Bridged-ring dithiophene-phenothiazine dye and application thereof in dye-sensitized solar cell

A dye sensitization, solar cell technology, applied in thiazine dyes, organic dyes, circuits, etc., can solve problems such as air pollution and greenhouse effect, and achieve the effects of improving photoelectric performance, high yield, and simple preparation method.

Inactive Publication Date: 2018-07-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the extensive use of traditional fossil energy has also caused global environmental proble

Method used

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  • Bridged-ring dithiophene-phenothiazine dye and application thereof in dye-sensitized solar cell
  • Bridged-ring dithiophene-phenothiazine dye and application thereof in dye-sensitized solar cell
  • Bridged-ring dithiophene-phenothiazine dye and application thereof in dye-sensitized solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Bridged ring dithiophene-phenothiazine dye PTZ1 (n=2, ), the synthetic route is as follows:

[0024]

[0025] (1) Synthesis and characterization of compound 2, the synthetic route is as follows:

[0026]

[0027] Specific steps are as follows:

[0028] In a 50mL single-necked round bottom flask, add compound 1 (200mg, 0.50mmol) and 15mL tetrahydrofuran (THF), and stir in an ice bath; dissolve NBS (N-bromosuccinimide, 96.9mg, 0.55mmol) In 10mL THF, transferred to a constant pressure dropping funnel (with a glass stopper), and slowly added dropwise to the reaction system; after stirring for 2 hours in an ice bath, the reaction was continued for 8 hours at room temperature; after the reaction was completed, The reaction solution was fully transferred to a separatory funnel filled with sufficient water, extracted three times with dichloromethane, dried by adding anhydrous magnesium sulfate, and the filtrate obtained after filtration was evaporated under reduced pre...

Embodiment 2

[0051] The organic dye PTZ1 prepared in embodiment 1 is carried out ultraviolet-visible absorption spectrum test, and concrete test condition and instrument are as follows:

[0052] Solvent: dichloromethane

[0053] Concentration: 1×10 -5 m

[0054] Temperature: room temperature

[0055] Instrument: Shimadzu UV-2450 UV-Vis spectrophotometer.

[0056] The UV-Vis absorption spectrum obtained from the test is shown as figure 1 shown, from figure 1 It can be seen from the figure that the PTZ1 dye molecule mainly has two obvious absorption peaks in the 300-650nm region. Among them, the absorption peak at 300-450nm is mainly the π-π* electronic transition peak, and the absorption peak at 450-650nm is mainly due to intramolecular electron transfer, which is not significantly different from the absorption of ordinary dye molecules. The main difference is that the introduction of bridged dithiophene makes the absorption spectrum red-shifted and the absorption range is wider.

Embodiment 3

[0058] Fabrication of dye-sensitized solar cells

[0059] The organic dye PTZ1 prepared in Example 1 is used as a sensitizer in a dye-sensitized solar cell to prepare a dye-sensitized solar cell based on a dye-based PTZ1 sensitizer, specifically using the dye PTZ1 as a sensitizer for a dye-sensitized solar cell part, will be loaded with nano-titanium dioxide (TiO 2 ) conductive glass substrate soaked in the dye bath solution prepared by dye PTZ1, the dye PTZ1 is adsorbed on the surface of nano-titanium dioxide through the anchoring group (cyanoacetic acid group), thereby preparing a working electrode, and the dye PTZ1 is used as a dye-sensitized solar cell The sensitizer part is the key factor to determine the superior performance of the battery.

[0060] Dye-sensitized solar cells also include the following devices: conductive glass substrate (doped SnO 2 Conductive glass, namely FTO), electrolyte (iodine electrolyte), platinum counter electrode (platinized conductive glass...

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Abstract

The invention discloses a bridged-ring dithiophene-phenothiazine dye and application thereof in a dye-sensitized solar cell. The bridged-ring dithiophene-phenothiazine dye is a pure organic dye by taking phenothiazine as an electron donor, wherein the phenothiazine electron donor is introduced into bridged-ring dithiophene as an extra electron donor, and the bridged-ring dithiophene is 2,2'-bithiophene wrapped with a cyclic alkyl chain, has relatively high steric hindrance, is beneficial to improving of the optical and electrical properties of the dye and has the effects of inhibiting dye molecular aggregation and electron recombination; and meanwhile, cyanoacetic acid groups are introduced as an electron acceptor and anchored groups. The dye is applied to a working electrode of the dye-sensitized solar cell as a sensitizer, constructs a dense layer on the surface of nanometer titanium dioxide of the working electrode, covers the surface of titanium dioxide, can effectively inhibit electron recombination, increases an open circuit voltage and thus effectively improving the optical and electrical properties of the dye-sensitized solar cell.

Description

technical field [0001] The invention relates to the technical field of organic dyes, in particular to sensitizing dyes for dye-sensitized solar cells and applications thereof. Background technique [0002] With the rapid development of economy and society and the improvement of industrialization, the role of energy in the production and life of human society is becoming more and more important. At the same time, with the continuous improvement of the global economic level and the acceleration of industrialization, people's demand for energy continues to increase, and the consumption of traditional fossil energy such as coal and oil is increasing. Traditional fossil energy is facing the plight of depletion. At the same time, the extensive use of traditional fossil energy has also caused global environmental problems such as the greenhouse effect and air pollution, which have seriously affected human production and life. Therefore, finding renewable energy that can meet the f...

Claims

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Application Information

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IPC IPC(8): C09B21/00H01G9/20
CPCY02E10/542C09B21/00H01G9/2059
Inventor 曹德榕华涛
Owner SOUTH CHINA UNIV OF TECH
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