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Dye-sensitized solar cell based on B4Ti3O12/TiO2 heterojunction and preparation method thereof

A technology of solar cells and dye sensitization, applied in the field of solar cells, can solve the problems of difficult to further improve the photovoltaic performance of solar thin film cells, poor light absorption efficiency, difficult to absorb visible light, etc.

Inactive Publication Date: 2017-05-31
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, TiO 2 The nanotube array has a wide band gap (3.2eV), it is difficult to absorb visible light containing high energy, the light absorption efficiency is poor, and due to factors such as defects and grain boundaries, TiO 2 The generated photogenerated carriers are easy to recombine, which also inhibits its photoelectric performance, resulting in the presence of TiO 2 The optoelectronic performance of nanotube array solar thin film cells is difficult to further improve

Method used

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  • Dye-sensitized solar cell based on B4Ti3O12/TiO2 heterojunction and preparation method thereof
  • Dye-sensitized solar cell based on B4Ti3O12/TiO2 heterojunction and preparation method thereof
  • Dye-sensitized solar cell based on B4Ti3O12/TiO2 heterojunction and preparation method thereof

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preparation example Construction

[0036] The present invention provides a kind of above-mentioned scheme based on B 4 Ti 3 o 12 / TiO 2 A method for preparing a heterojunction dye-sensitized solar cell, comprising the following steps:

[0037] The titanium sheet is subjected to secondary electrolytic oxidation treatment and annealing to obtain TiO on the surface of the titanium sheet 2 nanotube arrays;

[0038] will grow with TiO 2 Titanium sheets of nanotube arrays were hydrothermally reacted in a mixed solution of bismuth nitrate, water and KOH to obtain B 4 Ti 3 o 12 / TiO 2 Heterojunction;

[0039] Will B 4 Ti 3 o 12 / TiO 2 The heterojunction was soaked in the photosensitizing dye solution in the dark to obtain the sensitized B 4 Ti 3 o 12 / TiO 2 Heterojunction;

[0040] Sensitized B 4 Ti 3 o 12 / TiO 2 The 3~6mm around the heterojunction is sealed and fixed on the upper surface of the conductive glass containing the transparent electrode, and then to the B 4 Ti 3 o 12 / TiO 2 Electro...

Embodiment 1

[0070] Cut a 2mm thick titanium sheet with a purity greater than 99.99% into a square piece of 4cm in length and 4cm in width, and polish the surface with sandpaper of 3000 mesh, 5000 mesh, and 7000 mesh in turn, and put the polished titanium sheet into acetone, Ultrasound in ethanol and deionized water for 30 minutes, control the ultrasonic power to 100W, and then dry in an oven at 80°C;

[0071] The pretreated titanium sheet is connected to the positive pole of the DC stabilized voltage power supply, and a piece of graphite sheet of the same size as the titanium sheet is connected on the negative pole, and electrolyte (ammonium fluoride powder (0.3wt%) and ethylene glycol (245ml) is added in the oxidation device ) solutions were mixed and stirred for 3 hours to obtain the electrolyte used for anodic oxidation), 80% of the area of ​​the titanium sheet was controlled to be immersed in the electrolyte, the oxidation voltage was adjusted to 50V, magnetic stirring was maintained, ...

Embodiment 2

[0088] Cut a 2mm thick titanium sheet with a purity greater than 99.99% into a square piece of 4cm in length and 4cm in width, and polish the surface with sandpaper of 3000 mesh, 5000 mesh, and 7000 mesh in turn, and put the polished titanium sheet into acetone, Ultrasound in ethanol and deionized water for 40 minutes, control the ultrasonic power to 90W, and then dry in an oven at 70°C;

[0089] The pretreated titanium sheet is connected to the positive pole of the DC stabilized voltage power supply, and a piece of platinum sheet of the same size as the titanium sheet is connected on the negative pole, and electrolyte (ammonium fluoride powder (0.3wt%) and ethylene glycol (245ml) is added in the oxidation device ) solutions were mixed, stirred for 3 hours to obtain the electrolyte used for anodic oxidation), 80% of the area of ​​the titanium sheet was controlled to be immersed in the electrolyte, the oxidation voltage was adjusted to 55V, magnetic stirring was maintained, and ...

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Abstract

The invention discloses a dye-sensitized solar cell based on a B4Ti3O12 / TiO2 heterojunction. The dye-sensitized solar cell based on the B4Ti3O12 / TiO2 heterojunction comprises a titanium metal layer, the B4Ti3O12 / TiO2 heterojunction, a photosensitive dye and an electrolyte, a transparent electrode and a conductive glass layer in sequence from bottom to top; the B4Ti3O12 / TiO2 heterojunction comprises a TiO2 nanotube array and B4Ti3O12 which is positioned on the surface of the TiO2 nanotube array; and the TiO2 nanotube array is positioned on the surface of the titanium metal layer. According to the dye-sensitized solar cell based on the B4Ti3O12 / TiO2 heterojunction, as B4Ti3O12 with narrow-band-gap width and the TiO2 nanotube array with wide-band-gap width are compounded to form a good gradient energy band, a carrier is promoted to move to the electrode, electron transport is oriented, a problem that a photon-generated carrier of the TiO2 nanotube array is easy to compound is avoided, the photoelectric property of the obtained solar cell is excellent and the short-circuit current density of the solar cell is about 3.5 mA / cm<2>.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a B-based 4 Ti 3 o 12 / TiO 2 Heterojunction dye-sensitized solar cell and its preparation method. Background technique [0002] Silicon-based solar cells occupy a dominant position in the solar cell market due to their good electron transport capability and strong stability. However, the high production cost of silicon-based solar cells and the large environmental pollution in the production process have affected their further development. Thin-film solar cells are made of silicon, cadmium sulfide, gallium arsenide, etc., with thin films on the order of microns as the base material, which directly convert light energy into electrical energy through the photoelectric effect or photochemical effect, and have low production costs and environmental protection. The characteristics of less pollution, is seen as a substitute for silicon solar cells. However, the low photoelectr...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2036Y02E10/542Y02P70/50
Inventor 陈侃松田寒叶小雨顾豪爽王钊
Owner HUBEI UNIV