Topic
Pentacene
About: Pentacene is a research topic. Over the lifetime, 5051 publications have been published within this topic receiving 161481 citations. The topic is also known as: 2,3:6,7-dibenzanthracene & benzo[b]naphthacene.
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TL;DR: The highly fluorinated polyimide dielectric showed negligible hysteresis and a notable gate bias stability under both a N2 environment and ambient air, and a better crystalline morphology in the semiconductor film grown over their surfaces.
Abstract: Organic field-effect transistors (OFETs) that operated with good electrical stability were prepared by synthesizing fluorinated polyimide (PI) gate dielectrics based on 6FDA-PDA-PDA PI and 6FDA-CF3Bz-PDA PI. 6FDA-PDA-PDA PI and 6FDA-CF3Bz-PDA PI contain 6 and 18 fluorine atoms per repeat unit, respectively. These fluorinated polymers provided smooth surface topographies and surface energies that decreased as the number of fluorine atoms in the polymer backbone increased. These properties led to a better crystalline morphology in the semiconductor film grown over their surfaces. The number of fluorine atoms in the PI backbone increased, the field-effect mobility improved, and the threshold voltage shifted toward positive values (from -0.38 to +2.21 V) in the OFETs with pentacene and triethylsilylethynyl anthradithiophene. In addition, the highly fluorinated polyimide dielectric showed negligible hysteresis and a notable gate bias stability under both a N2 environment and ambient air.
44 citations
TL;DR: In this paper, an n-channel and ambipolar organic field-effect transistors with a few tens of nanometer channel length were fabricated and characterized, and the shortest channel length of 15nm was obtained.
Abstract: N-channel and ambipolar organic field-effect transistors (OFETs) with a few tens of nanometer channel length were fabricated and characterized. N,N′-bis(n-octyl)-dicyanoperylene-3,4:9,10-bis(dicarboximide) (PDI-8CN2) was employed as the active semiconductor and yielded a linear regime electron mobility of 2.3×10−3cm2∕Vs at 5×105V∕cm in an OFET with channel length of 15nm. An ambipolar heterostructure transistor consisting of thin layers of PDI-8CN2 and pentacene was fabricated with channel length of about 23nm. Field-effect hole and electron mobilities of 9.2×10−3 and 4.0×10−3cm2∕Vs, respectively, are obtained at 5×105V∕cm. These results represent the shortest channel length n-channel and ambipolar organic transistors that have been fabricated.
44 citations
TL;DR: In this paper, an organic complementary inverter with N,N'-ditridecyl-3,4,9,10-perylenetetetracarboxylic diimide as an n-type semiconductor and pentacene as a p-type polysilicon was described.
Abstract: The authors describe an organic complementary inverter with N,N'-ditridecyl-3,4,9,10-perylenetetracarboxylic diimide as an n-type semiconductor and pentacene as a p-type semiconductor. Each transistor of the inverter exhibited high carrier mobility: 1.62cm 2 /Vs for an n-type drive transistor and 0.57 cm 2 /Vs for a p-type switch transistor. The gain of the inverter reached 125. Another inverter using Ta 2 O 5 as a high K gate dielectric performed well with a gain of 500 and an operation voltage of only 5 V.
44 citations
TL;DR: In this article, a pentacene nanocrystal transistor with carbon nanotube electrodes as a nanosize source and drain was realized, which showed controllable transistor operation at room temperature and Coulomb blockade oscillations at 4.2K.
Abstract: A pentacene nanocrystal transistor with carbon nanotube electrodes as a nanosize source and drain was realized. In the device fabrication, the evaporated pentacene selectively grew around the nanotube electrodes. This may be caused by the common nanounit combination of the carbon six-membered ring contained in the pentacene and the nanotube. The nanotransistor showed controllable transistor operation at room temperature and Coulomb blockade oscillations at 4.2K in gate voltage characteristics.
44 citations
TL;DR: In this article, molecular dynamics simulations were performed for multi-layer pentacene thin films using a simple model surface, and two polymorphs, low temperature (LT) and high temperature (HT), were compared by examining their stability on a substrate and under free surface conditions.
Abstract: Molecular dynamics simulations were performed for multi-layer pentacene thin films using a simple model surface. Two pentacene polymorphs, low-temperature (LT) and high-temperature (HT), were compared by examining their stability on a substrate and under free surface conditions. It was found that the LT polymorph was destabilised by the presence of substrate and free surface effects, which transformed the HT-polymorph over the course of our simulations. Suppression of the molecular fluctuations along the long molecular axis by these surface effects was suggested as the source of this destabilisation.
44 citations