title: Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency.
abstract: Today's best perovskite solar cells use a mixture of formamidinium and methylammonium as the monovalent cations. With the addition of inorganic cesium, the resulting triple cation perovskite compositions are thermally more stable, contain less phase impurities and are less sensitive to processing conditions. This enables more reproducible device performances to reach a stabilized power output of 21.1% and ∼18% after 250 hours under operational conditions. These properties are key for the industrialization of perovskite photovoltaics.
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch; Group for Molecular Engineering of Functional Materials , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Sion CH-1951 , Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Saliba
authors.affiliation: Advanced Research Division , Materials Research Laboratory , Panasonic Corporation , 1006 Kadoma , Kadoma City , Osaka 571-8501 , Japan.
authors.forename: Taisuke
authors.initials: T
authors.lastname: Matsui
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch.
authors.forename: Ji-Youn
authors.initials: JY
authors.lastname: Seo
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch.
authors.forename: Konrad
authors.initials: K
authors.lastname: Domanski
authors.affiliation: Laboratory of Photomolecular Science (LSPM) École Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland.
authors.forename: Juan-Pablo
authors.initials: JP
authors.lastname: Correa-Baena
authors.affiliation: Group for Molecular Engineering of Functional Materials , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Sion CH-1951 , Switzerland.
authors.forename: Mohammad Khaja
authors.initials: MK
authors.lastname: Nazeeruddin
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch.
authors.forename: Shaik M
authors.initials: SM
authors.lastname: Zakeeruddin
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Tress
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch.
authors.forename: Antonio
authors.initials: A
authors.lastname: Abate
authors.affiliation: Laboratory of Photomolecular Science (LSPM) École Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland.
authors.forename: Anders
authors.initials: A
authors.lastname: Hagfeldt
authors.affiliation: Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , Lausanne CH-1015 , Switzerland . Email: michael.saliba@epfl.ch.
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel