Publications de Andrea Feltrin

Microcrystalline and micromorph device improvements through combined plasma and material characterization techniques

Christophe Ballif, Grégory Bugnon, Andrea Feltrin, Gaetano Parascandolo, Benjamin Strahm

Hydrogenated microcrystalline silicon (μc-Si:H) growth by very high frequency plasma-enhanced chemical vapor deposition (VHF-PECVD) is studied in an industrial-type parallel plate KAI reactor. Combined plasma and material characterization techniques allow ...

Elsevier B.V Amsterdam2011

High-rate deposition of microcrystalline silicon in a large-area PECVD reactor and integration in tandem solar cells

Christophe Ballif, Grégory Bugnon, Andrea Feltrin, Gaetano Parascandolo

We study the high-rate deposition of microcrystalline silicon in a large-area plasma-enhanced chemical-vapor-deposition (PECVD) reactor operated at 40.68 MHz, in the little-explored process conditions of high-pressure and high-silane concentration and depl ...

2010

ZnO Transparent conductive oxide for thin film silicon solar cells

Christophe Ballif, Franz-Josef Haug, Matthieu Despeisse, Mathieu Gérard Boccard, Sylvain Nicolay, Grégory Bugnon, Sylvie Faÿ, Andrea Feltrin, Peter Cuony, Thomas Söderström

There is general agreement that the future production of electric energy has to be renewable and sustainable in the long term. Photovoltaic (PV) is booming with more than 7GW produced in 2008 and will therefore play an important role in the future electric ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2010

Resistive interlayer for improved performance of thin film silicon solar cells on highly textured substrate

Christophe Ballif, Matthieu Despeisse, Grégory Bugnon, Andrea Feltrin, Michael Elias Stückelberger, Peter Cuony, Adrian Billet

The deposition of thin-film silicon solar cells on highly textured substrates results in improved light trapping in the cell. However, the growth of silicon layers on rough substrates can often lead to undesired current drains, degrading performance and re ...

AIP American Institute of Physics2010

Input silane concentration effect on the a-Si:H to uc-Si:H transition width

Christophe Ballif, Christoph Hollenstein, Grégory Bugnon, Andrea Feltrin, Benjamin Strahm, Fanny Sculati-Meillaud

In this work the microstructure transition width from amorphous to microcrystalline silicon is discussed. It is shown that the width of the transition depends on the input silane concentration level and indirectly on the silane depletion level. The higher ...

2010

Research and developments in thin film silicon photovoltaics

Christophe Ballif, Franz-Josef Haug, Matthieu Despeisse, Grégory Bugnon, Sylvie Faÿ, Andrea Feltrin, Thomas Söderström, Gaetano Parascandolo, Martin Python

The increasing demand for photovoltaic devices and the associated crystalline silicon feedstock demand scenario have led in the past years to the fast growth of the thin film silicon industry. The high potential for cost reduction and the suitability for b ...

2009

Laser applications in thin-film photovoltaics

Christophe Ballif, Andrea Feltrin, Benjamin Strahm

We review laser applications in thin-film photovoltaics (thin-film Si, CdTe, and Cu(In,Ga)Se2 solar cells). Lasers are applied in this growing field to manufacture modules, to monitor Si deposition processes, and to characterize opto-electrical properties ...

Springer Verlag2009

Optical emission spectroscopy to diagnose powder formation in SiH4-H2 discharges

Christophe Ballif, Andrea Feltrin, Benjamin Strahm

Silane and hydrogen discharges are widely used for the deposition of silicon thin film solar cells in large area plasmaenhanced chemical vapor deposition reactors. In the case of microcrystalline silicon thin film solar cells, it is of crucial importance t ...

2009

Silane depletion dependent ion bombardment and material quality of microcrystalline silicon deposited by VHF-PECVD

Christophe Ballif, Grégory Bugnon, Julien Claude Bailat, Andrea Feltrin

Microcrystalline silicon is a composite material embedding silicon nanocrystals in an amorphous matrix [1]. It has attracted much research efforts in the photovoltaic domain [2], because of its potential for integration in a tandem cell concept as bottom c ...

2009

Influence of pressure and silane depletion on microcrystalline silicon material quality and solar cell performance

Christophe Ballif, Grégory Bugnon, Julien Claude Bailat, Andrea Feltrin

Hydrogenated microcrystalline silicon growth by very high frequency plasma-enhanced chemical vapor deposition is investigated in an industrial-type parallel plate R&D KAI (TM) reactor to study the influence of pressure and silane depletion on material qual ...

2009