Process for preparing anatase type nano crystal TiO2 solar energy cell material

A solar cell and anatase-type technology, applied in circuits, electrical components, titanium dioxide, etc., can solve the problems of slow electron transfer, affecting the photoelectric conversion efficiency of dye-sensitized solar cells, and affecting the photoelectric performance of solar cells

Inactive Publication Date: 2006-06-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The research of N.G.Park et al. in "J.Phys.Chem." B, 2000, 104, 8989 shows that the electron transport of rutile titanium dioxide is slow, and its existence will affect the photoelectric conversion efficiency of dye-sensitized solar cells
[0004] At present, nano-TiO in dye-sensitized solar cells 2 The material is usually prepared by titanate hydrolysis, under acidic conditions such as sol-gel in nitric acid solution and hot-pressing treatment. The nano-TiO obtained by this preparation method 2 Often impure, containing a certain amount of TiO with rutile and brookite structures 2 , and the presence of rutile ore will affect the photoelectric performance of solar cells

Method used

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  • Process for preparing anatase type nano crystal TiO2 solar energy cell material
  • Process for preparing anatase type nano crystal TiO2 solar energy cell material
  • Process for preparing anatase type nano crystal TiO2 solar energy cell material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Isopropyl titanate was added dropwise to deionized water cooled to 0° C. with ice water to obtain a white precipitate. After separation and washing, the precipitate is transferred to tetramethylammonium hydroxide solution, wherein the concentration of tetramethylammonium hydroxide is controlled by the molar ratio of isopropyl titanate and tetramethylammonium hydroxide at 62.5:1, under stirring Reflux at 100°C to obtain a colloidal solution. The above colloid was transferred to a high-pressure tank lined with polytetrafluoroethylene, kept at 210°C for 12 hours, centrifuged to remove alkali, and dried to obtain anatase titanium dioxide nanocrystals with a particle size of 14nm.

Embodiment 2

[0022] Tetrabutyl titanate was added dropwise into deionized water at 20° C. to obtain a white precipitate. After separation and washing, the precipitate is transferred to the solution of tetraethylammonium hydroxide, wherein the concentration of tetraethylammonium hydroxide is controlled by the molar ratio of tetrabutyl titanate to tetramethylammonium hydroxide as 62.5:4, and the Reflux at 120°C to obtain a colloidal solution. The above colloid was transferred to a high-pressure tank lined with polytetrafluoroethylene, kept at 230°C for 24 hours, centrifuged to remove alkali, and dried to obtain anatase titanium dioxide nanocrystals with a particle size of 30nm.

Embodiment 3

[0024] Isopropyl titanate was added dropwise to deionized water at 15 °C to obtain a white precipitate. After separation and washing, the precipitate is transferred to the solution of tetramethylammonium hydroxide, wherein the concentration of tetramethylammonium hydroxide is controlled by the molar ratio of isopropyl titanate and tetramethylammonium hydroxide at 750:1, and the Reflux at 100°C to obtain a colloidal solution. The above colloid was transferred to a high-pressure tank lined with polytetrafluoroethylene, kept at 190° C. for 4 hours, centrifuged to remove alkali, and dried to obtain anatase titanium dioxide nanocrystals with a particle size of 8 nm.

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Abstract

A process for preparing anatase-type TiO2 nano-crystals used for dye-sensitive solar cell, photocatalyst, photo-cleaning material and gas-sensitive material includes such steps as hydrolyzing titanate to obtain deposit, washing, adding it to the aqueous solution of quaternary ammonium alkali, thermal reflux to obtain sol, and holding 190-230 deg.C in a sealed teflon container.

Description

technical field [0001] The invention relates to a nanocrystalline TiO 2 A method for preparing a solar cell material, in particular to an anatase-type nanocrystalline TiO 2 Preparation method of solar cell material. The invention belongs to the field of solar cell material preparation and application. Background technique [0002] The rapid development of society has made the resource and energy crisis increasingly prominent, and the development of pollution-free and renewable new energy has become an important task of scientific and technological research. Solar energy, as a new type of renewable energy, does not release a large amount of carbon dioxide gas and cause the "greenhouse effect" like conventional energy sources, so it has broad application prospects. At present, solar cells are one of the most effective ways to develop and utilize solar energy. Because the preparation of inorganic solar cells such as silicon is relatively complicated, the production cost rem...

Claims

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Application Information

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IPC IPC(8): C01G23/053H01L31/032H01L31/18
CPCY02P70/50
Inventor 周保学熊必涛蔡俊葛伟杰郑青蔡伟民
Owner SHANGHAI JIAO TONG UNIV
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