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Marcel Roland Schreier

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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

Molecular Engineering of Potent Sensitizers for Very Efficient Light Harvesting in Thin-Film Solid-State Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Chenyi Yi, Fabrizio Giordano, Norman Pellet, Marcel Roland Schreier, Yelin Hu, Xiaoyu Zhang, Yi Xu

Dye-sensitized solar cells (DSSCs) have shown significant potential for indoor arid building integrated photovoltaic applications. Herein we present three new D-A-pi-A organic sensitizers, XY1, XY2, and XY3, that exhibit high molar extinction coefficients ...

Amer Chemical Soc2016

Efficient photosynthesis of carbon monoxide from CO2 using perovskite photovoltaics

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jingshan Luo, Antonio Abate, Fabrizio Giordano, Matthew Thomas Mayer, Marcel Roland Schreier, Ludmilla Steier

Artificial photosynthesis, mimicking nature in its efforts to store solar energy, has received considerable attention from the research community. Most of these attempts target the production of H-2 as a fuel and our group recently demonstrated solar-to-hy ...

Nature Publishing Group2015

Low-Temperature Atomic Layer Deposition of Crystalline and Photoactive Ultrathin Hematite Films for Solar Water Splitting

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

We developed a low-temperature atomic layer deposition route to deposit phase pure and crystalline hematite (alpha-Fe2O3) films at 230 degrees C without the need for postannealing. Homogenous and conformal deposition with good aspect ratio coverage was dem ...

American Chemical Society2015

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

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

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

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

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

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

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

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

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

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

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Efficient photosynthesis of carbon monoxide from CO2 using perovskite photovoltaics

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jingshan Luo, Antonio Abate, Fabrizio Giordano, Matthew Thomas Mayer, Marcel Roland Schreier, Ludmilla Steier

Nature Publishing Group2015

Low-Temperature Atomic Layer Deposition of Crystalline and Photoactive Ultrathin Hematite Films for Solar Water Splitting

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

American Chemical Society2015

Molecular Engineering of Potent Sensitizers for Very Efficient Light Harvesting in Thin-Film Solid-State Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Chenyi Yi, Fabrizio Giordano, Norman Pellet, Marcel Roland Schreier, Yelin Hu, Xiaoyu Zhang, Yi Xu

Amer Chemical Soc2016

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

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

Royal Soc Chemistry2015