WO2009036607A1 - Pile solaire sensible à la couleur et structure d'électrode de travail de cette pile - Google Patents

Pile solaire sensible à la couleur et structure d'électrode de travail de cette pile Download PDF

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Publication number
WO2009036607A1
WO2009036607A1 PCT/CN2007/002797 CN2007002797W WO2009036607A1 WO 2009036607 A1 WO2009036607 A1 WO 2009036607A1 CN 2007002797 W CN2007002797 W CN 2007002797W WO 2009036607 A1 WO2009036607 A1 WO 2009036607A1
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WO
WIPO (PCT)
Prior art keywords
conductive substrate
dye
solar cell
porous
working electrode
Prior art date
Application number
PCT/CN2007/002797
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English (en)
Chinese (zh)
Inventor
Dechun Zou
Xing Fan
Rong Jian
Original Assignee
Peking University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peking University filed Critical Peking University
Priority to PCT/CN2007/002797 priority Critical patent/WO2009036607A1/fr
Publication of WO2009036607A1 publication Critical patent/WO2009036607A1/fr

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Classifications

    • 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
    • H01G9/2095—Light-sensitive devices comprising a flexible sustrate
    • 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

  • a dye-sensitized solar cell is mainly composed of a working electrode, an electrolyte layer, and a counter electrode; wherein the electrolyte layer may be solid or liquid.
  • the working electrode comprises a conductive substrate, a porous film of a semiconductor material and a sensitizing dye.
  • the conductive substrate is usually a glass substrate coated with a transparent conductive layer, or a transparent plastic film coated with a transparent conductive layer, such as ITO-PET, ITO-PEN film, etc. .
  • the purpose of using a transparent electrode is to allow sunlight to enter the inside of the battery to be absorbed by the dye while ensuring conductivity.
  • the working electrode it is generally required to carry out the sintering treatment at a high temperature of 400 ° C - 50 (TC), but a high sintering temperature lowers the conductivity of the transparent electrode and even deforms the glass substrate.
  • TC ° C - 50
  • a method of changing the composition of the transparent conductive film or adding various protective films may be employed, but the effect has been proved to be very limited.
  • a conductive plastic substrate such as ITO-PET or ITO-PEN has to be selected.
  • the sintering temperature is generally not higher than 200 ° C, and the semiconductor porous film is not obtained.
  • Optimal processing temperature for high performance Dye-sensitized solar cells pose greater difficulties.
  • a dye-sensitized solar cell working electrode structure comprising a porous conductive substrate and a sensitized semiconductor material layer, wherein the sensitized semiconductor layer is a porous structure composed of semiconductor particles of different sizes, which is attached to the surface of the conductive substrate, and Filled in the pores of the conductive substrate.
  • the porous conductive substrate may be made of an organic conductive material or a metal.
  • the porous conductive substrate may be composed of a non-conductive porous substrate and a layer of a conductive material, and a layer of a conductive material is coated on the surface of the non-conductive porous substrate.
  • a layer of dense semiconductor material can be applied to the porous conductive substrate.
  • the porous electrically conductive substrate can be a wire mesh.
  • the mesh has a pore size of no more than 1 ⁇ .
  • a dye-sensitized solar cell comprising: a working electrode, an electrolyte layer and a counter electrode, the working electrode comprising: a porous conductive substrate and a sensitized semiconductor layer, wherein the sensitized semiconductor layer is a porous structure composed of semiconductor particles of different sizes, It is attached to the surface of the conductive substrate and filled in the pores of the conductive substrate.
  • the thickness of the porous conductive substrate may be no greater than lfflm
  • the thickness of the sensitized semiconductor material particles attached to the conductive substrate may range from 1 micron to 100 microns.
  • the working electrode of the dye-sensitized solar cell comprises a porous structure of a conductive substrate, the sensitized semiconductor layer is attached to the surface of the conductive substrate and filled in the pores of the conductive substrate, and the conductive substrate of the porous structure has high temperature resistance.
  • the invention has high conductivity and flexibility, and the invention can greatly improve the conductivity of the electrode, reduce the cost of the battery, and improve the stability of the battery.
  • FIG. 1 is a schematic structural view of a working electrode of a dye-sensitized solar cell of the present invention
  • FIG. 2 is a cross-sectional view of FIG. 1 taken from A-A;
  • Figure 3 is a cross-sectional view of Figure 1 taken from B - B;
  • a network-like conductive substrate a 2-sensitized semiconductor layer.
  • BEST MODE FOR CARRYING OUT THE INVENTION A specific embodiment of the present invention is described below.
  • a stainless steel wire mesh having a wire diameter of 25 ⁇ m and a mesh size of about 500 mesh is used as a porous conductive substrate; the maximum thickness of the stainless steel wire mesh is 57.
  • the size of the micron is about 28 ⁇ 28 ⁇ m 2 ; the effective area of the screen for preparing the working electrode is 1 cm 2 , and the specific preparation process of the working electrode is as follows:
  • the prepared wire mesh is first washed with an organic solvent such as acetone, and then cleaned with a substrate cleaning agent. Wash, burn at 400 ° C - 500 Torr for 15 minutes, naturally cool at room temperature; place the burned net, placed in a solution of tetraethyl titanate / acetylacetone in ethanol for 30 seconds, remove and use infrared
  • the micron semiconductor material Ti0 2 dense layer is obtained on the screen to obtain a thickness of about 0.9 micron semiconductor material Ti0 2 dense layer.
  • a dye-sensitized solar cell on a dense layer usually a semiconductor material Ti0 2 emulsion, and then sintering at 500 degrees for 30 minutes, repeating the above spraying and sintering process twice, the total thickness of the semiconductor material Ti0 2 layer on the screen It reaches 8-15 microns.
  • the sintered electrode with the semiconductor material Ti0 2 was sensitized in a N 3 dye/ethanol solution having a concentration of 3 10" 4 mole/L for more than 12 hours, and taken out and air-dried at room temperature. Referring to Fig. 2, Fig. 3, sensitization
  • the semiconductor layer is a porous structure composed of semiconductor particles of various sizes attached to the surface of the conductive substrate and filled in whole or in part in the pores of the conductive substrate.
  • the battery performance was tested in AMI. 5 (ASTM E892), twice the solar intensity condition; the measured result was a battery.
  • open circuit voltage was 630 mV, short circuit current density 7. 2mA / cm 2, a total energy conversion efficiency of the photoelectric 2.7%.
  • the preparation method of the sensitized semiconductor layer in the working electrode structure of the dye-sensitized solar cell is: spraying and sintering the semiconductor material on the conductive substrate multiple times, and sensitizing the conductive substrate with the sintered semiconductor material in the dye can.
  • the semiconductor material is any semiconductor material suitable for the working electrode of the dye-sensitized solar cell, and the most representative one is nano-scale Ti0 2 , ZnO, and the like.
  • the size and distribution of the nanoparticles are the same as those for the conventional dye-sensitized solar cells.
  • the coating method can also be extended by the usual methods; for example, spraying, printing, soaking, pulling, scraping, and the like. All dyes suitable for conventional dye-sensitized solar cells are also suitable for sensitization of the semiconductor material of the working electrode, and the same sensitization method can be used.
  • the thickness of the sensitized semiconductor layer attached to the porous conductive substrate is between 1 ⁇ m and 100 ⁇ m.
  • the aperture is small, and the through hole occupancy rate is used.
  • High mesh structure such as wire mesh with high mesh and fine wire.
  • the apparent square resistance is ⁇ 100 ohms. 5 ⁇
  • the thickness of the porous conductive substrate should not exceed 0. 3 awake, the aperture of the grid should not exceed 0.5 awake.
  • the conductive substrate may be a wire mesh, such as a mesh-like conductive substrate made of stainless steel wire mesh, copper mesh, or the like, or a porous non-metal conductive structure such as a porous carbon film, a carbon fiber-made mesh cloth, or a porous conductive metal oxide. Things and so on. It is also possible to apply a conductive layer on a non-conductive substrate having a porous structure to form a conductive substrate having a porous structure.
  • the conductive substrate may be woven by a wire or a thread, or may be formed by punching a film by a means such as laser drilling. Or use a special material system, self-assembled by molecular under certain conditions, 'either by sintering or selectively dissolving the film of the multi-phase structure, and selectively reacting to obtain a porous structure.
  • a layer of a dense semiconductor material may be coated on the surface of the porous structure conductive substrate to prevent direct contact between the electrolyte and the metal of the working electrode.
  • the methods for preparing the dense layer include a sputtering method, a vacuum thermal evaporation method, a spray coating method, and an electrochemical method.
  • the sintering process of the semiconductor film can be performed not only at the sintering temperature with the usual glass substrate, but also under the condition optimization requirements. Perform at higher temperatures.
  • the present invention discloses a working electrode of a dye-sensitized solar cell.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Hybrid Cells (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention a pour objet une pile solaire sensible à la couleur et une électrode de travail pour cette pile. L'électrode de travail comporte un substrat conducteur poreux et une couche semi-conductrice sensible à la couleur. La couche semi-conductrice sensible à la couleur est une structure poreuse qui est constituée de particules semi-conductrices de différentes dimensions. La couche semi-conductrice sensible à la couleur recouvre le substrat conducteur poreux et remplit les pores du substrat conducteur poreux. Du fait de la conductivité et de la flexibilité supérieures du substrat conducteur, la conductivité de l'électrode peut être augmentée et le coût de fabrication de la pile solaire peut être réduit.
PCT/CN2007/002797 2007-09-21 2007-09-21 Pile solaire sensible à la couleur et structure d'électrode de travail de cette pile WO2009036607A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/002797 WO2009036607A1 (fr) 2007-09-21 2007-09-21 Pile solaire sensible à la couleur et structure d'électrode de travail de cette pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/002797 WO2009036607A1 (fr) 2007-09-21 2007-09-21 Pile solaire sensible à la couleur et structure d'électrode de travail de cette pile

Publications (1)

Publication Number Publication Date
WO2009036607A1 true WO2009036607A1 (fr) 2009-03-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1571168A (zh) * 2003-07-25 2005-01-26 鸿富锦精密工业（深圳）有限公司 太阳能电池及其电极
CN1719619A (zh) * 2004-07-08 2006-01-11 住友化学株式会社 多孔电极、包含该多孔电极的设备及其制备方法
CN1964079A (zh) * 2005-11-11 2007-05-16 三星Sdi株式会社 太阳能电池及其制造方法
JP2007172915A (ja) * 2005-12-20 2007-07-05 Kyocera Corp 光電変換装置
CN101101929A (zh) * 2006-07-07 2008-01-09 北京大学 染料敏化太阳能电池及其工作电极结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1571168A (zh) * 2003-07-25 2005-01-26 鸿富锦精密工业（深圳）有限公司 太阳能电池及其电极
CN1719619A (zh) * 2004-07-08 2006-01-11 住友化学株式会社 多孔电极、包含该多孔电极的设备及其制备方法
CN1964079A (zh) * 2005-11-11 2007-05-16 三星Sdi株式会社 太阳能电池及其制造方法
JP2007172915A (ja) * 2005-12-20 2007-07-05 Kyocera Corp 光電変換装置
CN101101929A (zh) * 2006-07-07 2008-01-09 北京大学 染料敏化太阳能电池及其工作电极结构

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XING FAN ET AL.: "Conductive mesh based flexible dye-sensitized solar cells", APPLIED PHYSICS LETTERS, 12 February 2007 (2007-02-12), pages 073501-1 - 073501-3 *

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