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Preparation method for NiS2/CoS2 counter electrode of dye-sensitized solar cell

A technology of solar cells and dye sensitization, applied in the field of solar cells, can solve the problems of being unsuitable for large-scale applications and expensive electrode materials, and achieve the effects of increasing catalytic active sites, improving photoelectric conversion efficiency, and simple operation

Active Publication Date: 2017-07-14
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing dye-sensitized solar cell counter electrode material is expensive and not suitable for large-scale application, and provides a preparation method of the dye-sensitized solar cell counter electrode

Method used

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  • Preparation method for NiS2/CoS2 counter electrode of dye-sensitized solar cell
  • Preparation method for NiS2/CoS2 counter electrode of dye-sensitized solar cell
  • Preparation method for NiS2/CoS2 counter electrode of dye-sensitized solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 The concentration ratio of potassium persulfate and nickel sulfate is 1:1 to prepare counter electrode

[0017] Pour the mixed solution containing potassium persulfate, nickel sulfate and ammonia water (ammonia is 25%) into the glass vessel with the FTO conductive substrate, control the molar concentration of nickel sulfate in the mixed solution to be 0.4mol / L, persulfuric acid The molar concentration of potassium is 0.4mol / L, the volume ratio of ammonia water to deionized water is 1:9, let it stand for 30 minutes, take out the FTO conductive substrate, wash and dry it repeatedly with deionized water and absolute ethanol, and grow in situ on the surface of FTO Obtain the precursor; put the FTO containing the precursor into the concentration of 0.1mol / L cobalt nitrate solution and soak it for 10min, take it out and dry it; put the FTO and sulfur powder soaked in the cobalt nitrate solution into the vacuum tube furnace, the sulfur source At one end of the air...

Embodiment 2

[0024] Example 2 The volume ratio of ammonia water to deionized water is 1:5 to prepare the counter electrode

[0025] Pour the mixed solution containing potassium persulfate, nickel sulfate and ammonia water (ammonia is 25%) into the glass vessel with the FTO conductive substrate, and control the molar concentration of nickel sulfate in the mixed solution to be 0.4mol / L, persulfuric acid The molar concentration of potassium is 0.4mol / L, the volume ratio of ammonia water and deionized water is 1:5, let stand for 30min, take out the FTO conductive substrate, wash and dry repeatedly with deionized water and absolute ethanol, and grow in situ on the surface of FTO Obtain the precursor; put the FTO containing the precursor into the concentration of 0.1mol / L cobalt nitrate solution and soak it for 10min, take it out and dry it; put the FTO and sulfur powder soaked in the cobalt nitrate solution into the vacuum tube furnace, the sulfur source At one end of the air vent, the molar ma...

Embodiment 3

[0031] Example 3 The FTO conductive substrate was placed in a glass vessel for 15min, 30min, and 60min to prepare a counter electrode

[0032]Pour the mixed solution containing potassium persulfate, nickel sulfate and ammonia water (ammonia is 25%) into the glass vessel with the FTO conductive substrate, and control the molar concentration of nickel sulfate in the mixed solution to be 0.4mol / L, persulfuric acid The molar concentration of potassium is 0.4mol / L, the volume ratio of ammonia water to deionized water is 1:9, let it stand for 15min, 30min, 60min, take out the FTO conductive substrate, wash and dry repeatedly with deionized water and absolute ethanol, and place it in the FTO The precursor was obtained by in-situ growth on the surface; the FTO containing the precursor was soaked in a 0.1mol / L cobalt nitrate solution for 10 minutes, then taken out and dried; the FTO and sulfur powder soaked in the cobalt nitrate solution were placed in a vacuum tube furnace In the proc...

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Abstract

The invention discloses a preparation method for a NiS2 / CoS2 counter electrode of a dye-sensitized solar cell. The preparation method comprises the steps of pouring a mixed solution containing potassium persulfate, nickel sulfate and ammonia water into glass ware loaded with an FTO conductive substrate, allowing the mixed solution to stand, performing washing and drying, and performing in-situ growth on an FTO surface to obtain a precursor; placing the precursor in cobalt nitrate solution for immersion, and taking out and drying the product; and respectively placing the FTO and a sulfur source which are immersed by the cobalt nitrate solution in a vacuum tubular furnace, rising a temperature to 350-550 DEG C under argon protection, performing heat preservation for 2 hours, and obtaining the NiS2 / CoS2 counter electrode after cooling. The preparation process for the NiS2 / CoS2 counter electrode, disclosed by the invention, is simple, a heterojunction of a nanosheet and nanoparticles is formed, the catalytic active sites of the electrode are added, a nanosheet structure growing perpendicularly is beneficial for diffusion of an electrolyte, the diffusion resistance is reduced, so that the NiS2 / CoS2 counter electrode has higher electrocatalytic activity, and the photoelectric conversion efficiency is improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a counter electrode of a dye-sensitized solar cell and a preparation method thereof. Background technique [0002] With the rapid development of the world economy, the consumption of fossil fuels is accelerating, and the resulting energy crisis and environmental pollution have become urgent problems for the world and mankind. The energy directly radiated from the sun to the earth is rich, widely distributed, renewable, and does not pollute the environment. It is an ideal alternative energy recognized by the international community. Therefore, solar cells as photoelectric conversion devices have attracted the attention of scientific circles around the world. [0003] Since the first appearance of dye-sensitized solar cells in 1991, it has attracted widespread attention and research interest due to its low cost, relatively high photoelectric conversion efficiency, and simple manufacturing process. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042H01G9/048
CPCY02E10/542H01G9/2022
Inventor 孙小华李发新汪佳丽鲍潮郑力
Owner CHINA THREE GORGES UNIV
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