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Gel electrolyte for dye-sensitized nanocrystal solar cell

A gel electrolyte and solar cell technology, applied in the field of electrolyte material preparation, can solve problems such as dye degradation, complicated sealing process, and increased opportunities for photogenerated charge recombination

Inactive Publication Date: 2012-02-22
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Due to the complicated sealing process, it is easy to cause electrolyte leakage;
[0006] (2) In the liquid electrolyte, the sealant may react with the electrolyte, and the sensitizing dye is easy to desorb;
[0007] (3) There are other side reactions in the electrolyte except the oxidation-reduction cycle, which increases the chance of recombination of photogenerated charges due to ion reverse migration and reduces the photoelectric conversion efficiency;
[0008] (4) The solvent is volatile at high temperature and may interact with the sensitizing dye to cause dye degradation;
However, ionic liquids still have some mobility, which still affects the long-term stability and encapsulation characteristics of dye-sensitized solar cells

Method used

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Embodiment 1

[0026] A gel electrolyte for a dye-sensitized nanocrystalline solar cell, the gel electrolyte includes an organic molten salt and a nano-tin oxide gel, and the volume ratio of the organic molten salt to the nano-tin oxide gel is 50:7; the organic molten salt The cation is the imidazolium cation substituted by low molecular weight polyethylene oxide, and the structure of the imidazolium cation is as follows:

[0027]

[0028] Among them, n is 9-14; R group is H, OH, OCH 3 non-polymerizable group or CH 2 = CHCOO-, CH 2 =CCH 3 COO-polymerizable group, the anion of the molten salt is fluoride ion, the molecular weight of the low molecular weight polyethylene oxide is 450; the conductivity of the gel electrolyte is 15.3mS·cm -1 .

Embodiment 2

[0030] A gel electrolyte for a dye-sensitized nanocrystalline solar cell, the gel electrolyte includes an organic molten salt and a nano-tin oxide gel, and the volume ratio of the organic molten salt to the nano-tin oxide gel is 5:1; the organic molten salt The cation is the imidazolium cation substituted by low molecular weight polyethylene oxide, and the structure of the imidazolium cation is as follows:

[0031]

[0032] Among them, n is 9-14; R group is H, OH, OCH 3 non-polymerizable group or CH 2 = CHCOO-, CH 2 =CCH 3 COO-polymerizable group, the anion of the molten salt is fluoride ion, the molecular weight of the low molecular weight polyethylene oxide is 450; the conductivity of the gel electrolyte is 16.5mS cm -1 .

Embodiment 3

[0034] A gel electrolyte for dye-sensitized nanocrystalline solar cells, the gel electrolyte contains organic molten salt, nano tin oxide gel and Al 2 o 3 Nano particle gel, organic molten salt, nano tin oxide gel, Al 2 o 3 The volume ratio of the nanoparticle gel is 50:15:1; the cation of the organic molten salt is a polyethylene oxide substituted imidazolium cation of low molecular weight, and the structure of the imidazolium cation is as follows:

[0035]

[0036] Among them, n is 9-14; R group is H, OH, OCH 3 non-polymerizable group or CH 2 = CHCOO-, CH 2 =CCH 3 COO-polymerizable group, the anion of the molten salt is fluoride ion; the molecular weight of the low molecular weight polyethylene oxide is 550; the conductivity of the gel electrolyte is 18.7mS·cm -1 .

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Abstract

The invention relates to a gel electrolyte for a dye-sensitized nanocrystal solar cell. The gel electrolyte for the dye-sensitized nanocrystal solar cell contains an organic molten salt and a nanometer tin dioxide gel in a volume ratio of 50:(7-15). A preparation method of the gel electrolyte comprises the following steps of: at first, reacting polyethylene oxide with a low molecular weight with thionyl fluoride to generate fluorinated polyethylene oxide, and reacting the fluorinated polyethylene oxide with 1-methylimidazole in N,N-dimethylformamide to obtain the molten salt with fluoride ions as anions; then preparing the nanometer tin dioxide gel from tin dioxide; and finally, mixing the molten salt with the nanometer tin dioxide gel so as to obtain stable gel electrolyte by ageing and purifying. The gel electrolyte prepared by the preparation method has the same properties as a liquid electrolyte, and has the advantages of high stability, high conductivity and long service life. The gel electrolyte provided by the invention plays an important role in the preparation field of the dye-sensitized nanocrystal solar cell and has a wide application prospect.

Description

technical field [0001] The invention relates to a preparation method for dye-sensitized nanocrystalline solar cell gel electrolyte, belonging to the technical field of electrolyte material preparation. Background technique [0002] The petrochemical resources that can be exploited at present can only be maintained until around 2020, and the energy crisis is an urgent problem that needs to be solved. Solar energy is an inexhaustible green resource and the best way to solve my country's energy structure and environmental problems. The development and production of solar cells have broad application prospects. At present, monocrystalline silicon and amorphous silicon solar cells are based on the photovoltaic effect of semiconductors. Although their conversion efficiency is high, they are difficult to popularize due to their complex process, high price and demanding materials. In the 1990s, the University of Lausanne in Switzerland The dye-sensitized nanocrystalline solar ce...

Claims

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Application Information

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IPC IPC(8): H01G9/022H01G9/20H01M14/00
CPCY02E10/542
Inventor 徐征赵谡玲徐叙瑢
Owner BEIJING JIAOTONG UNIV
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