Synthesis and memory characteristics of polyimides containing noncoplanar aryl pendant groups

Li, Yueqin; Fang, Rendong; Wang, Yulong; Shen, Yingzhong; Zheng, Anmin

doi:10.1016/j.polymer.2011.11.044

Cited by 63 publications

(30 citation statements)

References 53 publications

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“…Organic electrical memory devices with a simple structure based on a single layer pentacene film embedded between Al and ITO electrodes for different deposition rates of pentacene were studied and the performance of this reliable device with a high ON/OFF current ratio was reported [12]. There are many organic materials that are being used as memory device elements that provide fast, non-volatile memory device with high density data storage, high writing/reading stability and long retention time [17][18][19][20][21][22]. Several conduction mechanisms were also reported to explain the conductance switching mechanism in these devices.…”

Section: Introductionmentioning

confidence: 99%

Effect of vacuum annealing on evaporated pentacene thin films for memory device applications

Gayathri

Joseph

2016

Materials Science and Engineering: B

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Section: Introductionmentioning

confidence: 99%

Effect of vacuum annealing on evaporated pentacene thin films for memory device applications

Gayathri

Joseph

2016

Materials Science and Engineering: B

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“…The demand on organic non-volatile memory devices increases rapidly due to their simplicity in device structure, good scalability, low cost potential, low power operation and large capacity for data storage. Electrical bistable switching phenomena have been observed and reported for a variety of organic materials and device structures [1][2][3][4][5][6][7][8][9][10]. Several conductance mechanisms are also reported to explain this switching phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Bistable electrical switching and performance of a pentacene-based write once/read many memory device

Gayathri¹,

Joseph²

2016

Nanosystems: Phys. Chem. Math.

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In this paper, the performance of a pentacene-based write once/read many memory device is reported. The IV characteristics of a pentacene device deposited at 5Å/s on an ITO-coated glass substrate was studied. This device showed a stable switching from ON to OFF state with an ON-OFF current ratio of nearly 10 3 and a retention time of 5 × 10 4 s with a switching threshold voltage of 3.9 V. The irreversible switching of this device makes it suitable for write once/read many memory devices. The structural studies of pentacene thin films on glass substrate were also done and the dependence of device performance on grain size is reported. Improved performance of this device due to the addition of C 60 layer is also discussed.

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“…Much effort has been devoted to overcome these shortcomings of PIs as mentioned above, such as introduction of flexible linkages, [5,6] bulky substituents, [7][8][9] noncoplanar pendant structures, [10][11][12] unsymmetrical structures [13][14][15] and alicyclic structures [16][17][18] in the polymer backbones. Among them, incorporation of noncoplanar pendant structures into polymer chains is considered as the most efficient method to improve the solubility and processability of PIs without compromise of their thermostability and mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

“…It should be stressed that introduction of flexible linkages and alicyclic units into the polymer structures can simultaneously improve the solubility and optical transparency of PIs, however, it may sacrifice some of their advantageous properties, such as thermostability and mechanical properties. For instance, Zheng et al [10] reported a series of PIs with noncoplanar aryl pendant groups and found that the PIs exhibited excellent solubility in organic solvents, high thermal and dimensional stability. Matsumoto et al [18] synthesized PIs with excellent transparency, good solu-bility and thermal properties by using bicycle[2.2.1]-heptane-2,3,5,6-tetracarboxylic 2,3-5,6-dianhydrides as dianhydride monmer.…”

Section: Introductionmentioning

confidence: 99%

Novel Non‐Coplanar and Tertbutyl‐Substituted Polyimides: Solubility, Optical, Thermal and Dielectric Properties

et al. 2015

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A novel aromatic diamine monomer bearing tertbutyl and 4‐tertbutylphenyl groups, 3,3′‐ditertbutyl‐4,4′‐diaminodiphenyl‐4′′‐tertbutylphenylmethane (TADBP), was prepared and characterized. A series of non‐coplanar polyimides (PIs) were synthesized via a conventional one‐step polycondensation from TADBP and various aromatic dianhydrides including pyromellitic dianhydride (PMDA), 3,3′,4,4′‐biphenyltetracarboxylic dianhydride (BPDA), 4,4′‐oxydiphthalic anhydride (OPDA), 3,3′,4,4′‐benzophenone tetracarboxylic dianhydride (BTDA) and 4,4′‐(hexafluoroisopropylidene)dipthalic anhydride (6FDA). All PIs exhibit excellent solubility in common organic solvents such as N,N‐dimethylformamide (DMF), N,N‐dimethylacetamide (DMAc), N‐methyl‐2‐pyrrolidone (NMP), dimethyl sulfoxide (DMSO), chloroform (CHCl3), tetrahydrofuran (THF), and so on. Furthermore, the obtained transparent, strong and flexible polyimide films present good thermal stability and outstanding optical properties. Their glass transition temperatures (Tgs) are in the range of 298 to 347°C, and 10% weight loss temperatures are in excess of 490°C with more than 53% char yield at 800°C in nitrogen. All the polyimides can be cast into transparent and flexible films with tensile strength of 80.5–101 MPa, elongation at break of 8.4%–10.5%, and Young's modulus of 2.3–2.8 GPa. Meanwhile, the PIs show the cutoff wavelengths of 302–356 nm, as well as low moisture absorption (0.30% –0.55%) and low dielectric constant (2.78–3.12 at 1 MHz).

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Synthesis and memory characteristics of polyimides containing noncoplanar aryl pendant groups

Cited by 63 publications

References 53 publications

Effect of vacuum annealing on evaporated pentacene thin films for memory device applications

Effect of vacuum annealing on evaporated pentacene thin films for memory device applications

Bistable electrical switching and performance of a pentacene-based write once/read many memory device

Novel Non‐Coplanar and Tertbutyl‐Substituted Polyimides: Solubility, Optical, Thermal and Dielectric Properties

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