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Organic dye and dye-sensitized solar cell prepared thereby

A technology for solar cells and organic dyes, applied in the field of dye-sensitized solar cells, can solve problems such as limiting practical applications

Active Publication Date: 2012-09-19
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sensitizing materials are a key material for improving battery efficiency. 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, its practical application is limited due to its high price and limited resources of precious metals

Method used

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  • Organic dye and dye-sensitized solar cell prepared thereby
  • Organic dye and dye-sensitized solar cell prepared thereby
  • Organic dye and dye-sensitized solar cell prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: the preparation of the organic dye of described chemical structural formula I

[0058] Its synthetic route is as follows:

[0059]

[0060] The specific synthesis method is:

[0061] Compound a 24g, POCl 3 9.8mL and 140mL of DMF were reacted at 90°C for 12h under the protection of argon, cooled, added 50mL of saturated sodium acetate solution and reacted for 0.5h, extracted with chloroform, washed with water, dried over anhydrous sodium sulfate, and the solvent was removed. The residue was obtained by column chromatography to obtain compound b ; NaBH 4 0.7g was dissolved in 40mL of 0.1M sodium hydroxide solution, slowly added to 18.6g of compound b in 130mL of ethanol solution, reacted at room temperature for 4 hours, diluted with 100mL of water, extracted with chloroform, washed with water, concentrated, and obtained compound c by column chromatography; c 12.9g with PPh 3 Dissolve 9.32 g of HBr in 100 mL of chloroform, heat to reflux for 4 h, con...

Embodiment 2

[0063] Embodiment 2: the preparation of the organic dye of described chemical structural formula II

[0064] According to the same steps and conditions as in Example 1, 3,4-ethanedithiophene-2-carbaldehyde was used instead of 2-selenophenecarbaldehyde to prepare the organic dye with chemical structure II.

[0065] The nuclear magnetic data of the organic dye of this chemical structural formula II: 1 H NMR (400MHz, DMSO-d 6 )δ: 0.88(t, 6H), 1.31(m, 8H), 1.40(m, 4H), 1.70(m, 4H), 3.38(br, 2H), 3.44(br, 2H), 3.94(t, 4H ), 6.68(d, 2H), 6.92(d, 4H), 7.06(d, 4H), 7.09(d, 1H), 7.13(d, 1H), 7.48(d, 2H), 8.23(s, 1H) , 13.68 (s 1H).

Embodiment 3

[0066] Embodiment 3: Preparation of dye-sensitized solar cells by the organic dye of the chemical structural formula I

[0067] TiO with a particle size of 20nm 2 Colloid coating on fluorine-doped SnO 2 On conductive glass, nano-TiO is formed 2 The crystal film was baked at 400 °C for 12 hours to obtain TiO with a thickness of 7 μm 2 crystal film; the obtained TiO 2 Using the same method on the layer film, the particle size is 400nmTiO 2 , fired TiO with a thickness of 5 μm 2 Light scattering film; obtained TiO 2 Nanostructured bilayer membrane electrodes. Specific preparation of TiO 2 Nanocrystalline and TiO 2 For the method of nanostructured double-layer membrane electrode, see the article (Wang P. et al., Enhance the Performance of Dye-Sensitized SolarCells by Co-grafting Amphiphilic Sensitizer and Hexadecylmalonic Acidon TiO 2 Nanocrystals, J. Phys. Chem. B., 107, 2003, 14336).

[0068] Prepared TiO 2 The nanostructure double-layer membrane electrode is immerse...

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Abstract

The invention relates to an organic dye and a dye-sensitized solar cell produced from the organic dye, in particular to an organic dye taking thiophene and 3,4-ethyl disulfide thiophene or the derivatives of the thiophene and the 3,4-ethyl disulfide thiophene as conjugated units and a dye-sensitized solar cell produced from the organic dye. The organic dye does not need expensive raw materials including metal such as ruthenium and decontaminant such as dextran glucan and has high synthetic yield of 60-70 percent in total; in addition, the organic dye has the maximum spectral absorption peak of over 580 nm, the molar extinction coefficient of over 36*10<3>M<-1>cm<-1>, wider sunlight absorption range and other excellent performance superior to the performance of ruthenium dye and most organic dye. The dye-sensitized solar cell produced from the organic dye has the maximum quantum conversion efficiency of 94 percent and the maximum monochromatic incident photon-to-electron conversion efficiency (IPCE) of over 7.0 percent.

Description

technical field [0001] The invention relates to a new organic dye and a dye-sensitized solar cell prepared therefrom, in particular to an organic dye with selenophene, 3,4-ethylenedithiothiophene or their derivatives as a conjugated unit and the preparation of the organic dye dye-sensitized solar cells. Background technique [0002] With the increasing scarcity of fossil energy, how to develop alternative energy has attracted more and more attention. As a renewable clean energy, solar energy is an ideal energy for human long-term survival. In 1991, the Swiss Federal Institute of Technology The team reported the breakthrough work of high-efficiency dye-sensitized nanocrystalline solar cells (Nature 1991, 353, 737), which brought hope for human beings to provide low-cost, high-efficiency, and long-lived green renewable energy. Sensitizing materials are a key material for improving battery efficiency. At present, the dye sensitizers with the best performance are organometal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B57/00H01G9/20H01M14/00H01L51/42
CPCY02E10/542Y02E10/549
Inventor 张广良衣智慧吕学举李仁志曹祎明王鹏
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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