A covalent organic polymer-based transistor with multifunctional memory and synaptic functions

Feng, Zihao; Elewa, Ahmed M.; Mekhemer, Islam M. A.; Niu, Wenbiao; Ma, Xin-Qi; Jia, Ziqi; Zhao, JiYu; Han, Su-Ting; Chou, Ho-Hsiu; Zhou, Ye

doi:10.1039/d3tc03026a

J. Mater. Chem. C

2024

DOI: 10.1039/d3tc03026a

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A covalent organic polymer-based transistor with multifunctional memory and synaptic functions

Zihao Feng,

Ahmed M. Elewa,

Islam M. A. Mekhemer

et al.

Abstract: An organic synaptic transistor was fabricated with a covalent organic polymer MT-TP to mimic the behavior of biological synapses.

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Cited by 2 publications

References 46 publications

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Building Uniformly Structured Polymer Memristors via a 2D Conjugation Strategy for Neuromorphic Computing

Li,

Fan,

et al. 2024

Macromol. Rapid Commun.

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Polymer memristors represent a highly promising avenue for the advancement of next‐generation computing systems. However, the intrinsic structural heterogeneity characteristic of most polymers often results in organic polymer memristors displaying erratic resistive switching phenomena, which in turn leads to diminished production yields and compromised reliability. In this study, a two‐dimensionally (2D) conjugated polymer, named PBDTT‐BPQTPA, was synthesized by integrating the coplanar bis(thiophene)‐4,8‐dihydrobenzo[1,2‐b:4,5‐b]dithiophene (BDTT) as an electron‐donating unit with a quinoxaline derivative serving as an electron‐accepting unit. The incorporation of triphenylamine groups at the quinoxaline termini significantly enhanced the polymer's conjugation and planarity, thereby facilitating more efficient charge transport. The fabricated polymer memristor with the structure of Al/PBDTT‐BPQTPA/ITO exhibited typical non‐volatile resistive switching behavior under high voltage conditions, along with history‐dependent memristive properties at lower voltages. The unique memristive behavior of the device enabled the simulation of synaptic enhancement/inhibition, learning algorithms, and memory operations. Additionally, the memristor demonstrated its capability for executing logical operations and handling decimal calculations. This study offers a promising and innovative approach for the development of artificial neuromorphic computing systems.This article is protected by copyright. All rights reserved

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Building Uniformly Structured Polymer Memristors via a 2D Conjugation Strategy for Neuromorphic Computing

Li,

Fan,

et al. 2024

Macromol. Rapid Commun.

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Surmounting Erase-Operation Limit in Organic Charge-Trap Memories by Fine Tuning Electron Injection at Semiconductor/Heterobimetallic Electrode Contacts

Kim,

Kwon

et al. 2024

ACS Appl. Mater. Interfaces

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Heterobimetallic systems (HBS), known for their ability to facilitate the versatile design of surface workfunctions, offer significant potential as an electron-injection electrode layer for organic semiconductors. In this paper, we propose a universal and effective strategy to overcome the limitations of the erase operation in charge-trap memory with a small-bandgap organic semiconductor or diketopyrrolopyrrole-quaterthiophene-conjugated polymer (PDPP4T) by utilizing HBS-based source/drain (SD) electrodes. Conventional gold SD electrodes restrict electron injection into the PDPP4T layer during the electrical erase operation and impose a lower limit on the erasing voltage required for full threshold-voltage recovery. The HBS SD electrodes with an upshifted Fermi level toward the lowest unoccupied molecular orbital level of PDPP4T enhanced electron injection during an electrical erase operation, reducing the erasing voltage and achieving a balance between programming and erasing voltages. In addition, an asymmetric SD structure was employed for preventing a decrease in the on-state drain current while maintaining an optimal erase operation.

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A covalent organic polymer-based transistor with multifunctional memory and synaptic functions

Abstract: An organic synaptic transistor was fabricated with a covalent organic polymer MT-TP to mimic the behavior of biological synapses.

Cited by 2 publications

References 46 publications

Building Uniformly Structured Polymer Memristors via a 2D Conjugation Strategy for Neuromorphic Computing

Building Uniformly Structured Polymer Memristors via a 2D Conjugation Strategy for Neuromorphic Computing

Surmounting Erase-Operation Limit in Organic Charge-Trap Memories by Fine Tuning Electron Injection at Semiconductor/Heterobimetallic Electrode Contacts

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