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Dye-sensitized nanocrystalline titanium dioxide photo anode and preparation method and application

A technology of titanium dioxide and dye sensitization, applied in the field of photoanode, can solve the problems of unfavorable photoelectric conversion efficiency of batteries and weak absorption of visible light, and achieve the effects of improving photoelectric conversion efficiency of batteries, increasing the probability of absorption and simple preparation.

Inactive Publication Date: 2011-07-13
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide thin films coated solely by titanium dioxide nanoparticles have weak absorption of long-wavelength visible light, which is not conducive to improving the photoelectric conversion efficiency of batteries.

Method used

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  • Dye-sensitized nanocrystalline titanium dioxide photo anode and preparation method and application
  • Dye-sensitized nanocrystalline titanium dioxide photo anode and preparation method and application
  • Dye-sensitized nanocrystalline titanium dioxide photo anode and preparation method and application

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Embodiment 1

[0026] Embodiment 1: 300nm carbon sphere (see figure 1 shown) obtained from 1M glucose for 4 h at 180°C by hydrothermal treatment. Rotate and separate, dry in an oven at 60 ° C for 12 hours, then dissolve 0.3 g of the carbon spheres in distilled water (the concentration of the colloidal carbon sphere solution is 0.04 g / ml), and then mix with the titanium dioxide slurry prepared by the colloidal gel method after high-power ultrasound (the slurry concentration is 0.082g / ml, containing 2g of titanium dioxide nanoparticles) blended, and then stirred for 1 hour, and then coated on the conductive glass with a film thickness of about 12 μm. The conductive glass coated with the film was calcined in a muffle furnace at 450° C. for 2 hours to obtain the photoanode of the dye-sensitized nanocrystalline solar cell. The photoanode was soaked in a concentration of 5×10 -4 mol / L N3 solution for 24h, the photoanode is fully sensitized by the dye. Then the photoanode was docked with the pla...

Embodiment 2

[0027] Embodiment 2: 500nm carbon spheres (see figure 2 shown) was obtained by 0.75M glucose for 8h, 180°C hydrothermally. Rotate and separate, dry in an oven at 60 ° C for 12 hours, then dissolve 0.3 g of the carbon spheres in distilled water (the concentration of the colloidal carbon sphere solution is 0.035 g / ml), and then mix with the titanium dioxide slurry prepared by the colloidal gel method after high-power ultrasound (slurry concentration is 0.085g / ml, containing 1.8g of titanium dioxide nanoparticles), and then stirred for 1h, then coated on the conductive glass, the film thickness is about 12μm. The conductive glass coated with the film was calcined in a muffle furnace at 450° C. for 2 hours to obtain the photoanode of the dye-sensitized nanocrystalline solar cell. There are many porous structures left on the surface, such as Figure 4 shown. The photoanode was soaked in a concentration of 5×10 -4 mol / L N3 solution for 24h, the photoanode is fully sensitized by...

Embodiment 3

[0028] Embodiment 3: 700nm carbon sphere (see image 3 shown) was obtained by hydrothermal treatment at 180° C. for 8 h with 1 M glucose. Rotate and separate, dry in an oven at 60 ° C for 12 hours, then dissolve 0.3 g of the carbon spheres in distilled water (the concentration of the colloidal carbon sphere solution is 0.045 g / ml), and mix with the titanium dioxide slurry prepared by the colloidal gel method after high-power ultrasound (slurry concentration is 0.078g / ml, containing 1.8g of titanium dioxide nanoparticles), and then stirred for 1h, then coated on the conductive glass, the film thickness is about 12μm. The conductive glass coated with the film was calcined in a muffle furnace at 450° C. for 2 hours to obtain the photoanode of the dye-sensitized nanocrystalline solar cell. The photoanode was soaked in a concentration of 5×10 -4 mol / L N3 solution for 24h, the photoanode is fully sensitized by the dye. Then the photoanode was docked with the platinum counter elec...

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Abstract

The invention relates to a dye-sensitized nanocrystalline titanium dioxide photo anode comprising a transparent conducting substrate and a coating film which is coated on the transparent conducting substrate. The coating film contains titanium dioxide nanometer particles; and the dye-sensitized nanocrystalline titanium dioxide photo anode is characterized in that the surface of the coating film is provided with spherical hole structures left after the calcination of carbon balls. The invention further discloses a preparation method and application of the photo anode. Compared with the prior art, the invention has the advantages of increasing the propagation paths of light in titanium dioxide films, increasing the scattering performance of the photo anode, improving the absorption ratio oflight by the titanium dioxide films as the colloid carbon balls are used as the template and form spherical hole structures in the titanium dioxide photo anode and improving the utilization efficiency of incident light by the photo anode, and is helpful to improve the photoelectric transformation efficiency of a battery.

Description

technical field [0001] The invention relates to a photoanode of a dye-sensitized nanocrystalline solar cell, and also relates to a preparation method thereof. The invention also discloses the application of the photoanode in a solar cell. Background technique [0002] Dye-sensitized solar cells, a photovoltaic cell with a porous titanium dioxide nanostructure photoanode sensitized by carboxylic acid bipyridyl nail complexes, have brought revolutionary innovations to the development of photoelectrochemical cells, with high photoelectric conversion efficiency and far lower prices than In traditional semiconductor solar cells, the titanium dioxide nanostructured photoanode mainly includes a transparent conductive substrate and a titanium dioxide nanoparticle coating film coated thereon, and the transparent conductive substrate is often made of conductive glass. For the technical literature in this aspect, please refer to the Chinese Invention Application Publication "Preparatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01G9/04H01G9/20H01M14/00H01L51/44H01L51/48
CPCH01G9/2059Y02E10/542H01G9/2031
Inventor 诸跃进杨广涛张京王培卿张延伟
Owner NINGBO UNIV
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