provided in a building window or the like, and converts light emitted to the outside into electricity.
  • dyes that become colored in dye-sensitized solar cells generally exhibit a red color, the most common of which is a dye called N719.
  • the dye-sensitized solar cell manufactured using the red dye as described above is reddish brown, and thus, when the dye-sensitized solar cell is used in a building window or the like, the light transmitted therethrough also has a reddish color. Therefore, the user may feel more fatigue in the red-based light compared to the blue-based light and there is a problem that the color of the dye is the same on both the front and the back of the battery.
  • an object of the present invention is to provide a dye-sensitized solar cell and a window including the same, which can implement various colors and have excellent efficiency.
  • the present invention is a dye-sensitized solar cell in which two substrates are spaced apart at predetermined intervals to face each other, and an electrolyte is filled between the upper substrate and the lower substrate, and on the outer side of any one of the substrates.
  • a first coating layer comprising a curable material; And it provides a dye-sensitized solar cell, the efficiency is improved by using the back coloring, characterized in that it comprises a coating layer applied on the first coating layer.
  • the first coating layer has a white color
  • the coating layer includes the same curable material as the first coating layer.
  • the curable material is a UV curable material
  • the first coating layer and the coating layer are simultaneously cured by UV irradiation once after application.
  • the first coating layer has a thickness of 10 to 100 ⁇ m.
  • the present invention also provides a window comprising the dye-sensitized solar cell described above.
  • a white coating layer is coated on the back of the substrate, and a coating of various colors may be applied to the coating layer.
  • the aesthetics are not only enhanced through the back coloring, but the present invention can increase the efficiency of the battery by back scattering of light, as compared with the prior art in which the light irradiated from the front penetrates the back of the substrate. Can be.
  • 1 and 2 are a front view and a cross-sectional view of a dye-sensitized solar cell according to the prior art.
  • FIG 3 is a cross-sectional view of a dye-sensitized solar cell according to an embodiment of the present invention.
  • 4 and 5 are front and rear photographs of the dye-sensitized solar cell according to the embodiment of the present invention, respectively.
  • the dye-sensitized solar cell according to the present invention is capable of realizing various colors in a dye-sensitized solar cell by applying a white layer on one surface of a transparent substrate such as glass and coating a variety of colors on the white layer.
  • FIG 3 is a cross-sectional view of a dye-sensitized solar cell according to an embodiment of the present invention.
  • the dye-sensitized solar cell according to the present invention has a structure in which upper and lower substrates 331 and 331 are spaced at predetermined intervals, and an electrolyte 330 is filled in the upper and lower substrates 331 and 332. . That is, the dye-sensitized solar cell according to the present invention is adsorbed on two electrodes (semiconductor and counter electrode) facing each other on a transparent substrate such as glass, a TiO 2 layer laminated on a semiconductor electrode, and the TiO 2 layer. It has a structure consisting of a dye and an electrolyte layer filling the electrode, which is the same as the conventional dye-sensitized solar cell structure described in FIGS.
  • the dye-sensitized solar cell according to the present invention is provided with a separate first coating layer 310 on the outer side of either the upper or lower substrate.
  • the first coating layer is preferably white because the first coating layer is not only used as a base layer coated with various colors of paint, but also performs a function of reversely scattering transmitted light.
  • the first coating layer 310 is a curable material, it is preferable that the material is cured by light such as UV.
  • the thickness of the first coating layer 310 is preferably 10 to 100 ⁇ m, if the thickness of the first coating layer 310 is less than the above range, it is difficult to expect a sufficient backscattering effect, if the above range, There is a problem that the curing time is long due to the excessive thickness.
  • the paint layer 320 is coated on the white first coating layer 310.
  • the paint layer 320 may have a predetermined color, whereby various patterns of colors may be implemented on the first coating layer 310. Dye-sensitized solar cell according to the present invention can expect a double operation effect through the first coating layer and the coating layer applied sequentially.
  • the paint layer 320 of the dye-sensitized solar cell according to the present invention preferably comprises a curable material similar to the first coating layer 310, more preferably the same kind as the first coating layer 310 It is preferable that it is a curable substance of. Accordingly, the dye-sensitized solar cell according to the present invention shortens the process time by sequentially applying the first coating layer 310 and the paint layer 320 and curing them all at once.
  • the cured material is a UV curing agent
  • the coating layer 320 and the first coating layer 310 thereunder is cured by UV irradiation for a very short time (for example within a few seconds) to the back of the substrate Adheres to
  • the present invention minimizes the effect of UV irradiation into the dye-sensitized solar cell through a photocuring method performed in a short time, and also removes the effect of thermal modification due to the thermal curing method.
  • the coating layer is cured by UV irradiation, and thus the influence of the material inside the substrate is not affected.
  • the dye-sensitized solar cell according to the present invention overcomes the limitations of the monotonous pattern of the conventional dye-sensitized solar cell by patterning a variety of colors on the back side of the substrate, and at the same time, the effect of efficiency increase through the coated coating layer and the paint layer on the back side. Achieve at the same time.
  • the first coating layer may function as a functional layer for back scattering of light irradiated with a transparent color.
  • the present invention provides a window, that is, a building integrated solar cell (BIPV) including the dye-sensitized solar cell described above, and in particular, due to the coloring of the rear surface minimizes aesthetics and inconvenience of the user and improves efficiency.
  • BIPV building integrated solar cell
  • the efficiency of the back-coloured dye-sensitized solar cell was measured.
  • a 300 x 300 mm dye-sensitized solar cell unit cell was prepared, wherein the unit cell active area was 539.12 cm 2.
  • the front and rear surfaces of the dye-sensitized solar cell of the embodiment according to the embodiment of the present invention are as shown in FIGS. 4 and 5, respectively.
  • Example 2 As a comparative example, a dye-sensitized solar cell having the same size and active area as in Example 1, in which a coating layer was not laminated on the rear surface, was prepared.
  • the dye-sensitized solar cell of the present invention in which the colored layers of various colors are applied to the back side, all the characteristics are improved.
  • the dye-sensitized solar cell of the present invention which realizes various colors on the white coating layer after applying the white coating layer on the back side of the substrate shows a considerably excellent cell efficiency.
  • Dye-sensitized solar cells according to the present invention have industrial applicability, which can be combined with buildings and the like and used as power generation means.

Abstract

The present invention relates toDisclosed are a dye-sensitized solar cell having improved efficiency by using back surface coloring, and a window including having same. The dye-sensitized solar cell according to the present invention may be a dye-sensitized solar cell in which two boards are spaced a predetermined distance apart from and opposite each other to face each other, and an electrolyte is filled between the said upper and lower boards. The dye-sensitized solar cell includescomprises: a first coating layer including a curable material on the outside of one of the said two boards; and a print paint layer applied on the said first coating layer. In the dye-sensitized solar call according to the present invention, a white coating layer may be applied on a the back surface of one of the boards, and prints paints having various colors may be applied on the said coating layer. ParticularlyIn particular, aesthetics may be improved by using the back surface coloring, and also, the efficiency of the cell may be improved due to back scattering when compared to a conventional technology in which light emitted through a front surface passes as-is through a the back surface of a substrate.

Description

후면 채색을 이용하여 효율이 향상된 염료감응 태양전지 및 이를 포함하는 창호Dye-sensitized solar cell with improved efficiency using backside coloring and windows and the same
본 발명은 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지 및 이를 포함하는 창호에 관한 것으로, 보다 상세하게는 기판의 후면에 백색 코팅층을 도포한 후, 상기 백색 코팅층 상에 다양한 색을 구현함으로써, 심미감을 고취시킴과 동시에 전면에 조사되는 빛이 채색층에 의하여 역산란됨으로써 효율이 향상될 수 있는, 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지 및 이를 포함하는 창호에 관한 것이다. The present invention relates to a dye-sensitized solar cell having improved efficiency by using a backside coloring and a window comprising the same, and more particularly, by applying a white coating layer on the back side of a substrate, and then implementing various colors on the white coating layer. The present invention relates to a dye-sensitized solar cell having improved efficiency using backside coloring, which enhances aesthetics and at the same time improves efficiency by backscattering the light irradiated onto the front surface by a colored layer, and a window including the same.
염료감응 태양전지 중에서 대표적인 것으로는 1991년도 스위스 국립 로잔 고등기술원의 마이클 그라첼(Michael Gratzel) 등이 개발한 나노입자 산화티타늄을 이용한 염료감응 태양전지가 있다. 이 염료감응 태양전지는 기존의 실리콘 태양전지에 비해 제조단가가 저렴하고 전극이 투명하여 건물 외벽 유리창이나 유리온실 등에 응용이 가능하다는 이점이 있으나, 광전변환 효율이 낮아 실제 적용에는 제한이 있다. 이러한 염료감응 태양전지는 염료분자가 흡착된 나노결정 산화물필름이 코팅된 투명의 전도성 전극, 금속 백금 등이 코팅된 상대전극 및 산화-환원의 작용을 하는 전해질로 구성된다. 이와 같은 구성을 갖는 염료감응 태양전지는 하나의 기판에 하나의 염료감응 태양전지를 구비시켜 사용하거나, 하나의 기판 위에 다수개의 염료감응 태양전지를 서로 연결시켜 모듈형태로 사용하게 된다. 이와 같은 종래의 염료감응 태양전지를 다수개 연결설치한 염료감응 태양전지 모듈은 주로 건자재 일체형 광전변환(BIPV,building integrated photovoltaic) 분야에 적용된다. A typical dye-sensitized solar cell is a dye-sensitized solar cell using nanoparticle titanium oxide, which was developed by Michael Gratzel of the Swiss National Lausanne Institute of Technology in 1991. This dye-sensitized solar cell has the advantage that the manufacturing cost is cheaper than the conventional silicon solar cell, and the electrode is transparent, so that it can be applied to a glass wall or a glass greenhouse of a building, but the photoelectric conversion efficiency is low, and thus the practical application is limited. The dye-sensitized solar cell is composed of a transparent conductive electrode coated with a nanocrystalline oxide film on which dye molecules are adsorbed, a counter electrode coated with metal platinum, and an electrolyte that functions as a redox. The dye-sensitized solar cell having such a configuration is used by having one dye-sensitized solar cell on one substrate, or by connecting a plurality of dye-sensitized solar cells on one substrate to be used as a module. The dye-sensitized solar cell module in which a plurality of such dye-sensitized solar cells are connected and installed is mainly applied to the field of building integrated photovoltaic (BIPV).
도 1 및 2는 종래 기술에 따른 염료감응 태양전지의 정면도 및 단면도이다.1 and 2 are a front view and a cross-sectional view of a dye-sensitized solar cell according to the prior art.
도 1 및 2를 참조하면, 대면적 제트-시리즈(Z-series) 형태의 직렬 모듈로 제작되어, 사용된 염료감응 태양전지가 개시된다. 상기 염료감응 태양전지 모듈은 두 개의 판상 투명전극으로서 제 1 기판(2) 및 제 2 기판(4)이 서로 접합된 샌드위치 구조를 갖고, 하나의 투명전극인 제 1 기판(2)의 이면에 이산화티타늄 등으로 구성된 도전성 제 1 전극(6)을 구비하고, 다른 하나의 투명전극인 제 2 기판(4)에 백금 등으로 구성된 상대전극인 제 2 전극(8)을 구비하고, 상기 제 1 전극(6) 및 제 2 전극(8)이 각각 구비된 제 1 기판(2) 및 제 2 기판(4) 사이의 공간에 전해질(18)이 충진된 형태를 하나의 단위 셀(cell)로 하여 다수의 셀을 금속 그리드(10)로 서로 연결 설치하여 구성한다. 이때, 상기 그리드(10)는 통상적으로 전해질(18)에 취약하므로 상기 그리드(10)의 외부를 밀봉부재(14)로 감싸 전해질(18)과 접촉되는 것을 방지하고, 전체 염료감응 태양전지 모듈을 구성하는 염료감응 태양전지 중 외측에 위치하는 염료감응 태양전지의 벽면을 밀봉부재(14)로 마감시켜 전해질(18)이 외부로 누액되는 것을 방지한다. 또한, 상기 각각의 염료감응 태양전지의 사이에 구비되는 그리드(10)와 이웃하게 기판(2, 4) 표면에 코팅된 도전성 필름(22)에 에칭부(16)를 구비시켜 염료감응 태양전지 내부에서 발생하는 전자가 다른 염료감응 태양전지로 병렬로 흐르지 않도록 한다. 한편, 상기 금속 그리드(10)는 염료감응 태양전지인 셀의 경계면으로서, 상기 셀의 일 측 벽면으로부터 이에 대향되는 타 측 벽면까지 연장되도록 연결 설치되어 셀, 즉 염료감응 태양전지에 충진된 전해질(18)이 다른 염료감응 태양전지로 이동되지 못하도록 구성된다. 그러므로 상기 염료감응 태양전지 각각에 전해질(18)을 주입하기 위해서는 해당 염료감응 태양전지마다 전해질 주입구(12)가 별도로 두 개 구비된다. 상술한 구조의 염료감응 태양전지는 건물 창호 등에 구비되어, 실외로 조사되는 빛을 전기로 변환시킨다. 하지만, 염료감응 태양전지에서 색을 띠게 되는 염료는 일반적으로 붉은 색을 나타내며, 이 중 가장 일반적인 염료는 N719로 지칭되는 염료이다. 이와 같이 붉은 색의 염료를 사용하여 제조된 염료감응 태양전지는 적갈색을 나타내며, 따라서, 이와 같은 염료감응 태양전지를 건물 창호 등에 사용하는 경우, 이를 투과한 빛 또한 붉은 계열을 띠게 된다. 따라서, 사용자는 푸름 색 계열의 채광 빛에 비하여 붉은 색 계열의 채광 빛에는 피로감을 더 느끼게 되며, 전지의 전면과 후면 모두 염료의 색이 동일하게 나타난다는 문제가 있다. Referring to FIGS. 1 and 2, a dye-sensitized solar cell manufactured by using a series module of a large area Z-series type is disclosed. The dye-sensitized solar cell module has a sandwich structure in which the first substrate 2 and the second substrate 4 are bonded to each other as two plate-shaped transparent electrodes, and is discretized on the rear surface of the first substrate 2 as one transparent electrode. A conductive first electrode 6 made of titanium or the like, and a second electrode 4 made of platinum or the like on a second substrate 4, which is another transparent electrode, and the first electrode ( 6) A plurality of unit cells are formed in which the electrolyte 18 is filled in the space between the first substrate 2 and the second substrate 4 provided with the second electrode 8, respectively. The cells are connected to each other by the metal grid 10 and are installed. At this time, since the grid 10 is typically vulnerable to the electrolyte 18, the outside of the grid 10 is wrapped with a sealing member 14 to prevent contact with the electrolyte 18, and the entire dye-sensitized solar cell module The wall surface of the dye-sensitized solar cell positioned outside of the dye-sensitized solar cell is closed with the sealing member 14 to prevent the electrolyte 18 from leaking to the outside. In addition, the etching unit 16 is provided on the conductive film 22 coated on the surface of the substrates 2 and 4 adjacent to the grid 10 provided between the dye-sensitized solar cells, thereby providing the inside of the dye-sensitized solar cell. Prevent electrons from flowing in parallel to other dye-sensitized solar cells. Meanwhile, the metal grid 10 is a boundary surface of a cell which is a dye-sensitized solar cell, and is connected to extend from one side wall of the cell to the other side wall opposite to the cell, that is, an electrolyte filled in a cell, that is, a dye-sensitized solar cell ( 18) is prevented from being transferred to other dye-sensitized solar cells. Therefore, in order to inject the electrolyte 18 into each of the dye-sensitized solar cells, two electrolyte injection holes 12 are provided for each dye-sensitized solar cell. The dye-sensitized solar cell of the above-described structure is provided in a building window or the like, and converts light emitted to the outside into electricity. However, dyes that become colored in dye-sensitized solar cells generally exhibit a red color, the most common of which is a dye called N719. The dye-sensitized solar cell manufactured using the red dye as described above is reddish brown, and thus, when the dye-sensitized solar cell is used in a building window or the like, the light transmitted therethrough also has a reddish color. Therefore, the user may feel more fatigue in the red-based light compared to the blue-based light and there is a problem that the color of the dye is the same on both the front and the back of the battery.
따라서, 본 발명이 해결하려는 과제는 다양한 색을 구현할 수 있음과 동시에 우수한 효율을 가지는 염료감응 태양전지 및 이를 포함하는 창호를 제공하는 것이다. Accordingly, an object of the present invention is to provide a dye-sensitized solar cell and a window including the same, which can implement various colors and have excellent efficiency.
상기 과제를 해결하기 위하여, 본 발명은 두 개의 기판이 소정 간격으로 이격되어, 서로 대향하며, 상기 상부 기판 및 하부 기판 사이에 전해질이 충전된 염료감응 태양전지로서, 상기 기판 중 어느 하나의 외측상에는 경화성 물질을 포함하는 제 1 코팅층; 및 상기 제 1 코팅층 상에 도포된 도료층을 포함하는 것을 특징으로 하는, 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지를 제공한다. In order to solve the above problems, the present invention is a dye-sensitized solar cell in which two substrates are spaced apart at predetermined intervals to face each other, and an electrolyte is filled between the upper substrate and the lower substrate, and on the outer side of any one of the substrates. A first coating layer comprising a curable material; And it provides a dye-sensitized solar cell, the efficiency is improved by using the back coloring, characterized in that it comprises a coating layer applied on the first coating layer.
본 발명의 일 실시예에서 상기 제 1 코팅층은 백색을 띠며, 상기 도료층은 상기 제 1 코팅층과 동일한 경화성 물질을 포함한다. In one embodiment of the present invention, the first coating layer has a white color, and the coating layer includes the same curable material as the first coating layer.
본 발명의 일 실시예에서 상기 경화성 물질은 UV 경화성 물질이며, 상기 제 1 코팅층과 도료층은 도포 후 1회 UV 조사에 의하여 동시에 경화된다. 또한, 상기 제 1 코팅층은 10 내지 100 ㎛의 두께이다. In one embodiment of the present invention, the curable material is a UV curable material, and the first coating layer and the coating layer are simultaneously cured by UV irradiation once after application. In addition, the first coating layer has a thickness of 10 to 100 ㎛.
본 발명은 또한 상술한 염료감응 태양전지를 포함하는 창호를 제공한다. The present invention also provides a window comprising the dye-sensitized solar cell described above.
본 발명에 따른 염료감응 태양전지는 기판 후면에 백색 코팅층을 도포하고, 상기 코팅층에 다양한 색상의 도료를 도포할 수 있다. 특히 이러한 후면 채색을 통하여 심미감이 고취될 뿐만 아니라, 전면에서 조사되는 빛이 그대로 기판 후면을 관통하는 종래 기술에 비하여, 본 발명은 빛의 역산란(back scattering)에 의하여 전지의 효율을 증가시킬 수 있다. In the dye-sensitized solar cell according to the present invention, a white coating layer is coated on the back of the substrate, and a coating of various colors may be applied to the coating layer. In particular, the aesthetics are not only enhanced through the back coloring, but the present invention can increase the efficiency of the battery by back scattering of light, as compared with the prior art in which the light irradiated from the front penetrates the back of the substrate. Can be.
도 1 및 2는 종래 기술에 따른 염료감응 태양전지의 정면도 및 단면도이다.1 and 2 are a front view and a cross-sectional view of a dye-sensitized solar cell according to the prior art.
도 3은 본 발명의 일 실시예에 따른 염료감응 태양전지의 단면도이다.3 is a cross-sectional view of a dye-sensitized solar cell according to an embodiment of the present invention.
도 4 및 5는 각각 본 발명의 일 실시예에 따른 염료감응 태양전지의 전면 및 후면 사진이다.4 and 5 are front and rear photographs of the dye-sensitized solar cell according to the embodiment of the present invention, respectively.
도 6은 상기 실시예와 비교예에 따른 염료감응 태양전지의 효율을 비교한 결과이다. 6 is a result of comparing the efficiency of the dye-sensitized solar cell according to the embodiment and the comparative example.
이하, 본 발명을 도면을 참조하여 상세하게 설명하고자 한다. 다음에 소개되는 실시예들은 당업자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 예로서 제공되는 것이다. 따라서 본 발명은 이하 설명된 실시예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 그리고 도면들에 있어서, 구성요소의 폭, 길이, 두께 등은 편의를 위하여 과장되어 표현될 수도 있다. 명세서 전체에 걸쳐서 동일한 참조번호들은 동일한 구성요소들을 나타낸다.Hereinafter, the present invention will be described in detail with reference to the drawings. The following embodiments are provided as examples to ensure that the spirit of the present invention to those skilled in the art will fully convey. Therefore, the present invention is not limited to the embodiments described below and may be embodied in other forms. In the drawings, the width, length, thickness, etc. of the components may be exaggerated for convenience. Like numbers refer to like elements throughout.
본 발명에 따른 염료감응 태양전지는 유리와 같은 투명기판의 일면 상에 백색층을 도포하고, 상기 백색층 상에 다양한 색의 도료를 입힘으로써 염료감응 태양전지에서도 다양한 색의 구현이 가능하다. The dye-sensitized solar cell according to the present invention is capable of realizing various colors in a dye-sensitized solar cell by applying a white layer on one surface of a transparent substrate such as glass and coating a variety of colors on the white layer.
이하 본 발명에 따른 염료감응 태양전지를 보다 상세히 설명한다. Hereinafter, the dye-sensitized solar cell according to the present invention will be described in more detail.
도 3은 본 발명의 일 실시예에 따른 염료감응 태양전지의 단면도이다.3 is a cross-sectional view of a dye-sensitized solar cell according to an embodiment of the present invention.
도 3을 참조하면, 본 발명에 따른 염료감응 태양전지는 상부 및 하부 기판(331, 331)이 소정 간격으로 이격된 구조이며, 상기 상부 및 하부 기판(331, 332)에는 전해질(330)이 채워진다. 즉, 본 발명에 따른 염료감응 태양전지는 유리와 같은 투명 기판상에 서로 대향하는 두 개의 전극(반도체 및 상대 전극), 상기 전극 중 반도체 전극에 적층된 TiO2층, 상기 TiO2층에 흡착된 염료 및 상기 전극을 채우는 전해질층으로 이루어진 구조를 가지며, 이는 도 1 과 2에서 설명된 종래의 염료감응 태양전지 구조와 동일하다. Referring to FIG. 3, the dye-sensitized solar cell according to the present invention has a structure in which upper and lower substrates 331 and 331 are spaced at predetermined intervals, and an electrolyte 330 is filled in the upper and lower substrates 331 and 332. . That is, the dye-sensitized solar cell according to the present invention is adsorbed on two electrodes (semiconductor and counter electrode) facing each other on a transparent substrate such as glass, a TiO 2 layer laminated on a semiconductor electrode, and the TiO 2 layer. It has a structure consisting of a dye and an electrolyte layer filling the electrode, which is the same as the conventional dye-sensitized solar cell structure described in FIGS.
하지만, 본 발명에 따른 염료감응 태양전지는 상부 또는 하부 기판 중 어느 하나의 외측상에 별도의 제 1 코팅층(310)이 구비된다. 상기 제 1 코팅층은 백색을 띠는 것이 바람직한데, 그 이유는 상기 제 1 코팅층은 우선 다양한 색의 도료가 입혀지는 바탕층으로 사용될 뿐만 아니라, 투과되는 빛을 역으로 산란시키는 기능을 수행하기 때문이다. 본 발명의 일 실시예에서 상기 제 1 코팅층(310)은 경화성 물질이며, UV 등과 같은 광에 의하여 경화되는 물질인 것이 바람직하다. 또한, 상기 제 1 코팅층(310)의 두께는 10 내지 100 ㎛인 것이 바람직한데, 만약 제 1 코팅층(310)의 두께가 상기 범위 미만이면, 충분한 역산란 효과를 기대하기 어렵고, 상기 범위 초과이면, 과도한 두께로 인하여 경화시간이 길어지는 문제가 있다. 상기 백색의 제 1 코팅층(310) 상에는 도료층(320)이 도포된다. 상기 도료층(320)은 일정한 색을 띨 수 있는데, 이로써 다양한 패턴의 색상이 상기 제 1 코팅층(310) 상에 구현될 수 있다. 본 발명에 따른 염료감응 태양전지는 순차적으로 도포된 제 1 코팅층 및 도료층을 통한 이중의 연산란 효과를 기대할 수 있다. However, the dye-sensitized solar cell according to the present invention is provided with a separate first coating layer 310 on the outer side of either the upper or lower substrate. The first coating layer is preferably white because the first coating layer is not only used as a base layer coated with various colors of paint, but also performs a function of reversely scattering transmitted light. . In one embodiment of the present invention, the first coating layer 310 is a curable material, it is preferable that the material is cured by light such as UV. In addition, the thickness of the first coating layer 310 is preferably 10 to 100 ㎛, if the thickness of the first coating layer 310 is less than the above range, it is difficult to expect a sufficient backscattering effect, if the above range, There is a problem that the curing time is long due to the excessive thickness. The paint layer 320 is coated on the white first coating layer 310. The paint layer 320 may have a predetermined color, whereby various patterns of colors may be implemented on the first coating layer 310. Dye-sensitized solar cell according to the present invention can expect a double operation effect through the first coating layer and the coating layer applied sequentially.
또한, 본 발명에 따른 염료감응 태양전지의 상기 도료층(320)은 상기 제 1 코팅층(310)과 유사하게 경화성 물질을 포함하는 것이 바람직하며, 보다 바람직하게는 제 1 코팅층(310)과 동일한 종류의 경화성 물질인 것이 바람직하다. 따라서, 본 발명에 따른 염료감응 태양전지는 제 1 코팅층(310)과 도료층(320)을 순차적으로 도포한 후, 이를 한꺼번에 경화시킴으로써 공정 시간을 단축시킨다. In addition, the paint layer 320 of the dye-sensitized solar cell according to the present invention preferably comprises a curable material similar to the first coating layer 310, more preferably the same kind as the first coating layer 310 It is preferable that it is a curable substance of. Accordingly, the dye-sensitized solar cell according to the present invention shortens the process time by sequentially applying the first coating layer 310 and the paint layer 320 and curing them all at once.
본 발명의 일 실시예에서 상기 경화물질은 UV 경화제이며, 도료층(320) 및 그 하부의 제 1 코팅층(310)은 매우 짧은 시간(예를 들면 수초 이내)의 UV 조사에 의하여 경화되어 기판 후면에 점착된다. 특히 본 발명에서는 짧은 시간으로 수행되는 광 경화방식을 통하여 염료감응 태양전지 내부로의 UV 조사에 의한 영향을 최소화하고, 아울러 열 경화 방식에 따른 열 변성 영향을 제거하였다. 특히 일반적인 염료감응 태양전지의 유리 기판 두께가 2.2 mm 이상이고, 제 1 코팅층(310)의 두께가 10 내지 100 ㎛인 점에서 UV 조사에 따라 코팅층을 경화시키는 경우, 기판 내부 재료의 영향은 없게 된다. In one embodiment of the present invention, the cured material is a UV curing agent, and the coating layer 320 and the first coating layer 310 thereunder is cured by UV irradiation for a very short time (for example within a few seconds) to the back of the substrate Adheres to In particular, the present invention minimizes the effect of UV irradiation into the dye-sensitized solar cell through a photocuring method performed in a short time, and also removes the effect of thermal modification due to the thermal curing method. In particular, when the glass substrate thickness of a general dye-sensitized solar cell is 2.2 mm or more, and the thickness of the first coating layer 310 is 10 to 100 μm, the coating layer is cured by UV irradiation, and thus the influence of the material inside the substrate is not affected. .
본 발명에 따른 염료감응 태양전지는 기판 후면에 다양한 색상의 디자인을 패터닝함으로써 종래의 염료감응 태양전지가 가지는 단조로운 패턴의 한계를 극복함과 동시에 후면의 도포된 코팅층과 도료층을 통한 효율 증가의 효과를 동시에 달성한다. 본 발명의 또 다른 일 실시예에서 상기 제 1 코팅층은 투명한 색상으로 조사되는 빛의 역산란을 위한 기능층으로 기능할 수 있다. The dye-sensitized solar cell according to the present invention overcomes the limitations of the monotonous pattern of the conventional dye-sensitized solar cell by patterning a variety of colors on the back side of the substrate, and at the same time, the effect of efficiency increase through the coated coating layer and the paint layer on the back side. Achieve at the same time. In another embodiment of the present invention, the first coating layer may function as a functional layer for back scattering of light irradiated with a transparent color.
본 발명은 상술한 염료감응 태양전지를 포함하는 창호, 즉, 건물일체형 태양전지(BIPV)를 제공하며, 특히 후면의 채색으로 인하여 심미감과 사용자의 불편함을 최소화시킴과 동시에 효율이 향상된다. The present invention provides a window, that is, a building integrated solar cell (BIPV) including the dye-sensitized solar cell described above, and in particular, due to the coloring of the rear surface minimizes aesthetics and inconvenience of the user and improves efficiency.
실시예 Example
본 발명에 따라 후면채색형 염료감응 태양전지의 효율을 측정하였다. 이를 위하여, 300x300 mm 크기의 염료감응 태양전지 단위셀을 준비하였고, 이때 단위셀 활성면적은 539.12 cm2이었다. 이 중 하나(실시예)는 본 발명에 따른 백생 코팅층및 백색 코팅층 상부에 다양한 형태로 도료층을 적층하였다. 본 발명의 일 실시예에 따른 실시예의 염료감응 태양전지의 전면과 후면은 각각 도 4 및 5에 도시된 바에 따른다.According to the present invention, the efficiency of the back-coloured dye-sensitized solar cell was measured. To this end, a 300 x 300 mm dye-sensitized solar cell unit cell was prepared, wherein the unit cell active area was 539.12 cm 2. One of these (example) laminated the paint layer in various forms on the white coating layer and the white coating layer according to the present invention. The front and rear surfaces of the dye-sensitized solar cell of the embodiment according to the embodiment of the present invention are as shown in FIGS. 4 and 5, respectively.
비교예로서, 후면에 코팅층이 적층되지 않은, 실시예 1과 동일한 크기, 활성 면적의 염료감응 태양전지를 준비하였다. As a comparative example, a dye-sensitized solar cell having the same size and active area as in Example 1, in which a coating layer was not laminated on the rear surface, was prepared.
도 6은 상기 실시예와 비교예에 따른 염료감응 태양전지의 효율을 비교한 결과이다. 6 is a result of comparing the efficiency of the dye-sensitized solar cell according to the embodiment and the comparative example.
도 6을 참조하면, 백색의 코팅층이 도포된 후, 다양한 색의 채색층이 후면에 도포된 본 발명의 염료감응 태양전지는 모든 특성이 향상되었음을 알 수 있다. 즉, 상기 결과로부터, 기판의 후면에 백색 코팅층을 도포한 후 상기 백색 코팅층 상에 다양한 색을 구현한 본원발명의 염료감응 태양전지는 상당히 우수한 전지 효율을 나타냄을 알 수 있다.Referring to Figure 6, after the white coating layer is applied, it can be seen that the dye-sensitized solar cell of the present invention in which the colored layers of various colors are applied to the back side, all the characteristics are improved. In other words, it can be seen that the dye-sensitized solar cell of the present invention which realizes various colors on the white coating layer after applying the white coating layer on the back side of the substrate shows a considerably excellent cell efficiency.
본 발명은 도면에 도시된 실시예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호 범위는 첨부된 등록청구범위의 기술적 사상에 의해 정해져야 할 것이다.Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.
본 발명에 따른 염료감응 태양전지는 건물 등에 결합되어, 전력 생산 수단으로 사용될 수 있는, 산업상 이용가능성이 있다. Dye-sensitized solar cells according to the present invention have industrial applicability, which can be combined with buildings and the like and used as power generation means.

Claims (6)

  1. 두 개의 기판이 소정 간격으로 이격되어, 서로 대향하며, 상기 상부 기판 및 하부 기판 사이에 전해질이 충전된 염료감응 태양전지로서, 상기 기판 중 어느 하나의 외측상에는 경화성 물질을 포함하는 제 1 코팅층; 및 상기 제 1 코팅층 상에 도포된 도료층을 포함하는 것을 특징으로 하는, 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지.A dye-sensitized solar cell in which two substrates are spaced apart at predetermined intervals to face each other, and an electrolyte is filled between the upper substrate and the lower substrate, the first coating layer including a curable material on an outer side of any one of the substrates; And a paint layer applied on the first coating layer. The dye-sensitized solar cell having improved efficiency by using backside coloring.
  2. 제 1항에 있어서, The method of claim 1,
    상기 제 1 코팅층은 백색을 띠는 것을 특징으로 하는. 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지.The first coating layer is characterized in that the white. Dye-sensitized solar cell with improved efficiency using backside coloring.
  3. 제 2항에 있어서, The method of claim 2,
    상기 도료층은 상기 제 1 코팅층과 동일한 경화성 물질을 포함하는 것을 특징으로 하는, 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지.The paint layer comprises the same curable material as the first coating layer, dye-sensitized solar cell with improved efficiency using the back coloring.
  4. 제 3항에 있어서,The method of claim 3, wherein
    상기 경화성 물질은 UV 경화성 물질이며, 상기 제 1 코팅층과 도료층은 도포 후 1회 UV 조사에 의하여 동시에 경화된 것을 특징으로 하는, 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지.The curable material is a UV curable material, characterized in that the first coating layer and the coating layer is cured at the same time by a single UV irradiation after application, dye-sensitized solar cell improved efficiency using the back coloring.
  5. 제 4항에 있어서, The method of claim 4, wherein
    상기 제 1 코팅층은 10 내지 100 ㎛의 두께인 것을 특징으로 하는, 후면 채색을 이용하여 효율이 향상된 염료감응 태양전지.The first coating layer is characterized in that the thickness of 10 to 100 ㎛, dye-sensitized solar cell improved efficiency by using the back coloring.
  6. 제 1항 내지 제 5항 중 어느 한 항에 따른 염료감응 태양전지를 포함하는 창호.A window comprising a dye-sensitized solar cell according to any one of claims 1 to 5.
PCT/KR2012/002002 2011-05-16 2012-03-21 Dye-sensitized solar cell having improved efficiency by using back surface coloring, and window including having same WO2012157842A1 (en)

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KR20080029230A (en) * 2006-09-28 2008-04-03 한국전자통신연구원 Die-sensitized solar cells having selective light-blocking layer
KR20090102912A (en) * 2008-03-27 2009-10-01 해성쏠라(주) Solar Cell Modules Having Designed Decorating Portions and the Manufacturing Method thereof
KR20110047402A (en) * 2009-10-30 2011-05-09 최윤정 Dye-sensitized Solar Cell

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AT518340A1 (en) * 2016-02-26 2017-09-15 Sfl Tech Gmbh Glass module, building with at least one glass module and method for producing a glass module
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