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

Abstract

Covalent organic polymers (COPs) memristors with multilevel memory behavior in harsh environments and photoelectric regulation are crucial for high‐density storage and high‐efficiency neuromorphic computing. Here, a donor–acceptor (D–A)‐type COP film (Py‐COP‐3), which is initiated by keto–enol tautomerism, is proposed for high‐performance memristors. Satisfactorily, the indium tin oxide (ITO)/Py‐COP‐3/Ag device demonstrates multilevel memory performance, even in high temperatures, acid‐base corrosion, and various organic solvents. Moreover, the performance can be modulated by the photoelectric effect to maintain a great switching behavior. By contrast, Py‐COP‐0, with similar structure and chemical composition to Py‐COP‐3 but without keto–enol tautomerism, exhibits binary storage performance. Further studies unravel that both the formation of conductive filaments and charge transfer within D‐A Py‐COP‐3 film contribute to the resistive switching behavior of memory devices.

Implementation of Thermal-Triggered Binary–Ternary Switchable Memory Performance in Zn/polysulfide/organic Complex-Based Memorizers by Finely Modulating the S62– Relaxation

“…Their surface roughness revealed by root-mean-square (rms) is 13.30, 0.20, 0.05, and 0.50 nm, hinting at their good homogeneities again. The thickness of the thin film directly affects the electronic transport pathway in resistive switching memory . The film thickness has been optimized with FTO/ 1 /Ag as an example (78, 106, and 160 nm), in which the thickness of 106 nm presents the highest ON/OFF ratio (Figure S6a).…”

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 …”