Organic dyes with intense light absorption especially suitable for application in thin-layer dye-sensitized solar...

Area of Science:

• Materials Science
• Organic Chemistry
• Photovoltaics

Background:

• Dye-sensitized solar cells (DSSCs) are a promising renewable energy technology.
• Development of efficient organic sensitizers is crucial for DSSC performance.
• Thiazolo[5,4-d]thiazole derivatives offer potential as novel sensitizer scaffolds.

Purpose of the Study:

• To design and synthesize novel thiazolo[5,4-d]thiazole-based organic dyes.
• To evaluate their light absorption properties and suitability as DSSC sensitizers.
• To assess the performance of DSSCs fabricated with these new dyes.

Main Methods:

• Synthesis of three new thiazolo[5,4-d]thiazole-based organic dyes.
• Characterization of their photophysical properties, including light absorption.
• Fabrication and testing of thin-layer DSSCs using the synthesized dyes.

Main Results:

• The synthesized dyes demonstrated very intense light absorption in the visible region (extinction coefficients up to 9.41 × 10(4) M(-1) cm(-1)).
• The dyes were successfully employed as sensitizers in both transparent and opaque thin-layer DSSCs.
• Achieved power conversion efficiencies of up to 7.71% in DSSCs with TiO2 layer thickness of 5.5–6.5 μm.

Conclusions:

• The novel thiazolo[5,4-d]thiazole-based organic dyes are effective DSSC sensitizers.
• Their strong light absorption and good performance make them suitable for solar cells produced under simple fabrication conditions.
• These findings contribute to the advancement of efficient and cost-effective organic solar cell technologies.