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Preparation method for ultra-long TiO2 nanowire array thin-film photo-anode

A nanowire array and photoanode technology, applied in the field of dye-sensitized solar cells, can solve the problem of high recombination loss of photogenerated carriers, achieve fast electron transfer rate, small recombination loss, and improved performance

Inactive Publication Date: 2015-04-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to solve the existing dye-sensitized solar cell TiO 2 The problem of high recombination loss of photogenerated carriers in nanocrystalline photoanodes, and providing an ultra-long TiO 2 Preparation method of nanowire array thin film photoanode

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  • Preparation method for ultra-long TiO2 nanowire array thin-film photo-anode
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  • Preparation method for ultra-long TiO2 nanowire array thin-film photo-anode

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specific Embodiment approach 1

[0036] Specific implementation mode 1: In this implementation mode, one-dimensional rutile TiO is directly synthesized on FTO conductive glass by a solvothermal method. 2 A nanowire array, comprising the steps of:

[0037] Step 1. Treat the FTO glass substrate: Cut the FTO glass according to the size of 2.0×1.5 cm in length and width, put it in aqueous detergent solution, acetone and absolute ethanol for 10 minutes, and then use deionized Rinse with water and ethanol and dry.

[0038] Step 2. TiCl 4 Solution pre-treatment: Put the FTO glass with the conductive side facing up into the solution filled with 0.2 M TiCl 4 The solution was treated in a beaker at 70°C for 30 min, and after taking it out, it was rinsed with deionized water and ethanol in turn and dried. in:

[0039] TiCl used 4 The solution was prepared as follows: 250 mL of deionized water and 41.7 mL of concentrated hydrochloric acid were added to a 500 mL beaker. Slowly add 55 mL TiCl dropwise to the beaker w...

specific Embodiment approach 2

[0046] Specific implementation mode two: TiO 2 Controlled Growth of Nanowire Arrays:

[0047] First, the length, density and regularity of nanowires can be controlled by changing the ratio of ethanol to hydrochloric acid by fixing the reaction time and the volume of titanium tetrachloride. In this embodiment, 3 mL of titanium tetrachloride solution is used, the reaction time is fixed at 12 h, and the reaction temperature is 150°C. and 40:20 ratio change process, TiO 2 The lengths of the nanowires were 23.3 μm, 39.5 μm, 51.4 μm, 30.3 μm, 17.4 μm, and 17.3 μm, showing a trend of first increasing and then decreasing; and with the increase of the proportion of ethanol, the nanowires gradually evolved from aggregation to cluster growth grow independently. When the volume ratio of ethanol: hydrochloric acid is 25:35, the diameter of the nanowires is uniform, the regularity of the shape is high, and the length is the longest. TiO synthesized under different volume ratios of ethan...

specific Embodiment approach 3

[0049] Specific implementation mode three: with TiO 2 Assembly of Dye-Sensitized Solar Cells with Nanowire Array Thin Film as Photoanode ( Figure 14 ):

[0050] Treat the synthesized nanowire film to obtain TiO with a diameter of 6 mm 2 Nanowire circular film.

[0051] TiCl 4 Solution post-treatment: the configured 1 M TiCl 4 Dilute the hydrochloric acid solution to 40 mM, and glue the edge of the FTO glass conductive surface with a waterproof tape of a certain size to avoid the deposition of nanocrystalline TiO 2 , affecting its conductivity. Then, put the FTO glass into 40 mM TiCl 4 In the aqueous solution, treat at 70 °C for 30 min, tear off the tape on the FTO glass, rinse with deionized water and ethanol in turn, and dry it, and set it aside.

[0052] TiO 2 Sensitization of nanowire thin film electrodes: Before sensitization, under the condition of air flow, TiO 2 The nanowire thin film electrode was heated to 500 °C for 30 min and cooled to 90 °C naturally, and...

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Abstract

The invention relates to a preparation method for an ultra-long TiO2 nanowire array thin-film photo-anode, and belongs to the field of dye-sensitized solar cells. The problem that photon-generated carrier composite losses of an existing dye-sensitized solar cell TiO2 nanocrystalline photo-anode are large is solved. The preparation method comprises the steps that a solvothermal synthesis reaction is carried out at a time, an ethyl alcohol, hydrochloric acid and TiCl4 mixed solution is used as a precursor, and an ultra-long one-dimensional TiO2 nanowire array thin film is made to grow on a piece of FTO conductive glass. The TiO2 nanowire array thin film photo-anode is directly applied on the dye-sensitized solar cell; according to the one-dimensional structure, the electron transport speed is high, the photon-generated carrier composite losses are small, and the performance of the dye-sensitized solar cell is improved.

Description

Technical field [0001] The present invention belongs to the field of dye -sensitized solar cells, involving an ultra -long TIO through a solvent thermal reaction 2 The preparation method of nano -wire array thin anode. Background technique [0002] Energy is an important material basis for the development of national economic development and the improvement of people's living standards.With the continuous improvement of human social productivity, energy consumption is also increasing.At the same time, the energy crisis and environmental deterioration caused by large -scale use of fossil energy have become the primary problems that humans need to solve.In particular, the outbreak of the energy crisis in 1973 prompted countries around the world to accelerate the research and development of renewable energy such as solar, wind energy, water energy, and nuclear energy.As the most renewable energy source for solar energy, it has the unparalleled advantages of other energy sources: ren...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042B82Y30/00B82Y40/00
CPCY02E10/542
Inventor 于清江李海亮于翠玲黄跃武王金忠国凤云高世勇
Owner HARBIN INST OF TECH
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