Titanium dioxide crystallized light absorption enhancement thin film electrode and its preparation method

A titanium dioxide and thin-film electrode technology, which is applied in the field of TiO2 nanocrystalline thin-film electrodes, can solve the problems of complicated preparation methods, unfavorable industrialization of dye-sensitized solar cells, etc., and achieves simple preparation methods, good overall light transmittance and flatness, and good transparency. Overrate effect

Active Publication Date: 2007-02-07
TSINGHUA UNIV
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  • Description
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Problems solved by technology

[0013] About Dense TiO 2 The preparation methods of thin films mainly include: Appl.Phys.Lett.2005, 87:263504-1--263504-3, Chem.Comm.2005, 4351-4353, Electrochim.Acta 1995, 40:643-652, Nature 1998, Spray pyrolysis method reported in 395:583-585 and Sol.Energy Mater.Sol.Cells 20

Method used

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  • Titanium dioxide crystallized light absorption enhancement thin film electrode and its preparation method
  • Titanium dioxide crystallized light absorption enhancement thin film electrode and its preparation method
  • Titanium dioxide crystallized light absorption enhancement thin film electrode and its preparation method

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preparation example Construction

[0062] The preparation method of titanium dioxide nanocrystal light absorption enhanced thin film electrode of the present invention comprises the following steps:

[0063] (1) Clean the surface of the conductive substrate. Use ethanol / acetone mixed solvent to ultrasonically clean the surface of the ITO conductive substrate for 15 minutes, then put it into deionized water with detergent and ultrasonically clean it for 15 minutes, then put it into deionized water and ultrasonically rinse it for 15 minutes three times, then place the conductive substrate in In a clean bench, dry with an infrared lamp.

[0064] (2) Preparation of titanium precursor solution: 3 mL of titanium precursor was dissolved in 100 mL of petroleum ether, and a titanium precursor solution with a concentration of 3% by volume was prepared.

[0065] (3) Preparation of primary semi-finished products of titanium dioxide dense thin film electrodes. The titanium precursor solution in step (2) is evenly coated (...

Embodiment 1

[0087] According to Chinese Science Bulletin, 2005, 50 (18): 1985-1990 and J.Phys.Chem.B, 1997, the method that reports in V.101.55~57 prepares titanium dioxide small particle colloid: prepare the acetic acid (analysis of pH=2) The pure) aqueous solution was kept in an ice bath at a temperature around 0°C. Under vigorous stirring conditions, a mixed solution of 72 mL of titanium isopropoxide (analytical grade) and 72 mL of isopropanol (analytical grade) was added dropwise to 600 mL of acetic acid aqueous solution, and stirred overnight at room temperature to obtain a clear and transparent solution. The solution was vigorously stirred at a constant temperature of 80° C. to evaporate the isopropanol in the solution to obtain a light blue transparent solution. The above light blue transparent solution was placed in a titanium autoclave with a built-in Teflon cup, and heated at 230°C for 12 hours to obtain white TiO 2 precipitation. After the solution is cooled, ultrasonically d...

Embodiment 2

[0092] According to the method in Example 1, except that the polymethyl methacrylate spherical particle size is changed to 300nm, other steps are identical. The first layer of dense TiO 2 The thickness of the film layer is 5 nanometers, which is composed of titanium dioxide particles with a particle size of 2 nanometers; the second layer of macroporous TiO 2 The thickness of the film layer is 4 microns, and it is composed of titanium dioxide particles with a diameter of 25 nanometers and spherical air macropores with a diameter of 300 nanometers.

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Abstract

The invention relates to a Titania crystal adsorption enhancement film electrode and relative production, wherein said film electrode is formed by the conductive substrate and the composite layer formed by the first layer of dense TiO2 film and the second layer of large-hole film layer; the first dense TiO2 film is formed by the titania particles whose diameter is 2-5nm; the second layer is formed by the titania particle whose diameter is 5-60nm and the ball air hole whose diameter is 80-1500nm. Said Titania dense film can effectively baffle the electron combination between the electrolyte and the conductive substrate; the large-hole emission film has hundreds of nanometer air large holes on the film material, with high light diffuse property.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Nanocrystalline thin-film electrodes, especially TiO with light-scattering centers to improve light absorption efficiency 2 A nanocrystalline film electrode belongs to the field of photoelectric technology. Background technique [0002] Titanium dioxide has the advantages of non-toxicity to organisms, no photocorrosion under light, good acid and alkali resistance, very stable chemical and physical properties, abundant sources, and low price. Clean ceramics, gas sensitive ceramics, thermistor ceramics, varistor ceramics, sensors, air purification, sewage treatment, sunscreen cosmetics, anti-ultraviolet fibers, exterior wall coatings and anti-fog glass preparation and other fields have extremely broad application prospects of semiconductor materials. [0003] Titanium dioxide is divided into three crystal forms: Anatase, Rutile and Brookite. Anatase or rutile titanium dioxide is generally used in solar ...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/48H01L31/0224H01L31/18H01G9/20H01M14/00
CPCY02E10/549Y02P70/50
Inventor 邱勇马玉涛王立铎
Owner TSINGHUA UNIV
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