Switching of Resistive Memory Behavior from Binary to Ternary Logic via Alteration of Substituent Positioning on the Subphthalocyanine Core

Journal of the American Chemical Society
Hing ChanVivian Wing-Wah Yam

Abstract

Two new axially or peripherally functionalized subphthalocyanines with the decoration of donor-acceptor substituents have been successfully synthesized, characterized and employed in the application of resistive memory device via solution-processable technique. Axially substituted subphthalocyanine shows ternary resistive memory behavior with well-separated current ratios of 1:106:108 between "OFF", "ON1" and "ON2" states, while only binary logic is observed for peripherally substituted subphthalocyanine. Computational studies show the presence of two well-separated charge transfer states in the axially substituted subphthalocyanine, while the charge transfer processes between the peripheral substituents and the subphthalocyanine core are found to be very close in energy. This work has demonstrated the impact of the substituent positioning on the subphthalocyanine-based memory device performance, providing a new research dimension for the future design and development of multistate organic resistive memory.

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Citations

Apr 2, 2019·Chemical Communications : Chem Comm·Biswajit K BarmanRatheesh K Vijayaraghavan
May 10, 2019·Chemical Society Reviews·Soren K Mellerup, Suning Wang
Mar 24, 2020·Nature Nanotechnology·Sreetosh GoswamiT Venkatesan
Apr 23, 2021·Nanoscale·Biswajit K BarmanRatheesh K Vijayaraghavan
Aug 5, 2017·ACS Applied Materials & Interfaces·Xue-Feng ChengJian-Mei Lu
Mar 10, 2020·ACS Applied Materials & Interfaces·Cheng ZhangJian-Mei Lu
Nov 19, 2019·Journal of the American Chemical Society·Amit GhoshMichael Schmittel

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