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Dye-sensitized solar cell

A solar cell and dye-sensitized technology, which is applied in the field of dye-sensitized solar cells, can solve the problems of reduced conversion efficiency and increased resistance of transparent conductive film 1b, and achieve the effects of avoiding reduction, avoiding conversion efficiency, and preventing corrosion

Inactive Publication Date: 2012-03-28
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when light is irradiated from the negative electrode structure 7 side as described above, the resistance of the transparent conductive film 1b becomes large, and when the battery (the minimum unit for generating electricity that functions as a battery) is enlarged, there is an internal resistance (curvature). Factor, Fill Factor; FF) and the problem that the conversion efficiency is greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] A titanium alkoxide solution was prepared by diluting with an organic solvent (butanol) so that titanium isopropoxide was 2 mol / L. A titanium dioxide microparticle paste with a solid content concentration of 20% was prepared, containing titanium dioxide particles and 20 parts by weight of the titanium alkoxide solution (general-purpose titanium dioxide particles with a particle diameter of 15 to 350 nm) based on 100 parts by weight of titanium dioxide fine particles.

[0100] In addition, the following aluminum plates treated with phosphoric acid chromate were prepared as electrode substrates.

[0101] Aluminum plate:

[0102] Thickness: 0.3mm

[0103] Chemical conversion treatment film: 50nm

[0104] The titanium dioxide paste prepared above was applied to the chemical conversion treatment film of the aluminum plate, and fired at 450° C. for 1 hour to form an oxide semiconductor porous layer (titanium oxide layer) with a thickness of 8 μm. The surface of the titaniu...

Embodiment 2

[0121] A titanium alkoxide solution (titanium isopropoxide concentration; 2 mol / L) was prepared by diluting titanium tetraisopropoxide as a binder with an organic solvent (butanol). In addition, it was confirmed by infrared absorption spectroscopic analysis (IR) that in the titanium alkoxide solution, a part of the isopropoxy group in titanium isopropoxide was substituted with a butyl group.

[0122] Add titanium dioxide microparticles (general-purpose titanium dioxide particles with a particle diameter of 15 to 350 nm), acetylacetone (dispersant), decanol (porous accelerator) and butanol / ethanol mixed solvent (mixing ratio: 50) to the titanium alkoxide solution. / 50), a dispersion process of stirring and shaking was performed to prepare an oxide semiconductor fine particle paste. Confirmed by IR. The titanium atoms in the titanium isopropoxide in this paste form chelate bonds. The composition of the paste is as follows.

[0123] Paste composition

[0124] Solid content con...

Embodiment 3

[0136] A paste for forming an oxide semiconductor layer having a solid content concentration of 20% by weight was prepared in exactly the same manner as in Example 2 except that non-acetylacetone (dispersant) and decanol (porosity promoter) were used, and the paste was used , and in exactly the same manner as in Example 2, an 8 μm thick titanium oxide layer was formed on an aluminum plate treated with phosphoric acid chromate.

[0137] Observing the surface of the titanium oxide layer with an electron microscope, it can be seen from the photo that the formed titanium oxide layer has an area of ​​10000 nm per 1 μm × 1 μm area. 2 Pores with the above size accounted for 20% of the total number of pores.

[0138] A dye-sensitized solar cell was produced in the same manner as in Example 1 except that the oxide semiconductor porous layer (titanium oxide layer) was formed as described above. The conversion efficiency of the obtained battery was measured, and the measurement area was...

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Abstract

A dye-sensitized solar cell includes a negative electrode structure (20) and an opposing electrode structure (21) having a transparent conductive substrate. The negative electrode structure (20) has ametal substrate (25) and an oxide semiconductor layer (29) having a pigment (30) formed on the metal substrate (25). A conversion treatment film (27) is formed on the surface of the metal substrate (25). The oxide semiconductor layer (29) is formed on the conversion treatment film (27). In such a solar cell, electricity is generated by light radiation from the electrode side opposing to the negative electrode structure (20). This can prevent lowering of a curvature factor (FF) and a conversion efficiency due to enlargement of the cell size. Moreover, it is possible to assure a stable conversion efficiency for a log period of time and solve the problem of the rectification wall.

Description

technical field [0001] The present invention relates to a dye-sensitized solar cell, and more specifically, to a dye-sensitized solar cell that generates electricity by irradiating light from a counter electrode (cathode) side provided to face a negative electrode. Background technique [0002] Currently, from the viewpoint of global-scale environmental problems and the depletion of fossil energy resources, expectations for photovoltaic power generation are increasing, and single-crystal and polycrystalline silicon photoelectric conversion elements are being put into practical use as solar cells. However, such solar cells have high cost and supply problems of silicone raw materials, etc., and the practical use of solar cells using materials other than silicone is expected. [0003] From the viewpoints described above, dye-sensitized solar cells have recently attracted attention as solar cells using materials other than silicone. The dye-sensitized solar cell usually has suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/042
CPCY02E10/542
Inventor 山本直嗣佐藤一弘
Owner TOYO SEIKAN KAISHA LTD
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