WO2013149787A1 - A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell - Google Patents
A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell Download PDFInfo
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- WO2013149787A1 WO2013149787A1 PCT/EP2013/054753 EP2013054753W WO2013149787A1 WO 2013149787 A1 WO2013149787 A1 WO 2013149787A1 EP 2013054753 W EP2013054753 W EP 2013054753W WO 2013149787 A1 WO2013149787 A1 WO 2013149787A1
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- Prior art keywords
- porous
- insulating substrate
- conducting layer
- layer
- conducting
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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, LIGHT-SENSITIVE OR TEMPERATURE-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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G9/2022—Light-sensitive devices characterized by he counter electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G9/2077—Sealing arrangements, e.g. to prevent the leakage of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022466—Electrodes made of transparent conductive layers, e.g. TCO, ITO layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0236—Special surface textures
- H01L31/02366—Special surface textures of the substrate or of a layer on the substrate, e.g. textured ITO/glass substrate or superstrate, textured polymer layer on glass substrate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/60—Forming conductive regions or layers, e.g. electrodes
- H10K71/611—Forming conductive regions or layers, e.g. electrodes using printing deposition, e.g. ink jet printing
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G9/2004—Light-sensitive devices characterised by the electrolyte, e.g. comprising an organic electrolyte
- H01G9/2009—Solid electrolytes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
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- 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
-
- 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
- Y02E10/549—Organic PV cells
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a dye-sensitized solar cell module having a serial structure comprising at least two dye-sensitized solar cell units arranged adjacent to each other and connected in series.
- the present invention also relates to a method for manufacturing dye- sensitized solar cells having a serial structure.
- DSC Dye-sensitized solar cells
- a conventional sandwich type dye-sensitized solar cell has a few micrometer thick porous Ti02 electrode layer deposited onto a transparent conducting substrate.
- the Ti02 electrode comprises interconnected Ti02 metal oxide particles dyed by adsorbing dye molecules on the surface of the Ti02 particles and forming a working electrode.
- the transparent conducting substrate is normally a transparent conducting oxide deposited onto a glass substrate.
- the transparent conducting oxide layer serves the function as a back contact extracting photo- generated electrons from the working electrode.
- the Ti02 electrode is in contact with an electrolyte and another transparent conducting substrate, i.e. a counter electrode.
- Sunlight is harvested by the dye, producing photo-excited electrons that are injected into the conduction band of the Ti02 particles and further collected by the conducting substrate.
- I- ions in the redox electrolyte reduce the oxidized dye and transport the generated electron acceptors species to the counter electrode.
- the two conducting substrates are sealed at the edges in order to protect the DSC modules against the surrounding atmosphere, and to prevent the evaporation or leakage of the DSC modules inside the cell.
- WO2012/020944 discloses a conventional sandwich type DSC module having a serial structure.
- the DSC module includes a plurality of DCS units arranged adjacent to each other and connected in series.
- Each DCS unit includes a working electrode including a first transparent conducting substrate adapted to face the sun and to transmit the sun light to a porous semiconductor layer containing an adsorbed dye and coated thereon, and a counter electrode including a second transparent conducting substrate having a conducting layer made of carbon or metal coated thereon.
- the serial structure of the DSC module includes patterns of the porous nanoparticle oxide layer and the conducting layer, which are formed in the working electrode and the counter electrode, respectively. Each of the nanoparticle oxide layer of the working electrode and the conducting layer of the counter electrode face each other to form a unit cell.
- the unit cells are electrically insulated by protective barriers, and an electrolyte is filled between the working electrode and the counter electrode.
- the porous nanoparticle oxide layer of the working electrode and the conducting layer of the counter electrode are longitudinally displaced relative each other.
- the working electrode on one side and the counter electrode on the other side are electrically interconnected by a series connecting element including a hole penetrating the working electrode and counter electrode which face each other, and conductive material filling the hole.
- the hole penetrates though the entire DSC module and is surrounded on both sides by protective barriers, which prevents the conductive material from contact with the electrolyte and accordingly prevents the conductive material from corrosion.
- the conductive material filled in the hole may be paste, adhesive, or an ink type and may be filled in the hole by means of printing, dropping, dispensing, jetting, stamping or sputtering.
- a problem with this type of DSC module is that it is difficult to produce a layer which is conducting at the same time as it is transparent. A compromise between those demands always has to be done, which leads to decreased current-handling capability of the DSC module and accordingly reduced efficiency of the DSC module. Further, it is time consuming to drill the holes through each cell unit before they are filled with conductive materials, which increases the costs for manufacturing the DSC module.
- Another disadvantage with this DSC module is the need of protective barriers on each side of the series connecting element to prevent the conductive material from contact with the electrolyte. The protective barriers increase the manufacturing cost.
- WO 2011/096154 discloses a DCS module including a porous insulating layer, a working electrode including a porous conducting metal layer formed on top of the porous insulating layer and creating a back contact, and a porous semiconductor layer containing an adsorbed dye arranged on top of the porous conducting metal layer, a transparent substrate facing the porous semiconductor layer, adapted to face the sun and to transmit the sun light to the porous semiconductor layer.
- the DSC module further includes a counter electrode including a conducting substrate arranged on a side opposite to the porous semiconductor layer of the porous insulating layer, and at a distance from the porous insulating layer, thereby forming a space between the porous insulating layer and the conducting substrate.
- the porous insulating layer is preferably made of a molded fiber glass compact.
- the porous conducting metal layer is formed from materials which are selected from a group consisting of Ti, W, Ni, Pt and Au.
- the porous conducting metal layer may be created using a paste including metallic particles which is applied on top of the porous insulating layer by printing, and followed by heating, drying and baking.
- the remaining chips can cause problems when assembling the DSC modules because the chips consume a certain volume and space. Remaining chips at certain places can lead to inhomogeneous distance between the assembled layers or even malfunction or destruction of the assembled layers.
- Another problem with drilling is that the drilling tool can be abrased leaving traces of unwanted substances which can interfere destructively with the performance of the DSC. It is, e.g., well known that the DSC is sensitive to trace amounts of iron and other metals that are used in drilling tools.
- EP0859386 discloses a dye-sensitized solar cell including a porous insulating substrate, a working electrode, a first porous conducting layer for extracting photo-generated electrons from the working electrode formed on one side of the porous insulating substrate, and a counter electrode having a second porous conducting layer formed on the opposite side of the porous insulating substrate.
- DSC dye-sensitized solar cell
- the DCS module has a serial structure comprising at least two dye-sensitized solar cell units arranged adjacent to each other and connected in series.
- Each cell unit includes a working electrode, a first conducting layer for extracting photo-generated electrons from the working electrode, a counter electrode including a second conducting layer, an electrolyte for transferring electrons from the counter electrode to the working electrode, and a series connecting element for electrically connecting the working electrode or the counter electrode to a counter electrode or working electrode, respectively, of an adjacent cell unit.
- the DCS module is characterized in that the solar cell module comprises a porous insulating substrate, the first conducting layer is a porous conducting layer formed on one side of the porous insulating substrate, and the second conducting layer is a porous conducting layer formed on the opposite side of the porous insulating substrate, and the series connecting element is a conducting layer penetrating through the porous insulating substrate and extending between the first conducting layer of a cell unit and the second conducting layer of an adjacent cell unit, thereby electrically connecting the first conducting layer of one of the cell units with the second conducting layer of the adjacent cell unit.
- the conducting layers are porous conducting layers, which can be applied on both sides of the insulating substrate using a printing method, which leads to a lean production and significantly reduces the costs for manufacturing the DSC module.
- the series connecting element is formed by a conducting layer penetrating through the porous insulating substrate.
- the series connecting element can also be manufactured using a printing technique, which further reduces the costs for manufacturing the DSC module. Since the invention enables the use of a printing technique for manufacturing the series connecting element, it is no longer necessary to drill any holes through the entire DCS module, and thereby the risk for destroying the insulating substrate is eliminated. That makes is possible to use a sensitive material, such as a ceramic paper, as the porous insulating substrate.
- the series connecting element becomes a porous conducting layer.
- the conducting layer of the series connecting element is made of a non-corrosion sensitive, conductive material resistant to temperatures above 500°C in air without oxidizing significantly, such as Ti, Ti alloys, Ni alloys, graphite, and amorphous carbon.
- a further advantage with the DSC module according to the invention is that it is thin and has a compact architecture, which reduces the size of the DSC module.
- the fact that the component is thin and has a compact architecture makes it easier to provide series connection of the cell units.
- the porosity of the insulating substrate and the conducting layers allows ionic transport through the layers and the substrate, and accordingly between the working electrode and the counter electrode.
- This structure makes it possible to arrange the working electrode on top of the first conducting layer and thus the first conducting layer does not have to be transparent, leading to an increased current-handling capability for the DSC module.
- the first and second conducting layers include particles which are too large to be able to penetrate through the porous insulating substrate. This ensures that the first and second conducting layers do not penetrate through the porous insulating substrate and accordingly will stay on one side of the substrate.
- the thickness of the porous insulating substrate is between 4 ⁇ and ⁇ .
- a thin substrate reduces the thickness of the series connecting element and accordingly reduces resistive losses. Further, a thin substrate makes it easy to arrange a series connecting element penetrating through the substrate.
- the first and second porous conducting layers are made of a non-corrosion sensitive, conductive material resistant to temperatures up to 500°C in air without oxidizing, such as Ti, Ti alloys, Ni alloys, graphite, and amorphous carbon, to allow the conducting layers to be in contact with the electrolyte without any corrosion and to make it possible to sinter the conducting layer at temperatures about 450-550 °C.
- a non-corrosion sensitive, conductive material resistant to temperatures up to 500°C in air without oxidizing such as Ti, Ti alloys, Ni alloys, graphite, and amorphous carbon
- the porous conducting layer of the series connecting element contains particles small enough to penetrate through the porous insulating substrate. This embodiment ensures that the series connecting element will penetrate through the porous insulating substrate and thereby electrically connect the first and second conducting layers.
- the first and second conducting layers of a cell unit are longitudinally displaced relative each other to allow the conducting layer of the series connecting element to extend between one end of the first conducting layer of a cell unit and an opposite end of the second conducting layer of an adjacent cell unit.
- opposite end is meant a front end if one end of the other layer is a rear end and vice versa.
- the series connecting element extends between a front end of one of the conducting layers and a rear end of the other conducting layer.
- This embodiment makes it possible to manufacture the series connecting elements perpendicular to the extension plane of the insulating substrate, for example by a printing technique, which facilitates manufacturing of the DSC module.
- each cell unit is surrounded by an ion barrier in the form of a non-porous layer penetrating through the porous insulating substrate to prevent the electrolyte from leaking to an adjacent cell unit.
- an ion barrier in the form of a non-porous layer penetrating through the porous insulating substrate to prevent the electrolyte from leaking to an adjacent cell unit.
- This embodiment avoids electrolyte migration between series connected neighboring cell units leading to losses in DSC efficiency.
- This embodiment enables the use of an electrolyte in liquid form.
- the electrolyte can be in the form of a gel or in a solid form that immobilizes the electrolyte to prevent the electrolyte from leaking to an adjacent cell unit. With an adequate immobilization of the electrolyte the ion barrier can be excluded.
- the series connecting element is a porous conducting layer and the ion barrier penetrates through the series connecting element.
- the area of the working electrodes are denoted the active area of the solar cell module.
- the efficiency of the solar cell module depends on the relation between the active area and the total area of the solar cell module.
- the ion barrier is made of a polymer material.
- a polymer material can be melted and drained through the porous insulating substrate and the porous conducting layer of the series connecting element to fill the holes in the substrate and thereby achieve a liquid barrier between the solar cell units, which prevents electrolyte to move from one solar cell unit to another solar cell unit.
- a liquid barrier between the solar cell units can be formed by soaking a liquid polymeric adhesive into the porous insulating substrate and the porous conducting layer of the series connecting element and thereafter curing the adhesive, e.g., chemically or by heat or by light.
- the method comprises applying the first conducting layers of the cell units in the form of porous conducting layers on one side of a porous insulating substrate, and
- This method makes it possible to use the same technique for manufacturing the working electrode and the counter electrode.
- the method also makes it possible to select a simple technique for manufacturing the working electrode and the counter electrode, such as screen printing, thereby simplifying the manufacturing of the DSC components and thus reducing the manufacturing costs.
- This method makes it easy to manufacture a thin DSC component with a compact architecture.
- the method comprises printing with an ink including conductive particles on at least two adjacent but separate areas on one side of the porous insulating substrate to form the first porous conducting layers, and printing with an ink including conductive particles on at least two adjacent but separate areas on the opposite side of the porous insulating substrate to form the second porous conducting layers.
- Using a printing technique makes it is easy to provide a plurality of electrically separated areas of defined shapes on the insulated substrate, which areas form the first and second conducting areas of a plurality of DSC units.
- the method further comprises forming series connecting elements in the form of conducting layers penetrating through the porous insulating substrate.
- the conducting layer of the working electrode is formed as a porous conducting layer on one side of a porous substrate and the conducting layer of the counter electrode is formed as a porous conducting layer on the other side of the porous substrate, the series connecting element only has to penetrate through the porous substrate to be able to connect the working electrode of one cell unit with the counter electrode of an adjacent cell unit. Due to the porous material, the porous substrate is easy to penetrate. Thus, the step to drill holes through the entire DSC module can be omitted, which simplifies the manufacturing process and reduces the manufacturing costs.
- the series connecting element as a conducting layer penetrating the porous insulating substrate
- a simple manufacturing technique for example screen printing, can be used for manufacturing the series connecting element.
- the same manufacturing technique can be used for manufacturing the series connecting element and the conducting layers, thereby further reducing the manufacturing costs.
- the series connecting elements are formed by printing on the porous insulating substrate with an ink including conductive particles which penetrates through the porous insulating substrate.
- the method further comprises: - applying the first conducting layers of the cell units such that the first conducting layer of one of the cell units is electrically connected to the series connecting element, and the first conducting layer of an adjacent cell unit is electrically separated from the series connecting element, and
- the first and second layers are printed with an ink including conductive particles which are too large to be able to penetrate through the porous insulating substrate and the series connecting element is formed by printing on the porous insulating substrate with an ink including conductive particles small enough to penetrate through the porous insulating substrate.
- the size of the particles in the ink it is possible to determine whether the porous layer will be provided on top of the porous insulating substrate, or if the layer will penetrate through the substrate. If the particle of the first and second conducting layer is larger than the pores in the substrate, the particles will stay on top of the substrate and if the particles are smaller than the pores in the substrate, the particles will penetrate through the substrate.
- the series connecting element is formed by perforating the porous insulating substrate and pouring ink with conductive particles through the perforated part of the substrate.
- perforated is meant a plurality of very small holes arranged on a line and through the substrate.
- the method comprises: printing with an ink including conductive particles on the porous insulating substrate to form the series connecting element, printing with an ink including conductive particles on at least two adjacent but separate first areas on one side of a porous insulating substrate to form the first porous conducting layers, such that the first area of one of the cell units is in electrical contact with the series connecting element and the first area of the other cell unit is electrically separated from the series connecting element, and printing with an ink including conductive particles on at least two adjacent but separate second areas on the opposite side of the porous insulating substrate to form the second porous conducting layers, such that the first and second areas are displaced lengthwise relative each other and so that the second area of the one of the cell units is electrically separated from the series connecting element and the second area of the other cell unit is in electrical contact with the series connecting element. It is advantageous to first print the series connecting element and then print the first and second conducting layers in contact with the series connecting element.
- the method comprises providing an ion barrier in the form of a non-porous layer surrounding each cell unit in order to prevent the electrolyte from leaking to an adjacent cell unit.
- the non-porous layer penetrates through the porous insulating substrate.
- the polymer material may be positioned so that the polymer material penetrates through the series connecting element.
- the ion barrier is provided by applying a polymer material so that the polymer material penetrates through the first conducting layer, the porous insulating substrate, and the second conducting layer.
- the polymer material is applied so that the polymer material penetrates through the series connecting element.
- Fig. la shows a cross section through a dye-sensitized solar cell module according to a first embodiment of the invention.
- Fig. lb shows a cross section through a dye-sensitized solar cell module according to a second embodiment of the invention.
- Figs. 2 - 11 illustrate a method for manufacturing a dye-sensitized solar cell module according to an embodiment of the invention.
- Fig. 12 shows an example of a dye-sensitized solar cell module according to an embodiment of the invention in a view from above
- FIG. 1 shows a cross section through a dye-sensitized solar cell (DSC) module 1 having a serial structure according to a first embodiment of the invention.
- the DSC module comprises a plurality of DSC units 2a-c arranged adjacent to each other and connected in series.
- Each DSC unit 2a-c includes a working electrode 3 and a counter electrode 5.
- the space between the working electrode and the counter electrode is filled with an electrolyte including ions for transferring electrons from the counter electrode to the working electrode.
- the counter electrode transfers electrons to the electrolyte.
- the DSC module comprises a first conducting layer 4 for extracting photo-generated electrons from the working electrode.
- the first conducting layer 4 serves as a back contact that extracts electrons from the working electrode.
- the first conducting layer 4 is named the back contact layer.
- the working electrode 3 includes a porous Ti02 electrode layer deposited onto the first conducting layer 4.
- the Ti02 electrode comprises Ti02 particles dyed by adsorbing dye molecules on the surface of the Ti02 particles.
- the working electrode is positioned on a top side of the DCS module. The top side should be facing the sun to allow the sunlight to hit the dye molecules of the working electrode.
- the DSC module further includes a porous insulating substrate 7 arranged between the working electrode and the counter electrode.
- the porosity of the porous insulating substrate will enable ionic transport through the substrate.
- the porous insulating substrate is a ceramic microfiber-based substrate, such as a glass microfiber or a ceramic microfiber substrate.
- the porous substrate is based on a glass textile combined with glass paper. This makes it possible to provide a thin and strong substrate.
- the ceramic substrates are electrical insulators, but are porous and thereby allowing liquids and electrolyte ions to penetrate.
- the ceramic substrates can be handled in the form of sheets or in the form of rolls for a continuous process.
- the ceramic substrates are chemically inert, can withstand high temperatures, and are readily available, cheap and simple to handle in various process steps.
- a suitable ceramic substrate ca n be based on a woven microfiber glass fiber made of glass yarn. Woven fibers are much stronger than non-woven fibers. Additionally, woven fibers are inherently much mechanically stronger compared to non-woven fibers. Additionally the thickness of woven fibers can be made very thin with maintained mechanical strength. However, woven fibers often have large holes which allow a large amount of particles in the printed inks to pass right through the woven fiber in an uncontrolled way across the entire area of the woven fiber. This is an unwanted effect.
- non-woven glass fibers on top of the woven textile. This can be done by soaking the woven textile in a solution containing glass fibers and then removing the solvent. If a binder such as colloidal silica is used together with the glass fibers then the non-woven glass fiber can stick stronger to the woven fiber and will form a continuous sticking film of non-woven glass fiber on top of the woven glass fiber. By depositing non-woven glass fibers on top of the woven fiber it is possible to prevent that particles in the inks passes right through the woven fiber. The thinner the porous substrate is the better it is, since a small distance between the back contact and the counter electrode provide minimal losses in resistance.
- the thickness of the porous insulating substrate is larger than 4 ⁇ and less than ⁇ . More preferably, the thickness of the porous insulating substrate is less than 50 ⁇ .
- the thickness of the porous insulating substrate is typically between 10 - 30 ⁇ .
- the porosity of the substrate is larger than 40%.
- the porosity of the substrate is close to 90%.
- the porosity of the substrate is between 40 and 90%.
- the back contact layer 4 is a porous conducting layer deposited on an upper side of the porous insulating substrate 7.
- each DSC unit 2a-c includes a second conducting layer 5, in the following named the counter electrode layer.
- the counter electrode layer 5 is a porous conducting layer deposited on the opposite (lower) side of the porous insulating substrate 7.
- the back contact layer 4 and the counter electrode layer 5 are separated physically and electrically by the porous insulating substrate 7and therefore they are not in direct physical and electrical contact.
- the back contact layer 4 and the counter electrode layer 5 deposited on the upper and lower sides of the porous insulating substrate of a DSC unit are electrically connected via ions penetrating the porous insulating substrate.
- the porosity of the porous conducting layers 4,5 shall preferably be between 30% and 85%, or between 35% and 70%, or between 40% and 60%.
- the thickness of the layer can vary from around 1 micrometer up to 100 micrometers or from 1 micrometer to 50 micrometers.
- a porous conducting layer When a porous conducting layer is used as a counter electrode, it is part of the counter electrode opposite to the working electrode.
- the counter electrode normally comprises a catalytic layer.
- the porous conducting layer acting as counter electrode can have a separate catalytic layer or have catalytic particles integrated in the porous conducting layer.
- the DSC module includes a plurality of pairs of first and second porous conducting layers disposed on opposite sides of the porous insulating substrate.
- Each DSC unit includes a pair of first and second porous conducting layers.
- the first and second porous conducting layers of one DCS unit are position so that they face each other.
- a space 8 is formed between the working electrodes 3 and first conducting layers of adjacent cell units and a space 9 is formed between the counter electrodes 3 of adjacent cell units, in order to electrically separate the cell units.
- the first and second porous conducting layers are slightly longitudinally displaced relative each other such that a front end 4a of the first conducting layer 4 of a DSC unit 2a face a rear end 5a of the second conducting layer 5 of an adjacent DSC unit 2b.
- the DSC unit further includes series connecting element 6, which extends between the ends 4a, 5a of the first and second conducting layers of adjacent cell units thereby electrically connecting the first conducting layer of one of the cell units with the second conducting layer of an adjacent cell unit.
- the series connecting element 6 electrically connects the counter electrode 4 of one cell unit to the working electrode 5 of an adjacent cell unit to create an electrical series connection of two DSC units to increase the output voltage.
- the series connecting element 6 is a porous conducting layer penetrating through the porous insulating substrate 7 and extending between the back contact layer 4 of one of the cell units and the counter electrode layer 5 of an adjacent cell unit.
- the porous conducting layer 6 is used as an electrical series connecting layer, and is in direct physical contact with the back contact layer 4 and the counter electrode layer 5 of two adjacent DSC units.
- the porous conducting layer of the series connecting element 6 will be named the series connecting layer.
- the electrical series connecting layer penetrates the porous insulating substrate 7 and provides an electrical connection pathway between the top side of the porous insulating substrate and the bottom side of the porous insulating substrate. Since the thickness of the porous substrate is small, preferably in the order of a few ⁇ , the path for the current to travel is short and accordingly the demand on the conductivity of the series connecting layer is less than on the counter electrode layer 5 and the back contact layer 4.
- the porous conducting layers 4, 5, 6 will have low electrical losses due to their low resistivity.
- the porosity of the porous conducting layers will enable ionic and dye transport through the layers.
- the deposition of porous conducting layers on a porous insulating substrate 7 enables building of DSC modules including a plurality of electrically interconnected DSC units.
- the materials forming the porous conducting layers 4-6 must have a suitable corrosion resistance as to withstand the environment in the DSC, and preferably also be resistant to temperatures above 500°C in air without oxidizing.
- the porous conducting layers 4-6 are made of a material selected from a group consisting of titanium, titanium alloys, nickel alloys, graphite, and amorphous carbon, or mixtures thereof.
- the porous conducting layers are made of titanium or a titanium alloy or mixtures thereof.
- the DSC module 1 also includes a first sheet 10 covering a top side of the DSC module and a second sheet 11 covering a bottom side of the DSC module and acting as liquid barriers for the electrolyte.
- the first sheet 10 on the top side of the DSC module covers the working electrodes and needs to be transparent, allowing light to pass through.
- the sheets 10, 11 are, for example, made of a polymer material.
- ions from the electrolyte are not allowed to move between neighboring units.
- One solution to this problem is to immobilize the electrolyte by creating a gel electrolyte of the electrolyte and thereby preventing the liquid electrolyte from flowing between adjacent DSC units.
- Another solution can be to deposit a non-liquid electrolyte, such as a solid conductor.
- FIG. lb shows a cross section through a dye-sensitized solar cell module according to a second embodiment of the invention.
- each cell unit is surrounded by an ion barrier 12 in the form of a non-porous layer penetrating through the DCS module.
- the ion barrier 12 surrounds the DSC unit in order to prevent the electrolyte from leaking to an adjacent cell unit, or coming in contact with the electrolyte in an adjacent cell unit.
- the ion barrier 12 is deposited in the space 8 between the working electrode layers 3 and the back contact layers 4 of adjacent cell units.
- the ion barrier 12 penetrates through the porous insulating substrate 7, and between the counter electrode layers 5 of adjacent cell units.
- the ion barrier also penetrates through the series connecting layer 6.
- the ion barrier prevents ions from moving between adjacent cell units. However, it does not have any electrical insulating function.
- the first and second conducting layers 4,5, and the series connecting layer 6 are still conducting, although they are penetrated by the ion barrier.
- the ion barrier is, for example, made of a polymer material.
- the ion barrier is made of the same polymer material as the first and second sheets 10,11.
- porous conducting layers on upper and lower sides of a porous insulating substrate 7 in such a way that the porous conducting layers on the upper side of the porous insulating substrate are electrically interconnected with the porous conducting layers on the lower side of the porous insulating substrate will be described. Further, it is described how such an arrangement of porous conducting layers can be used to provide a cost-effective method for producing a DSC module comprising several electrically interconnected DSC units.
- an electrical connection between a back contact layer and a counter electrode layer can be formed as follows: First an electrically series connecting layer is deposited so that it penetrates through a porous insulated substrate.
- a back contact layer is deposited in such way that part of the back contact layer is deposited on top of the deposited series connecting layer such that the back contact layer is in direct contact with the series connecting layer.
- a counter electrode layer is deposited on the opposite side of the porous insulating substrate in such way that a part of the counter electrode layer is deposited at the same lateral position as the series connecting layer such that the counter electrode layer is in direct contact with the series connecting layer.
- the porous conducting layer is, for example, formed by deposition of a deposit comprising metal hydride particles onto a porous insulating substrate, and treating the deposit, so that the solid metal hydride particles transform into metal and the metal particles sinter to form a porous conducting layer.
- the deposit of metal hydride powder for example titanium hydride powder, can advantageously be printed onto a ceramic microfiber-based substrate such as a glass microfiber or a ceramic microfiber substrate.
- a porous conducting layer on both sides of the porous insulating substrate.
- the porous conducting layers 4, 5, 6 can be disposed on the porous insulating substrate by printing with an ink including solid conductive particles.
- the solid particles can be mixed with a liquid to form an ink suitable for the printing process.
- the metal hydrides can be mixed with a liquid to form an ink suitable for the printing process.
- the particles may also be milled or otherwise treated in order to achieve a suitable particle size for forming the porous conducting layer.
- the solid particles are preferably metal based and can be pure metals, metal alloys or metal hydrides or hydrides of metal alloys or mixtures thereof.
- the resulting porous conducting layers must have a suitable corrosion resistance as to withstand the environment in the DSC.
- Example of a suitable material is titanium or titanium-based alloys or mixtures thereof.
- suitable materials are nickel alloys.
- Other components in solid form may also be added to the ink.
- For printing the deposit various techniques known in the art can be used. Examples of printing techniques are slot die coating, gravure, screen printing, knife coating, blade coating, doctor blading, flexo printing, dip coating or spraying.
- the dry powder deposition can be made by for example sieving or electrostatic powder deposition.
- the deposit is treated by a heat treatment step.
- a sintering of the particles also shall take place, thereby increasing the conductivity and the mechanical stability of the layer.
- Metal hydrides will transform to metal during the heat treatment. By heating in vacuum or inert gas contamination of the particles is prevented, and electrical contact between particles improved.
- a fast heating process such as rapid thermal processing (RTP) or rapid thermal annealing (RTA) where the deposit is heated to high temperatures (up to 1200°C) on a time scale of seconds has advantages for avoiding contamination of the particles by the sintering atmosphere. Flash sintering can also be employed, i.e. using equipment such as Sinteron 2000, supplied by Polytec. Heat treatment temperatures shall be sufficient for sintering between the particles to take place. Temperatures depend on the material used, but are normally in the range of 700 - 1200°C. To achieve a catalytic effect in the counter electrode, it is possible to mix in platinized particles of conductive metal oxides with the metal hydride particles, such as platinized ITO, ATO, PTO, and FTO.
- RTP rapid thermal processing
- RTA rapid thermal annealing
- Platinized particles of conductive metal carbides, metal silicides and metal nitrides can also be mixed with the metal hydride particles. Also particles of platinized carbon black or graphite can be mixed with the metal hydride particles.
- Figure 2 shows a top view and two cross sections A-A and B-B of a porous insulating substrate 7 deposited with a series connecting layer 6a.
- the porous insulating substrate 7 is a ceramic microfiber.
- the cross sections illustrate that the series connecting layer penetrates the porous insulating substrate from the upper side to the lower side of the porous insulating substrate. This means that there is an electrical path from the upper side to the lower side of the porous insulating substrate.
- the series connecting layer 6a is printed with an ink containing particles that are small enough to penetrate the porous network inside the ceramic microfiber.
- the cross sections illustrate that the particles in the ink are penetrating the ceramic microfiber all the way from top to bottom of the substrate.
- FIG 3 shows a top view and two cross sections of the porous insulating substrate 7 deposited with a series connecting layer 6a that penetrates the porous insulating substrate. Additionally, two more porous conducting layers 4a-b are printed on the upper side of the insulating substrate 7 to form back contact layers. One of these back contact layers 4a is in direct contact with the series connecting layer 6a, as can be seen in the top view and the bottom cross section B-B, and the other back contact layer 4b is not in electrical contact with the series connecting layer 6a. It can be seen from the cross sections that the two layers 4a-b do not penetrate the insulating substrate 7 and that they are deposited on top of the insulating substrate 7 and are in contact with the insulating substrate 7. One of the layers 4a is in electrical contact with the penetrating layer 6a.
- the porous conducting layers 4a-b are printed with an ink including conductive particles which are too large to be able to penetrate through the porous network inside the ceramic microfiber.
- Figure 4 shows a DSC module with two adjacent DCS units which are series-connected.
- Figure 4 shows a top view and two cross sections of the porous insulating substrate 7 deposited with the series connecting layer 6a and the back contact layers 4a-b printed on the upper side of the insulating substrate 7. Furthermore, two more layers 5a-b are printed on the other side of the substrate 7, i.e., the bottom side of the substrate to form counter electrode layers.
- the counter electrode layers 5a-b are not shown in the top view but only in the cross sectional views.
- the bottom cross sectional view B-B shows that one of the layers 5b printed on the bottom side of the insulating substrate 7 is in direct contact with the series connecting layer 6a and therefore in direct electrical contact with the series connecting layer 6a.
- one of the counter electrode layers 5b is in electrical contact with one of the back contact layers 4a through the series connecting layer 6a.
- the porous conducting layers 5a-b are printed with an ink including conductive particles which are too large to be able to penetrate through the porous network inside the ceramic substrate 7.
- it is often desirable to design an electrical series connection direction pattern such that the output terminals from the DCS units are physically positioned close to each other.
- An example of such pattern is shown in figure 12.
- the direction of the electrical series connection is indicated by the curved line. Figures 2 - 11 illustrate how this can be achieved.
- Figure 5 shows a top view and two cross sections A-A and B-B of a porous insulating substrate 7 deposited with a series connecting layer 6b that penetrates the porous insulating substrate, and which is perpendicular to the series connecting layer 6a.
- the series connecting layer 6b is produced in the same way as the series connecting layer 6a, and preferably produced at the same time.
- Figure 6 shows a top view and two cross sections of the porous insulating substrate 7 deposited with the series connecting layer 6b. Additionally, two more porous conducting layers 4a and 4c are printed on the upper side of the insulating substrate 7 to form back contact layers. One of these back contact layers 4c is in direct contact with the series connecting layer 6b, as can be seen in the top view and the bottom cross section B-B, and the other back contact layer 4a is not in electrical contact with the series connecting layer 6b.
- Figure 7 shows a DSC module with two adjacent DCS units which are series-connected.
- Figure 7 shows a top view and two cross sections of the porous insulating substrate 7 deposited with the series connecting layer 6b and the back contact layers 4a and 4c. Furthermore, two more layers 5a and 5c are printed on the other side of the insulating substrate 7 to form counter electrode layers.
- the counter electrode layers 5a and 5c are not shown in the top view but only in the cross sectional views.
- the cross sectional view A-A shows that one of the counter electrode layers 5a and one of the back contact layers 4c are in direct contact with the series connecting layer 6b. This means that the counter electrode layer 5a is in electrical contact with the back contact layer 4c through the series connecting layer 6a.
- Figure 8 shows a top view and two cross sections A-A and B-B of a porous insulating substrate 7 deposited with a series connecting layer 6c that penetrates the porous insulating substrate, and which aligns with the series connecting layer 6a and perpendicular to the series connecting layer 6b.
- the series connecting layer 6c is produced in the same way as the series connecting layer 6a and 6b, and preferably produced at the same time.
- Figure 9 shows a top view and two cross sections of the porous insulating substrate 7 deposited with the series connecting layer 6c. Additionally, two more porous conducting layers 4c and 4d are printed on the upper side of the insulating substrate 7 to form back contact layers. One of these back contact layers 4d is in direct contact with the series connecting layer 6c, as can be seen in the top view and the bottom cross section B-B, and the other back contact layer 4c is not in electrical contact with the series connecting layer 6c.
- Figure 10 shows a DSC module with two adjacent DCS units which are series-connected.
- Figure 10 shows a top view and two cross sections of the porous insulating substrate 7 deposited with the series connecting layer 6c and the back contact layers 4c and 4d. Furthermore, two more layers 5c and 5d are printed on the other side of the substrate to form counter electrode layers.
- the counter electrode layers 5c and 5d are not shown in the top view but only in the cross sectional views.
- the cross sectional view B-B shows that one of the counter electrode layers 5a and one of the back contact layers 4d are in direct contact with the series connecting layer 6c. This means that the counter electrode layer 5c is in electrical contact with the back contact layer 4d through the series connecting layer 6c.
- Figure 11 shows a DSC module with four adjacent DCS units which are series-connected by means of the series connecting layers 6a-c.
- the counter electrode layer 5b of a first DSC unit is connected to a back contact layer 4a of a second DSC unit via the series connecting layers 6a.
- the counter electrode layer 5a of the second DSC unit is connected to a back contact layer 4c of a third DSC unit via the series connecting layers 6b.
- the counter electrode layer 5c of the third DSC unit is connected to a back contact layer 4d of a forth DSC unit via the series connecting layers 6c.
- the series connecting layers 6a-c are printed on the insulating substrate 7 at the same time and in a first production step.
- the back contact layers 4a-d are printed on the insulating substrate 7 at the same time in a second production step and the counter electrode layer 5a-d are printed on the insulating substrate 7 at the same time in a third production step.
- the printed layers are treated, for example by heating and sintering, to form porous conducting layers.
- the porous layers 3 of the working electrode are deposited on top of the back contact layers 4.
- the insulating substrate 7 shown in figure 11 is printed with three deposits 6a-c of an ink containing particles that are small enough to penetrate the porous network inside the ceramic microfiber. Additionally, four more layers are printed on top of the insulating substrate 7 with an ink containing particles that are too large to penetrate the porous network inside the ceramic microfiber. Three of those four layers are in direct contact with a deposit of the penetrating ink, as can be seen in the top view. Therefore three of these layers are in electrical contact with the respective penetrating layer. Furthermore, four more layers are printed on the other side of the insulating substrate 7, i.e., the bottom side of the insulating substrate 7 with an ink containing particles that too large to penetrate the porous network inside the ceramic microfiber.
- the layers are not shown in the top vie. This means that one of the bottom layers is in electrical contact with one of the top layers through the penetrating layer.
- the figure shows that it is possible to change the direction of the electrical series connection.
- the direction of the electrical series connection is indicated by the curved line.
- the direction of the electrical series connection can be changed simply by printing penetrating ink at different locations on the insulating substrate 7 and by printing top layers and bottom layers in such a way that electrical series connection is obtained in the desired way.
- Figure 12 shows an example of a DSC module including a large number of DSC units connected in series such that the output terminals 14 from the units are physically positioned close to each other.
- a DSC module comprising at least two dye- sensitized solar cell units arranged adjacent to each other and connected in series can be manufactured with a method comprising:
- a DSC module comprising at least two dye- sensitized solar cell units arranged adjacent to each other and connected in series can be manufactured with a method comprising:
- Example 1 Back contacts and counter electrode and a series connecting layer on a porous ceramic substrate.
- a first ink is prepared by mixing TiH2 powder with terpineol. The ink is then bead milled for 3 hours at 8000 RPM using 0.6 mm zirconia beads. The zirconia beads are separated from the ink by filtration. The ink comprises TiH2 particles with a diameter smaller than 0.3 micrometer. Subsequently the ink is printed in the shape of a 3 mm wide and 10 cm long rectangle (see 6a in fig. 2) onto a 15 ⁇ thick, porous glass microfiber based substrate (see 7 in fig. 2) and then dried at 200°C for 5 minutes. The particle diameter of the TiH2 in the ink was small enough for the
- the porous glass microfiber substrate includes a 10 ⁇ thick woven textile made of glass yarn coated with a 5 ⁇ thick layer of non-woven glass fibers.
- a second ink is prepared by mixing TiH2 with terpineol. The ink is then bead milled for 25 minutes at 6000 RPM using 0.3 mm zirconia beads. The zirconia beads are separated from the ink by filtration. The ink comprises TiH2 particles with a diameter that is smaller than 2 micrometer.
- the second ink is printed in the shape of two 10 cm wide and 12 cm long rectangles (see 4a and 4b in fig. 3) onto a substrate (see 7 in fig. 3) such that one edge of one of the 10 cm wide and 12 cm long rectangles (see 4a in fig. 3) is printed directly on top of the 3 mm wide and 10 cm long rectangle (see 6a in fig. 3).
- the edge of 4a in fig. 3 is positioned roughly in the center of the rectangle (see 4a and 6a in fig. 3).
- the second ink was then dried at 200°C for 5 minutes. The second printed layers will form back contact layers.
- a third ink is prepared by mixing TiH2 with terpineol.
- the ink is then bead milled for 25 minutes at 6000 RPM using 0.3 mm zirconia beads.
- the zirconia beads are separated from the ink by filtration.
- the ink comprises TiH2 particles with a diameter that is smaller than 2 micrometer.
- the filtered ink is then mixed with platinized conductive particles in order to make an ink for depositing counter electrodes.
- the third ink is printed in the shape of two 10 cm wide and 12 cm long rectangles (see 5a and 5b in fig. 4) onto the opposite side of the substrate (see 7 in fig. 4), such that layers 5a and 5b in fig. 4 face layers 4a and 4b in fig. 4.
- the printed substrate was then dried at 200°C for 5 minutes. The third printed layers will form counter electrodes.
- the printed ceramic substrate was vacuum sintered at 585°C and then allowed to cool down to room temperature.
- the pressure during sintering was lower than 0.0001 mbar.
- the sintered series connecting layer (6a fig. 4) and back contacts (4a, 4b fig. 4) and counter electrodes (5a, 5b fig.4) were electrically conducting.
- One of the back contacts (4a fig. 4) was electrically connected with one of the counter electrodes (see 5b fig. 4) via the series connecting layer (6a fig. 4).
- the sheet resistance of the back contacts and the counter electrodes was below 0.2 ohms/square.
- a variation of example 1 is that platinum free porous conducting layers are deposited on top of the platinum containing counter electrode layer. In such an arrangement the first platinum containing layer would act as a separate catalytic layer.
- the ink for printing the series connecting layer comprises conducting tin oxides like FTO, ITO, or ATO.
- Example 2 DSC fabrication.
- the printed and sintered porous glass microfiber based substrate obtained from example 1 was immersed into a 0.02 M TiCI4 solution in water and heat treated at 70° for 30 minutes. The layer was removed from the TiCI4 solution and rinsed in water and then ethanol. Subsequently two layers of Ti02 based ink (3 in fig. la) was printed on top of the back contacts (4a and 4b see fig. 4 d) and then dried. The thickness of the dried Ti02 ink layer was 1 - 2 ⁇ . A second 60 ⁇ thick layer of Ti02 ink was printed directly on top of the first layer of Ti02 and dried. A third Ti02 layer was printed on top of the second Ti02 layer and dried.
- the structure was subjected to a heat treatment in air at 500°C for 30 minutes. After allowing the structure to cool down; the structure was immersed in 0.02 M TiCI4 in water and heat treated at 70°C for 30 minutes. After rinsing the Ti02 deposited ceramic substrate in water and ethanol it was heat treated at 500°C in air for 5 minutes. Subsequently the Ti02 deposited porous conducting layer structure was immersed in a solution of 20 mM Z907 dye in methoxy- propanol and heat treated at 70°C for 30 minutes and then rinsed in methoxy propanol.
- electrolyte was deposited on top of 4a and 4b in the form of a gel and the cell was sealed by infiltrating a melted polymer at the edges around each DSC unit (see 12 in fig. lb) in the same time allowing for external electrical connection of the back contact of one DSC unit and external electrical connection of the counter electrode of the other DSC unit.
- a variation of example 2 is that one or both of the TiCI4 treatments are omitted.
- example 2 Another variation of example 2 is that the sealing around the edges of each DSC unit is printed by using a printable polymer or pre-polymer where the pre-polymer could be chemically curable, light curable or heat curable.
- the present invention is not limited to the embodiments disclosed but may be varied and modified within the scope of the following claims. Although, the steps of the invention are mentioned in the claims in a certain order, the claims are not limited to this order. For example, it does not matter whether the first or the second conducting layers are applied first. It is also possible to provide one or both of the first and second conducting layers on the porous insulating substrate before the porous insulating layer of the series connecting element is formed in the substrate.
- the porous insulating substrate can be perforated beforehand and the printing is made along the perforated parts with an ink including conductive particles. The ink and the conductive particles will penetrate through the perforated parts of the substrate. This method is not dependent on the size of the particles in the ink.
- porous layers between the porous insulating substrate and the porous back contact layer.
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Abstract
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Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
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KR1020147030946A KR101600740B1 (en) | 2012-04-04 | 2013-03-08 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
JP2015503796A JP5749875B2 (en) | 2012-04-04 | 2013-03-08 | Dye-sensitized solar cell module having series structure and method for manufacturing the solar cell |
ES13709404.1T ES2689409T3 (en) | 2012-04-04 | 2013-03-08 | Dye-sensitized solar cell module that has a series structure and method for manufacturing the solar cell |
CN201380018269.6A CN104246935B (en) | 2012-04-04 | 2013-03-08 | There is dye-sensitized solar cell assembly and the manufacture method of solaode of cascaded structure |
BR112014024936-9A BR112014024936B1 (en) | 2012-04-04 | 2013-03-08 | STAINLESS SENSITIVE SOLAR CELL MODULE HAVING A SERIES STRUCTURE AND SOLAR CELL MANUFACTURING METHOD |
CA2866778A CA2866778C (en) | 2012-04-04 | 2013-03-08 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
EP13709404.1A EP2834823B1 (en) | 2012-04-04 | 2013-03-08 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
MX2014012017A MX2014012017A (en) | 2012-04-04 | 2013-03-08 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell. |
AU2013242931A AU2013242931B2 (en) | 2012-04-04 | 2013-03-08 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
US14/390,479 US9607773B2 (en) | 2012-04-04 | 2013-03-08 | Dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
RU2014144301A RU2609672C2 (en) | 2012-04-04 | 2013-03-08 | Dye-sensitised solar cell module having serial structure and method for manufacturing solar cell |
ZA2014/06790A ZA201406790B (en) | 2012-04-04 | 2014-09-16 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
HK15105832.4A HK1205347A1 (en) | 2012-04-04 | 2015-06-18 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
US15/240,607 US10490359B2 (en) | 2012-04-04 | 2016-08-18 | Dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
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SE1230033-1 | 2012-04-04 | ||
SE1230033A SE537669C2 (en) | 2012-04-04 | 2012-04-04 | Dye-sensitized solar cell module with series-linked structural method for producing the solar cell |
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US14/390,479 A-371-Of-International US9607773B2 (en) | 2012-04-04 | 2013-03-08 | Dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
US15/240,607 Division US10490359B2 (en) | 2012-04-04 | 2016-08-18 | Dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
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PCT/EP2013/054753 WO2013149787A1 (en) | 2012-04-04 | 2013-03-08 | A dye-sensitized solar cell module having a serial structure and a method for manufacturing the solar cell |
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US (2) | US9607773B2 (en) |
EP (1) | EP2834823B1 (en) |
JP (1) | JP5749875B2 (en) |
KR (1) | KR101600740B1 (en) |
CN (1) | CN104246935B (en) |
AU (1) | AU2013242931B2 (en) |
BR (1) | BR112014024936B1 (en) |
CA (1) | CA2866778C (en) |
ES (1) | ES2689409T3 (en) |
HK (1) | HK1205347A1 (en) |
MX (1) | MX2014012017A (en) |
RU (1) | RU2609672C2 (en) |
SE (1) | SE537669C2 (en) |
WO (1) | WO2013149787A1 (en) |
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Also Published As
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HK1205347A1 (en) | 2015-12-11 |
ES2689409T3 (en) | 2018-11-13 |
MX2014012017A (en) | 2014-11-10 |
SE537669C2 (en) | 2015-09-29 |
BR112014024936A2 (en) | 2017-09-19 |
CA2866778A1 (en) | 2013-10-10 |
CA2866778C (en) | 2019-05-07 |
RU2609672C2 (en) | 2017-02-02 |
BR112014024936A8 (en) | 2018-01-02 |
US20150083182A1 (en) | 2015-03-26 |
KR20140139128A (en) | 2014-12-04 |
CN104246935B (en) | 2016-12-21 |
EP2834823B1 (en) | 2018-07-18 |
SE1230033A1 (en) | 2013-10-05 |
US9607773B2 (en) | 2017-03-28 |
JP5749875B2 (en) | 2015-07-15 |
ZA201406790B (en) | 2020-02-26 |
BR112014024936B1 (en) | 2021-07-20 |
CN104246935A (en) | 2014-12-24 |
EP2834823A1 (en) | 2015-02-11 |
AU2013242931A1 (en) | 2014-10-09 |
KR101600740B1 (en) | 2016-03-07 |
RU2014144301A (en) | 2016-05-27 |
US10490359B2 (en) | 2019-11-26 |
JP2015518652A (en) | 2015-07-02 |
AU2013242931B2 (en) | 2016-12-08 |
US20170047171A1 (en) | 2017-02-16 |
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