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Solid electrolyte for dye-sensitized solar cell based on ionic crystal

A technology of solar cells and solid electrolytes, applied in the field of solar cells, can solve the problems of low photoelectric conversion efficiency of dye-sensitized solar cells, easy desorption of dyes, low conductivity, etc., to overcome low conductivity, enhance conductivity, The effect of improving stability

Active Publication Date: 2018-07-24
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the liquid electrolyte generally contains inorganic or organic iodide, iodine, additives, and organic solvents. It has the advantages of high conductivity, fast ion diffusion speed, and good permeability to porous photoanodes, but it is easy to leak, volatile, and difficult to package. , high toxicity, poor stability, and easy desorption of dyes; due to the small amount of solvents such as ethylene carbonate, propylene carbonate, and ionic liquids in the quasi-solid electrolyte, there are still problems of easy leakage and difficult packaging
Solid electrolytes have good long-term stability, but their low conductivity leads to low photoelectric conversion efficiency of dye-sensitized solar cells prepared with solid electrolytes

Method used

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  • Solid electrolyte for dye-sensitized solar cell based on ionic crystal

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Embodiment 1

[0031] A solid electrolyte for dye-sensitized solar cells based on ionic crystals, comprising the following components by weight: 40 parts of cyanoimidazole-type ionic crystals, 3 parts of (4-ferroceneethynyl) aniline modified fullerenes, 5 parts of simple iodine, 5 parts of methylbenzimidazole (MBI).

[0032] The preparation method of described cyanoimidazole type ion crystal comprises the steps:

[0033] 1) Preparation of 1-methyl-4,5-dicyanoimidazole: Dissolve 10 g of 4,5-dicyanoimidazole in 100 g of acetonitrile, and then add 15 g of methyl iodide and 5 g of sodium hydroxide to it, at 40 ° C Stirring and reacting for 8 hours, after filtering, adding water to the reaction system, separating the liquid to take the organic phase, and rotary evaporating to remove the organic solvent, to obtain 1-methyl-4,5-dicyanoimidazole;

[0034] 2) Preparation of cyanoimidazole-type ionic crystals: 15 g of 1-methyl-4,5-dicyanoimidazole prepared in step 1) was dissolved in 60 g of ether, a...

Embodiment 2

[0040] A solid electrolyte for dye-sensitized solar cells based on ionic crystals, comprising the following components by weight: 43 parts of cyanoimidazole-type ionic crystals, 4 parts of (4-ferroceneethynyl) aniline modified fullerenes, 7 parts of simple iodine, 6 parts of butylbenzimidazole (NBB).

[0041] The preparation method of described cyanoimidazole type ion crystal comprises the steps:

[0042] 1) Preparation of 1-ethyl-4,5-dicyanoimidazole: 10 g of 4,5-dicyanoimidazole was dissolved in 120 g of chloroform, and 17 g of ethyl iodide and 6 g of potassium hydroxide were added thereto, at 45 Stir the reaction at ℃ for 8.5 hours, then filter, add water to the reaction system, separate the liquid to take the organic phase, and remove the organic solvent by rotary evaporation to obtain 1-ethyl-4,5-dicyanoimidazole;

[0043] 2) Preparation of cyanoimidazole-type ionic crystals: 17 g of 1-ethyl-4,5-dicyanoimidazole prepared in step 1) was dissolved in 78 g of ether, and ethyl...

Embodiment 3

[0049] A solid-state electrolyte for dye-sensitized solar cells based on ionic crystals, comprising the following components by weight: 46 parts of cyanoimidazole-type ionic crystals, 5 parts of (4-ferroceneethynyl) aniline-modified fullerenes, 7 parts of simple iodine, 7 parts of tert-butylpyridine (TBP).

[0050] The preparation method of described cyanoimidazole type ion crystal comprises the steps:

[0051] 1) Preparation of 1-propyl-4,5-dicyanoimidazole: 10 g of 4,5-dicyanoimidazole was dissolved in 135 g of acetonitrile, and then 18 g of 1-iodopropane and 7.5 g of sodium carbonate were added thereto. Stir and react at 50°C for 9 hours, then filter, add water to the reaction system, separate the liquid to take the organic phase, and remove the organic solvent by rotary evaporation to obtain 1-propyl-4,5-dicyanoimidazole;

[0052] 2) Preparation of cyanoimidazole-type ionic crystals: 18 g of 1-propyl-4,5-dicyanoimidazole prepared in step 1) was dissolved in 80 g of ether,...

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Abstract

The present invention discloses a solid electrolyte for a dye-sensitized solar cell based on ionic crystal. The solid electrolyte comprises the following components, part by weight: 40-50 parts of cyanoimidazole ionic crystal, 3-7 parts of (4-ferroceneacetenyl) aniline modified fullerene, 5-10 parts of elemental iodine and 5-10 parts of additive. The additive is one or more than one of MBI, NBB and TBP. Compared to the prior art, the solid electrolyte for a dye-sensitized solar cell based on ionic crystal provided by the invention is higher in conductivity, better in stability, easy to package, free of organic solvent, better in safety, and more efficient for improvement of the photoelectric conversion efficiency and the work stability of the dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a component of a dye-sensitized solar cell, in particular to a solid electrolyte for a dye-sensitized solar cell based on ionic crystals. Background technique [0002] With the increasing shortage of energy and the increasingly prominent environmental problems, the development of clean and renewable energy has attracted more and more attention, and the research on solar cells for clean and renewable energy devices has also continued to deepen. As one of many solar cells, dye-sensitized solar cells have become the focus of attention in the industry in recent years due to their advantages of high efficiency and low cost. [0003] Electrolyte is the core component of dye-sensitized solar cells. It is mainly responsible for transporting redox pairs and reducing light-excited dyes. Its performance directly affects the efficiency and cycle life of solar cells. Commonly used electrol...

Claims

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Application Information

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IPC IPC(8): H01G9/20
CPCC07F17/02H01G9/2009Y02E10/542
Inventor 程业秀
Owner HUNAN CHENLI NEW MATERIAL CO LTD
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