title: High-Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on Amphiphile-Modified CH3 NH3 PbI3.
abstract: A new aliphatic fluorinated amphiphilic additive is added to CH3 NH3 PbI3 perovskite to tune the morphology and enhance the environmental stability without sacrificing the performance of the devices. Judicious screening of the perovskite precursor solution realizes a power conversion efficiency of 18.0% for mesoporous perovskite solar cells as a result of improved surface coverage. A slower degradation in ambient air is observed with this modified perovskite.
authors.affiliation: Laboratory of Photomolecular Science, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
authors.forename: Dongqin
authors.initials: D
authors.lastname: Bi
authors.affiliation: Group for Molecular Engineering of Functional Materials, EPFL Valais Wallis, Rue de l'industrie 17, CH-1951, Sion, Switzerland.
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.affiliation: Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
authors.forename: Rosario
authors.initials: R
authors.lastname: Scopelliti
authors.affiliation: Interdisciplinary Centre for Electron Microscopy, Ecole Polytechnique Fédérale de Lausanne, Station 12,, CH-1015, Lausanne, Switzerland.
authors.forename: Emad
authors.initials: E
authors.lastname: Oveisi
authors.affiliation: Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
authors.forename: Jingshan
authors.initials: J
authors.lastname: Luo
authors.affiliation: Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
authors.affiliation: Laboratory of Photomolecular Science, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
authors.forename: Anders
authors.initials: A
authors.lastname: Hagfeldt
authors.affiliation: Group for Molecular Engineering of Functional Materials, EPFL Valais Wallis, Rue de l'industrie 17, CH-1951, Sion, Switzerland.
authors.forename: Mohammad Khaja
authors.initials: MK
authors.lastname: Nazeeruddin
keywords: amphiphilic additives; perovskite phases; perovskite solar cells; stability<