Publications de Gaëtan Wicht | EPFL Graph Search

Diyne-Functionalized Fullerene Self-Assembly for Thin Film Solid-State Polymerization

Raffaele Mezzenga, Gaëtan Wicht, Roland Hany, Jakob Heier

C-60 fullerene derivatives bearing aliphatic chains can self-assemble into versatile supramolecular structures. Cross-linking of such self-assembled morphologies is an attractive approach to enhance the structural stability of these self-organized structur ...

American Chemical Society2014

Growth and Alignment of Thin Film Organic Single Crystals from Dewetting Patterns

Raffaele Mezzenga, Gaëtan Wicht, Thomas Geiger, Gian-Luca Bona, Roland Hany, Jakob Heier

Studying and understanding the conditions under which organic semiconductors can be engineered to form aligned single crystals in thin films is of primary importance owing to their unique orientation-dependent optoelectronic properties. Efforts to reach th ...

Amer Chemical Soc2013

Influence of crystalline titanium oxide layer smoothness on the performance of inverted organic bilayer solar cells

Gaëtan Wicht, Thomas Andreas Lanz, Hui Zhang, Roland Hany

Due to the small exciton diffusion length in organic materials, the donor-acceptor heterointerface in simple bilayer solar cells must be placed in close proximity to the bottom electrode. This makes great demands on the planarity of the base layer, since a ...

Amer Inst Physics2013

Stability of bilayer trimethine cyanine dye/fullerene organic solar cells

Gaëtan Wicht, Hui Zhang, Roland Hany, Lei Wang

The long-term (up to 100 days) stabilities of thin films of a trimethine cyanine dye (Cy3-P) and of Cy3-P/C-60 bilayer solar cells with initial power conversion efficiencies of up to 3.6% in the regular and inverted device architecture were studied. For st ...

Elsevier Science Bv2013

Low-loss polymer waveguides on nanoporous layers

Libero Zuppiroli, Rolando Ferrini, Gaëtan Wicht

Multimode planar polymer waveguides were fabricated on hybrid polymer nanoporous layers with a fast industrial aqueous-based method well adapted to coat large-surface plastic substrates and easily scalable up to economical mass production volumes. Using a ...

American Institute of Physics2011

Couches minces nanoporeuses pour la réalisation de dispositifs optiques

Gaëtan Wicht

The physical-chemical properties of polymer films can be modified by embedding inorganic materials (e. g. inorganic nanoparticles) into the polymer matrix. Depending both on the material properties (e. g. nanoparticles concentration) and on the fabrication ...

EPFL2010

Nanoporous films with low refractive index for large-surface broad-band anti-reflection coatings

Libero Zuppiroli, Rolando Ferrini, Gaëtan Wicht

Nowadays, nanoporous films are widely employed in biochemical applications or in opto-photonic devices such as displays, solar cells, or light-guiding systems. In particular, the technological feasibility of nanoporous layers with low refractive indices ha ...

Wiley-Blackwell2010