Localized Surface Plasmon Resonance-Mediated Charge Trapping/Detrapping for Core-Shell Nanorod-Based Optical Memory...

Area of Science:

• Materials Science
• Nanotechnology
• Optoelectronics

Background:

• Moore's Law drives miniaturization, requiring versatile single devices for the Internet of Things (IoT).
• Existing devices often lack integrated light sensing and data storage capabilities.

Purpose of the Study:

• To propose and investigate organic optical memory devices with dual optoelectronic functionality.
• To explore the use of gold-silver (Au@Ag) core-shell nanorods (NRs) for enhanced memory performance.

Main Methods:

• Fabrication of Au@Ag core-shell nanorods with controlled morphology, size, and concentration.
• Systematic study of phototunable memory behavior by varying silver shell thickness.
• Utilizing localized surface plasmon resonance (LSPR) simulations to understand device mechanisms.

Main Results:

• Demonstrated a large memory window of up to 19.7 V in the Au@Ag NRs-based memory device.
• Achieved phototunable memory properties and multilevel data storage assisted by light.
• Experimental and simulation results confirmed LSPR as the origin of the phototunable memory effect.

Conclusions:

• Au@Ag core-shell NRs enable high-performance organic optical memory devices with dual functionality.
• The phototunable memory property offers a new strategy for advanced optoelectronic applications.
• These findings contribute to the development of next-generation IoT devices.