A kind of tio2 nanotube array photoanode and preparation method thereof

A nanotube array and photoanode technology, applied in the field of solar cells, can solve the problems of low light collection efficiency, long time consumption, and high cost

Inactive Publication Date: 2011-12-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the deficiencies in the prior art, such as high cost, long time consumption, low light ...

Method used

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  • A kind of tio2 nanotube array photoanode and preparation method thereof
  • A kind of tio2 nanotube array photoanode and preparation method thereof
  • A kind of tio2 nanotube array photoanode and preparation method thereof

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Embodiment 1

[0035] This embodiment is a TiO 2 Nanotube array photoanode, characterized in that TiO 2 The inner diameter of the nanotube is 70±4nm, the tube wall is 20±2nm, and the tube length is 1.946um. In the TiO 2 There is a silver film on the surface of the nanotube array; the microscopic surface morphology of the silver film is randomly distributed dendrites. 100-300nm.

[0036] The preparation process of this embodiment is as follows:

[0037] Step 1, processing the titanium foil substrate: cutting the titanium foil into strips of 1 cm×5 cm, polishing, and ultrasonic cleaning with acetone, absolute ethanol and deionized water for 5 minutes each; the ultrasonic power is 200 watts.

[0038] Step 2, preparing electrolyte: the electrolyte is ammonium fluoride electrolyte, silver nitrate electrolyte, saturated potassium chloride electrolyte and sodium sulfate electrolyte. in:

[0039] The ammonium fluoride electrolyte is made up of 0.25wt% ammonium fluoride, 2.5vol% deionized water...

Embodiment 2

[0046] This embodiment is a TiO 2 Nanotube array photoanode, characterized in that TiO 2 The inner diameter of the nanotube is 100±10nm, the tube wall is 20±4nm, and the tube length is 450±30nm. In the TiO 2 There is a silver film on the surface of the nanotube array; the microscopic surface morphology of the silver film is randomly distributed dendrites. 100-300nm.

[0047] The preparation process of this embodiment is as follows:

[0048] Step 1, processing the titanium foil substrate: cutting the titanium foil into strips of 1 cm×5 cm, polishing, and ultrasonic cleaning with acetone, absolute ethanol and deionized water for 5 minutes each; the ultrasonic power is 200 watts.

[0049] Step 2, prepare electrolyte: electrolyte is hydrogen fluoride electrolyte, silver nitrate electrolyte, saturated potassium chloride electrolyte and sodium sulfate electrolyte. in:

[0050] Hydrogen fluoride electrolyte is made of 0.1mol L -1 Hydrogen fluoride and 2.0mol·L -1mixed solutio...

Embodiment 3

[0057] This embodiment is a TiO 2 Nanotube array photoanode, characterized in that TiO 2 The inner diameter of the nanotube is 70±4nm, the tube wall is 20±2nm, and the tube length is 1.946um. In the TiO 2 There is a silver film on the surface of the nanotube array; the microscopic surface morphology of the silver film is randomly distributed dendrites. 100-300nm.

[0058] The preparation process of this embodiment is as follows:

[0059] Step 1, processing the titanium foil substrate: cutting the titanium foil into strips of 1 cm×5 cm, polishing, and ultrasonic cleaning with acetone, absolute ethanol and deionized water for 5 minutes each; the ultrasonic power is 200 watts.

[0060] Step 2, preparing electrolyte: the electrolyte is ammonium fluoride electrolyte, silver nitrate electrolyte, saturated potassium chloride electrolyte and sodium sulfate electrolyte. in:

[0061] The ammonium fluoride electrolyte is made up of 0.25wt% ammonium fluoride, 2.5vol% deionized water...

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Abstract

The invention provides a TiO2 nanotube array photoanode and a preparation method thereof. The photoanode is characterized by electrodepositing a silver film on the surface of the TiO2 nanotube array of the photoanode, wherein the microscopic surface topography of the silver film is randomly distributed dendrites; the primary dendrites are 6-15mu m long; the secondary dendrites are 600nm-3mu m long; and the space between the secondary dendrites is 100-300nm. The silver modified TiO2 nanotube array photoanode is obtained by reasonably controlling the concentration, electrodeposition temperature, deposition potential and deposition time of the silver nitrate electrolyte. The silver is used as the noble metal instead of gold and electrodeposition is used instead of the electron beam lithography technology to prepare the silver nanoparticle-TiO2 nanotube array structure as the solar cell photoanode, thus lowering the cost and shortening the preparation period. The short-circuit current density and open-circuit voltage of the silver nanoparticle-TiO2 nanotube array photoanode after being modified by the metal are greatly improved compared with the short-circuit current density and open-circuit voltage of the silver nanoparticle-TiO2 nanotube array photoanode before being modified by the metal.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a solar cell photoanode and a preparation method thereof. Background technique [0002] In recent years, since the invention of dye-sensitized nanocrystalline solar cells (DSSC), it has become a research hotspot at home and abroad due to the advantages of low cost, simple process and stable performance. In order to improve the photoelectric conversion efficiency of the battery, researchers continue to improve the sensitizer, electrolyte and semiconductor photoanode materials of the battery. Among them, selecting a suitable semiconductor photoanode material is an important way to improve the photoelectric conversion efficiency of the battery. Since the 1980s, Gratzel's research group at the Swiss Industrial School of Lausanne has been working on dye-sensitized TiO 2 Research on thin-film solar cells, "A Low-cost, High-efficiency Solar-cell Based on Dye-sensitized Colloidal TiO2" publi...

Claims

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Application Information

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IPC IPC(8): H01G9/048H01G9/20H01M14/00H01L51/44H01L51/48
CPCY02E10/549Y02E10/50Y02P70/50
Inventor 陈福义樊莉红
Owner NORTHWESTERN POLYTECHNICAL UNIV
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