TiO2 microspheres and preparation method of TiO2-based photoanode dye-sensitized solar cell

A technology of solar cells and dye sensitization, which is applied in the preparation of solar cells, the preparation of TiO2 microspheres and their TiO2-based photoanode dye-sensitized solar cells, and can solve the problems of difficulty in improving battery performance and low dye loading. Achieve the effects of improving battery performance, enhancing suppression of electron recombination, and good photoelectric conversion performance

Active Publication Date: 2017-02-22
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, the one-dimensional nanorod structure can improve the electron transport performance. Researchers often directly grow nanorods on the FTO glass substrate to form a nano-array structure, thereby improving the electron transport performance. However, there is also a defect, the dye loading Therefore, the synthesis of nanorod self-assembled structures with high specific surface area is very meaningful for the field of battery photoanodes.

Method used

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  • TiO2 microspheres and preparation method of TiO2-based photoanode dye-sensitized solar cell
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  • TiO2 microspheres and preparation method of TiO2-based photoanode dye-sensitized solar cell

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Experimental program
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Effect test

Embodiment 1

[0033] Nanorod self-assembled rutile phase TiO 2 Preparation of microspheres:

[0034] Take 5mL tetrabutyl titanate and 1.5mL concentrated hydrochloric acid in a 100mL beaker, stir at a stirring speed of 320r / min for 15min, take 1.00mL titanium tetrachloride solution with a concentration of 2mol / L with a pipette gun, and add it dropwise to the solution , to ensure no precipitation during the process, after stirring for 10 minutes, add 25mL of toluene and stir rapidly for 2h, move the mixture to a 50mL reactor and react at 150°C for 4h, wash with distilled water and ethanol for 2-3 times, centrifuge and dry for 24h , to obtain nanorod self-assembled rutile phase TiO 2 Microspheres.

Embodiment 2

[0036] Efficient TiO 2 Fabrication of photoanode dye-sensitized solar cells:

[0037] (1) Cleaning of photoanode FTO glass substrate and TiCl 4 Pre-processing:

[0038] The photoanodic FTO glass substrate was treated with detergent, deionized water, isopropanol, acetone and ultraviolet ozone for 15-120 minutes to obtain a clean surface. The cleaned FTO glass substrate was immersed in 0.04mol / L TiCl 4In the aqueous solution, stand at 70°C for 30 minutes, and wash with distilled water and ethanol for 1 or 2 times. For the FTO glass substrate of the counter electrode, a small hole with a diameter of 1 mm is first drilled through a glass puncher to facilitate the injection of the electrolyte. The subsequent cleaning process is like the cleaning process of the photoanode FTO glass substrate. After the ozone treatment, the FTO glass substrate of the counter electrode is calcined. The calcining process is to raise the temperature to 450° C. by program control, keep it for 15 minu...

Embodiment 3

[0048] Efficient TiO 2 Fabrication of photoanode dye-sensitized solar cells:

[0049] (1) Cleaning of photoanode FTO glass substrate and TiCl 4 Pre-processing:

[0050] The photoanodic FTO glass substrate was treated with detergent, deionized water, isopropanol, acetone and ultraviolet ozone for 15-120 minutes to obtain a clean surface. The cleaned FTO glass substrate was immersed in 0.04mol / L TiCl 4 In the aqueous solution, stand at 70°C for 30 minutes, and wash with distilled water and ethanol for 1 or 2 times. For the FTO glass substrate of the counter electrode, a small hole with a diameter of 1 mm is first drilled through a glass puncher to facilitate the injection of the electrolyte. The subsequent cleaning process is like the cleaning process of the photoanode FTO glass substrate. After the ozone treatment, the FTO glass substrate of the counter electrode is calcined. The calcining process is to raise the temperature to 450° C. by program control, keep it for 15 min...

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Abstract

The invention discloses TiO2 microspheres and a preparation method of a TiO2-based photoanode dye-sensitized solar cell, and particularly relates to a TiO2 seed crystal growth and two-phase synthesis method. A three-dimensional microsphere structure is formed by self-assembling one-dimensional nanorods, and the nanorod-self-assembled microsphere structure with the high specific surface area is obtained by controlling the reaction time, the reaction time, the quantity of reaction raw materials, the microsphere size and the specific surface area size. The prepared TiO2 with the high specific surface area is applied in the field of dye-sensitized solar cell photoanodes, the microsphere structure has the high scattering property at the wavelength ranging from 420 nm to 800 nm, and capture of the photoanodes on photons can be promoted; the commercially available 20-30-nm photoanodes prepared from anatase type TiO2 nanoparticles (P25) are optimized and improved by means of the scattering property of the particles and quick electron transportation channels supplied by the nanorod structure, therefore, the light scattering property is enhanced, electron transportation and electron recombination inhibition are promoted, and then the photoelectric conversion efficiency reaching up to 8.62% is achieved.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Microspheres and their TiO 2 The invention discloses a preparation method of a dye-sensitized solar cell based on photoanode, and belongs to the technical field of preparation methods of solar cells. Background technique [0002] In recent years, in order to solve the increasingly severe energy and environmental problems, people have turned their attention to the development and utilization of new energy. Among various new energy technologies, photovoltaic power generation is undoubtedly one of the most promising directions. Since 1991, Swiss scientist Gratzel prepared TiO 2 Based on dye-sensitized solar cells, the photoelectric conversion efficiency as high as 10% and the low production cost have attracted the attention of many scientific researchers. As a key component of dye-sensitized solar cells, the photoanode plays a decisive role in the performance of the cell. At present, many workers have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20
CPCY02E10/542H01G9/20H01G9/2031
Inventor 李欣何雄
Owner HARBIN INST OF TECH
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