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One-dimensional ultra-long tio 2 Nanorod array and its preparation method and application in dye-sensitized solar cells

A technology of nanorod arrays and solar cells, which is applied in the direction of nanotechnology, nanotechnology, titanium oxide/hydroxide, etc., can solve the problems of easy crystallization of rods, short length of nanorods, small specific surface area, etc., and achieve optimal ratio The size of the surface area, the effect of solving the problem of small specific surface area and short-circuit current improvement

Active Publication Date: 2020-11-13
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] In order to overcome the shortcomings of the above-mentioned prior art, we have invented a method of programmed annealing to stably prepare ultra-long one-dimensional TiO 2 Nanorod array method, which solves the traditional hydrothermal preparation of TiO 2 Nano-rods are short in length, small in specific surface area, annealed to improve the crystallinity of the rods, easy to fall off, and difficult in mass production. In order to repeatably and stably prepare one-dimensional TiO with high specific surface area 2 Nanorod arrays offer the possibility

Method used

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  • One-dimensional ultra-long tio <sub>2</sub> Nanorod array and its preparation method and application in dye-sensitized solar cells
  • One-dimensional ultra-long tio <sub>2</sub> Nanorod array and its preparation method and application in dye-sensitized solar cells
  • One-dimensional ultra-long tio <sub>2</sub> Nanorod array and its preparation method and application in dye-sensitized solar cells

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Embodiment 1

[0070] The one-dimensional ultra-long TiO of this embodiment 2 A method for preparing a nanorod array, the method comprising the steps of:

[0071] (1) Pretreatment of fluorine-doped tin oxide transparent conductive glass (FTO) substrate

[0072] The FTO conductive glass with a thickness of 2mm and a square structure of 2cm×2cm in length and width (the thickness of the conductive layer is 380nm) is ultrasonically cleaned with decontamination powder, deionized water, acetone, and isopropanol in sequence. Each step The time is 30 minutes, and the washed FTO base is directly put into a vacuum drying oven at 70°C for drying, and it is set aside.

[0073] (2) Titanium tetrachloride aqueous solution preparation

[0074] Prepare a solution concentration of 0.3mol L in a fume hood -1 Measure the titanium tetrachloride aqueous solution with a plastic dropper, slowly drop it into 500mL ice-water mixed deionized water at a height of 1 to 2 cm from the liquid surface, and keep stirring...

Embodiment 2

[0082] The one-dimensional ultra-long TiO of this embodiment 2 A method for preparing a nanorod array, the method comprising the steps of:

[0083] (1) Pretreatment of fluorine-doped tin oxide transparent conductive glass (FTO) substrate

[0084] The FTO conductive glass with a thickness of 2mm and a square structure of 2cm×2cm in length and width (the thickness of the conductive layer is 380nm) is ultrasonically cleaned with decontamination powder, deionized water, acetone, and isopropanol in sequence. Each step The time is 30 minutes, and the washed FTO base is directly put into a vacuum drying oven at 70°C for drying, and it is set aside.

[0085] (2) Titanium tetrachloride aqueous solution preparation

[0086] Prepare a solution concentration of 0.3mol L in a fume hood -1 Measure the titanium tetrachloride aqueous solution with a plastic dropper, slowly drop it into 250mL ice-water mixed deionized water at a height of 1 to 2 cm from the liquid surface, and keep stirring...

Embodiment 3

[0094] The one-dimensional ultra-long TiO of this embodiment 2 A method for preparing a nanorod array, the method comprising the steps of:

[0095] (1) Pretreatment of fluorine-doped tin oxide transparent conductive glass (FTO) substrate

[0096] The FTO conductive glass with a thickness of 2mm and a square structure of 2cm×2cm in length and width (the thickness of the conductive layer is 380nm) is ultrasonically cleaned with decontamination powder, deionized water, acetone, and isopropanol in sequence. Each step The time is 30 minutes, and the washed FTO base is directly put into a vacuum drying oven at 70°C for drying, and it is set aside.

[0097] (2) Titanium tetrachloride aqueous solution preparation

[0098] Prepare a solution concentration of 0.3mol L in a fume hood -1 Measure the titanium tetrachloride aqueous solution with a plastic dropper, slowly drop it into 100mL of ice-water mixed deionized water at a height of 1 to 2 cm from the liquid surface, and keep stirr...

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Abstract

The invention discloses one-dimensional ultralong TiO 2 Nanorod array and its preparation method and application in dye-sensitized solar cells. The present invention adopts the bracket method to fix multiple pieces of conductive substrates and mass-produce multiple pieces of TiO with uniform height in one reactor 2 Nanorod arrays, combined with muffle furnace-programmed recrystallization annealing effectively solve one-dimensional TiO 2 Nanorod arrays are easy to fall off from the conductive substrate and difficult to generate heat and water. At the same time, combined with the scaffold method, the obtained TiO 2 Hydrothermal etching of nanorod arrays effectively solves the problem of one-dimensional TiO 2 The problems of small specific surface area of ​​nanorod arrays and insufficient dye adsorption amount. TiO obtained by the present invention 2 The nanorod array exhibits excellent electron transport ability and dye adsorption ability, and its application in dye-sensitized solar cells has obtained a photoelectric conversion efficiency of 11.14%, which is based on one-dimensional TiO for stable mass production. 2 High-efficiency dye-sensitized solar cells with nanorod array photoanodes offer the possibility.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, in particular to one-dimensional ultra-long TiO 2 Nanorod array and its preparation method and application in dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cells have attracted extensive research since they were first reported by Grazel et al. [1-3] , usually DSSC consists of a mesoporous film (photoanode), a single layer of dye molecules, electrolyte and counter electrode, mesoporous TiO 2 After the particle membrane adsorbs dye molecules, under the irradiation of sunlight, the dye molecules absorb sunlight to generate excited charges and inject electrons into TiO2. 2 The electrons are then transported to the electrode, while the redox couple of the electrolyte enables rapid regeneration of the excited state dye [4-6] . Mesoporous TiO 2 Due to the large number of grain boundaries between particles and the large number of defects on the surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042C01G23/053B82Y40/00B82Y30/00
CPCY02E10/542Y02P70/50
Inventor 王浩万经树张军桃李
Owner HUBEI UNIV
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