Preparation process of TiO2 nanotube/PbS/CuS nanocomposite

Abstract

The invention relates to a preparation process of a multiple TiO2 nanotube/PbS/CuS nanocomposite used for quantum dot sensitized solar cells. The multiple TiO2 nanotube/PbS/CuS nanocomposite is prepared mainly by combining a chemical bath method and a hydrothermal method. The method comprises the following steps: shearing and grinding a titanium plate and carrying out ultrasonic cleaning and decontamination in acetone or anhydrous ethanol solution; flushing the cleaned titanium plate with deionized water, and air-drying; placing cleaned titanium plate in the well prepared electrolyte for carrying out electrochemical anodizing; and placing anodized sample of the semi-wall type titanium dioxide nanotube array in the hydrogen peroxide solution for soaking for certain time, and sequentially compounding nanoparticles of PbS/CuS with titanium oxide nanotube by adopting chemical bath method and the hydrothermal method. The method is simple in process, the prepared multi-nano structure is novel, and the conversion efficiency of the solar cell prepared through the structure is improved greatly, thus being beneficial to improvement of performances of quantum dot sensitized solar cells.

Description

technical field [0001] The invention relates to a preparation process of a nano-array material, specifically a nano-array material with TiO 2 Preparation process of nanotube / nano-PbS / nano-CuS multiple nanostructure composites. Background technique [0002] Titanium dioxide (TiO 2 ) as an inorganic functional material has attracted the attention and research applications of many scientific research institutions around the world due to its high efficacy and low production cost, especially in photoelectrochemical water splitting, photocatalytic degradation of pollutants in water, and solar energy Batteries and other fields related to energy conversion. Titanium dioxide is an important wide-bandgap semiconductor functional material. The energy band gaps of the two common crystal structures at room temperature are 3.0 eV (rutile structure) and 3.2 eV (anatase structure). It can absorb the ultraviolet part of sunlight, and the energy of ultraviolet light only accounts for abo...

AI Technical Summary

Problems solved by technology

Titanium dioxide is an important wide-bandgap semiconductor functional material. The energy band gaps of the two common crystal structures at room temperature are 3.0 eV (rutile structure) and 3.2 eV (anatase structure). It can absorb the ultraviolet part of sunlight, and the energy of ultraviolet light only accounts for about 5% of the solar spectrum energy, resulting in low photoelectric conversion efficiency

[0004] Usually based on TiO 2 The quantum dot sensitization material of nanotubes is a narrow-band semiconductor with a high light absorption range. However, although a sensitization material has a wide range, but the peak position is different, the light absorption will always be weak in certain wavelength ranges. The combination of various sensitizing materials can theoretically improve the photoelectric conversion performance, but there are many difficulties in the process and material selection and matching, and it is difficult to be fully utilized.

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