Monolithic Integration of Reliable Memristor Arrays and a Homogeneous 1T1R Unit Using All-Solution-Processed MoS₂.

Area of Science:

• Materials Science
• Electronics Engineering
• Nanotechnology

Background:

• Solution-processed 2D semiconductors face challenges in device variability and reliability due to film imperfections.
• Existing fabrication methods for 2D materials often lead to inconsistent device performance.

Purpose of the Study:

• To develop a reliable and scalable method for fabricating uniform 2D semiconductor films using molybdenum disulfide (MoS2).
• To enhance the performance and reliability of MoS2-based memristors and integrate them into memory arrays.
• To explore the potential of solution-processed 2D materials for next-generation electronic applications.

Main Methods:

• Utilized cation-assisted intercalation and interfacial self-assembly to create wafer-scale uniform MoS2 nanosheet films.
• Employed design-technology co-optimization (DTCO) and an embedded-electrode design for enhanced device reliability.
• Fabricated and tested 6x8 and 10x10 cross-point memristor arrays and one-transistor one-memristor (1T1R) circuits.

Main Results:

• Achieved highly uniform MoS2 nanosheet films with controlled thickness and lateral size.
• Demonstrated MoS2 memristors with narrow switching voltage distributions, stable endurance, and long retention times (>10^4 s).
• Reported a high fabrication yield (93.75%) for memristor arrays and successful integration into 1T1R configurations with precise control.

Conclusions:

• The developed DTCO approach provides a scalable and reliable route for fabricating high-performance 2D semiconductor devices.
• Solution-processed MoS2 memristors show significant promise for high-density memory and hardware neuromorphic computing.
• This work paves the way for all-solution-processable 2D semiconductor-based electronic systems.