Method for preparing nano TiO2 (titanium dioxide) pastes

A slurry and nanotechnology, applied in the field of solar cells, can solve problems such as high sintering temperature, difficult packaging, deformation of electric glass substrates, etc., and achieve the effects of improving battery performance, increasing surface roughness, and increasing short-circuit current

Inactive Publication Date: 2011-11-02
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common method of preparing titanium dioxide paste for dye-sensitized solar cells is to mix titanium dioxide powder (P25 powder) with organic carrier materials, and then sinter at about 500°C for half an hour to form a thin film. This method has a higher sintering temperature and is easier It leads to deformation of the conductive glass substrate and makes packaging difficult, especially when preparing large-area batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Weigh 1 part by mass of isopropyl titanate and add it to 6 parts by mass of ethylene glycol, heat the mixed solution to 90° C., add 4 parts by mass of citric acid, and stir magnetically for 6 hours to form a titanium dioxide sol. Then add 2 parts by mass of P25 powder and 0.2 parts by mass of PEO, mix and grind to make a slurry for use. The above slurry was sintered at 300° C. for half an hour to form a nanocrystalline film.

Embodiment 2

[0011] Weigh 1 part by mass of isopropyl titanate and add it to 4 parts by mass of ethylene glycol, heat the mixed solution to 90° C., add 2 parts by mass of citric acid, and stir magnetically for 12 hours to form a titanium dioxide sol. Then add 4 parts by mass of P25 powder and 0.8 parts by mass of PEG, mix and grind to make a slurry for use. The above slurry was sintered at 300° C. for half an hour to form a nanocrystalline film.

Embodiment 3

[0013] Weigh 1 part by mass of isopropyl titanate and add it to 2 parts by mass of ethylene glycol, heat the mixed solution to 90° C., add 2 parts by mass of citric acid, and stir magnetically for 24 hours to form a titanium dioxide sol. Then add 2 parts by mass of P25 powder and 0.4 parts by mass of PVP, mix and grind to make a slurry for use. The above slurry was sintered at 300° C. for half an hour to form a nanocrystalline film.

[0014] The particle size of titanium dioxide nanoparticles prepared by sol-gel method is less than 20 nanometers. After mixing P25 powder (the particle size of nano titanium dioxide particles is concentrated around 20nm), due to the existence of a certain particle size distribution gradient between different particles, the formed film has The large surface area is much larger than the film prepared by pure P25 powder, which is beneficial to increase the adsorption amount of dye and improve the short-circuit current of the battery; in addition, du...

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Abstract

The invention provides a method for preparing nano TiO2 (titanium dioxide) pastes, and is characterized by comprising the following steps in percentage by weight: adding one part of tetraisopropyl titanate to 2-6 parts of ethylene glycol; heating the mixed solution to 90 DEG C; adding 2-4 parts of citric acid; stirring for 6-24 hours magnetically to form TiO2 sols; adding 2-4 parts of P25 powdersand 0.2-0.8 part of pore forming material; and mixing and grinding to prepare the pastes. The method has the advantage of low sintering temperature and is convenient to package a battery.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a method for preparing nano-TiO2 slurry suitable for dye-sensitized solar cells. Background technique [0002] TiO 2 It is an n-type semiconductor with a band gap of 3.2eV, which is chemically stable and completely harmless to the human body. In addition to the general colloid effect, nano-titanium dioxide also has photoelectric conversion, ultraviolet absorption, catalysis and antibacterial effects, and can be used in many fields, such as: using the photocatalysis of nano-titanium dioxide for sewage treatment; making use of its anti-ultraviolet properties Skin care cosmetics; dye-sensitized solar cells developed by utilizing the photoelectric conversion properties of nano-titanium dioxide have become the most promising third-generation solar cells. At present, the common method of preparing titanium dioxide paste for dye-sensitized solar cells is to mix titanium dioxide po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/08H01G9/042H01G9/20H01M14/00H01L51/48
CPCY02E10/549Y02E10/50Y02P70/50
Inventor 姜春华李德娜
Owner IRICO
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