Preparation method of porous nanocrystalline Cu2S counter electrode of quantum-dot-sensitized solar cell

A solar cell and quantum dot sensitization technology, which is applied in the field of solar cells, can solve problems such as limiting the improvement of battery performance, insufficient bonding, and large charge loss, and achieve the effects of promoting reduction regeneration, increasing contact surface, and low cost

Inactive Publication Date: 2015-02-04
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the above methods, Cu 2 S has good catalytic activity and is suitable for the preparation of counter electrodes for quantum dot-sensitized solar cells, usually Cu prepared from copper foil. 2 The surface of the S counter electrode is a dense layer type with a small specific surface area, so the catalytic sites are low, which limits the improvement of battery performance
Cu 2 S and graphene, carbon black and other composite counter electrodes, there will be shortcomings such as insufficient bonding between particles and between particles and conductive matrix, and large charge loss.

Method used

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  • Preparation method of porous nanocrystalline Cu2S counter electrode of quantum-dot-sensitized solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The conductive substrate was ultrasonically cleaned with deionized water and absolute ethanol for 15 minutes, and then dried; 0.03 molar concentration of copper acetate and 0.04 molar concentration of thioacetamide were ultrasonically dissolved in diethylene glycol, and then heated at 170 The two solutions were mixed and reacted for 2.5 hours under the condition of an oil bath to prepare Cu 2 S nanoparticles, and then prepare a slurry with ethanol at a mass ratio of 1:1; apply the above slurry evenly on the FTO conductive glass by the scraper coating method, and then sinter at 400°C for 40min in an argon atmosphere to obtain Cu 2 S porous nanocrystalline counter electrode.

[0023] The prepared Cu 2 The S porous nanocrystal counter electrode is assembled into a quantum dot sensitized battery for battery performance testing. The photoanode is made of nano-titanium oxide porous film prepared by the scraping method, and the quantum dot sensitizer is made of continuous io...

Embodiment 2

[0025] The conductive substrate was ultrasonically cleaned with deionized water and absolute ethanol for 5 minutes, and then dried; 0.04 molar concentration of copper acetate and 0.05 molar concentration of thioacetamide were ultrasonically dissolved in diethylene glycol, and then heated at 180 The two solutions were mixed and reacted for 3 hours under the condition of oil bath to prepare Cu 2 S nanoparticles, and then prepare a slurry with ethanol at a mass ratio of 1:2; the above slurry is uniformly coated on the FTO conductive glass by a scraper coating method, and then sintered at 450 ° C for 60 minutes in an argon atmosphere, namely Get Cu 2 S porous nanocrystalline counter electrode.

[0026] The process of assembling the battery is the same as in Example 1, and the test results are shown in Table 1.

Embodiment 3

[0028]The conductive substrate was ultrasonically cleaned with deionized water and absolute ethanol for 10 minutes, and then dried; 0.02 molar concentration of copper acetate and 0.03 molar concentration of thioacetamide were ultrasonically dissolved in diethylene glycol, and then heated at 160 Under the condition of ℃ oil bath, the two solutions were mixed and reacted for 2 hours to prepare Cu 2 S nanoparticles, and then prepare a slurry with ethanol at a mass ratio of 2:1; the above slurry is uniformly coated on the FTO conductive glass by a scraper coating method, and then sintered at 350 ° C for 30 minutes in an argon atmosphere, that is, Get Cu 2 S porous nanocrystalline counter electrode.

[0029] The process of assembling the battery is the same as in Example 1, and the test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of solar cells and energies, and particularly relates to a preparation method of a porous nanocrystalline Cu2S counter electrode of a quantum-dot-sensitized solar cell. The preparation method comprises the steps of: regarding copper acetate and thioacetamide as precursors; obtaining 20-100 nm cuprous sulfide (Cu2S) nanometer particles through solvothermal reaction; preparing the cuprous sulfide (Cu2S) nanometer particles and ethanol into a thick liquid; forming 5-10 microns Cu2S nanocrystalline porous film on a conductive base body by utilizing a knife coating method, a silk screen print method or a spin-coating method; sintering at 300-500 DEG C in an inert atmosphere or vacuum for 10-60 min to obtain a battery electrode. The prepared Cu2S nanometer porous counter electrode extremely increases contact area of the counter electrode and electrolyte, further increases catalytic reaction site of the Cu2S and the electrolyte, and improves performance of the solar cell. In addition, the preparation method of the porous nanocrystalline Cu2S counter electrode of the quantum-dot-sensitized solar cell is simple in preparation technology, relatively low in cost and has wide application foreground and wide research values.

Description

technical field [0001] The invention relates to the technical field of solar cells, and introduces a Cu 2 Preparation method of S porous nanocrystalline counter electrode. Background technique [0002] With the depletion of non-renewable energy and the continuous increase of energy consumption, the energy problem has become a serious challenge for the survival and development of all human beings. Finding and effectively utilizing new energy sources is a major issue that must be solved by mankind in the 21st century. As a clean and inexhaustible energy source, solar energy is a good choice. At present, the widely used crystalline silicon solar cell technology has been developed and matured, and the energy conversion efficiency exceeds 20%, but its high cost limits its popularization. As the third generation of solar cells, quantum dot-sensitized solar cells have a unique quantum confinement effect and multi-exciton excitation effect, making the theoretical conversion effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20
Inventor 田建军刘晓光吕丽丽沈婷李波
Owner UNIV OF SCI & TECH BEIJING
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