Publications de Stéphane Suarez

Crystallization and Organic Field-Effect Transistor Performance of a Hydrogen-Bonded Quaterthiophene

Rosario Scopelliti, Holger Frauenrath, Anne-Clémence Corminboeuf, Philippe Bugnon, Stéphane Suarez, Riccardo Petraglia, Bilal Özen, Jan Gebers, Piotr De Silva

Crystalline thin films of pi-conjugated molecules are relevant as the active layers in organic electronic devices. Therefore, materials with enhanced control over the supramolecular arrangement, crystallinity, and thin-film morphology are desirable. Herein ...

2020

Solubility and Crystallizability: Facile Access to Functionalized pi-Conjugated Compounds with Chlorendylimide Protecting Groups

Rosario Scopelliti, Holger Frauenrath, Jan Cornelius Brauer, Jan Gebers, Stéphane Suarez, Damien Rolland, Roman Niklaus Marty, Luca Cervini

Functional pi-conjugated molecules are relevant for the preparation of new organic electronic materials with improved performance. However, their synthesis is often rendered difficult by their inherently low solubility, and the permanent attachment of solu ...

Wiley-V C H Verlag Gmbh2015

Color conversion films comprising polymer-substituted organic fluorescent dyes

Libero Zuppiroli, Holger Frauenrath, Rolando Ferrini, Stéphane Suarez, Roman Niklaus Marty

The present invention concerns a color conversion film comprising at least one active layer, said layer comprising an organic fluorescent dye containing a fluorescent core, wherein said dye is substituted with at least one polymer segment. It also concerns ...

2012

From oxide surface to organic transistor properties: the nature and the role of oxide gate surface defects

Libero Zuppiroli, Stéphane Suarez, Franziska Dora Fleischli

By applying various surface treatments to the oxide gate of pentacene transistors, both in vacuum (H2, O2 and Ar plasma treatments) and in aqueous solution, we were able to vary the balance between oxygen-free radicals (Si•), oxygen-centered radicals (Si−O ...

American Chemical Society2010

Organic thin-film transistors: the passivation of the dielectric-pentacene interface by dipolar self-assembled monolayers

Libero Zuppiroli, Stéphane Suarez, Franziska Dora Fleischli

In organic thin-film transistors (OTFTs), the conducting channel is located near the interface between the organic semiconductor and the oxide dielectric; this interface is crucial for transistor performance. Self-assembled monolayers (SAMs) on the interfa ...

American Chemical Society2010

An ester-substituted iridium complex for efficient vacuum-processed organic light-emitting diodes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti, Libero Zuppiroli, Philippe Bugnon, Stéphane Suarez

An orange-red-emitting iridium complex (N958) was prepared, and its photophysical and device-based characteristics were investigated. Despite N958 displaying quite poor photophysical properties in solution (acetonitrile), organic light-emitting diode (OLED ...

2009

Sublimation Not an Innocent Technique: A Case of Bis-Cyclometalated Iridium Emitter for OLED

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti, Libero Zuppiroli, Philippe Bugnon, Stéphane Suarez

Isomerization of a neutral bis-cyclometalated iridium(III) complex has been observed for the first time during the preparation of vacuum-processed organic light-emitting devices (OLEDs) and reproduced in solution. Isolation of the isomer revealed a cis org ...

2008

Introducing bulky functional lanthanide cores into thermotropic metallomesogens: a bottom-up approach

Rosario Scopelliti, Jean-Claude Bünzli, Stéphane Suarez

Basic thermodynamic considerations are used to rationalize the formation of thermotropic mesophases incorporating aromatic ligands for trivalent lanthanide metal ions (Ln). Standard flat and bent molecular interfaces, separating the central binding unit fr ...

2006

Lanthanide luminescent mesomorphic complexes with macrocycles derived from diaza-18-crown-6

Rosario Scopelliti, Jean-Claude Bünzli, Stéphane Suarez

Four tetracatenar (L1–L4) and one hexacatenar (L5) ligands, derived from the diaza-18-crown-6 framework, are synthesized and characterized. In these ligands, the amine functions are fitted with benzoyloxybenzyl linker groups, attached either with a carbony ...

2005

Auto-organisation de complexes de lanthanide dans des structures supramoléculaires : synthèse, propriétés mésomorphes et photophysiques de cristaux liquides luminescents

Stéphane Suarez

This work describes the synthesis as well as the photophysical and mesomorphic properties of new luminescent liquid crystals able to emit narrow bands in the visible range, and featuring lanthanide ions incorporated into pro-mesogenic coronands. In order t ...

EPFL2004