title: Room-Temperature Formation of Highly Crystalline Multication Perovskites for Efficient, Low-Cost Solar Cells.
abstract: A room-temperature perovskite material yielding a power conversion efficiency of 18.1% (stabilized at 17.7%) is demonstrated by judicious selection of cations. Both cesium and methylammonium are necessary for room-temperature formamidinium-based perovskite to obtain the photoactive crystalline perovskite phase and high-quality crystals. This room-temperature-made perovskite material shows great potential for low-cost, large-scale manufacturing such as roll-to-roll processing.
authors.affiliation: Advanced Research Division, Advanced Functional Materials Research Group, 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, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland.
authors.forename: Ji-Youn
authors.initials: JY
authors.lastname: Seo
authors.affiliation: Laboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Saliba
authors.affiliation: Laboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland.
authors.forename: Shaik M
authors.initials: SM
authors.lastname: Zakeeruddin
authors.affiliation: Laboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
keywords: perovskite solar cells; room temperature perovskites