π-Extended rigid triptycene-trisaroylenimidazoles as electron acceptors

Area of Science:

• Organic Chemistry
• Materials Science
• Photovoltaics

Background:

• Triptycene scaffolds offer unique three-dimensional structures.
• Soluble organic acceptors are crucial for efficient organic photovoltaic devices.

Purpose of the Study:

• To synthesize and characterize novel isomeric acceptor molecules based on a triptycene core.
• To evaluate the photophysical properties of these acceptors in solution and film.
• To assess their performance in organic photovoltaic devices.

Main Methods:

• Synthesis of triptycene-based acceptor molecules with aroylenimidazole units.
• Full photophysical characterization (UV-Vis absorption, fluorescence spectroscopy, etc.).
• Fabrication and testing of organic photovoltaic devices using the synthesized acceptors.

Main Results:

• Two soluble isomeric acceptor molecules based on a triptycene core were successfully synthesized.
• The molecules exhibited favorable solubility due to their threefold axis, enabling thorough characterization.
• Preliminary results in organic photovoltaic devices with two different donor materials were obtained.

Conclusions:

• The synthesized triptycene-based acceptors are photophysically well-characterized and soluble.
• These molecules demonstrate potential for use in organic photovoltaic applications.