Flexible polymer memory devices derived from triphenylamine–pyrene containing donor–acceptor polyimides

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

doi:10.1039/c2jm33852a

Cited by 72 publications

(57 citation statements)

References 44 publications

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“…53,68,106 Ueda and colleagues fabricated a typical memory device on a flexible PET substrate. 68 The device showed very stable non-volatile behavior even after bending at a radius of curvature of 5 mm for up to 1000 bending cycles.…”

Section: Flexible Hpp Electrical Memory Devicesmentioning

confidence: 99%

“…If the ON state can be switched back to the OFF state by applying a suitable voltage, which is an erasing process, then the memory effect is called rewritable memory ( Figure 3). 68 However, WORM memory is capable of maintaining the ON state (holding data) permanently, even after the application of a reverse voltage, and can be read repeatedly ( Figure 4). 53 …”

Section: Hpps For Non-volatile Memory Devicesmentioning

confidence: 99%

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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: Flexible Hpp Electrical Memory Devicesmentioning

confidence: 99%

Section: Hpps For Non-volatile Memory Devicesmentioning

confidence: 99%

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

Yen

Liou

2015

Polym J

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“…In particular, high-performance flexible non-volatile memories based on various data storage principles such as resistive type [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] , flash 4,[25][26][27][28][29] and ferroelectric [30][31][32][33][34][35][36][37][38][39][40] hold great promise in a variety of emerging applications ranging from mobile computing to information management and communication. While the recent advances in this area are impressive, novel organic materials and electronic device structures that can be tightly rolled, crumpled, stretched, sharply folded and unfolded repeatedly without any performance degradation still need to be developed.…”

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confidence: 99%

Non-volatile organic memory with sub-millimetre bending radius

et al. 2014

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High-performance non-volatile memory that can operate under various mechanical deformations such as bending and folding is in great demand for the future smart wearable and foldable electronics. Here we demonstrate non-volatile solution-processed ferroelectric organic field-effect transistor memories operating in p-and n-type dual mode, with excellent mechanical flexibility. Our devices contain a ferroelectric poly(vinylidene fluoride-cotrifluoroethylene) thin insulator layer and use a quinoidal oligothiophene derivative (QQT(CN)4) as organic semiconductor. Our dual-mode field-effect devices are highly reliable with data retention and endurance of 46,000 s and 100 cycles, respectively, even after 1,000 bending cycles at both extreme bending radii as low as 500 mm and with sharp folding involving inelastic deformation of the device. Nano-indentation and nano scratch studies are performed to characterize the mechanical properties of organic layers and understand the crucial role played by QQT(CN)4 on the mechanical flexibility of our devices.

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“…9,10 On the basis of this mechanism, several types of organic or polymeric memory device, including flash (re-writable), writeonce-read-many-times (WORM), and dynamicrandom-access-memory (DRAM), have been demonstrated in recent years. [11][12][13][14] To achieve electrical bistability, polyimides (PI) containing electron-donor and acceptor groups have attracted much attention, because PI not only has a conjugated structure for charge transfer but also has excellent thermal and mechanical properties. [15][16][17][18][19][20][21][22] In our previous research, PI with WORM, DRAM, and flash memory behavior have been synthesized.…”

Section: Introductionmentioning

confidence: 99%

Electrical Bistability and Erasable Memory Effect of a Functional Polyimide Film: Synthesis and Investigation of Mechanism

Tian

Jia

et al. 2015

Journal of Elec Materi

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A functional polyimide (PI) film, (hexafluoroisopropylidene)diphthalic anhydride-2-(9H-carbazol-9-yl)ethyl 3,5-diaminobenzoate (6FDA-DADBC), in which DADBC serves as electron donor and 6FDA as electron acceptor, was synthesized in this work. The PI has electrical bistability and the sandwich device ITOk6FDA-DADBC-PIkAu made by using this functional PI as the active layer has nonvolatile memory-storage properties. It can be changed between the insulating state (Off state) and the conducting state (On state) by application of potentials of approximately 0.5 V and À2.5 V, respectively, with an On/Off current ratio of approximately 10 2 , which is suitable for use as flash memory. Mechanisms of the charge transfer occurring in the materials were investigated, and are thoroughly discussed on the basis of molecular simulation. The PI has good thermal stability up to 400°C.

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Flexible polymer memory devices derived from triphenylamine–pyrene containing donor–acceptor polyimides

Cited by 72 publications

References 44 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

Non-volatile organic memory with sub-millimetre bending radius

Electrical Bistability and Erasable Memory Effect of a Functional Polyimide Film: Synthesis and Investigation of Mechanism

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