Preparation method of tungsten sulfide doped conductive polythiophene counter electrode used for dye-sensitized solar cell

A technology for solar cells and dye sensitization, which is applied in the field of preparation of conductive polythiophene counter electrodes, can solve the problems of high cost and complicated polymer film process, and achieve the effects of low cost, simple device and mild conditions

Inactive Publication Date: 2018-09-04
FUZHOU UNIV
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Problems solved by technology

[0010] The object of the present invention is to provide a preparation method for the counter electrode of a dye-sensitized solar cell, by doping an inorganic compound to improve the efficiency of the conductive polymer counter electrode, thereby improving the light conversion efficiency of the dye-sensitized solar cell, while overcoming the existing There are problems such as complex process and high cost for preparing polymer membranes in existing technologies

Method used

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  • Preparation method of tungsten sulfide doped conductive polythiophene counter electrode used for dye-sensitized solar cell
  • Preparation method of tungsten sulfide doped conductive polythiophene counter electrode used for dye-sensitized solar cell
  • Preparation method of tungsten sulfide doped conductive polythiophene counter electrode used for dye-sensitized solar cell

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preparation example Construction

[0037] Preparation of photoanode

[0038] The photoanode (the total thickness of the titanium dioxide film is 16 μm, including a 20 nm granular titanium dioxide layer with a thickness of 12 μm, and a 200 nm granular titanium dioxide layer with a thickness of 4 μm) was prepared on the FTO glass by screen printing technology, and the prepared The photoanode was immersed in an ethanol solution of N719 dye at a concentration of 0.3 mM, and placed in the dark for 24 h, so that the dye was sensitized and adsorbed on the titanium dioxide photoanode. After the sensitization treatment is completed, take it out and clean it with absolute ethanol, and let it dry naturally before use.

[0039] Electrolyte

[0040] The electrolyte composition is 0.1 M LiI, 0.05 M I 2 , 0.3 M DMPII (1,2-dimethyl-3-propylimidazolium iodide) and 0.5 M tert-butylpyridine in acetonitrile.

Embodiment 1

[0042] (1) Install the cleaned FTO conductive glass on the working electrode, and the conductive surface is in close contact with the platinum sheet. Put 20 mL of 0.1 M lithium perchlorate / acetonitrile dissolved in 0.1 mmol ammonium tetrathiotungstate and 0.94 mmol EDOT In the solution, immerse about 2 / 3, insert the platinum auxiliary electrode and the silver-silver chloride reference electrode to form a three-electrode system, connect the circuit, and prepare for deposition.

[0043] (2) A conductive polymer film doped with tungsten sulfide was prepared on the conductive surface of FTO glass by electrodeposition.

[0044] (3) The technical parameters set by the deposition method are as follows: use adhesive tape to set the working area of ​​the working electrode to 0.385cm 2 , set the potential applied to the working electrode as 1.5 V, the deposition time as 30 s, and other default values.

[0045] (4) After the deposition, the FTO glass is taken out to obtain a conductive ...

Embodiment 2

[0047] (1) Install the cleaned FTO conductive glass on the working electrode, and the conductive surface is in close contact with the platinum sheet. Put 20 mL of 0.1 M lithium perchlorate / acetonitrile dissolved in 0.1 mmol ammonium tetrathiotungstate and 0.94 mmol EDOT In the solution, immerse about 2 / 3, insert the platinum auxiliary electrode and the silver-silver chloride reference electrode to form a three-electrode system, connect the circuit, and prepare for deposition.

[0048] (2) A conductive polymer film doped with tungsten sulfide was prepared on the conductive surface of FTO glass by electrodeposition.

[0049] (3) The technical parameters set by the deposition method are as follows: use adhesive tape to set the working area of ​​the working electrode to 0.385cm 2 , set the potential applied to the working electrode as 1.5 V, the deposition time as 70 s, and other default values.

[0050] (4) After the deposition, the FTO glass is taken out to obtain a conductive ...

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Abstract

The invention provides a composite counter electrode used for a dye-sensitized solar cell and a preparation method thereof. The composite counter electrode is composed of a conductive substrate and catalytic material. The preparation process is listed as follows: the conductive substrate is put in a lithium perchlorate/acetonitrile solution of ammonium tetrathiotungstate and 3,4-ethylenedioxythiophene to act as a working electrode and form a three-electrode system with a platinum auxiliary electrode and a silver-silver chloride reference electrode, then a tungsten sulfide doped conductive polythiophene film is deposited on the conductive substrate by using the electrochemical method under the mild condition, and finally the tungsten sulfide doped conductive polythiophene counter electrodehaving high catalytic performance is obtained. The composite counter electrode is prepared by using direct electrochemical deposition so that the preparation process is simple, operation is convenient, the composite counter electrode is suitable for mass production without any post-processing and can be directly applied to the dye-sensitized solar cell, the energy conversion efficiency better thanthat of the Pt counter electrode can be acquired and photoelectric conversion of the formed cell can be 7.56%.

Description

technical field [0001] The invention relates to a preparation method of a conductive polythiophene counter electrode doped with tungsten sulfide. It belongs to the field of material preparation. Background technique [0002] Due to the limited fossil energy resources such as oil, coal, and natural gas, and their use will bring serious environmental problems, it is imperative to develop renewable new energy. Among them, solar energy has become the research focus of researchers due to its advantages such as abundant resources and unique development potential. It is estimated that the sun can deliver 8×10 radiant energy to the earth per second 13 kW, equivalent to 1.892×10 16 The combustion heat of t coal, so the rational opening and utilization of solar energy is of great significance for today's energy issues. One of the advanced utilization methods of solar energy is to convert light energy into electrical energy through solar cell equipment, so how to prepare convenie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2022Y02E10/542Y02P70/50
Inventor 钱兴刘宏宇吴伟敏
Owner FUZHOU UNIV
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