A Highly Crystalline Single Layer 2D Polymer for Low Variability and Excellent Scalability Molecular Memristors. Issue 6 (18th December 2022)

• Record Type: Journal Article
• Authors: Liu, Lei; Geng, Bowen; Ji, Wenyan; Wu, Lingli; Lei, Shengbin; Hu, Wenping
• Is Part Of: Advanced materials. Volume 35:Issue 6(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-18
• Subjects: flexible devices -- low variability -- molecular memristor -- scalability -- single layer 2D polymer; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202208377
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Large‐scale growth of highly crystalline single layer 2D polymers (SL‐2DPs) and their subsequent integration into memristors is key to advancing the development of high‐density data storage devices. However, leakage problems resulting from the porous structure of 2DPs continue to make such advances extremely challenging. Herein, we overcome this issue by incorporating long alkoxy chains into key molecular building blocks to obtain a highly crystalline 2DP, as visualized by scanning tunneling microscopy, and prevent metal permeation in the subsequent device fabrication process. SL‐2DP memristors constructed via direct evaporation of the top electrodes exhibit low variability (σVset = 0.14) due to the single‐monomer‐thick feature together with the high regular structure and coordination ability which minimizes the stochastic spatial distribution of conductive filaments (CFs) in both vertical and lateral dimensions. The variability is further decreased to 0.04 by confining the formation and fracture of CFs to the interface through the utilization of bilayer junctions. Using peak force tunneling atomic force microscopy, the nanometer scalability (< 50 nm 2 ) and low power consumption of these molecular memristor devices are demonstrated. Abstract : Highly crystalline single layer 2D polymers (SL‐2DPs) are prepared and further used as an active layer in the memristor. The devices exhibit low variability, high reliability in terms of yield, stability and durability, nanometer scalability, as well as distinguished bending endurance, which verified the unambiguous role of SL‐2DP film in diverse applications from high density information storage to ultra‐thin flexible electronics.