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Publications associées (31)

Influence of the bias-dependent emission zone on exciton quenching and OLED efficiency

Beat Ruhstaller, Markus Regnat

We present an electro-optical model of a three-layer phosphorescent OLED which accurately describes the measured current efficiency and transient electroluminescence decay for different biases. Central findings are a bias-dependent emission zone, which inf ...

2019

Pyrazolium Ionic Liquid Co-catalysts for the Electroreduction of CO2

Paul Joseph Dyson, Dmitry Vasilyev, Erfan Shirzadi

Pyrazolium ionic liquids (Pz ILs) were employed as co-catalysts for electrochemical conversion of CO2 to CO on a silver disk electrode, leading to a significant decrease in the onset potential for the reduction (ca. 500 mV). The electrochemical conversion ...

2018

Characterisation of a 200 kW/400 kWh Vanadium Redox Flow Battery

Hubert Girault, Véronique Amstutz

The incessant growth in energy demand has resulted in the deployment of renewable energy generators to reduce the impact of fossil fuel dependence. However, these generators often suffer from intermittency and require energy storage when there is over-gene ...

2018

Electrochemical Reduction of Protic Supercritical CO2 on Copper Electrodes

Victor Costa Bassetto, Alberto Battistel, Patrick Voyame, Olga Melchaeva

The electrochemical reduction of carbon dioxide is usually studied in aqueous solutions under ambient conditions. However, the main disadvantages of this method are high hydrogen evolution and low faradaic efficiencies of carbon-based products. Supercritic ...

Wiley-VCH Verlag Berlin2017

All Solution-Processed, Hybrid Organic-Inorganic Photocathode for Hydrogen Evolution

Michael Graetzel, Matthew Thomas Mayer, Marcel Roland Schreier

Nowadays, the efficient, stable, and scalable conversion of solar energy into chemical fuels represents a great scientific, economic, and ethical challenge. Amongst the available candidate technologies, photoelectrochemical water splitting potentially has ...

Amer Chemical Soc2017

Tailoring Copper Nanocrystals towards C-2 Products in Electrochemical CO2 Reduction

Raffaella Buonsanti, Anna Loiudice, Esmail Kamali Ardekani

Favoring the CO2 reduction reaction (CO2RR) over the hydrogen evolution reaction and controlling the selectivity towards multicarbon products are currently major scientific challenges in sustainable energy research. It is known that the morphology of the c ...

Wiley-Blackwell2016

A Gibeon meteorite yields a high-performance water oxidation electrocatalyst

Paul Joseph Dyson, Arnaud Magrez, Kevin Sivula, Florian Le Formal, Aswin Gopakumar, Nestor Guijarro Carratala, Mathieu Steven Prévot, Wiktor Stefan Bourée, Charlotte Marie Sornay, Julie Voit

Examining the electrocatalytic performance of naturally-occurring metallic minerals is of interest for energy conversion applications given their unique atomic composition and formation history. Herein, we report the electrocatalytic function of an iron-ba ...

2016

Polymer-based photocathodes with a solution-processable cuprous iodide anode layer and a polyethyleneimine protective coating

Michael Graetzel, Matthew Thomas Mayer, Marcel Roland Schreier

Organic semiconductors have been proven to be suitable for efficient photovoltaic generation during the last decade but have been scarcely assessed as photoelectrochemical devices. In this work we present the fabrication and characterization of a new effic ...

Royal Society of Chemistry2016

Minimization of Ionic Transport Resistance in Porous Monoliths for Application in Integrated Solar Water Splitting Devices

Sophia Haussener

Monolithic solar water splitting devices consist of photovoltaic materials integrated with electrocatalysts and produce solar hydrogen by water splitting upon solar illumination in one device. Upscaling of monolithic solar water splitting devices is obstru ...

American Chemical Society2016

Templating Sol-Gel Hematite Films with Sacrificial Copper Oxide: Enhancing Photoanode Performance with Nanostructure and Oxygen Vacancies

Kevin Sivula, Nestor Guijarro Carratala, Xavier Adrian Jeanbourquin, Yang Li, Mathieu Steven Prévot, Yuehui Li

Nanostructuring hematite films is a critical step for enhancing photoelectrochemical performance by circumventing the intrinsic limitations on minority carrier transport. Herein, we present a novel sol-gel approach that affords nanostructured hematite film ...

Amer Chemical Soc2015

Highly-Ordered Magneli Ti4O7 Nanotube Arrays as Effective Anodic Material for Electro-oxidation

Christos Comninellis, Caroline Miles

Pure Magneli Ti4O7 nanotube arrays (NTA) were successfully fabricated by reducing TiO2 NTA with hydrogen at 850 degrees C for 30 minutes. The microstructure, composition and electrochemical behavior of the prepared Ti4O7 NTA were characterized by means of ...

Pergamon-Elsevier Science Ltd2015

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