Non-volatile Optoelectronic Memory with "Self-Refined" N-Type Conjugated Polymer Floating Gate for Multistate Storage

Area of Science:

• Materials Science
• Organic Electronics
• Nanotechnology

Background:

• Optoelectronic coupling programming integrates sensing, storage, and multilevel capabilities, attracting significant research interest.
• Existing optoelectronic memory devices often require complex fabrication processes.

Purpose of the Study:

• To propose a novel nonvolatile organic optoelectronic memory device with a simplified, one-step preparation method.
• To investigate a light-assisted storage mechanism and multibit characteristics.

Main Methods:

• A self-refinement strategy was employed to induce vertical phase segregation in a multicomponent system.
• An n-type conjugated polymer was dispersed in a p-type semiconductor@insulating polymer blend to form a floating gate.
• Fabricated transistors were tested for bistability, memory ratio, retention time, and multibit characteristics under varying light and electrical conditions.

Main Results:

• A transparent, optically active film was prepared with a unique vertical phase-segregated structure.
• The device demonstrated stable bistability with a memory ratio >10^4 and retention >10^4 s.
• Multibit optoelectronic memory characteristics were achieved across UV and visible light ranges, exhibiting 16 states.

Conclusions:

• The developed organic optoelectronic memory offers a facile one-step fabrication route.
• The device exhibits excellent performance metrics and multibit storage capabilities.
• Successful demonstration in color image recording highlights its practical application potential.