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Cu2ZnSnS4 / MWCNT nano composite counter electrode for dye-sensitized solar cell and preparation method thereof

A technology of solar cells and dye sensitization, which is applied in the field of nanomaterials and solar cells, can solve the problems of low cell efficiency and poor conductivity, and achieve the effects of simple manufacturing process, strong corrosion resistance, and low preparation cost

Inactive Publication Date: 2014-05-14
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cu 2 ZnSnS 4 Quaternary chalcogenides have good electrocatalytic ability and have been used in DSSC as counter electrode materials, but their conductivity is not ideal, resulting in low battery efficiency

Method used

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  • Cu2ZnSnS4 / MWCNT nano composite counter electrode for dye-sensitized solar cell and preparation method thereof
  • Cu2ZnSnS4 / MWCNT nano composite counter electrode for dye-sensitized solar cell and preparation method thereof
  • Cu2ZnSnS4 / MWCNT nano composite counter electrode for dye-sensitized solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1 2

[0030] Example 1 Titanium dioxide nanoporous membrane-based Cu 2 ZnSnS 4 / MWCNT counter electrode DSSC

[0031] The specific steps of the preparation method of the DSSC new structure of the present embodiment are as follows:

[0032] (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 conductive glass into acetone, isopropanol, deionized water (volume ratio v 1 :v 2 : v 3 =1:1:1) in a mixed solution of ultrasonic cleaning for 30min, and blow dry 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.

[0033] (2) Counter electrode preparation: Cu 2 ZnSnS 4 / MWCNT nanoparticles were dissolved in deionized water (0.05g / mL), ultrasonically d...

Embodiment 2 2

[0038] Example 2 Titanium dioxide nanotube-based Cu 2 ZnSnS 4 / MWCNT counter electrode DSSC

[0039] The specific steps of the preparation method of the DSSC new structure of the present embodiment are as follows:

[0040] (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 counter electrode 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 conditions were the same as the first anodic oxidation...

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Abstract

The invention relates to a Cu2ZnSnS4 / MWCNT nano composite counter electrode for a dye-sensitized solar cell and a preparation method thereof. The method comprises following steps that: (1) a hot solvent method is used to synthesize a Cu2ZnSnS4 nanoparticle with a diameter of 200 to 300 nanos; (2) an MWCNT is immersed in a sulfuric acid and nitric acid mixed solution, so as to improve dispersibility of the mixed solution; (3) a Cu2ZnSnS4 / MWCNT nano composite material is stirred and carries out ultrasonic processing so that the composite material is mixed evenly, and the Cu2ZnSnS4 / MWCNT is dissolved in deionized water and forms "ink" by the ultrasonic processing; and (4) a spinning coating method is used so that black "ink" is coated on a conductive substrate, and then the Cu2ZnSnS4 / MWCNT composite counter electrode is obtained by annealing in 450 to 550 DEG C for 0.5 to 2 hours. According to the method, the Cu2ZnSnS4 / MWCNT having good corrosion resistance serves as the counter electrode of the dye-sensitized solar cell, so as to achieve the large surface area, good catalytic and conductive properties, and low production cost; and the battery which is manufactured with adoption of the preparation method, has the same photoelectric conversion efficiency as the battery based on a conventional Pt electrode, is suitable for application to the dye-sensitized solar cell, and is beneficial to the industrialization development of the dye-sensitized solar cell.

Description

technical field [0001] The present invention relates to a kind of nanometer material and solar cell, especially a kind of Cu for dye-sensitized solar cell 2 ZnSnS 4 / MWCNT nanocomposite counter electrode and its preparation method. Background technique [0002] Energy is an important material basis for national economic development. The current energy structure is dominated by fossil energy such as coal, oil, and natural gas. With the rapid economic development, fossil energy is decreasing and non-renewable. The energy crisis is a major social problem we face. In the process of fossil energy utilization, there are also many negative impacts on the environment, climate and human health. It is imminent to transform the existing energy structure and develop environmentally friendly renewable new energy materials. Solar energy, which is the most abundant resource and clean and pollution-free, has attracted more and more attention. Converting solar energy directly into ele...

Claims

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Application Information

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IPC IPC(8): H01G9/042B82Y30/00B82Y40/00
Inventor 朱磊强颖怀赵宇龙顾修全宋端鸣宋昌斌顾永琴王波朱建晶
Owner CHINA UNIV OF MINING & TECH
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