Ti-doped titanium dioxide nanowire array, as well as preparing method and application of Ti-doped titanium dioxide nanowire array

A nanowire array and titanium dioxide technology, applied in the field of solar cells, can solve the problems of short photogenerated electron-hole life and low quantum efficiency, and achieve high photoelectric conversion efficiency, simple manufacturing process, and good application prospects

Inactive Publication Date: 2012-07-04
FUDAN UNIV
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Problems solved by technology

However, titanium dioxide is a wide-bandgap semiconductor (band gap of 3.2 eV), which mainly absorbs ultraviolet light. In addition, it also has the disadvantages of short lifetime of photogenerated electron-hole pairs and low quantum efficiency of photocatalytic process.

Method used

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  • Ti-doped titanium dioxide nanowire array, as well as preparing method and application of Ti-doped titanium dioxide nanowire array
  • Ti-doped titanium dioxide nanowire array, as well as preparing method and application of Ti-doped titanium dioxide nanowire array
  • Ti-doped titanium dioxide nanowire array, as well as preparing method and application of Ti-doped titanium dioxide nanowire array

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Embodiment Construction

[0020] Below, the present invention will be further described by the following examples, which will help to understand the present invention, but do not limit the content of the present invention.

[0021] First place the FTO glass in a 50 ml reaction kettle, face down, mix 15 ml of water with 13 ml of concentrated hydrochloric acid, then add 0.25 ml of tetra-n-butyl titanate and 0.2 ml of 0.1 M SnCl 4 solution. The change of the amount of acid will affect the density of the prepared nanowires (such as figure 1 ). Stir the solution for 5-10 minutes, mix well, pour it into the reaction kettle, and react at 150°C for 12 hours. After the reaction, the substrate was taken out, washed and dried. Next, the substrate was baked at 450° C. for 2 hours in a tube furnace, and further fired for 0.5 hour in a mixed atmosphere of hydrogen and argon at 150 sccm. Finally, it was cooled to room temperature under the protection of argon.

[0022] Such as image 3 As shown, the tin-doped t...

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Abstract

The invention belongs to the technical field of solar cells, in particular to a Ti-doped titanium dioxide nanowire array capable of photolyzing water efficiently, as well as a preparing method and the application of the Ti-doped titanium dioxide nanowire array. The preparing method comprises the following steps: taking tetrabutyl titanate as a Ti source, water as a solvent, and stannic chloride as an Sn source under a hydrothermal system; adding concentrated hydrochloric acid to regulate and control the hydration reaction speed; growing a Ti-doped titanium dioxide nano-wire array on an electro-conductive glass substrate made of FTO (fluorine-doped tin oxide); and carrying out heat treatment in an argon-hydrogen mixture gas or a nitrogen-hydrogen mixture gas. The technology has the advantage that the conventional water photolyzing technology and the conventional photoelectric conversion technology are coupled, so as to improve the light absorption efficiency of a solar cell, and realize the one-step process of efficient water photolyzing and photoelectric photocurrent conversion. The invention further has the advantages that the raw material sources are wide; the preparing method is simple and environment-friendly; the cost is low; and the popularization and the application are more convenient.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a tin-doped titanium dioxide nanowire array with high-efficiency photolysis of water, a preparation method thereof, and an application in solar cells. Background technique [0002] As the lifeblood of the world economy and the driving force of social development in this century, energy has been highly valued by various countries. my country's total energy demand is large and its growth rate is fast, and it has become the second largest energy producer and consumer in the world after the United States. However, the reserves of fossil fuels, which account for 90% of the world's energy supply, are increasingly depleted, and the use of fossil fuels has also led to serious environmental pollution and greenhouse effects. As a result, more and more people are turning their attention to clean and renewable new energy sources. As the source of energy on the earth, solar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B29/62C30B7/14H01L31/18
CPCY02P70/50
Inventor 郑耿锋胥明吴昊宇
Owner FUDAN UNIV
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