J-aggregation induced low bandgap anthracene-based conjugated molecule for solution-processed solar cells.

Area of Science:

• Organic electronics
• Materials science
• Conjugated molecules

Background:

• Anthracene-based X-shaped conjugated molecules are of interest for organic electronic applications.
• Developing new materials with high charge carrier mobility and efficient light absorption is crucial.

Purpose of the Study:

• To synthesize and characterize a new anthracene-based X-shaped conjugated molecule, HBTATHT.
• To evaluate the performance of HBTATHT in organic thin film transistors (OTFTs) and organic solar cells (OSCs).

Main Methods:

• Synthesis of the HBTATHT molecule.
• Fabrication and characterization of unannealed OTFT devices.
• Fabrication and characterization of solution-processed OSCs using HBTATHT with different fullerene derivatives (PC61BM and PC71BM).

Main Results:

• HBTATHT-based unannealed OTFTs exhibited a high carrier mobility of 0.15 cm(2) V(-1) s(-1) and an excellent on/off ratio of 7.9 × 10(6).
• Solution-processed OSCs incorporating HBTATHT achieved power conversion efficiencies of 4.84% (with PC61BM) and 4.70% (with PC71BM).

Conclusions:

• The synthesized HBTATHT molecule shows significant potential for high-performance organic electronic devices.
• HBTATHT is a promising material for both OTFTs and OSC applications, particularly in unannealed and solution-processed configurations.