Resistance Controllability in Alkynylgold(III) Complex-Based Resistive Memory for Flash-Type Storage Applications.

Area of Science:

• Materials Science
• Organic Electronics
• Nanotechnology

Background:

• State-of-the-art information technologies require materials for vast data storage.
• Organic memory devices (OMDs) are crucial, but metal-complex based OMDs are limited.
• Existing OMDs often use transition-metal complexes with nitrogen-donor ligands.

Purpose of the Study:

• To introduce novel alkynylgold(III) materials for superior performance in memory devices.
• To synthesize and characterize a new alkynyl-containing coumarin gold(III) complex.
• To explore the potential of gold(III) complexes in organic electronics.

Main Methods:

• Synthesis of an alkynyl-containing coumarin gold(III) complex: [(C19N5H11)Au-C≡C-C9H5O].
• Fabrication of a sandwiched memory device: Al/[(C19N5H11)Au-C≡C-C9H5O]/indium tin oxide.
• Electrical characterization by controlling compliance current (Icc) for resistance switching analysis.

Main Results:

• The synthesized gold(III) complex was successfully integrated into a memory device.
• Devices exhibited tunable switching characteristics based on compliance current control.
• Flash-type binary resistance switching was observed at Icc ≤10⁻³ A.
• Write Once Read Many (WORM)-type ternary resistance switching was achieved at Icc =10⁻² A.

Conclusions:

• Alkynylgold(III) complexes represent a promising new class of materials for organic memory devices.
• Precise control of compliance current allows for distinct memory switching behaviors.
• This research paves the way for advanced gold(III) complex-based electrical memories in organic electronics.