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Related Concept Videos

Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
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Effective solid electrolyte based on benzothiazolium for dye-sensitized solar cells.

Lu Han1, Ye Feng Wang, Jing Hui Zeng

  • 1School of Chemistry & Chemical Engineering, ‡School of Materials Science and Engineering, and §Shaanxi Provincial Key Laboratory of Macromolecular Science, Chang'an Campus, Shaanxi Normal University , Xi'an 710620, China.

ACS Applied Materials & Interfaces
|December 4, 2014
PubMed
Summary

New dicationic conductors based on thiazole/benzothiazole were developed as solid-state electrolytes for dye-sensitized solar cells (DSSCs). These advanced electrolytes achieved a notable photoelectric conversion efficiency of 7.90%.

Keywords:
benzothiazolium,ion-conductordicationicelectrolytess-DSSCs

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Solid-state electrolytes are crucial for enhancing the safety and stability of dye-sensitized solar cells (DSSCs).
  • Traditional monocationic electrolytes face limitations in optimizing charge transport and device performance.

Purpose of the Study:

  • To synthesize and characterize novel thiazole/benzothiazole-based dicationic conductors.
  • To evaluate their performance as solid-state electrolytes in dye-sensitized solar cells.
  • To investigate the structure-property relationships influencing cell efficiency.

Main Methods:

  • Synthesis of dicationic conductors.
  • Material characterization using X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA).
  • Device performance evaluation through steady-state voltammogram, photocurrent intensity-photovoltage tests, and electrochemical impedance spectroscopy (EIS).

Main Results:

  • Dicationic crystals exhibited larger sizes compared to monocationic counterparts, allowing for property tuning.
  • The synthesized dicationic conductors functioned effectively as solid-state electrolytes in DSSCs.
  • The DSSC device achieved a significant photoelectric conversion efficiency of 7.90% under AM 1.5 sunlight (100 mW·cm⁻²).

Conclusions:

  • Thiazole/benzothiazole-based dicationic conductors represent a promising advancement for solid-state electrolytes in DSSCs.
  • The dicationic structure offers advantages for optimizing electrolyte properties and enhancing solar cell efficiency.
  • This research contributes to the development of more efficient and stable solar energy conversion technologies.