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Method for preparing transparent electrode based on titanium dioxide nanotubes

A titanium dioxide and transparent electrode technology is applied in the field of preparation of transparent electrodes based on titanium dioxide nanotubes, which can solve the problems of reduced quality, cumbersome steps, low film quality and the like, and achieves the effects of increasing annealing temperature, expanding absorption range and simple preparation process.

Active Publication Date: 2013-01-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method also has many problems
(1) First of all, for sputtered films, it is difficult to precisely control the anodic oxidation process so that the titanium metal film is just completely oxidized, but a layer is left unoxidized or over-oxidized
(2) The quality of the sputtered film is significantly lower than that of the titanium metal sheet, so the quality of the titanium dioxide nanotubes obtained after it is oxidized is not high
(3) For batteries, the optimal thickness of nanotubes is around tens of microns, and depositing a titanium metal layer with a thickness greater than 10 microns on a conductive substrate is still a technical problem and is very expensive, which cannot be industrialized.
However, these methods usually have cumbersome steps, take a long time, and the quality of the obtained film is low (film curl, unevenness, small cracks, etc.), and the structure and properties of the titanium dioxide nanotube film (such as thickness, crystallinity) The flexibility of adjustment is also poor, not suitable for practical applications

Method used

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  • Method for preparing transparent electrode based on titanium dioxide nanotubes
  • Method for preparing transparent electrode based on titanium dioxide nanotubes

Examples

Experimental program
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Embodiment 1

[0032] This embodiment includes the following steps:

[0033] Step 1, using an anodic oxidation method to grow a layer of titanium dioxide nanotubes on the titanium metal substrate;

[0034] Preferably, in step 1, the titanium dioxide nanotubes formed by anodic oxidation can also be annealed at a temperature greater than 0 degrees and less than or equal to 400 degrees to form an amorphous titanium dioxide nanotube structure less than 300 degrees or a crystalline titanium dioxide nanotube structure greater than 300 degrees. Thickness of 500 nanometers to 50 microns;

[0035] Specifically:

[0036] (1) A titanium dioxide nanotube layer about 15 microns thick is grown on a titanium metal sheet with a purity of 99.6% and a thickness of 1 mm by anodic oxidation. The electrolyte system is an ethylene glycol solution containing 0.5% by mass fraction of ammonium fluoride and 3% by volume of deionized water. The anodic oxidation voltage is 60 volts, provided by a constant voltage sou...

Embodiment 2

[0058] Implementation 2 is a modification of Example 1.

[0059] The difference between this example and Example 1 is that step (1) in step 2 is: peel off the sample after annealing at 350 degrees by re-anodizing, anodize again in the above electrolyte, and the anodizing voltage Still at 60 volts, the duration is 1 hour, and the temperature of the electrolyte is 30 degrees.

Embodiment 3

[0061] Embodiment 3 is a modification example of Embodiment 1.

[0062] The difference between this embodiment and Example 1 is that step 2 (3) is to anneal the peeled titanium dioxide nanotube film, and gently place the obtained crystalline titanium dioxide nanotube film on a flat surface with tweezers. On the ceramic sheet, the annealing process is carried out in air, the annealing temperature is 550 degrees, the heating and cooling rate is 3 degrees per minute, and the holding time is 2 hours.

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Abstract

The invention discloses a method for preparing a transparent electrode based on titanium dioxide nanotubes. The method comprises the following steps of: peeling titanium dioxide nanotube films in different thicknesses off a titanium metal base by using an anodic reoxidation method to improve the quality and crystallinity of the titanium dioxide nanotube films; and adhering the titanium dioxide nanotube films to different transparent conductive substrates to form a single-layer or multi-layer transparent electrode based on the titanium dioxide nanotubes. The quality and the crystallinity are high, the method for preparing the single-layer or multi-layer transparent electrode based on the titanium dioxide nanotubes has the characteristics of simplicity, reliability and high flexibility, and the titanium dioxide nanotubes are easily applied to different fields such as dye-sensitized solar cells.

Description

technical field [0001] The invention relates to a method for manufacturing a transparent electrode, in particular to a method for manufacturing a transparent electrode based on an ordered titanium dioxide nanotube array prepared by an anodic oxidation method that can be used to prepare a dye-sensitized solar cell. Background technique [0002] Titanium dioxide nanotubes combine the characteristics of titanium dioxide and adjustable nanostructures. Its application prospects have received widespread attention and have been widely used in many fields, such as photocatalysis, solar cells, electrochromic, superhydrophobic-superhydrophilic And it shows good characteristics in the application of biomedicine and so on. When applied to dye-sensitized solar cells, it is of great significance to replace traditional titanium dioxide nanoparticles with highly oriented one-dimensional titanium dioxide nanotube arrays as carriers of dyes or other photosensitizers. Vertical to the substrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/20
CPCY02E10/542
Inventor 林佳陈险峰刘晓霖陈婧非
Owner SHANGHAI JIAO TONG UNIV
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