A Robust Nonvolatile Resistive Memory Device Based on a Freestanding Ultrathin 2D Imine Polymer Film

Liu, Jie; Yang, Fangxu; Cao, Lili; Li, Baili; Kuo, Yu‐An; Lei, Shengbin; Hu, Wenping

doi:10.1002/adma.201902264

Cited by 125 publications

(152 citation statements)

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“…An anisotropic transport was evidenced in the layer‐stacked 2D BECOFs accompanied with an intrinsic electrical conductivity up to ≈10 −7 S cm −1 and a carrier mobility up to ≈1.0 cm 2 V −1 s −1 (ac limit by photoconductivity measurements) . However, unlike imine‐based 2D conjugated COFs that have already shown promising applications in electronic devices, such as field‐effect transistors and memristors, it remains a great challenge to integrate 2D BECOFs into logic and memory devices due to the difficulty in thin‐film processability and device integration associated with the necessity of controlling film thickness, layer orientation, stability and crystallinity.…”

Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Boronate Ester Covalent Organic Framework Thin Films with Large Single Crystalline Domains for a Neuromorphic Memory Device

et al. 2020

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Despite the recent progress in the synthesis of crystalline boronate ester covalent organic frameworks (BECOFs) in powder and thin‐film through solvothermal method and on‐solid‐surface synthesis, respectively, their applications in electronics, remain less explored due to the challenges in thin‐film processability and device integration associated with the control of film thickness, layer orientation, stability and crystallinity. Moreover, although the crystalline domain sizes of the powder samples can reach micrometer scale (up to ≈1.5 μm), the reported thin‐film samples have so far rather small crystalline domains up to 100 nm. Here we demonstrate a general and efficient synthesis of crystalline two‐dimensional (2D) BECOF films composed of porphyrin macrocycles and phenyl or naphthyl linkers (named as 2D BECOF‐PP or 2D BECOF‐PN) by employing a surfactant‐monolayer‐assisted interfacial synthesis (SMAIS) on the water surface. The achieved 2D BECOF‐PP is featured as free‐standing thin film with large single‐crystalline domains up to ≈60 μm2 and tunable thickness from 6 to 16 nm. A hybrid memory device composed of 2D BECOF‐PP film on silicon nanowire‐based field‐effect transistor is demonstrated as a bio‐inspired system to mimic neuronal synapses, displaying a learning–erasing–forgetting memory process.

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Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Boronate Ester Covalent Organic Framework Thin Films with Large Single Crystalline Domains for a Neuromorphic Memory Device

et al. 2020

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“…Polymer‐based materials are another class of promising contenders for the development of novel resistive memory devices 17,43,44,49,74,108,111‐129 . Polymer functional materials possess similar advantages to organic small molecules, such as low cost, good flexibility, and ease of processing, which can serve as alternatives or supplements to their inorganic counterparts 43,111‐120 . As a consequence, numerous research attention have been paid to exploit various kinds of polymer materials that own appealing memory performances.…”

Section: Polymer‐based Materials For Resistive Memorymentioning

confidence: 99%

“…Among the progresses of polymer‐based resistive memories, single‐component polymers have aroused extensive concern due to their advantage of realizing binary and multilevel resistive memory switching within one designed macromolecule, which can avoid the probability of phase separation in composite systems 17,63,114,115 . In 2012, Liu et al reported the first single‐component polymer‐based ternary memory device of P55 (Figure 10A,B) 63 by combining the D‐A induced CT and conformational change mechanisms, which stimulated the research interests of obtaining multilevel storage in a single polymer system.…”

Section: Polymer‐based Materials For Resistive Memorymentioning

confidence: 99%

“…Accordingly, the polymer presented triple oxidation behavior, which made the vertical ITO/PFTPA‐Fc/Pt device capable of realizing quaternary resistive switching (Figure 10F). More intriguingly, Liu et al synthesized wafer‐scale ultrathin 2D imine polymer (2DP) films at the air‐water interface with controllable thickness from simple Schiff base polycondensation of benzene‐1,3,5‐tricarbaldehyde and p ‐phenylenediamine 115 . They discovered that this 2D polymer was porous, insulating, and covalently linked, which was ideal for ECM‐type memory applications.…”

Section: Polymer‐based Materials For Resistive Memorymentioning

confidence: 99%

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Recent advances in organic‐based materials for resistive memory applications

Qian

Zhu

et al. 2020

InfoMat

139

142

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With the rapid development of data‐driven human interaction, advanced data‐storage technologies with lower power consumption, larger storage capacity, faster switching speed, and higher integration density have become the goals of future memory electronics. Nevertheless, the physical limitations of conventional Si‐based binary storage systems lag far behind the ultrahigh‐density requirements of post‐Moore information storage. In this regard, the pursuit of alternatives and/or supplements to the existing storage technology has come to the forefront. Recently, organic‐based resistive memory materials have emerged as promising candidates for next‐generation information storage applications, which provide new possibilities of realizing high‐performance organic electronics. Herein, the memory device structure, switching types, mechanisms, and recent advances in organic resistive memory materials are reviewed. In particular, their potential of fulfilling multilevel storage is summarized. Besides, the present challenges and future prospects confronted by organic resistive memory materials and devices are discussed.

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“…Opening up new possibilities for the synthesis and structureproperty relationships of 2DCPs, this attempt was the first time that the use of this interface obtained a monolayer sheet (0.7 nm thickness) with lateral dimensions of tens of micrometers. Recently, Liu et al [47] successfully synthesized a wafer-scale ultrathin 2D imine polymer film with controllable thickness from a simple benzene-1,3,5-tricarbaldehyde (BTA) and p-phenylenediamine (PDA) building block by using a Schiff-base polycondensation reaction at the air-water interface. Creating the potential for new applications, such 2D polymer films exhibited excellent switching performance with high reliability and reproducibility in memory devices because their intrinsically porous structures were conducive to the formation of conductive filaments during device operation.…”

mentioning

confidence: 99%

Two-dimensional conjugated polymers synthesized via on-surface chemistry

Wang

Dong

et al. 2019

Sci. China Mater.

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Two-dimensional materials (2DMs) are an important subject in material science that have many interesting physical properties and significant potential applications in various technological areas [1,2]. Since the successful exfoliation of monoatomic graphene by Novoselov et al. [3] in 2004, a series of inorganic 2DMs, including transition-metal dichalcogenides (TMDs) [4], hexagonal boron nitride (h-BN) [5], metal nanomaterials [6], black phosphorus (BP) [7], and graphdiyne [8], have been obtained and investigated by fundamental studies in the fields of optoelectronics, catalysis, and energy storage [9 -14]. Organic 2DMs, such as organic small molecules, polymers, and organic-inorganic hybrid materials, are emerging material systems currently attracting increasing attention owing to their unique advantages of a wide diversity of organic substrates, easily tunable properties/ functionalities, and diversified syntheses at low cost and high efficiency [15][16][17][18][19][20][21][22][23]. Among the 2DMs, 2D conjugated polymers (2DCPs) with long-range periodic covalently bonded structures and fully-extended conjugations have received special attention from scientists working in different fields. The tunable bandgap and diversified topological structures by appropriate molecular design [24-28] endow 2DCPs, as a type of promising graphene analogue, with unique/tunable optoelectronic and spintronic properties, as well as promising applications in plastic optoelectronics and related functional devices/ circuits [29][30][31][32][33][34][35].For the above mentioned fundamental studies and device applications, the most crucial issue of 2DCPs is their quality, which includes molecular orders, 2D-conjugated structures that determine the energy bandgaps/alignments and functionality of materials, and material sizes.Thus far, the preparation of 2DCPs with the desired compositions, thicknesses, sizes, defects, crystal polymorphs, and surface properties is the core topic. Various synthetic processes based on both "top-down" and "bottom-up" strategies have been developed [2,17]. On-surface chemistry synthesis, a very important "bottom-up" strategy, was developed to overcome the limitations of uncontrollable polymer thickness, low yield, and low structural integrity [17,36,37]. On-surface chemistry, sometimes referred to as 2D chemistry, is the coupling of active molecules on a flat interface to directly provide ordered and expanded nanostructures to polymers (Fig. 1a). The interface provides a restricted system for the growth of precursors, which are capable of forming planar structures that cannot be accessed in a 3D reaction environment. Compared with classical solution-phase processes, another advantage of the surface method is the contribution of the related reaction conditions and potential surface interactions to the stabilization of highly active substances and intermediates. Moreover, on-surface chemistry synthesis is advantageous for directing the orientations of molecules to form ordered structures, and hence, it has been e...

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A Robust Nonvolatile Resistive Memory Device Based on a Freestanding Ultrathin 2D Imine Polymer Film

Cited by 125 publications

References 49 publications

Two‐Dimensional Boronate Ester Covalent Organic Framework Thin Films with Large Single Crystalline Domains for a Neuromorphic Memory Device

Two‐Dimensional Boronate Ester Covalent Organic Framework Thin Films with Large Single Crystalline Domains for a Neuromorphic Memory Device

Recent advances in organic‐based materials for resistive memory applications

Two-dimensional conjugated polymers synthesized via on-surface chemistry

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