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Pure organic dye containing conjugated units of different heterocyclic rings and derivatives thereof and application thereof in dye-sensitized solar cell

A technology of organic dyes and derivatives, applied in the field of pure organic dyes, can solve the problems of high price, limited practical application of precious metal resources, weak absorption spectrum, etc.

Inactive Publication Date: 2009-09-30
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dye sensitizers with the best performance are organometallic sensitizers containing noble metals, such as polypyridine ruthenium complexes (J.Am.Chem.Soc.2008, 130, 10720-10728), however due to its higher The limited price and precious metal resources limit its practical application
Compared with polypyridine ruthenium complexes, pure organic dyes without noble metals have the characteristics of low cost, high extinction coefficient and strong structure controllability, but their absorption spectrum is weaker than that of ruthenium dyes, so it is difficult to achieve higher efficiency

Method used

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  • Pure organic dye containing conjugated units of different heterocyclic rings and derivatives thereof and application thereof in dye-sensitized solar cell
  • Pure organic dye containing conjugated units of different heterocyclic rings and derivatives thereof and application thereof in dye-sensitized solar cell
  • Pure organic dye containing conjugated units of different heterocyclic rings and derivatives thereof and application thereof in dye-sensitized solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Embodiment 1: the preparation of the pure organic dye that contains different kinds of heterocycles and derivatives conjugated units thereof of chemical structural formula I

[0100] The synthetic route is as follows:

[0101]

[0102] Structural formula is the synthesis of the material of (1):

[0103] In the reactor, 11.14 g (67 mmol) of dithiophene was dissolved in a mixed solvent of 90 ml of chloroform and 40 ml of glacial acetic acid, and cooled to -15°C. Add 13.73 milliliters (268 mmol) of liquid bromine dropwise, rise to room temperature and react for 5 hours, then heat up to reflux for 24 hours, cool to room temperature, add 100 milliliters of 10% potassium hydroxide aqueous solution by mass, extract with chloroform, and use anhydrous magnesium sulfate to dry. After spinning off the solvent, the product (1) was obtained by column chromatography with a yield of 69%.

[0104] Structural formula is the synthesis of the material of (2):

[0105] In the reacto...

Embodiment 2

[0129] Example 2: Preparation of dye-sensitized solar cells from pure organic dyes of chemical structural formula I containing different heterocycles and their derivatives conjugated units

[0130] The photoanode (light-absorbing layer) of the dye-sensitized solar cell adopts a mesoporous double layer, and the underlying film is made of 20nm TiO 2 Composed of nanocrystals, the thickness is 7μm, and the upper film thickness is made of 400nm TiO 2 Composed of light-scattering particles with a thickness of 5 μm. Preparation of TiO 2 Nanocrystalline and TiO 2 For the method of nanostructured double-layer film electrodes, see the article (Wang P. et al., Enhance the Performance of Dye-Sensitized Solar Cells by Co-grafting AmphiphilicSensitizer and Hexadecylmalonic Acid on TiO 2 Nanocrystals, J. Phys. Chem. B., 107, 2003, 14336).

[0131] Prepared TiO 2 The nanostructured double-layer membrane electrode is soaked in acetonitrile / tert-butanol containing 300 μM of the dye of stru...

Embodiment 3

[0133] Example 3: Dye-sensitized solar cells prepared from pure organic dyes of chemical structure II containing different heterocycles and their derivatives conjugated units

[0134]

[0135] The pure organic dyes containing different kinds of heterocyclic rings and their derivatives conjugated units of chemical structural formula II used are 4,4'-dimethylsilyl-2,2'-bithiophene, using the steps of Example 1 and conditional synthesis.

[0136] The dye-sensitized solar cell was prepared according to the method in Example 2, and the parameters of the obtained dye-sensitized solar cell are shown in the appended table of the instruction manual.

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Abstract

The invention provides a pure organic dye containing conjugated units of different heterocyclic rings and derivatives thereof and application thereof in a dye-sensitized solar cell. The pure organic dye belongs to molecules of a D-phi-A structure. Segments of a donor, a phi conjugated system and a receptor are properly adjusted and controlled respectively to form the pure organic dye with wide spectral response and high molar extinction coefficient. The absorption spectrum of the pure organic dye is over 570 nanometers already close to the absorption of ruthenium dye; and when the pure organic dye is applied to the dye-sensitized solar cell, the photoelectric conversion efficiency of more than 10 percent is obtained, so the dye is the current most efficient and stable pure organic dye.

Description

technical field [0001] The invention relates to pure organic dyes containing different kinds of heterocycles and their derivatives' conjugated units and their application in dye-sensitized solar cells. Background technique [0002] Since the beginning of the 21st century, the problems of resource shortage and environmental pollution have become increasingly prominent, and people have made various attempts to find energy sources that can replace traditional fossil fuels to solve the looming energy crisis. Among the many renewable energy sources, solar energy is undoubtedly the most ideal clean energy, and photoelectric conversion through solar cells is one of the main ways for human beings to utilize solar energy. Among solar cells, silicon solar cells occupy the main part of solar cells due to their high conversion rate and mature technology. However, silicon solar cells have high production costs and difficulties in improving cell efficiency, and raw materials are expensive...

Claims

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Application Information

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IPC IPC(8): C09B57/00H01G9/20H01M14/00H01L51/42
CPCY02E10/542Y02E10/549
Inventor 王鹏曾望东许名飞白羽张静
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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