Publications de Jérémie Minh-Châu Brillet

Solar Energy Stored as Hydrogen : Controlling Inexpensive Oxide-based Nanostructures for Efficient Water Splitting

The tandem photoelectochemical (PEC) cell based on oxide semiconductors for water splitting offers a potentially inexpensive route for solar hydrogen generation. At the heart of the device, a nanostructured photoanode for water oxidation is connected in se ...

EPFL2012

A Ga2O3 underlayer as an isomorphic template for ultrathin hematite films toward efficient photoelectrochemical water splitting

Michael Graetzel, Kevin Sivula, Nicolas Tétreault, Florian Le Formal, Maurin Cornuz, Jérémie Minh-Châu Brillet, Takashi Hisatomi

Hematite photoanodes for photoelectrochemical (PEC) water splitting are often fabricated as extremely-thin films to minimize charge recombination because of the short diffusion lengths of photoexcited carriers. However, poor crystallinity caused by structu ...

2012

Highly efficient water splitting by a dual-absorber tandem cell

Michael Graetzel, Kevin Sivula, Jun Ho Yum, Maurin Cornuz, Jérémie Minh-Châu Brillet, Takashi Hisatomi

Photoelectrochemical water-splitting devices, which use solar energy to convert water into hydrogen and oxygen, have been investigated for decades. Multijunction designs are most efficient, as they can absorb enough solar energy and provide sufficient free ...

Nature Publishing Group2012

Solar hydrogen production with semiconductor metal oxides: new directions in experiment and theory

Michael Graetzel, Kevin Sivula, Florian Le Formal, Jérémie Minh-Châu Brillet

An overview of a collaborative experimental and theoretical effort toward efficient hydrogen production via photoelectrochemical splitting of water into di-hydrogen and di-oxygen is presented here. We present state-of-the-art experimental studies using hem ...

2012

Improved electrode

Michael Graetzel, Nicolas Tétreault, Jérémie Minh-Châu Brillet

The present invention provides a generic electrode for photovoltaics, water splitting cells or any electro-chemical device where a three-dimensional transparent conductive backbone provides efficient charge extraction and can support an active guest materi ...

2011

High-Efficiency Dye-Sensitized Solar Cell with Three-Dimensional Photoanode

Michael Graetzel, Shaik Mohammed Zakeeruddin, Nicolas Tétreault, Thomas Moehl, Jérémie Minh-Châu Brillet, Leo-Philipp Heiniger

Herein, we present a straightforward bottom-up synthesis of a high electron mobility and highly light scattering macroporous photoanode for dye-sensitized solar cells. The dense three-dimensional Al/ZnO, SnO2, or TiO2 host integrates a conformal passivatio ...

American Chemical Society2011

Cathodic shift in onset potential of solar oxygen evolution on hematite by 13-group oxide overlayers

Michael Graetzel, Kevin Sivula, Nicolas Tétreault, Florian Le Formal, Maurin Cornuz, Jérémie Minh-Châu Brillet, Takashi Hisatomi

The onset potential of photoelectrochemical water oxidation on ultrathin hematite was improved by up to 200 mV by the chemical bath deposition of 13-group oxides as overlayers. It is proposed that the corundum-type overlayers released lattice strain of the ...

2011

High-Efficiency Solid-State Dye-Sensitized Solar Cells: Fast Charge Extraction through Self-Assembled 3D Fibrous Network of Crystalline TiO2 Nanowires

Michael Graetzel, Shaik Mohammed Zakeeruddin, László Forró, Arnaud Magrez, Endre Horvath, Nicolas Tétreault, Peng Wang, Thomas Moehl, Rita Smajda, Laurent Gabriel Félix Alexandre Stéphane Bungener

Herein, we present a novel morphology for solid-state dye-sensitized solar cells based on the simple and straightforward self-assembly of nanorods into a 3D fibrous network of fused single-crystalline anatase nanowires. This architecture offers a high roug ...

American Chemical Society2010

Decoupling Feature Size and Functionality in Solution-Processed, Porous Hematite Electrodes for Solar Water Splitting

Michael Graetzel, Kevin Sivula, Jérémie Minh-Châu Brillet

We introduce a simple solution-based strategy to decouple morphological and functional effects of annealing nanostructured, porous electrodes by encapsulation with a SiO2 confinement scaffold before high temperature treatment We demonstrate the effectivene ...

American Chemical Society2010

Examining architectures of photoanode-photovoltaic tandem cells for solar water splitting

Michael Graetzel, Kevin Sivula, Jun Ho Yum, Florian Le Formal, Maurin Cornuz, Jérémie Minh-Châu Brillet

Given the limitations of the materials available for photoelectrochemical water splitting, a multiphoton (tandem) approach is required to convert solar energy into hydrogen efficiently and durably. Here we investigate a promising system consisting of a hem ...

Cambridge University Press2010