Journal ArticleDOI
Organic Non-Volatile Memory Based on Pentacene Field-Effect Transistors Using a Polymeric Gate Electret**
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In this paper, a poly(a-methylstyrene) (PaMS) layer was added to the SiO2 gate insulator and the pentacene channel in the typical OFET structure, and the results indicated reasonably good OFET behavior, suggesting the additional PaMS layer does not degrade the performance of the devices.Abstract:
electrets. In this Communication, we report on OFET memory devices built on silicon wafers and based on films of pentacene and an SiO2 gate insulator that are separated by a thin layer of poly(a-methylstyrene) (PaMS), which acts as a polymeric gate dielectric. This OFET memory device displayed reversible shifts in the threshold voltage (VTh) when an appropriate gate voltage (Vg) was applied above a certain threshold via a relatively short switching time. Based on these reversible shifts in VTh, a non-volatile organic memory was demonstrated that takes advantage of the simple configuration of a typical OFET. This device showed a large memory window (about 90 V), a high on/off ratio (IOn/IOff) (10 5 ), a short switching time (less than 1 ls), and a long retention time (more than 100 h). These memory characteristics were obtained only when an appropriate polymeric gate electret layer (e.g., PaMS) was inserted between the SiO2 gate insulator and the pentacene channel in the typical OFET structure. Therefore, it is possible that this behavior originates from the modulation of the gate field by stored charges in the polymeric gate electret. Detailed reasons for these results and a possible operating mechanism for our OFET memory device are discussed. A cross-sectional view of the fabricated device structure is shown in Figure 1a. Further details concerning the fabrication of this device are discussed in the Experimental section. Figure 1b and c shows the output and transfer characteristics of the devices, respectively. The results indicate reasonably good OFET behavior, suggesting the additional PaMS layer does not degrade the performance of the devices. [14] From the conventional characterization equation, [15] the measured values of the typical field-effect mobility (lFET), VTh, and IOn/IOff were 0.51 cm 2 V –1 s –1 (maximum value, 0.89 cm 2 V –1 s –1 ), – 19 V, and 10 5 , respectively. These transistor properties couldread more
Citations
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Silicon ion implanted PMMA for soft electronics
Georgi B. Hadjichristov,V.K. Gueorguiev,Tzvetan E. Ivanov,Yordan G. Marinov,V. G. Ivanov,Eric Faulques +5 more
TL;DR: In this article, the electrical conductivity and field-effect transconductance of polymethylmethacrylate (PMMA) subjected to implantation with 50 keV silicon ions at doses in the range from 10 14 to 10 17 ions/cm 2 were examined.
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Artificial electrical dipole in polymer multilayers for nonvolatile thin film transistor memory
TL;DR: In this article, an organic nonvolatile thin-film transistor (TFT) memory on a plastic substrate is reported, where the cross-linked poly-4-vinyl phenol (PVP) is used as a polymer dielectric layer in the form of a triple layer structure to achieve the memory function.
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Solution processed non-volatile top-gate polymer field-effect transistors
Wei Lin Leong,Nripan Mathews,Bertha Tan,Subramanian Vaidyanathan,Florian Dötz,Subodh Mhaisalkar +5 more
TL;DR: In this paper, the authors describe the development of a top gate solution processable organic memory solution, which operates at voltages between 20 and 30 V with memory on-off ratios close to 103 at programming speeds of 1 ms.
Journal ArticleDOI
Polycyclic arene-based D–A polyimide electrets for high-performance n-type organic field effect transistor memory devices
TL;DR: In this article, the memory characteristics of n-type N,N-bis(2-phenylethyl)-perylene-3,4:9,10-tetracarboxylic diimide-based organic field effect transistors (OFET) using a series of donor-acceptor (D-A) polyimide electrets of poly[4,4′-diamino-4″-methyltriphenylamine-hexafluoroisopropylidenediphthal imide] (PI(AMT
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Optical memory characteristics of solution-processed organic transistors with self-organized organic floating gates for printable multi-level storage devices
TL;DR: In this article, a solution process was used to fabricate top-gate/bottom-contact (TG/BC) OFET devices with organic floating-gate structures and investigate their memory characteristics under light illumination.
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