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Electrolyte solution for dye-sensitized solar cells

An electrolyte solution and solvent technology, applied in electrolytic capacitors, circuits, capacitors, etc., can solve problems such as limited solubility, high viscosity of electrolyte solution, and influence on electrolyte function

Active Publication Date: 2009-12-30
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The alkyl imidazole iodonium salt mentioned in the above-mentioned technology is yellow solid such as DMPII, and the solubility in the solvent is limited, and a yellow precipitate will appear when placed for a long time at a concentration of 0.6mol / L, and the viscosity of the electrolyte solution is slightly larger, which affects the Further development of the role of electrolytes
While AMII has a lower viscosity, but the cost is slightly higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Prepare electrolyte solution A, use 3-methoxypropionitrile (MePN) as solvent, add the following components: 0.3mol / L DMPII, 0.4mol / L AMII, 0.1mol / L LiI, 0.1mol / L I 2 , 0.1mol / L GuNCS, and 0.5mol / L TBP.

[0095] To prepare a dye-sensitized solar cell, the dye-adsorbed titanium dioxide photoanode and the platinum-coated counter electrode are face-to-face encapsulated with a heat-sealing film, and the electrolyte solution A prepared according to the above method is divided from the reserved small on the counter electrode. The hole is injected between the electrodes of the dye-sensitized solar cell, and the small hole is finally encapsulated. The obtained battery is battery A.

[0096] According to the literature formula (Mohammad K. Nazeeruddin, Peter Pechy, et al., Engineering of efficient panchromatic sensitizers for nanocrystalline TiO 2-based solar cells, J. Am. Chem. Soc., 2001, 123, 1613-1624) to prepare electrolyte solution B for comparison experiments. Electrolyte solu...

Embodiment 2

[0101] Prepare electrolyte solution D, use MePN as solvent, add the following components: 0.4mol / L DMPII, 0.3mol / L AMII, 0.1mol / L LiI, 0.1mol / L I 2 , 0.1mol / L GuNCS, and 0.5mol / L TBP.

[0102] Prepare the dye-sensitized solar cell, encapsulate the dye-adsorbed titanium dioxide photoanode and the platinum-coated counter electrode face-to-face with a heat-sealing film, and replace the electrolyte solution D prepared by the above method from the reserved small on the counter electrode. Holes are injected between the electrodes of the dye-sensitized solar cell, and finally the holes are encapsulated. The resulting battery is battery D.

[0103] Under laboratory conditions, the photocurrent of the test battery D is 7.7mA.

[0104] The research results of Example 2 show that the electrolyte solution reduces the amount of DMPII used and solves the problem of yellow precipitation in the electrolyte solution. At the same time, the reduced amount of DMPII reduces the viscosity of the electr...

Embodiment 3

[0106] Prepare electrolyte solution E, use MePN as solvent, add the following components: 0.35mol / L DMPII, 0.35mol / L AMII, 0.1mol / L LiI, 0.1mol / L I 2 , 0.1mol / L GuNCS, and 0.5mol / L TBP.

[0107] Prepare the dye-sensitized solar cell, encapsulate the dye-adsorbed titanium dioxide photoanode and the platinum-coated counter electrode face-to-face with a heat-sealing film, and replace the electrolyte solution E prepared by the above method from the reserved small on the counter electrode. Holes are injected between the electrodes of the dye-sensitized solar cell, and finally the holes are encapsulated. The resulting battery is battery E.

[0108] Under laboratory conditions, the photocurrent of the test battery E is 7.8mA.

[0109] The research results of Example 3 show that the electrolyte solution reduces the amount of DMPII used, and solves the problem of yellow precipitation in the electrolyte solution. At the same time, the reduced amount of DMPII reduces the viscosity of the ele...

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Abstract

The invention relates to electrolyte solution for dye-sensitized solar cells, in particular to electrolyte solution. The electrolyte solution comprises i) alkyl substituted imidazolium iodide; ii) 1-allyl-3-methylimidazolium iodide; iii) LiI; iv) I2; and vii) solvent. The invention also relates to application of the electrolyte solution during preparing dye-sensitized solar cells as well as dye-sensitized solar cells comprising the electrolyte solution. The electrolyte solution reduces DMPII dosage and electrolyte solution viscosity, and solves the problem of yellow precipitate in electrolyte solution; therefore, the electrolyte solution is propitious to the transmission of electron and the increase of solar cell efficiency.

Description

Technical field: [0001] The invention relates to an electrolyte solution, in particular to an electrolyte solution that can be used in dye-sensitized solar cells. The invention also relates to the use of the electrolyte solution in the preparation of dye-sensitized solar cells. Background technique: [0002] With the development of human civilization, serious problems caused by energy crisis and environmental pollution have attracted more and more people's attention, and the development of renewable energy is imminent. Among the many renewable energy sources, solar cells are currently the most feasible way to use renewable energy. Relative to monocrystalline silicon cells, which dominate the solar cell market, dye-sensitized solar cells (DSSC), with low-cost advantages, no pollution, good stability, and excellent performance, demonstrate a new development in solar cells. The direction of development. Dye-sensitized solar cells were developed by Swiss Graetzel et al. in 1991 using...

Claims

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Application Information

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IPC IPC(8): H01G9/035H01G9/20H01M14/00H01L51/44H01L51/46H01L51/48H01L51/42
CPCY02E10/542Y02E10/549
Inventor 王雁丁天朋周祥勇刘涛丁哲波
Owner ENN SCI & TECH DEV
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