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Frank Nüesch

Cette personne a quitté l’EPFL

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Publications associées (85)

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Crossover from capacitive to pseudoinductive charge-relaxation in organic/polymeric light-emitting diodes

Frank Nüesch, Libero Zuppiroli

In this work we propose a phenomenological microscopic approach to deal with pseudoinductive charge-relaxation processes (named also as negative capacitance phenomena) in organic molecules (tris-8-hydroxyquinoline-aluminum) and polymeric [poly(2-metoxy-5-( ...

AIP2005

Charge generation by ultra-stretchable elastomeric electrets

Frank Nüesch, Yee Song Ko

Novel piezoelectric elastomers are synthesized and their long term stability and piezoelectric properties are investigated. They are thin film composites of specially designed polymer nanoparticles with high glass transition temperatures (T-g) and side gro ...

Royal Society of Chemistry2017

Visible light-emitting host-guest electrochemical cells using cyanine dyes

Frank Nüesch, Jakob Heier, Lei Wang, Surendra Babu Anantharaman

Light-emitting electrochemical cells (LECs) can be fabricated as a single emissive organic/salt layer sandwiched between two electrodes, offering cost-effective next generation signage and lighting applications. Cyanine dyes are especially attractive to ex ...

Elsevier Science Bv2017

Frequency dependent dielectric and mechanical behaviour of elastomers for actuator applications

Jan-Anders Edvin Maansson, Yves Leterrier, John Christopher Plummer, Frank Nüesch

The low frequency mechanical and dielectric behavior of three different elastomers has been investigated by dynamic mechanical analysis and dielectric spectroscopy, with the aim of accounting for the frequency dependence of the characteristics of the corre ...

American Institute of Physics2009

Optimized Electrolyte Loading and Active Film Thickness for Sandwich Polymer Light-Emitting Electrochemical Cells

Frank Nüesch, Matthias Diethelm

Effects of ion concentration and active layer thickness play a critical role on the performance of light-emitting electrochemical cells. Expanding on a pioneering materials system comprising the super yellow (SY) polymer and the electrolyte trimethylolprop ...

2019

Insights into the Overcharge-Induced Failure Mechanism of Lithium–Sulfur Batteries

Frank Nüesch, Mohammad Jafarpour, Shungui Deng

In the pursuit of durable lithium–sulfur (Li–S) batteries, considerable research has been devoted to extending cycle life by developing advanced cathode materials. However, there exists a common overcharging problem which leads to the disfunction of Li–S b ...

2025

Photomultiplication Enabling Efficient Shortwave Infrared-Sensitive Organic Upconversion Devices

Frank Nüesch, Wei-Hsu Hu, Elodie Didier

Organic upconverters made by integrating an infrared-sensitive photodetector with a light-emitting diode offer a low-cost route to visualize images taken in the infrared. However, making such devices sufficiently efficient is challenging. Here, upconversio ...

WILEY-V C H VERLAG GMBH2024

Pyroelectricity in poled all-organic polar polynorbornene/polydimethylsiloxane-based stretchable electrets

Frank Nüesch, Francis Owusu

Pyroelectricity in a recently developed all-organic composite electret with a polar polynorbornene-based filler and polydimethylsiloxane (PDMS) matrix has been studied with the help of thermal and dielectric techniques. Measurement of the pyroelectric p co ...

Royal Society of Chemistry2024

Synthesis of solvent-free processable and on-demand cross-linkable dielectric elastomers for actuators

Frank Nüesch

Dielectric elastomer actuators (DEAs) have gained growing interest during the last decade from both the scientific community and industry. However, the high operating voltages needed to drive these actuators reduce their application potential. To date, sev ...

Royal Society of Chemistry2019

Impact of the turbulence wavenumber spectrum and probing beam geometry on Doppler reflectometry perpendicular velocity measurements

Frank Nüesch

The perpendicular propagation velocity of turbulent density fluctuations is an important parameter in fusion plasmas, since sheared plasma flows are crucial for reducing turbulence, and thus an essential input parameter for turbulent transport simulations. ...

IOP Publishing Ltd2023

All-in-One Deposition to Synergistically Manipulate Perovskite Growth for High-Performance Solar Cell

Frank Nüesch, Hui Zhang, Jie Wu

Nonradiative recombination losses originating from crystallographic distortions and issues occurring upon interface formation are detrimental for the photovoltaic performance of perovskite solar cells. Herein, we incorporated a series of carbamide molecule ...

2020

Co-sensitization of Organic Dyes for Efficient Ionic Liquid Electrolyte-based Dye-Sensitized Solar Cell

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Sun Hee Kim, Frank Nüesch, Pascal Comte

2007

Influence of Molybdenum Oxide Interface Solvent Sensitivity on Charge Trapping in Bilayer Cyanine Solar Cells

Frank Nüesch

Bilayer organic solar cells based on trimethine cyanine donor and C-60 acceptor materials have been fabricated by coating the trimethine dye from solution on molybdenum oxide (MoO3) anode buffer layer. The choice of deposition solvent drastically influence ...

Amer Chemical Soc2014

High k Dielectric Elastomeric Materials for Low Voltage Applications

Jan-Anders Edvin Maansson, Yves Leterrier, John Christopher Plummer, Frank Nüesch

2009

Elastomers with tunable dielectric and electromechanical properties

Frank Nüesch

Novel electroresponsive silicone elastomers modified with nitrile groups are presented, whose dielectric permittivity (epsilon') is tuned from epsilon' = 4.3 to epsilon' = 17.4. They are prepared in a one-step process starting from a high molecular weight ...

Royal Society of Chemistry2016

Influence of Frequency Dependent Dielectric and Mechanical Properties on the Performance for Dielectric Elastomers Actuators

Jan-Anders Edvin Maansson, Yves Leterrier, John Christopher Plummer, Frank Nüesch

2010

Synthesis of novel cyanine-fullerene dyads for photovoltaic devices

Frank Nüesch, Libero Zuppiroli

Two novel cyanine-fullerene dyads have been synthesized by means of the Prato reaction from the corresponding cyanine-aldehyde, N-methylglycine and C60. As well as a thorough characterization using MS-TOF, 1H-NMR, 13C-NMR a ...

Royal Society of Chemistry2005

Routes for Efficiency Enhancement in Fluorescent TADF Exciplex Host OLEDs Gained from an Electro-Optical Device Model

Frank Nüesch, Markus Regnat

Fluorescence-based organic light-emitting diodes (OLEDs) using thermally activated delayed fluorescence (TADF) have increasingly attracted attention in research and industry. One method to implement TADF is based on an emitter layer composed of an exciplex ...

WILEY2020

Continuous Production of Tailored Silver Nanoparticles by Polyol Synthesis and Reaction Yield Measured by X-ray Absorption Spectroscopy: Toward a Growth Mechanism

Christian Ludwig, Heinrich Hofmann, Paul Bowen, Frank Nüesch, Andrea Testino, Jose Enrico Quijano Quinsaat

Two complementary topics are discussed: (i) the continuous production of silver nanoparticles (AgNPs) and (ii) the measurement of reaction yield by X-ray absorption near-edge spectroscopy (XANES). The continuous polyol synthesis of AgNPs in grams amount an ...

Amer Chemical Soc2014

Solvent-Free Synthesis and Processing of Conductive Elastomer Composites for Green Dielectric Elastomer Transducers

Frank Nüesch

Stretchable electrodes are more suitable for dielectric elastomer transducers (DET) the closer the mechanical characteristics of the electrodes and elastomer are. Here, a solvent-free synthesis and processing of conductive composites with excellent electri ...

WILEY-V C H VERLAG GMBH2022