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Dye-sensitized solar cell photoanode, its preparation method and application

A technology of solar cells and dye sensitization, applied in the field of solar cells, can solve problems such as poor photoelectric performance, achieve good industrial application prospects, simple process, and good photoelectric performance

Inactive Publication Date: 2017-04-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to address the problem of poor photoelectric performance of tungsten trioxide as a DSSC photoanode, to provide a dye-sensitized solar cell photoanode that improves the photoelectric performance of tungsten trioxide as a DSSC photoanode, its preparation method and application

Method used

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  • Dye-sensitized solar cell photoanode, its preparation method and application
  • Dye-sensitized solar cell photoanode, its preparation method and application

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preparation example Construction

[0025] A method for preparing a photoanode of a dye-sensitized solar cell, comprising the steps of,

[0026] Step S1: heat-treating the dopant and tungsten trioxide in acid to obtain a powder, wherein the dopant is an oxide of metal M or a salt of metal M, and the metal M can be dissolved in the acid into the lattice of tungsten trioxide and the atomic orbitals of the metal M and W 5d Orbitals can be hybridized.

[0027] In particular, the metal M is selected from at least one of alkaline earth metal elements and transition metal elements. Preferably, the metal M is at least one selected from hafnium, strontium and cobalt.

[0028] Preferably, the dopant is an oxide of metal M. More preferably, the oxide of metal M is hafnium oxide (HfO 2 ), strontium oxide (SrO) and cobalt oxide (CoO).

[0029] In particular, the molar ratio of dopant to tungsten trioxide is 5˜50:100.

[0030] In particular, the acid is at least one of sulfuric acid and nitric acid. Preferably, concent...

Embodiment 1

[0052] Dissolve 7.5g ammonium metatungstate in 6.0mL water to obtain ammonium metatungstate solution, dissolve 2g polyvinylpyrrolidone in 15.0mL water to obtain polyvinylpyrrolidone solution, dissolve 4g polyethylene glycol 1000 in water to obtain polyethylene glycol solution. The ammonium metatungstate solution was added to the polyvinylpyrrolidone solution, ultrasonicated for 15 minutes, then stirred at room temperature for 2 hours, then polyethylene glycol solution was added, and stirred at room temperature for 2 hours to obtain a sol. Dry the sol at 80°C, then calcinate at 600°C for 1 hour, and obtain tungsten trioxide after cooling.

[0053] Dissolve and disperse 31.78mg of hafnium oxide in 50mL of concentrated sulfuric acid (ice bath), then add 0.35g of tungsten trioxide and stir at room temperature for 10min, then transfer to a reaction kettle and react at 100°C for 12h. After cooling, centrifuge and wash with deionized water and ethanol three times, and dry at 120° C....

Embodiment 2

[0057] Dissolve 7.5g ammonium metatungstate in 6.0mL water to obtain ammonium metatungstate solution, dissolve 1g polyvinylpyrrolidone in 15.0mL water to obtain polyvinylpyrrolidone solution, dissolve 6g polyethylene glycol 1000 in water to obtain polyethylene glycol solution. The ammonium metatungstate solution was added to the polyvinylpyrrolidone solution, ultrasonicated for 15 minutes, then stirred at room temperature for 2 hours, then polyethylene glycol solution was added, and stirred at room temperature for 2 hours to obtain a sol. The sol was dried at 100°C, then calcined at 500°C for 2 hours, and tungsten trioxide was obtained after cooling.

[0058] Dissolve and disperse 62.53mg of strontium oxide in 50mL of 3M nitric acid (ice bath), then add 0.35g of tungsten trioxide and stir at room temperature for 20min, then transfer to a reaction kettle and react at 150°C for 8h. After cooling, centrifuge and wash with deionized water and ethanol three times, and dry at 200° ...

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Abstract

The invention discloses a dye-sensitized solar cell photo-anode and a preparing method and application of the dye-sensitized solar cell photo-anode. The preparing method of the dye-sensitized solar cell photo-anode includes the following steps that heat treatment is carried out on a dopant and tungsten trioxide in acid to prepare powder, wherein the dopant is oxide or salt of metal M, the metal M can enter lattices of the tungsten trioxide after being dissolved in the acid, and the atomic orbital and the W5d orbital of the metal M can be hybridized; slurry is prepared from the powder; the surface of a conducting substrate is coated with the slurry to prepare the dye-sensitized solar cell photo-anode. The preparing method is simple in technology, and the prepared dye-sensitized solar cell photo-anode is applied to a dye-sensitized solar cell and has good photoelectric performance and good industrialization application prospects.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a photoanode of a dye-sensitized solar cell, a preparation method and application thereof. Background technique [0002] Dye-sensitized solar cells (DSSCs) have become one of the important technologies that can alleviate the energy crisis due to their low cost, simple preparation method, and relatively high photoelectric conversion efficiency. A typical DSSC device is usually a sandwich structure, metal oxide semiconductors such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), tungsten trioxide (WO 3 ) is loaded on the conductive glass as the working electrode, which absorbs the dye and transfers electrons; the platinum (Pt) film is used as the counter electrode; the electrolyte solution diffuses between the two electrodes to regenerate the electrons in the dye. Since the invention of dye-sensitized solar cells by Michael Grtzel in 1991, DSSCs have attracted the attention of researche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20
CPCY02E10/542
Inventor 李洁刘洋李文章
Owner CENT SOUTH UNIV
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