An all-in-one memory cell based on a homopolymer with a pyrene side chain and its volatile and nonvolatile resistive switch behaviors 1. Issue 9 (15th February 2018)

• Record Type: Journal Article
• Authors: Wang, Hongliang; Zhou, Feng; Wu, Linxin; Xiao, Xiong; Gu, Pei-Yang; Jiang, Jun; Xu, Qing-Feng; Lu, Jian-Mei
• Is Part Of: Polymer chemistry. Volume 9:Issue 9(2018)
• Page Start: 1139
• Page End: 1146
• Publication Date: 2018-02-15
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c7py01925d
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Memory devices based onPMPPE exhibit a rewritable ternary memory behaviour (0, 1, 2, three conductivity states). Abstract : Due to their processability and flexibility, nanosheets of functional polymers showed promising applications in high capacity memory and flexional organic electronics. In this paper, we are interested in preparing a homopolymer nanofilm based ternary memory device with two different memory performances (non-volatile and volatile). Two monomers, 2-methyl-acrylic acid 4-(1-cyano-2-naphthalen-1-yl-vinyl)-phenyl ester (MNPE ) and 2-methyl-acrylic acid 4-(1-cyano-2-pyren-1-yl-vinyl)-phenyl ester (MPPE ), with the same structure except for the terminal conjugated group, were synthesised. Their corresponding homopolymers:PMNPE andPMPPE were obtained from monomersMNPE andMPPE by the use of the atom transfer radical polymerisation (ATRP) method, respectively. The sandwich-structure memory devices usingPMNPE andPMPPE as active layers were prepared. Through the current–voltage ( I – V ) measurement of sandwich-structure memory devices based onPMNPE andPMPPE, memory devices based onPMNPE show binary WORM memory behaviour, while memory devices based onPMPPE exhibit a rewritable ternary memory behaviour (0, 1, 2, three conductivity states), in which the "1" and "2" states can be switched with bias switching. Their storage mechanism was speculated and discovered by experiments. The pyrene conjugated plane was much larger than that of naphthalene, so the storage mechanism for ternary behaviour involved an inversion of configuration and a charge transfer process, and the inversion of configuration was reversible and offered the rewritable behaviour. Our result provided a new 'all-in-one' memory cell to extend the performance of multilevel data storage devices.