Concept

P–n junction

Related publications (320)

Low-conductivity doped layers for improved performance of thin film silicon solar cells on highly textured substrate

Christophe Ballif, Corsin Battaglia, Matthieu Despeisse, Mathieu Gérard Boccard, Grégory Bugnon, Thomas Söderström, Michael Elias Stückelberger, Gaetano Parascandolo, Peter Cuony, Fanny Sculati-Meillaud, Simon Hänni, Adrian Billet, Mathieu Charrière, Nils Linus Löfgren

The performances of thin film silicon solar cells are reported for the use of increasingly rough zinc-oxide (ZnO) front electrodes. Experimental results show that textured substrates favor increased light trapping but also the local creation of undesired c ...

2010

Internal electric field and fill factor of amorphous silicon (a-Si:H) solar cells

Arvind Shah, Matthieu Despeisse, Michael Elias Stückelberger, Fanny Sculati-Meillaud

The electric field E within the i-layer of hydrogenated amorphous silicon (a-Si:H) solar cells strongly affects the cell performances, and, specifically, the fill factor FF. It governs the drift length Ldrift = μτE which is the crucial parameter limiting c ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Transparent polycrystalline alumina using spark plasma sintering: Effect of Mg, Y and La doping

Paul Bowen, Michael Stuer, Ulrich Aschauer, Zhe Zhao

Transparent polycrystalline alumina (PCA) is a promising replacement for sapphire. Its optical properties however are highly dependent on the grain size and residual porosity which need to be controlled for real inline transmittances (RIT), that are high e ...

2010

Partially reflective surface antenna with dynamic beamwidth control

Julien Perruisseau-Carrier, Tomislav Debogovic

The dynamic control of the beamwidth of a partially reflective surface (PRS) antenna is reported for the first time. First, a design methodology is proposed by revisiting the PRS antenna theory from the perspective of its reconfigurable beamwidth operation ...

Institute of Electrical and Electronics Engineers2010

A circuit-level substrate current model for smart-power ICs

Maher Kayal, Jean-Michel Sallese, François Krummenacher, Marc Pastre, Fabrizio Lo Conte

This paper presents a new modeling methodology accounting for generation and propagation of minority carriers that can be used directly in circuit-level simulators in order to estimate coupled parasitic currents. The model is based on a new compact model o ...

IEEE Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Integrated receiving circuit and method for radiofrequency and high speed signals

Edoardo Charbon, Marek Gersbach

Integrated receiving circuit for radiofrequency signals comprising: an amplifying element (2) using the multiplication zone (5) of a reverse biased semiconductor junction (3, 4) operating in Geiger mode for amplifying an input radiofrequency signal (Vin) a ...

2009

Refractive Index Dynamics and Linewidth Enhancement Factor in p-Doped InAs-GaAs Quantum-Dot Amplifiers

Marco Rossetti

Using a pump-probe differential transmission experiment in heterodyne detection, we measured the refractive index dynamics at the ground-state excitonic transition in electrically pumped InAs/GaAs quantum-dot amplifiers emitting near 1.3 mu m at room tempe ...

2009

Scanning photocurrent microscopy of carbon nanostructures

In this thesis, the electronic structures of low-dimensional carbon allotropes have been studied. In particular, the spatially-resolved photocurrent responses of devices comprising carbon nanostructures were investigated through scanning photocurrent micro ...

EPFL2009

Axial p-n Junctions Realized in Silicon Nanowires by Ion Implantation

Christophe Ballif

The electrical properties of vertically aligned silicon nanowires doped by ion implantation are studied in this paper by a combination of electron beam-induced current imaging and two terminal current−voltage measurements. By varying the implantation param ...

2009

Effects of magnetism in superconducting hybrid structures

Benoît Crouzy

In this thesis we study various effects of magnetism in proximity structures, composed of superconducting electrodes in contact with a normal metal. Magnetism can be present in the system through the Zeeman and the orbital coupling. Proximity structures of ...

EPFL2009

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