Concept

Oxyde de zinc

Publications associées (563)

MICROCRYSTALLINE SILICON SOLAR CELLS: EFFECT OF SUBSTRATE TEMPERATURE ON CRACKS

Single junction microcrystalline silicon solar cells presently reach confirmed efficiencies up to 10.1%. Further improvement on device quality is now necessary to continuously increase the electrical performances of the solar cells. Zones of porous materia ...

2009

Surface oxide in replicated microcellular aluminium and its influence on the plasticity size effect

Andreas Mortensen, Frédéric Diologent

The oxide film present along the interface between metal and pores in microcellular aluminium produced by replication depends on the leaching medium that is used to dissolve the NaCl preform: leaching in water produces a thick and irregular multilayered hy ...

2009

Monolithic Integration of Silicon Nanowires With a Microgripper

Michail Zervas, Yusuf Leblebici, Mustafa Yilmaz, Özgür Özsun, Izzet Yildiz

Si nanowire (NW) stacks are fabricated by utilizing the scalloping effect of inductively coupled plasma deep reactive ion etching. When two etch windows are brought close enough, scallops from both sides will ideally meet along the dividing centerline of t ...

Institute of Electrical and Electronics Engineers2009

Photocatalytic Redox Reactions for In-Source Peptide Fragmentation

Hubert Girault, Jérôme Waser, Liang Qiao, Hongyan Bi

In-source photocatalytic redox reactions based on a photosensitive target plate have been developed to realize peptide fragmentation during laser desorption ionization. Sample peptides and glucose are simply deposited on a spot of sintered TiO2 nanoparticl ...

2009

Catalytic Asymmetric Passerini-Type Reaction: Chiral Aluminum-Organophosphate-Catalyzed Enantioselective alpha -Addition of Isocyanides to Aldehydes

Jieping Zhu

A chiral Lewis acid catalyst was prepd. by mixing 2 equiv of chiral binol-derived organophosphoric acid and 1 equiv of Et2AlCl. In the presence of a catalytic amt. of [I]2Al(III)Cl complex (0.05 equiv), reaction between alpha -isocyanoacetamides and aldehy ...

2009

LPCVD GROWTH OF ZNO FOR SOLAR CELL APPLICATIONS

Christophe Ballif, Sylvain Nicolay, Sylvie Faÿ

A growth model for the low pressure chemical vapor deposition (LPCVD) of polycrystalline ZnO thin films is proposed. This model is based on experimental observations of the surface morphology and crystallographic orientations of the layers at different thi ...

2009

TCOs for nip thin film silicon solar cells

Christophe Ballif, Franz-Josef Haug, Xavier Niquille, Thomas Söderström

Substrate configuration allows for the deposition of thin film silicon (Si) solar cells on non-transparent substrates such as plastic sheets or metallic foils. In this work, we develop processes compatible with low Tg plastics. The amorphous Si (a-Si:H) an ...

2009

Optical and electronic properties of dye-sensitized heterojunction solar cells

Peter Chen

This research studies the optical and electronics properties of Solid-State Dye-Sensitized Solar cells (SSDSCs). The propagation of light inside dye anchored TiO2 mesoporous layer includes scattering and absorption of photons. The light absorption behavior ...

EPFL2009

Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mingkui Wang, Péter Kalman Péchy, Xuan Li

We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of din ...

2009

Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors

Verner Thorsmolle

We present a comparative study of ultrafast photoconversion dynamics in tetracene (Tc) and pentacene (Pc) single crystals and Pc films using optical pump-probe spectroscopy. Photoinduced absorption in Tc and Pc crystals is activated and temperature-indepen ...

2009

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