M
Michael Grätzel
Researcher at École Polytechnique Fédérale de Lausanne
Publications - 1476
Citations - 335642
Michael Grätzel is an academic researcher from École Polytechnique Fédérale de Lausanne. The author has contributed to research in topics: Dye-sensitized solar cell & Perovskite (structure). The author has an hindex of 248, co-authored 1423 publications receiving 303599 citations. Previous affiliations of Michael Grätzel include University of California, Berkeley & Siemens Energy Sector.
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Surfactant-Templated TiO2 (Anatase): Characteristic Features of Lithium Insertion Electrochemistry in Organized Nanostructures
TL;DR: In this paper, thin layer electrodes (0.2−0.5 μm) of highly organized nanotextured anatase were prepared by hydrolysis of TiCl4 in the presence of poly(alkylene oxide) block copolymer, Pluronic P-123, acting as the structure-directing agent.
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A Smooth CH3NH3PbI3 Film via a New Approach for Forming the PbI2 Nanostructure Together with Strategically High CH3NH3I Concentration for High Efficient Planar-Heterojunction Solar Cells
Hong Zhang,Jian Mao,Hexiang He,Di Zhang,Hugh L. Zhu,Fengxian Xie,Kam Sing Wong,Michael Grätzel,Wallace C. H. Choy +8 more
TL;DR: In this paper, a new approach is demonstrated for forming the PbI2 nanostructure and the use of high CH3NH3I concentration which are adopted to form high-quality (smooth and pbII2 residue-free) perovskite film with better photovoltaic performances.
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Ultrafast Charge Carrier Recombination and Trapping in Hematite Photoanodes under Applied Bias
Stephanie R. Pendlebury,Xiuli Wang,Florian Le Formal,Maurin Cornuz,Andreas Kafizas,S. David Tilley,Michael Grätzel,James R. Durrant +7 more
TL;DR: Transient absorption spectroscopy on subpicosecond to second time scales is used to investigate photogenerated charge carrier recombination in Si-doped nanostructured hematite (α-Fe2O3) photoanodes as a function of applied bias.
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A Light-Resistant Organic Sensitizer for Solar-Cell Applications
Jun-Ho Yum,Daniel P. Hagberg,Soo-Jin Moon,Karl Martin Karlsson,Tannia Marinado,Licheng Sun,Anders Hagfeldt,Mohammad Khaja Nazeeruddin,Michael Grätzel +8 more
TL;DR: A stable dye-sensitized solar cell that contains a molecularly engineered organic dye has been prepared that remains at 90% after 1000 h of light soaking at 60 degrees C and shows barely no decline in the opencircuit voltage value, short-circuit photocurrent-density value, and the fill factor.
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The Nature of Ion Conduction in Methylammonium Lead Iodide: A Multimethod Approach
Alessandro Senocrate,Igor L. Moudrakovski,Gee Yeong Kim,Tae-Youl Yang,Giuliano Gregori,Michael Grätzel,Michael Grätzel,Joachim Maier +7 more
TL;DR: Iodine ions are unambiguously shown to be the mobile species in CH3NH3PbI3, with iodine vacancies shown to represent the mechanistic centers under equilibrium conditions, and local variations of the iodine stoichiometry may be fast and enable light effects on ion transport.