Publications by Stanley David Tilley

Spectroelectrochemical analysis of the mechanism of (photo)electrochemical hydrogen evolution at a catalytic interface

Michael Graetzel, Florian Le Formal, Stanley David Tilley, Matthew Thomas Mayer

Multi-electron heterogeneous catalysis is a pivotal element in the ( photo) electrochemical generation of solar fuels. However, mechanistic studies of these systems are difficult to elucidate by means of electrochemical methods alone. Here we report a spec ...

Springer Nature2017

Band Alignment Engineering at Cu2O/ZnO Heterointerfaces

Michael Graetzel, Stanley David Tilley

Energy band alignments at heterointerfaces play a crucial role in defining the functionality of semiconductor devices, yet the search for material combinations with suitable band alignments remains a challenge for numerous applications. In this work, we de ...

Amer Chemical Soc2016

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

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

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

Photoelectrochemical Hydrogen Production in Alkaline Solutions Using Cu2O Coated with Earth-Abundant Hydrogen Evolution Catalysts

Michael Graetzel, Xile Hu, Stanley David Tilley, Laurent Liardet, Carlos Gilberto Morales Guio, Matthew Thomas Mayer

The splitting of water into hydrogen and oxygen molecules using sunlight is an attractive method for solar energy storage. Until now, photoelectrochemical hydrogen evolution is mostly studied in acidic solutions, in which the hydrogen evolution is more fac ...

Wiley-Blackwell2015

An Optically Transparent Iron Nickel Oxide Catalyst for Solar Water Splitting

Michael Graetzel, Xile Hu, Stanley David Tilley, Aswani Yella, Carlos Gilberto Morales Guio, Matthew Thomas Mayer

Sunlight-driven water splitting to produce hydrogen fuel is an attractive method for renewable energy conversion. Tandem photoelectrochemical water splitting devices utilize two photoabsorbers to harvest the sunlight and drive the water splitting reaction. ...

2015

Targeting Ideal Dual-Absorber Tandem Water Splitting Using Perovskite Photovoltaics and CuInxGa1-xSe2 Photocathodes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Marcel Roland Schreier, Stanley David Tilley, Yonghui Lee, Matthew Thomas Mayer, Jingshan Luo, Kunwu Fu

Efficient sunlight-driven water splitting devices can be achieved by pairing two absorbers of different optimized bandgaps in an optical tandem design. With tunable absorption ranges and cell voltages, organic-inorganic metal halide perovskite solar cells ...

Wiley-V C H Verlag Gmbh2015

Transparent Cuprous Oxide Photocathode Enabling a Stacked Tandem Cell for Unbiased Water Splitting

Michael Graetzel, Ulf Anders Hagfeldt, Marcel Roland Schreier, Stanley David Tilley, Matthew Thomas Mayer, Jingshan Luo, Dongqin Bi

Photoelectrochemical water splitting represents an attractive method of capturing and storing the immense energy of sunlight in the form of hydrogen, a clean chemical fuel. Given the large energetic demand of water electrolysis, and the defined spectrum of ...

Wiley-VCH Verlag Berlin2015

Solution Transformation of Cu2O into CuInS2 for Solar Water Splitting

Michael Graetzel, Marcel Roland Schreier, Stanley David Tilley, Ludmilla Steier, Matthew Thomas Mayer, Jingshan Luo

Though Cu2O has demonstrated high performance as a photocathode for solar water splitting, its band gap is too large for efficient use as the bottom cell in tandem configurations. Accordingly, copper chalcopyrites have recently attracted much attention for ...

American Chemical Society2015

Rate Law Analysis of Water Oxidation on a Hematite Surface

Michael Graetzel, Florian Le Formal, Stanley David Tilley

Water oxidation is a key chemical reaction, central to both biological photosynthesis and artificial solar fuel synthesis strategies. Despite recent progress on the structure of the natural catalytic site, and on inorganic catalyst function, determining th ...

American Chemical Society2015

Efficient and selective carbon dioxide reduction on low cost protected Cu2O photocathodes using a molecular catalyst

Michael Graetzel, Mohammad Khaja Nazeeruddin, Marcel Roland Schreier, Thomas Moehl, Stanley David Tilley, Peng Gao, Matthew Thomas Mayer, Jingshan Luo

Photoelectrochemical reduction of CO2 to CO was driven by a TiO2-protected Cu2O photocathode paired with a rhenium bipyridyl catalyst. Efficient and selective CO evolution was shown to be stable over several hours. The use of protic solution additives to o ...

Royal Soc Chemistry2015

Ultrafast Charge Carrier Recombination and Trapping in Hematite Photoanodes under Applied Bias

Michael Graetzel, Maurin Cornuz, Florian Le Formal, Stanley David Tilley, Xiaoyan Wang

Transient absorption spectroscopy on subpicosecond to second time scales is used to investigate photogenerated charge carrier recombination in Si-doped nanostructured hematite (alpha-Fe2O3) photoanodes as a function of applied bias. For unbiased hematite, ...

American Chemical Society2014

Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts

Michael Graetzel, Mohammad Khaja Nazeeruddin, Marcel Roland Schreier, Stanley David Tilley, Matthew Thomas Mayer, Jingshan Luo, Jeong-Hyeok Im

Although sunlight-driven water splitting is a promising route to sustainable hydrogen fuel production, widespread implementation is hampered by the expense of the necessary photovoltaic and photoelectrochemical apparatus. Here, we describe a highly efficie ...

American Association for the Advancement of Science2014

A Bismuth Vanadate-Cuprous Oxide Tandem Cell for Overall Solar Water Splitting

Michael Graetzel, Kevin Sivula, Pauline Bornoz, Stanley David Tilley

Through examination of the optoelectronic and photoelectrochemical properties of BiVO4 and Cu2O photoelectrodes, we evaluate the feasibility of a BiVO4/Cu2O photoanode/photocathode tandem cell for overall unassisted solar water splitting. Using state-of-th ...

American Chemical Society2014

Back Electron-Hole Recombination in Hematite Photoanodes for Water Splitting

Michael Graetzel, Maurin Cornuz, Florian Le Formal, Stanley David Tilley

The kinetic competition between electron-hole recombination and water oxidation is a key consideration for the development of efficient photoanodes for solar driven water splitting. In this study, we employed three complementary techniques, transient absor ...

American Chemical Society2014

Calculation of the Energy Band Diagram of a Photoelectrochemical Water Splitting Cell

Michael Graetzel, Matthias Schmid, Stanley David Tilley

A physical model is presented for the semiconductor electrode of a photoelectrochemical cell. The model accounts for the potential drop in the Helmholtz layer and thus enables description of both band edge pinning and unpinning. The model is based on the c ...

American Chemical Society2014

Understanding the Role of Underlayers and Overlayers in Thin Film Hematite Photoanodes

Michael Graetzel, Stanley David Tilley, Ludmilla Steier

Recent research on photoanodes for photoelectrochemical water splitting has introduced the concept of under-and overlayers for the activation of ultrathin hematite films. Their effects on the photocatalytic behavior were clearly shown; however, the mechani ...

Wiley-V C H Verlag Gmbh2014

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

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

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

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

Michael Graetzel, Xile Hu, Heron Vrubel, Stanley David Tilley, Carlos Gilberto Morales Guio

Concerns over climate change resulting from accumulation of anthropogenic carbon dioxide in the atmosphere and the uncertainty in the amount of recoverable fossil fuel reserves are driving forces for the development of renewable, carbon-neutral energy tech ...

Nature Publishing Group2014

Silicon protected with atomic layer deposited TiO2: conducting versus tunnelling through TiO2

Michael Graetzel, Stanley David Tilley

The present work demonstrates that tuning the donor density of protective TiO2 layers on a photocathode has dramatic consequences for electronic conduction through TiO2 with implications for the stabilization of oxidation-sensitive catalysts on the surface ...

Royal Society of Chemistry2013