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Cu3SnS4/Cu2SnSe3 composite photocathode for photoelectrochemical solar cell and preparation method thereof

A solar cell and photoelectrochemical technology, applied in the fields of nanomaterials and solar cells, can solve problems such as unsatisfactory conversion efficiency, and achieve the effects of simple manufacturing process, strong corrosion resistance and low preparation cost

Inactive Publication Date: 2014-04-09
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the commonly used nickel oxide photocathode matches the energy band of the titanium dioxide photoanode, the conversion efficiency has been unsatisfactory, and there is still a big gap with the efficiency of traditional photoelectrochemical solar cells.

Method used

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  • Cu3SnS4/Cu2SnSe3 composite photocathode for photoelectrochemical solar cell and preparation method thereof
  • Cu3SnS4/Cu2SnSe3 composite photocathode for photoelectrochemical solar cell and preparation method thereof
  • Cu3SnS4/Cu2SnSe3 composite photocathode for photoelectrochemical solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 2

[0028] Example 1 Titanium dioxide nanoporous membrane-based Cu 3 SnS 4 / Cu 2 SnSe 3 Composite Photocathode Photoelectrochemical Solar Cells

[0029] The concrete steps of the preparation method of the photoelectrochemical solar cell new structure of embodiment are as follows:

[0030] (1) Photoanode preparation: take a piece of conductive glass (FTO), and cut it into glass pieces of the required size with a glass knife. Put the conductive glass into a mixed solution of acetone, isopropanol, and deionized water (volume ratio v1:v2:v3=1:1:1) and ultrasonically clean it for 30 minutes, then dry it with nitrogen. A titanium dioxide porous film was coated on the conductive surface by spin coating, and annealed at 450 °C for 1 h. The photoanode can be prepared by immersing the sample in 3mM di-tetrabutylammonium-bis(isothiocyano)bis(2,2'-bipyridyl-4,4'-dicarboxy)ruthenium (N719) solution for 24h.

[0031] Composite photocathode preparation: the Cu 3 SnS 4 Nanoparticles were ...

Embodiment 2 2

[0036] Example 2 Titanium dioxide nanotube-based Cu 3 SnS 4 / Cu 2 SnSe 3 Photocathode Photoelectrochemical Solar Cells

[0037] The specific steps of the preparation method of the photoelectrochemical solar cell new structure of the present embodiment are as follows:

[0038] (1) Preparation of titanium dioxide nanotubes: A piece of titanium foil (0.25 mm, 99.6%) was soaked in acetone, isopropanol, and deionized water, ultrasonically cleaned for 15 min, and dried with nitrogen. The titanium foil and the platinum photocathode were placed in parallel in a two-electrode system for anodic oxidation reaction, in which the electrolyte was ethylene glycol containing 2vol% deionized water and 0.25wt% ammonium fluoride, the input voltage was a constant voltage of 60V, and anodized for 3h The final sample was rinsed and dried with nitrogen, placed in a muffle furnace for annealing at 450°C for 1 hour, and the sample was taken out for the second anodic oxidation for 1 hour (other con...

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Abstract

The invention relates to a Cu3SnS4 / Cu2SnSe3 composite photocathode for a photoelectrochemical solar cell and a preparation method of the Cu3SnS4 / Cu2SnSe3 composite photocathode. The preparation method includes the steps that firstly, Cu3SnS4 nano-particles with the diameter ranging from 200 nanometers to 300 nanometers and Cu2SnSe3 nano-particles with the diameter ranging from 250 nanometers to 350 nanometers are synthesized through the solvothermal method; secondly, mechanical agitation and ultrasonic treatment are carried out on the Cu3SnS4 nano-particles and the Cu2SnSe3 nano-particles respectively, and the Cu3SnS4 nano-particles and the Cu2SnSe3 nano-particles are dissolved in deionized water to form 'ink' through ultrasonic treatment; thirdly, the black 'ink' is applied to a conducting substrate, and then annealing is carried out for 0.5-1h under the temperature of 450DEG C-550DEG C to obtain the mesoporous Cu3SnS4 / Cu2SnSe3 composite photocathode. According to the method, the mesoporous Cu3SnS4 / Cu2SnSe3 composite photocathode adopted as the photocathode of the photoelectrochemical solar cell is good in corrosion resistance, large in specific area, good in catalytic performance and conductivity and low in production cost; the photoelectric conversion efficiency of the cell prepared through the method is as high as that of a traditional Pt counter electrode, and therefore the method is suitable for industrialized production of photoelectrochemical solar cells.

Description

technical field [0001] The present invention relates to a kind of nanometer material and solar cell, especially a kind of Cu for photoelectrochemical solar cell 3 SnS 4 / Cu 2 SnSe 3 Composite photocathode and its preparation method. Background technique [0002] Mineral energy such as coal, oil and natural gas is increasingly scarce and non-renewable, and the energy structure needs to be adjusted urgently. At the same time, problems such as air pollution and environmental damage caused by the use of mineral energy are becoming more and more serious. It is imminent to find other energy sources to replace fossil energy sources. Clean, pollution-free and inexhaustible solar energy has received more and more attention. Electric energy transmission is safe and economical, and production and use are convenient. Converting solar energy directly into electrical energy is one of the most ideal ways to utilize solar energy. A solar cell is a device that directly converts light e...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20
Inventor 赵宇龙朱磊强颖怀顾修全顾永琴宋端鸣宋昌斌王波朱建晶
Owner CHINA UNIV OF MINING & TECH
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