Tuning the Electrical Memory Characteristics from Volatile to Nonvolatile by Perylene Imide Composition in Random Copolyimides

Kurosawa, Takao; Lai, Yi-Cang; Higashihara, Tomoya; Ueda, Mitsuru; Liu, Cheng‐Liang; Chen, Wen‐Chang

doi:10.1021/ma300732m

Cited by 70 publications

(59 citation statements)

References 35 publications

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“…Introducing a large conjugated or highly electronaffinitive unit is a simple and effective approach for developing PIs with non-volatile memory behavior. 54 For example, the introduction of a small amount (5 mol%) of perylene bisimide dramatically changes the memory properties of P8 from volatile DRAM to the non-volatile WORM type, possibly owing to stabilization of the separated charge by the large conjugation and trapping by the deep LUMO energy level arising from the highly electron-affinitive perylene bisimide.…”

Section: Mechanismmentioning

confidence: 99%

Solution-processable triarylamine-based high-performance polymers for resistive switching memory devices

Yen

Liou

2015

Polym J

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This review summarizes the most widely used mechanisms in high-performance polymeric resistive memory devices, such as charge transfer, space charge trapping and filament conduction. In addition, recent studies of functional high-performance polymers for memory device applications are reviewed, compared and differentiated based on the mechanisms and structural design methods used. By carefully designing the polymeric structure based on these systematically investigated switching mechanisms, almost all types of current memory characteristics can be reproduced, and these memory properties show extremely high endurance during long-term operation, which makes polyimides very suitable materials for memory applications. INTRODUCTION High-performance polymersToday, life without polymers is unimaginable. Polymers have become the major synthetic materials of the 21st century. High-performance polymers (HPPs) are particularly desirable. The synthesis and development of HPPs over the past 30 years have drawn the attention of many polymer scientists and investigators. These polymers generally possess excellent physical deformation resistance and chemical deterioration resistance at high temperatures over long periods of time. The quest for HPPs began in the late 1950s to meet the demands of the military, aerospace, machine-building and electronics industries, among many other industrial applications.Hill and Walker 1 first noted that the incorporation of aromatic segments into a polymer generally results in a notable increase in its thermal stability. For this reason, much of the research work has been directed toward aromatic compositions. Hence, HPPs usually tend to contain large numbers of aromatic units in their structures. Several of these aromatic HPPs have been used for commercial applications, such as aromatic polyamides, polyimides, polyesters, polysulfones, polytriphenylamine and heterocyclic polymers (Scheme 1). Aromatic polyamides (aramids) and polyimides, such as DuPont's Kevlar fiber and Kapton film, respectively, have been well known for a long time and constantly attract more interest than other HPPs for their useful properties, such as excellent thermal and oxidative stabilities, high mechanical strengths, low flammabilities and good chemical and radiation resistances. [2][3][4][5][6][7][8][9][10][11][12][13] However, the rigidity of the backbone and strong hydrogen bonding of these HPPs result in high melting or glass-transition

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Section: Mechanismmentioning

confidence: 99%

Solution-processable triarylamine-based high-performance polymers for resistive switching memory devices

Yen

Liou

2015

Polym J

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“…A recent pioneering research [36] by inserting certain perylenebisimide unit (acceptor) into a 6FDA/TPA-based polyimide chain has revealed the memory tuning from volatile to nonvolatile, verifying the feasibility of this strategy. However, literature survey indicates that works on this point were rare and far fewer attempts have been undertaken to explore such composition-dependent memory materials and devices.…”

Section: Introductionmentioning

confidence: 94%

Polymer memory devices with widely tunable memory characteristics based on functional copolynaphthalimides bearing varied fluorene and triphenylamine moieties

Tian

Shi

et al. 2015

European Polymer Journal

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“…43 Our group recently adopted random copolymers (coPI) containing perylene (PI-PBIX) or pyrene (PI(AMTPA-APAP)) to control the volatility of the resulting memory characteristics (Scheme 6). 42 As for PI(AMTPA-APAP), the memory properties changed from the volatile DRAM to the non-volatile FLASH type and to the nonerasable WORM type with the corresponding pyrene contents of 0, 5, and 100 mol%, respectively. For the PI-PBIX, the memory characteristics of the coPIs containing none or a small amount of the perylene unit (x ¼ 0, 1, 2.5) showed volatile memory properties, while coPIs containing a larger amount of the perylene unit (x ¼ 5, 10) showed non-volatile WORM type memory characteristics.…”

Section: Non-volatile Flash and Worm Type Memory Propertiesmentioning

confidence: 99%

Polyimide memory: a pithy guideline for future applications

2013

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Polymeric materials for use in memory devices have attracted significant scientific interest due to their several advantages, such as low cost, solution processability, high mechanical strength, and possible development of three-dimensional stacking devices. Taking into account the heat resistance for the device fabrication process, polyimides (PIs) are one of the most attractive polymers for memory applications due to their high thermal stability and mechanical strength. In recent years, a large number of studies have revealed that almost all kinds of memory properties from volatile to non-volatile memory can be produced by optimizing the chemical structure of the PIs. Several mechanisms have been discussed in order to explain the switching properties. Among them, two major theories, field induced charge transfer (CT) and filament formation, are thought to explain the phenomena in the PI system. In this article, recent studies of functional polyimides (PIs) for memory applications are reviewed, mostly focusing on the mechanism underlying the switching phenomena. In addition, some progress in the fabrication process for developing high density storage will also be reviewed.

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Tuning the Electrical Memory Characteristics from Volatile to Nonvolatile by Perylene Imide Composition in Random Copolyimides

Cited by 70 publications

References 35 publications

Solution-processable triarylamine-based high-performance polymers for resistive switching memory devices

Solution-processable triarylamine-based high-performance polymers for resistive switching memory devices

Polymer memory devices with widely tunable memory characteristics based on functional copolynaphthalimides bearing varied fluorene and triphenylamine moieties

Polyimide memory: a pithy guideline for future applications

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