Concept

Space charge

Related publications (125)

Charge transport mechanisms in organic and microcrystalline silicon field-effect transistors

Libero Zuppiroli, Marie-Noëlle Bussac, Steven Konezny

Several organic and inorganic materials have emerged as promising candidates for the active layer of field-effect transistors (FETs) fabricated on flexible substrates. The charge transport models necessary for device optimization in these systems are at di ...

International Society for Optical Engineering, Bellingham WA, WA 98227-0010, United States2007

Efficient evaluation of piecewise control laws defined over a large number of polyhedra

Colin Neil Jones

We consider the class of piecewise state feedback control laws applied to discrete-time systems, motivated by recent work on the computation of closed-form MPC controllers. The on-line evaluation of such a control law requires the determination of the stat ...

2007

Gate-lag and drain-lag effects in (GaN)/InAlN/GaN and InAlN/AlN/GaN HEMTs

Nicolas Grandjean, Jean-François Carlin, Marcus Gonschorek

Gate and drain-lag effects are studied in (GaN)/InAlN/GaN and InAlN/AlN/GaN HEMTs grown on sapphire. Electron trapping on the surface states between the gate and the drain forming the net negative charge up-to similar to 2 x 10(13) cm(-2) is found to be re ...

2007

The Light at the End of the Tunnel Junction - Improving the Energy Resolution of UV Single-Photon Spectrometers using Diffusion Engineering

Andreea Veronica Savu

We present experimental results which test whether diffusion engineering can increase the energy resolution of a single-photon superconducting tunnel-junction spectrometer. When a UV photon is absorbed in superconducting Al, it creates an excess number of ...

Yale University2007

Enhancing the energy resolution of a singles photon STJ spectrometer using diffusion engineering

Andreea Veronica Savu

Diffusion engineering has been proposed as an approach to increase the collected charge and energy resolution of a single-photon superconducting tunnel junction (STJ) spectrometer. We present new experimental results confirming this approach. When a photon ...

2007

Thermopower measurements on pentacene transistors

Libero Zuppiroli, Marie-Noëlle Bussac, Adrian von Mühlenen

We present the first thermoelectric measurements on pentacene field effect transistors. We report high values of the Seebeck coefficient at room temperature between 240 and 500 micro V/K depending on the dielectric surface treatment. These values are indep ...

2007

Tunable composite nanoparticle for plasmonics

Olivier Martin

We present a numerical study of the tunability properties of a plasmonic subwavelength particle deposited on a metallic slab. The particle is composed of a metallic part, supporting a localized plasmon mode, separated from the slab by a dielectric spacer. ...

Optical Society of America2006

Effects of surface site distribution and dielectric discontinuity on the charging behavior of nanoparticles. A grand canonical Monte Carlo study

Marianne Seijo, Montserrat Filella, Serge Stoll

The surface site distribution and the dielec. discontinuity effects on the charging process of a spherical nanoparticle (NP) have been investigated. It is well known that electrostatic repulsion between charges on neighboring sites tends to decrease the ef ...

Royal Society of Chemistry2006

Characterization of a thick layer a-Si : H pixel detector with TFA technology using a scanning electron microscope

Christophe Ballif, Arvind Shah, Sylvain Dunand, Matthieu Despeisse

The electron beam induced current (EBIC) technique was used to characterize a 32 μm thick hydrogenated amorphous silicon n-i-p diode deposited on top of an ASIC, containing several channels of active feedback pre-amplifiers (AFP) with peaking time of 5 ns. ...

2006

Layering at liquid metal surfaces: Friedel oscillations and confinement effects

Nicola Marzari

The structures of the liquid surface of sodium have been characterized with extensive first-principles molecular dynamics simulations based on ensemble density functional theory. Friedel oscillations in the electronic charge density at the free surface wer ...

2006

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