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7 Jun 2010

Volume 96, Issue 23, Articles (23xxxx)

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Appl. Phys. Lett. 96, 231104 (2010); http://dx.doi.org/10.1063/1.3443734 (3 pages)

Hiroto Sekiguchi, Katsumi Kishino, and Akihiko Kikuchi
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Memory mechanisms of vertical organic memory transistors

Li-Zhen Yu, Hung-Chun Chen, and Ching-Ting Lee

Appl. Phys. Lett. 96, 233301 (2010); http://dx.doi.org/10.1063/1.3449120 (3 pages) | Cited 3 times

Online Publication Date: 7 June 2010

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Three-terminal vertical organic memory transistors were fabricated to investigate the memory mechanisms and the relation between memory behavior and applied electrical field. The 9,10-di(2-naphthyl)anthracene was used as the active channel layer for the organic memory transistors. In both the ON and OFF state of the organic memory transistors, the drain-source currents (IDS) were modulated by applying various gate-source voltages (VGS). The switching drain-source voltage (VDS) decreased with an increase in applied VGS voltages. The ON/OFF IDS current ratio of the organic memory transistors could be modulated up to the maximum value of 2.02×105 by applying VGS voltage bias.
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81.05.Fb Organic semiconductors
85.30.-z Semiconductor devices
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Control of the charge transport properties in a solution-processible ambipolar quinoidal oligothiophene derivative by direct laser writing

J. C. Ribierre, T. Fujihara, T. Muto, and T. Aoyama

Appl. Phys. Lett. 96, 233302 (2010); http://dx.doi.org/10.1063/1.3449121 (3 pages) | Cited 3 times

Online Publication Date: 9 June 2010

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We investigate the effects of laser irradiation on the performance of organic field-effect transistors based on the solution-processible quinoidal oligothiophene [QQT(CN)4]. Whereas electron field-effect mobilities are not modified, hole transport can be selectively controlled and even suppressed depending on the laser irradiation conditions. Vertical p-n bipolar structures in QQT(CN)4 realized by direct laser writing are also studied. The results provide essential information for the effective laser patterning of complementary organic logic circuits and suggests the possibility to fabricate by direct laser writing complex three-dimensional bipolar p-n structures in a single QQT(CN)4 thin film.
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85.30.Tv Field effect devices
85.30.De Semiconductor-device characterization, design, and modeling
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