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Porous submicron sphere, porous film electrode and preparation method and application in dye sensitized solar cells thereof

A porous film and sub-micron technology, which is applied in the interdisciplinary field of chemistry and nanomaterials, can solve the problems of large specific surface area, high light scattering electron transmission path, affecting the photoelectric conversion efficiency of the battery, limiting the performance of the device, etc., and achieving low light transmission. Overrate, improve photoelectric conversion efficiency, improve the effect of photocurrent

Inactive Publication Date: 2012-11-14
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its special photoelectric properties (better energy band, chemical stability, etc.), titanium dioxide has been widely used in photocatalysis and photoelectric fields, but it is difficult for these structures to have large specific surface area, high light scattering and fast electron transport at the same time. path, limiting device performance improvements
[0008] To sum up, the traditional nanoparticle porous film affects the photoelectric conversion efficiency of the battery due to the weak light scattering.

Method used

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  • Porous submicron sphere, porous film electrode and preparation method and application in dye sensitized solar cells thereof
  • Porous submicron sphere, porous film electrode and preparation method and application in dye sensitized solar cells thereof
  • Porous submicron sphere, porous film electrode and preparation method and application in dye sensitized solar cells thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , at room temperature and under the protection of a nitrogen atmosphere, 2ml of 0.1mol / L KCl solution and 2ml of deionized water were added to 250ml of absolute ethanol, stirred at 500rpm for 10 minutes, and then 5ml of tetraisopropyl titanate was added dropwise to the In the mixed solution, the reaction was continued for 6 hours with constant stirring, and a white precipitate was produced, which was collected by filtration. Then wash with deionized water and alcohol repeatedly 5 times each, then disperse the white solid into a mixed solution of 10ml ethanol and 30ml water containing 3ml ammonia water, and keep stirring until it becomes a sol. The sol was then transferred into an autoclave and heat-treated at 160°C for 25 hours; water and ammonia were removed by washing and vacuum rotary evaporation, and a porous submicron spherical powder with a wide diameter distribution composed of titanium d...

Embodiment 2

[0043] At room temperature and under the protection of a nitrogen atmosphere, 2ml of 0.1mol / L KCl solution and 2ml of deionized water were added to 250ml of absolute ethanol, stirred at 500rpm for 10 minutes, and then 5ml of tetraisopropyl titanate was added dropwise to the In the mixed solution, the reaction was continued for 6 hours with constant stirring. A white precipitate produced which was collected by suction filtration. Then wash with deionized water and alcohol repeatedly 5 times each, and then disperse the white solid into HNO with a pH value of 0.1 3 In the aqueous solution, keep stirring until it becomes a sol. The sol was then transferred into an autoclave and heat-treated at 180°C for 30 hours. Removal of water and HNO by washing and vacuum rotary evaporation 3 , uniformly disperse the collected titanium dioxide porous submicron spheres with wide diameter distribution in absolute alcohol, to be applied to other fields.

[0044] 5 g graded TiO 2 The porous s...

Embodiment 3

[0046] At room temperature and under the protection of a nitrogen atmosphere, 2ml of 0.1mol / L KCl solution and 2ml of deionized water were added to 250ml of absolute ethanol, stirred at 500rpm for 10 minutes, and then 5ml of tetraisopropyl titanate was added dropwise to the In the mixed solution, the reaction was continued for 6 hours with constant stirring. A white precipitate produced which was collected by suction filtration. Then wash with deionized water and alcohol repeatedly 5 times each, and then disperse the white solid into 0.1mol / L HNO 3 In the aqueous solution, keep stirring until it becomes a sol. The sol was then transferred into an autoclave and heat-treated at 200° C. for 15 hours. Removal of water and HNO by washing and vacuum rotary evaporation 3 , after drying and grinding, a porous submicron spherical powder with a wide diameter distribution composed of titanium dioxide nanoparticles was collected.

[0047] 5 g graded TiO 2 The porous submicron spheric...

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Abstract

The invention discloses a porous submicron sphere, a porous film electrode and a preparation method and the application in dye sensitized solar cells thereof. The submicron sphere is in a porous structure formed by nano TiO2 particles, the pore diameter ranges from 5nm to 50nm, the grain diameter of the TiO2 particles ranges from 10nm to 100nm, the diameter of the submicron sphere ranges from 150nm to 1000nm, and the BET specific surface area is controlled to range from 80m2 / g to 200m2 / g. The porous submicron sphere formed by titanium dioxide nano particles is in a distribution of monodisperse and wide-diameter, and the structure is large in specific surface area, higher in scattering capacity to visible lights and quicker in electronic transmission performance inside the sphere, so that the porous film electrode has larger light scattering capacity and dye adsorption capacity. When the porous submicron sphere and the porous film electrode are applied to fields of photocatalysis and photovoltaic conversion, light use ratio and electron collection rate can be increased, and the dye sensitized solar cells can obtain higher photovoltaic conversion efficiency and save TiO2 usage.

Description

technical field [0001] The invention belongs to the interdisciplinary fields of chemistry and nanomaterials, and specifically relates to a method for preparing porous submicron spheres composed of titanium dioxide nanoparticles and a porous film electrode of hierarchical porous submicron spheres for dye-sensitized solar cells. Background technique [0002] In recent years, nanomaterials have developed rapidly. Due to the characteristics of nanoparticles such as surface effects, quantum effects, small size effects, and macroscopic quantum tunneling effects, they exhibit significant differences from general macroscopic materials in terms of electricity, optics, mechanics, and magnetism. feature. [0003] The main crystal forms of titanium dioxide are anatase, rutile and brookite. The rutile type is more stable and dense than the anatase type, and has higher hardness, density, dielectric constant and refractive index, and its hiding power and tinting power are also higher. Th...

Claims

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Application Information

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IPC IPC(8): C01G23/053H01G9/20H01G9/042
CPCY02E10/542
Inventor 戴松元胡林华莫立娥盛江
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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