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Resistance-switchable conjugated polyrotaxane for flexible high-performance RRAMs.

Jiankui Zhou¹, Hanfang Feng¹, Qingqing Sun¹

¹School of Materials Science and Engineering The Key Laboratory of Material Processing and Mold of Ministry of Education, Henan Key Laboratory of Advanced Nylon Materials and Application Zhengzhou University, Zhengzhou 450001, P. R. China. sunqingqing@zzu.edu.cn.

Materials Horizons

|March 28, 2022

Summary

Researchers developed a novel conjugated polyrotaxane (CPR1) for resistive random-access memory (RRAM) devices. This CPR1 RRAM exhibits exceptional performance, including high ON/OFF ratios and fast response times, paving the way for advanced electronics.

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Area of Science:

Materials Science
Nanotechnology
Electronics

Background:

Resistive Random-Access Memory (RRAM) is a promising non-volatile memory technology.
Developing materials with enhanced resistive switching properties is crucial for next-generation electronics.

Purpose of the Study:

To synthesize a novel conjugated polyrotaxane (CPR1) for RRAM applications.
To investigate the resistive switching characteristics and underlying mechanism of CPR1-based RRAM devices.
To explore the potential of CPR1 for flexible and wearable electronic devices.

Main Methods:

Synthesis of closely packed conjugated polyrotaxane (CPR1) by threading polyaniline (PAN) into β-cyclodextrin (CD) macrocycles.
Fabrication and characterization of CPR1-based RRAM devices.
Investigation of resistive switching mechanism via electric-field-induced proton doping.
Fabrication of flexible CPR1 RRAM device arrays using full-printing technology.

Main Results:

CPR1 RRAM demonstrated outstanding non-volatile memory performance with a high ON/OFF ratio (10^8) and ultra-fast response (29 ns).
Excellent reliability, reproducibility, and long-term stability (>1 year) were observed.
The resistive switching mechanism was attributed to electric-field-induced proton doping facilitated by hydrogen bonding between PAN and CD.
Flexible CPR1 RRAM arrays fabricated by printing showed high endurance (1000 bending cycles) and a low operating voltage (1.8 V).

Conclusions:

Closely packed conjugated polyrotaxane (CPR1) is a highly effective material for advanced RRAM devices.
The unique structure of CPR1 enables excellent resistive switching properties and mechanical flexibility.
CPR1 holds significant potential for developing stable, high-performance memory solutions for flexible and wearable electronics.