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TiO2 nano-tube array for dye-sensitized solar cell and preparation method thereof

A nanotube array, solar cell technology, applied in photosensitive devices, circuits, capacitors, etc., can solve the problems of unfavorable adsorption amount of sunlight utilization efficiency, difficult to guarantee film quality, small specific surface area, etc. The effect of good recyclability and high specific surface area

Inactive Publication Date: 2013-03-20
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has expensive equipment and complicated process, and it is difficult to guarantee the film quality.
There are also researchers who have prepared one-dimensional nanostructured TiO on TiTa, TiMn, TiZrNb and other alloy flake substrates. 2 nanotube array films, however, the one-dimensional nanostructures prepared by the above method with doped modified TiO 2 Nanotube arrays, the specific surface area is relatively small, therefore, still not conducive to nanocrystalline TiO 2 Increased Adsorption Amount of Dye Sensitizer on Semiconductor and Improvement of Sunlight Utilization Efficiency

Method used

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  • TiO2 nano-tube array for dye-sensitized solar cell and preparation method thereof
  • TiO2 nano-tube array for dye-sensitized solar cell and preparation method thereof
  • TiO2 nano-tube array for dye-sensitized solar cell and preparation method thereof

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[0034] The invention provides a TiO2 nanotube array with a three-dimensional structure and Cu-doped modification and a preparation method thereof, which utilizes an electrochemical anodic oxidation method to directly build a DNA helical structure or a mesh structure substrate on a CuTi alloy wire substrate. Cu-doped modified TiO2 nanotube arrays with three-dimensional structure, highly ordered arrangement and strong visible light response performance were prepared. Using Cu-doped modified TiO2 nanotube arrays with this structure as the photoanode of dye-sensitized solar cells can effectively increase the specific surface area of ​​nanocrystalline TiO2 semiconductors, increase the adsorption capacity of dye sensitizers, and enhance the performance of nanocrystalline TiO2. 2 Semiconductor utilization efficiency of sunlight, promoting nanocrystalline TiO 2 The range of applications in the field of dye-sensitized solar currents.

[0035] In this application, the term "crystalliza...

Embodiment 1

[0037] In this example 1, a Cu-doped modified TiO with a three-dimensional structure for dye-sensitized solar cells 2 A method for preparing a nanotube array, comprising the following steps:

[0038] (1) See figure 1 , prepared binary copper-titanium alloy wires by arc melting method. Grinding and polishing the Cu5-Ti95 alloy wire substrate 1 with a diameter of 3-5mm, a length of 100-150mm, a mass percentage of Cu of 5%, and a mass percentage of Ti of 95% with metallographic sandpaper;

[0039] (2) See figure 2 , the Cu5-Ti95 alloy wire matrix pretreated in step (1) is constructed as figure 2 Substrate 2 with DNA helical structure shown;

[0040] (3) Ultrasonic clean the matrix of the DNA helical structure obtained in step (2) in acetone for 5-15 minutes, then ultrasonically clean it in absolute ethanol for 5-15 minutes, and finally rinse it with distilled water for 3-5 times. The Cu5-Ti95 alloy matrix is ​​purged and dried with inert gas such as argon for later use;

...

Embodiment 2

[0047] In this example, a Cu-doped modified TiO with a three-dimensional structure for dye-sensitized solar cells 2 A method for preparing a nanotube array, comprising the following steps:

[0048] Except for step (2), other implementation steps are the same as in Example 1.

[0049] Step (2) is: constructing the Cu5-Ti95 alloy wire matrix pretreated in step (1) as image 3 Shown is a base body 3 with a mesh structure.

[0050] Cu-doped modified TiO with three-dimensional structure prepared by Examples 1 and 2 2 Nanotube arrays whose structural units are Cu-doped TiO 2 nanotubes, and there is a layered structure, and its surface morphology is as follows Figure 5 shown. In the large black area, the Cu-doped TiO 2 The length, diameter and wall thickness of nanotubes are about 200~300nm, 40~50nm, 5~10nm, respectively. While in the petal-shaped region, Cu-doped TiO 2 The length, diameter and wall thickness of nanotubes are about 500-800nm, 40-50nm and 5-10nm, respectively...

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Abstract

The invention discloses a TiO2 nano-tube array for a dye-sensitized solar cell. The TiO2 nano-tube array is a metal Cu-doped modified TiO2 nano-tube array with a deoxyribonucleicacid (DNA) helix-shaped or screen-shaped three-dimensional nano structure. The invention further discloses a preparation method of the Cu-doped TiO2 nano-tube array. Through adopting an electrochemical anodic oxidation method, the TiO2 nano-tube array with a three-dimensional structure and relatively high visible light response performance is directly grown on a matrix with a DNA helix structure or a screen structure, which is constructed by a copper-titanium alloy matrix. The Cu-doped modified TiO2 nano-tube array and the three-dimensional structure which are prepared by adopting the preparation method have the advantages that forbidden band width of TiO2 is effectively widened, and the specific surface area of the TiO2 nano-tube array is increased, so that the adsorbability of a TiO2 semiconductor over dye is remarkably improved, sunlight can be highly effectively absorbed, and the improvement of the photoelectric conversion performance of the dye-sensitized nano-crystalline TiO2 solar cell is facilitated. The method has the advantages of simple process, low cost and high controllable degree.

Description

technical field [0001] The present invention relates to a kind of titanium dioxide (TiO 2 ) nanotube arrays, especially a Cu-doped modified TiO with a three-dimensional (3D) structure 2 Nanotube arrays and methods of making them. Background technique [0002] Dye-sensitized solar cells, as the third generation of solar cells, have the advantages of low cost, simple manufacturing process, environmental friendliness, high potential photoelectric conversion efficiency, etc., and have very broad application prospects. In dye-sensitized solar cells, the photoanode material is the core component, and TiO 2 As a resource-rich, safe, non-toxic, and chemically stable semiconductor material, its excellent surface properties, dye adsorption capacity, and advantages in charge separation and electron transport make it the most successful dye-sensitized material currently studied. semiconductors. Dye-sensitized solar cells usually use TiO 2 Nanocrystalline porous films serve as dye a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542
Inventor 马清陈建军刘绍军檀满林李冬霜符冬菊
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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