Publications de Morgan Mertens Stefik

Tin oxide as stable protective layer for composite cuprous oxide water-splitting photocathodes

Michael Graetzel, Morgan Mertens Stefik, Matthew Thomas Mayer, Stanley David Tilley, Marcel Roland Schreier

For a sustainable future, efficient solar energy harvesting and storage is required. Solar hydrogen production from photoelectrochemical water splitting is a promising technology and, in particular, cuprous oxide photocathodes are interesting photoelectrod ...

Elsevier Science Bv2016

High-Surface-Area Porous Platinum Electrodes for Enhanced Charge Transfer

Michael Graetzel, Francesco Stellacci, Aswani Yella, Morgan Mertens Stefik, Marcel Roland Schreier, Stefan Guldin, Yelin Hu

Cobalt-based electrolytes are highly tunable and have pushed the limits of dye-sensitized solar cells, enabling higher open-circuit voltages and new record efficiencies. However, the performance of these electrolytes and a range of other electrolytes suffe ...

Wiley-V C H Verlag Gmbh2014

On the stability enhancement of cuprous oxide water splitting photocathodes by low temperature steam annealing

Michael Graetzel, Morgan Mertens Stefik, Stanley David Tilley, Ludmilla Steier

Given the intermittent nature of solar radiation, the large-scale use of solar energy requires an efficient energy storage solution. So far, the only practical way to store such large amounts of energy is in the form of a chemical energy carrier, i.e., a f ...

Royal Soc Chemistry2014

Ruthenium Oxide Hydrogen Evolution Catalysis on Composite Cuprous Oxide Water-Splitting Photocathodes

Michael Graetzel, Morgan Mertens Stefik, Stanley David Tilley, Marcel Roland Schreier

Photocathodes based on cuprous oxide (Cu2O) are promising materials for large scale and widespread solar fuel generation due to the abundance of copper, suitable bandgap, and favorable band alignments for reducing water and carbon dioxide. A protective ove ...

Wiley-Blackwell2014

Improved Nonaqueous Synthesis of TiO2 for Dye-Sensitized Solar Cells

Michael Graetzel, Morgan Mertens Stefik, Markus Niederberger

Nonaqueous synthesis routes have emerged as a powerful platform for directly obtaining diverse metal oxide nanoparticles with high crystallinity and tunable compositions. The benzyl alcohol (BA) route, for example, has been applied toward dozens of oxides ...

American Chemical Society2013

Low temperature crystalline titanium dioxide by atomic layer deposition for dye-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Pascal Comte, Aswani Yella, Morgan Mertens Stefik, Aravind Kumar Chandiran, Leo-Philipp Heiniger

Low temperature processing of dye-sensitized solar cells (DSC) is crucial to enable commercialization with low-cost, plastic substrates. Prior studies have focused on mechanical compression of premade particles on plastic or glass substrates, however, this ...

Amer Chemical Soc2013

Carbon-graphene nanocomposite cathodes for improved Co(II/III) mediated dye-sensitized solar cells

Michael Graetzel, Jun Ho Yum, Morgan Mertens Stefik, Yelin Hu

Cobalt-based electrolytes have significantly advanced the tunability and performance of dye-sensitized solar cells. The typically used platinum cathodes are expensive and non-optimal for cobalt complexes, motivating the search for replacements. Graphene na ...

Royal Society of Chemistry2013

Transparent, conducting Nb:SnO2 for host-guest photoelectrochemistry

Michael Graetzel, Morgan Mertens Stefik, Nripan Mathews, Maurin Cornuz, Takashi Hisatomi

Many candidate materials for photoelectrochemical water splitting will be better employed by decoupling optical absorption from carrier transport. A promising strategy is to use multiple thin absorber layers supported on transparent, conducting materials; ...

American Chemical Society (ACS)2012

Enhancement in the Performance of Ultrathin Hematite Photoanode for Water Splitting by an Oxide Underlayer

Michael Graetzel, Kevin Sivula, Morgan Mertens Stefik, Nripan Mathews, Takashi Hisatomi

Wiley-Blackwell2012

Layer-by-Layer Formation of Block-Copolymer-Derived TiO2 for Solid-State Dye-Sensitized Solar Cells

Henry Snaith, Morgan Mertens Stefik, Stefan Guldin

Wiley-Blackwell2011