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
Effect of Hydrocarbon Chain Length of Amphiphilic Ruthenium Dyes on Solid-State Dye-Sensitized Photovoltaics
Lukas Schmidt-Mende,Jessica E. Kroeze,James R. Durrant,Mohammad Khaja Nazeeruddin,Michael Grätzel +4 more
TL;DR: It is found that the dyes with longer hydrocarbon chains gave higher efficiency values when used as a sensitizer in solid-state dye-sensitized solar cells with increasing chain length, with higher currents and open-circuit voltages up to a limiting chain length.
Journal ArticleDOI
Molecular Engineering of a Fluorene Donor for Dye-Sensitized Solar Cells
Aswani Yella,Robin Humphry-Baker,Basile F. E. Curchod,Negar Ashari Astani,Joël Teuscher,Lauren E. Polander,Simon Mathew,Jacques-E. Moser,Ivano Tavernelli,Ursula Rothlisberger,Michael Grätzel,Md. K. Nazeeruddin,Julien Frey +12 more
TL;DR: In this paper, the electronic and steric properties of a fluorene donor are engineered to meet all the requirements of D-pi-A. sensitized solar cells, including the ability to control the electron-transfer processes that ensure efficient dye-regeneration and prevent undesired electron recombination.
Journal ArticleDOI
Direct monitoring of ultrafast electron and hole dynamics in perovskite solar cells
Piotr Piatkowski,Boiko Cohen,Francisco Javier Ramos,Maria Rosaria di Nunzio,Mohammad Khaja Nazeeruddin,Michael Grätzel,Shahzada Ahmad,Abderrazzak Douhal +7 more
TL;DR: The contribution of the former in the recombination is small, thus increasing the survival probability of the charges in the excited perovskite, and the power-dependent femtosecond transient absorption measurements support the ultrafast charge transfer and show strong Auger-type multiparticle interactions at early times.
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Enhanced Charge Collection with Passivation Layers in Perovskite Solar Cells.
Yong Hui Lee,Jingshan Luo,Min Kyu Son,Peng Gao,Kyung Taek Cho,Ji-Youn Seo,Shaik M. Zakeeruddin,Michael Grätzel,Mohammad Khaja Nazeeruddin +8 more
TL;DR: The Al2 O3 passivation layer is beneficial for mesoporousTiO2 -based perovskite solar cells when it is deposited selectively on the compact TiO2 surface.
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Mechanosynthesis of the hybrid perovskite CH3NH3PbI3: characterization and the corresponding solar cell efficiency
Daniel Prochowicz,Marius Franckevičius,A. M. Cieślak,Shaik M. Zakeeruddin,Michael Grätzel,Janusz Lewiński,Janusz Lewiński +6 more
TL;DR: In this article, a facile mechanochemical route for the preparation of hybrid CH3NH3PbI3 perovskite particles with the size of several hundred nanometers for high-efficiency thin-film photovoltaic devices was presented.