Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same

A technology of solar cells and oxide layers, which is applied in the direction of secondary batteries, final product manufacturing, sustainable manufacturing/processing, etc., can solve problems such as reduced charge transfer efficiency, irregular crystal planes, and reduced electron transfer capabilities, and achieve improved Effect of high photoelectric conversion efficiency and porosity

Inactive Publication Date: 2009-04-01
KOREA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008]In addition, if the porosity is increased by reducing the density of the porous titanium oxide layer, the specific surface area will increase, and the amount of dye adsorption will increase accordingly, but due to the interparticle resistance increases, the charge transport efficiency decreases, and if the density of the titanium oxide layer is increased, the porosity is decreased, and the amount of dye adsorption decreases
[0009] In addition, conventional titanium oxide nanoparticles are generally used, because each crystal of the polycrystal constituting the nanoparticle is small, the crystal plane is irregular, and the electron transport ability is reduced. not sufficiently conductive
[0010] Therefore, to maximize the light absorption of solar cells with a titanium oxide layer composed of conventional titanium oxide nanoparticles, thereby greatly improving the photoelectric conversion efficiency, and limitation

Method used

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  • Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same
  • Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same
  • Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] At room temperature, 60 g of isopropyl titanate was slowly added to a polymer solution prepared by dissolving 20 g of polyvinyl acetate (PVAc, Mw500,000, product of Aldrich Company) in 350 ml of dimethylformamide. At this point, the reaction starts and becomes a suspension due to the moisture in the solvent. Next, 24 g of acetic acid was slowly added dropwise as a reaction catalyst. At this point, the suspension turned into a clear solution as the reaction progressed. The prepared spinning solution was electrospun into titanium oxide fibers within 24 hours after preparation.

[0124] Electrospinning utilizes the image 3 In the electrospinning device shown, a transparent conductive substrate (10cm×10cm) coated with FTO is used as a grounded receiver, a metal needle connected to a pump with adjustable discharge speed is used as a positive electrode, and 15KV is connected between the two electrodes voltage. Adjust the discharge speed of the spinning solution to 10 μl / ...

Embodiment 2

[0134] With 20g polyvinyl acetate (PVAc, Mw 500,000, Aldrich company product), 60g isopropyl titanate, 24g acetic acid, 350ml dimethylformamide, after making spinning solution according to the method identical with embodiment 1, with The spinning solution was electrospun onto a transparent conductive substrate (10cm×10cm size) coated with FTO at a discharge speed of 20 μl / min, and the total discharge volume reached 5000μl, 6000μl, 7000μl, 9000μl and 10000μl, respectively, to produce With different thickness PVAc / TiO 2 Composite fiber layer substrate. Then they were pressurized with a pressure of about 1.5 tons at 120°C for 10 minutes in the same manner as in Example 1 to adjust the final thickness to 14 μm, and then sintered at 500°C for 30 minutes to remove polymers while An anatase-type titanium oxide nanoparticle layer is formed. The porosity and dye adsorption capacity of their titanium oxide layers are shown in Table 5 below.

[0135] 【table 5】

[0136]

[0137] Th...

Embodiment 3

[0141] With 20g polyvinyl acetate (PVAc, Mw 500,000, Aldrich company product), 60g isopropyl titanate, 24g acetic acid, 350ml dimethylformamide, after making spinning solution according to the method identical with embodiment 1, with The spinning solution was electrospun onto an FTO-coated transparent conductive substrate (10 cm × 10 cm in size) at a discharge speed of 20 μl / min to form PVAc / TiO 2 Composite fiber layer. They were then sintered at 500°C for 30 minutes at 500°C after pressurizing them at 120°C with a pressure of about 1.5 tons in the same manner as in Example 1, thereby forming anatase-type titanium oxides with different thicknesses while removing macromolecules. nanoparticle layer. The porosity and dye adsorption capacity of their titanium oxide layers are shown in Table 7 below.

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Abstract

This invention refers to a dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same. The inventive dye-sensitized solar cell having improved photoelectric conversion characteristic comprises a metal oxide layer with high porosity and dye adsorption amount which is composed of dye-adsorbed metal oxide nanoparticles, wherein the metal oxide nanoparticles are formed by electrospinning a mixed solution of a metal oxide precursor and a polymer into ultrafine composite fibers, and thermally compressing and sintering the ultrafine composite fibers.

Description

technical field [0001] The present invention relates to a dye-sensitized solar cell and a manufacturing method thereof that improve photoelectric conversion characteristics by simultaneously increasing the porosity and dye adsorption capacity of a metal oxide layer. Background technique [0002] Since the Gratzel research group in Switzerland first published the dye-sensitized solar cell (B. O'Regan, M. Gratzel, Nature 353, 737 (1991)), related research has been carried out very extensively. [0003] The dye-sensitized solar cell developed by Gratzel et al., as shown in the figure, utilizes a photosensitive dye that can absorb visible light to generate electron-hole pairs (electron-hole pairs) and nanocrystalline titanium oxide particles that can transfer photogenerated electrons. material semiconductor electrodes. Specifically, the electrons excited by visible light in the dye are transferred to the n-type semiconductor-titanium oxide particles, and passed through the "I" ...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042H01M10/36H01M14/00H01L31/04H01L31/18B82Y20/00
CPCH01G9/2059H01G9/2031Y02E10/542Y02P70/50H01L31/04H01L31/18
Inventor 赵城戊金东英张盛然朴南圭李秉洪
Owner KOREA INST OF SCI & TECH
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