High Thermal Conductive Crystalline Organohalide for Endurable Resistive Switching Non-Volatile Memory

Area of Science:

• Materials Science
• Organic Electronics
• Device Physics

Background:

• Organic-based memristive devices are promising for eco-friendly wearable electronics due to material flexibility and biocompatibility.
• However, poor operational reliability and stability hinder their widespread adoption.
• Existing organic materials face challenges in achieving high performance and endurance.

Purpose of the Study:

• To demonstrate a highly reliable and stable memristive device using a crystalline organohalide material.
• To overcome the limitations of current organic materials in memristor applications.
• To introduce Dabconium ammonium triiodide (DABCO-NH₄-I₃) as a new class of materials for high-performance organic electronics.

Main Methods:

• Fabrication of a conductive bridging random access memory (CBRAM) device based on crystalline DABCO-NH₄-I₃.
• Characterization of the device's electrical properties, including operating voltage, on/off ratio, and multi-level storage capability.
• Evaluation of device reliability and endurance through program-erase cycling at different temperatures, considering thermal conductivity.

Main Results:

• The DABCO-NH₄-I₃ memristive device exhibited millivolt-scale operating voltages and a high on/off ratio of ≈10⁹.
• The material's low dielectric constant, hexagonal crystal structure, and high bandgap contributed to its excellent performance.
• The device demonstrated remarkable endurance, with over 10³ program-erase cycles at both room temperature and 85 °C, attributed to its higher thermal conductivity suppressing Joule heating.

Conclusions:

• Crystalline DABCO-NH₄-I₃ offers exceptional reliability and endurance for memristive devices.
• This material overcomes critical challenges faced by existing organic materials in terms of stability and performance.
• The study introduces a promising new class of materials for advanced, high-performance next-generation organic electronic devices.