Preparation method of titanium dioxide dense film for dye-sensitized solar cell

A solar cell, titanium dioxide technology, applied in photosensitive equipment, circuits, capacitors, etc., can solve the problems of unsuitable large-scale industrialization, environmental pollution, and harsh process conditions, and achieve the promotion of industrialization, low cost, and improved battery performance. Effect

Inactive Publication Date: 2010-04-21
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional sol-gel method has been used in the preparation of dense titanium dioxide films for a long time. These methods use expensive titanium alkoxides. On the one hand, they contain a large amount of organic solvents, which will cause environmental pollution. , the process conditions are harsh, and it is not suitable for large-scale industrialization

Method used

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  • Preparation method of titanium dioxide dense film for dye-sensitized solar cell
  • Preparation method of titanium dioxide dense film for dye-sensitized solar cell
  • Preparation method of titanium dioxide dense film for dye-sensitized solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0017] First, mix titanyl sulfate and water at 15-20°C with a titanium ion concentration of 2 mol / L, then let it stand for 14 hours to clarify, filter and co-precipitate with 1 mol / L ammonia water and titrate until the pH value is equal to 7. The resulting white precipitate was centrifuged and washed with Ba(NO 3 ) 2 The solution had no detectable residual SO 4 2- ions, then at 60°C, press Ti 4+ : organic acid: the molar ratio of hydrogen peroxide is 1: 5: 5 to dissolve, and then the pH value of this solution is adjusted to 7 with ammonia water, and after standing for 12 hours, the aqueous titanium dioxide sol suitable for coating film is obtained; Spray on the surface of FTO glass, spin coating at 3000rpm for 20 seconds to form a film; finally vacuum dry at 60°C for 30 minutes, and heat treat at 450°C for 3 hours to obtain a dense film of nano-titanium dioxide with good crystallization.

Embodiment 2

[0019] First, mix titanyl sulfate and water at 15-20°C according to the ratio of titanium ion concentration of 1mol / L, then let it stand for 12 hours to clarify, filter and co-precipitate with 1mol / L ammonia water and titrate until the pH value is equal to 7. The resulting white precipitate was centrifuged and washed with Ba(NO 3 ) 2 The solution had no detectable residual SO 4 2- ion so far, then at 30°C, press Ti 4+ : The molar ratio of organic acid: hydrogen peroxide is 1: 2: 2 to dissolve, and then the pH value of this solution is adjusted to 7.5 with ammonia water, and after standing for 14 hours, a water-based titanium dioxide sol suitable for coating is obtained; it is sprayed On the surface of FTO glass, spin-coat at 1000 rpm for 30s to form a film; then vacuum dry at 60°C for 30min, and heat treat at 300°C for 6h to obtain a dense nano-titanium dioxide film with good crystallization.

Embodiment 3

[0021] First, mix titanyl sulfate and water at 15-20°C with a ratio of titanium ion concentration of 4mol / L, then let it stand for 18 hours to clarify, filter and co-precipitate with 1mol / L ammonia water and titrate until the pH value is equal to 7. The resulting white precipitate was centrifuged and washed with Ba(NO 3 ) 2 The solution had no detectable residual SO 4 2- ions, then at 80°C, press Ti 4+ : The molar ratio of organic acid: hydrogen peroxide is 1: 10: 10 to dissolve, and then the pH value of this solution is adjusted to 8 with ammonia water, and after standing for 16 hours, the aqueous titanium dioxide sol suitable for coating is obtained; it is sprayed On the surface of FTO glass, spin-coat at 4000 rpm for 10s to form a film; then vacuum dry at 60°C for 30min, and heat treat at 500°C for 2h to obtain a dense nano-titanium dioxide film with good crystallization.

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Abstract

In the invention, industrial-grade titanyl sulfate is used as a titanium source to prepare aqueous titanium dioxide collosol which is suitable for film coating, the titanium dioxide collosol is rotationally coated to form a film, and after high-temperature heat treatment, a high-performance nano-titanium dioxide dense film is obtained. The combination degree between the titanium dioxide film and a matrix is improved and the contact between an electrolyte with a photoanode is effectively prevented so as to reduce electronic complex. Thus, the battery performance is improved substantially, and due to low slurry cost, the industrialization process of the dye-sensitized solar cell is promoted.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide thin film used in dye-sensitized solar cells and photocatalysis-related fields, and belongs to the field of new material technology and new energy technology; Background technique [0002] Dye-sensitized solar cells have become a research hotspot in the field of solar cells due to their low cost, simple preparation process conditions and good environmental compatibility. And its core component, the titanium dioxide photoanode, plays an important role in loading sensitizers, collecting and conducting electrons, so the preparation of titanium dioxide thin films with composite morphology is an important direction of research and a prerequisite for its industrialization [Kuang, D. ; Wang, P.; Ito, S.; Zakeeruddin, S.M.; Gra¨tzel, M.J. Am. Chem. Soc. 2006, 128, 7732.]. However, the traditional sol-gel method has been used in the preparation of dense titanium dioxide films for a long time. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/48
CPCY02E10/542Y02E10/549
Inventor 刘文秀姜春华
Owner IRICO
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