Intramolecular Hydrogen Bonding Interactions Induced Enhancement in Resistive Switching Memory Performance for Covalent Organic Framework‐Based Memristors

Abstract

Covalent organic frameworks (COFs) are promising active mediums for high‐performance data storage devices stemming from their high crystallinity, ordered porous channels, predetermined topology, and rigid architectures, while relative studies are still limited. Here, two COFs (i.e., COF‐EtD and COF‐EtA)‐based resistive‐switching memory devices are proposed to demonstrate the impact of intramolecular hydrogen bonding interactions, both of which exhibit nonvolatile write‐once‐read‐many (WORM) memory characteristics. Comparatively, COF‐EtD with the hydroxyl motif decoration illustrated a lower SET voltage (i.e., turn‐on voltage) and a higher ON/OFF current ratio as well as exceptional high‐temperature endurance and solvent resistance. Mechanism explorations suggest that the resistance‐switching behavior of COF‐EtD may be controlled by the synergistic effect of space‐charge‐limited current and conductive filaments. This finding is the first example of simply varying the functional group of COFs to regulate the WORM resistive switching behavior, providing some inspiration for the advancement of electronic memories and positively contributing to the realization of high endurance and high‐density electric storage materials.

Porous covalent organic frameworks in photocatalytic ROS-mediated processes

“…Some excellent reviews and seminal works have recently focused on the chemistry of COFs as well as the potential applications of such systems. These involve the utilization of covalent organic frameworks as functional components in diverse catalytic applications, 16,17 in energy storage, 18–21 in organic electronic devices, 22–24 in gas storage, 25 as porous adsorbents, 26,27 as chemical 28 and fluorescent sensors, 29 in thermocatalytic CO 2 conversion, 30 in photocatalytic evolution of oxygen, 31,32 in photocatalytic evolution of hydrogen, 33–35 in photocatalytic reduction of CO 2 , 36,37 in electrochemical energy conversion, 38–40 in nitrogen fixation, 41 in photocatalytic organic synthesis 42–45 as well in the photodegradation of pollutants. 46,47…”

COF-Based Photocatalysts for Enhanced Synthesis of Hydrogen Peroxide

“…To date, reported linkages include boroxine [ 50 ], boronate-ester [ 51 , 52 , 53 ], imine [ 54 , 55 , 56 , 57 ], hydrazone [ 58 , 59 ], squaraine [ 60 , 61 , 62 ], azine [ 63 , 64 , 65 ], imide [ 66 , 67 ], C=C [ 68 , 69 , 70 , 71 ], 1,4-dioxin linkage [ 72 , 73 ], among others. The COFs synthesized by these methods have shown great potential in applications such as sensing [ 74 , 75 , 76 ], catalysis [ 5 , 77 , 78 , 79 ], energy storage and conversion, [ 6 , 80 , 81 , 82 , 83 ] organic electronic devices [ 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 ], etc. [ 6 , 80 , 81 , 82 , 83 , 93 , 94 , 95 …”

Photoelectric Multilevel Memory Device based on Covalent Organic Polymer Film with Keto–Enol Tautomerism for Harsh Environments Applications

“…Covalent organic polymers (COPs) thin films are promising memory materials owing to their excellent solution processability, light weight, outstanding uniformity, good stability, and mechanical flexibility. [12][13][14][15][16] COPs feature a well-defined structure through rational molecular design and can attain a clearer understanding of the switching mechanism through theoretical simulations, which have led to a widespread research boom in the field of resistive switch memory. In particular, the adjustment in the molecular skeleton or substituents can significantly alter the storage performance.…”