A Supramolecular Ferroelectric With Two Sublattices and Polarization Dependent Conductivity

Area of Science:

• Materials Science
• Organic Electronics
• Solid-State Physics

Background:

• Organic ferroelectrics offer tunable properties through chemical design.
• Functional molecular materials with supramolecular organization are key for advanced applications.
• Understanding the interplay between ferroelectricity and conductivity is crucial for device development.

Purpose of the Study:

• Investigate a class of organic molecular materials exhibiting ferroelectric behavior and long-range electronic conductivity.
• Analyze how ferroelectric polarization influences the material's electronic conductivity.
• Explore the potential of these materials for multifunctional applications.

Main Methods:

• Synthesis and characterization of organic molecular materials with fibrillar bundle organization.
• Measurement of ferroelectric properties using polarization-hysteresis and capacitance-voltage curves.
• Evaluation of electronic conductivity and its modulation by ferroelectric polarization.

Main Results:

• The material exhibits ferroelectric behavior due to two independent dipolar moieties, evidenced by distinct coercive fields.
• Long-range electronic conductivity arises from oxidation and inter-molecular electron transfer.
• Conductivity is modulated by ferroelectric polarization direction and magnitude, explained by injection barrier modulation and polaron hopping.

Conclusions:

• The investigated organic materials possess dual ferroelectric and conductive properties.
• Ferroelectric polarization effectively modulates electronic conductance.
• These materials are promising candidates for developing novel multifunctional electronic devices.