Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application  

作　　者：Panke Zhou Hong Yu Mun Yin Chee Tao Zeng Tianli Jin Hongling Yu Shuo Wu Wen Siang Lew Xiong Chen 

机构地区：[1]State Key Laboratory of Photocatalysis on Energy and Environment,College of Chemistry,Fuzhou University,Fuzhou 350116,China [2]School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore 637371,Singapore [3]Department of Materials Science and Engineering,National University of Singapore,Singapore 117575,Singapore

出　　处：《Chinese Chemical Letters》2024年第5期227-231,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21972021 and 22111530111);the support of China Scholarship Council(No.202206650013).

摘　　要：Covalent organic polymer(COP)thin film-based memristors have generated intensive research interest,but the studies are still in their infancy.Herein,by controlling the content of hydroxyl groups in the aldehyde monomer,Py-COP thin films with different electronic push-pull effects were fabricated bearing distinct memory performances,where the films were prepared by the solid-liquid interface method on the ITO substrates and further fabricated as memory devices with ITO/Py-COPs/Ag architectures.The Py-COP-1-based memory device only exhibited binary memory behavior with an ON/OFF ratio of 1:10^(1.87).In contrast,the device based on Py-COP-2 demonstrated ternary memory behavior with an ON/OFF ratio of 1:10^(0.6):10^(3.1) and a ternary yield of 55%.The ternary memory mechanism of the ITO/Py-COP-2/Ag memory device is most likely due to the combination of the trapping of charge carriers and conductive filaments.Interestingly,the Py-COPs-based devices can successfully emulate the synaptic potentiation/depression behavior,clarifying the programmability of these devices in neuromorphic systems.These results suggest that the electronic properties of COPs can be precisely tuned at the molecular level,which provides a promising route for designing multi-level memory devices.

关 键 词：Covalent organic polymers Push-pull effects Multi-level memory MEMRISTOR 

分 类 号：TN60[电子电信—电路与系统]