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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Journal ArticleDOI
Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells
Konrad Domanski,Bart Roose,Taisuke Matsui,Michael Saliba,Silver-Hamill Turren-Cruz,Juan-Pablo Correa-Baena,Cristina Roldán Carmona,Giles Richardson,Jamie M. Foster,Filippo De Angelis,James M. Ball,Annamaria Petrozza,N. Mine,Mohammad Khaja Nazeeruddin,Wolfgang Tress,Michael Grätzel,Ullrich Steiner,Anders Hagfeldt,Antonio Abate,Antonio Abate +19 more
TL;DR: In this article, the authors demonstrate that ionic defects, migrating on timescales significantly longer (above 103 s) than what has so far been explored (from 10−1 to 102 s), abate the initial efficiency by 10−15% after several hours of operation at the maximum power point.
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Efficient Far Red Sensitization of Nanocrystalline TiO2 Films by an Unsymmetrical Squaraine Dye
Jun-Ho Yum,Pablo Walter,Simon Huber,Daniel Rentsch,Thomas Geiger,Frank Nüesch,Filippo De Angelis,Michael Grätzel,Mohammad Khaja Nazeeruddin +8 more
TL;DR: An asymmetric squaraine sensitizer comprising an anchoring group was engineered at the molecular level and synthesized and exhibited an unprecedented incident photon to current conversion efficiency of 85% under standard AM 1.5 sunlight.
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High efficiency solid-state photovoltaic device due to inhibition of interface charge recombination
TL;DR: In this paper, the performance of dye-sensitized solar cells based on spiro-MeOTAD was improved by controlling charge recombination across the interface of the heterojunction.
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Ultrahydrophobic 3D/2D fluoroarene bilayer-based water-resistant perovskite solar cells with efficiencies exceeding 22.
Yuhang Liu,Seckin Akin,Seckin Akin,Linfeng Pan,Ryusuke Uchida,Ryusuke Uchida,Neha Arora,Jovana V. Milić,Alexander Hinderhofer,Frank Schreiber,Alexander R. Uhl,Shaik M. Zakeeruddin,Anders Hagfeldt,M. Ibrahim Dar,Michael Grätzel +14 more
TL;DR: This new approach provides water- and heat-resistant operationally stable PSCs with a record-level PCE, and enhances interfacial hole extraction, suppressing nonradiative carrier recombination and enabling a power conversion efficiency (PCE) >22%, the highest reported for 3D/2D architectures.
Journal ArticleDOI
Visible light-induced water oxidation on mesoscopic α-Fe2O3 films made by ultrasonic spray pyrolysis
Alexis Duret,Michael Grätzel +1 more
TL;DR: In this article, the mesoscopic α-Fe2O3 layers produced by USP consist mainly of 100 nm-sized platelets with a thickness of 5−10 nm.