Water infiltration in methylammonium lead iodide perovskite

• Verfasst von: Müller, Christian [VerfasserIn]
• Verfasst von: Glaser, Tobias [VerfasserIn]
• Verfasst von: Plogmeyer, Marcel [VerfasserIn]
• Verfasst von: Sendner, Michael [VerfasserIn]
• Verfasst von: Kowalsky, Wolfgang [VerfasserIn]
• Verfasst von: Pucci, Annemarie [VerfasserIn]
• Verfasst von: Lovrinčić, Robert [VerfasserIn]
• Titel: Water infiltration in methylammonium lead iodide perovskite
• Titelzusatz: fast and inconspicuous
• Verf.angabe: Christian Müller, Tobias Glaser, Marcel Plogmeyer, Michael Sendner, Sebastian Döring, Artem A. Bakulin, Carlo Brzuska, Roland Scheer, Maxim S. Pshenichnikov, Wolfgang Kowalsky, Annemarie Pucci, and Robert Lovrinčić
• E-Jahr: 2015
• Jahr: November 5, 2015
• Umfang: 7 S.
• Fussnoten: Gesehen am 20.07.2020
• Titel Quelle: Enthalten in: Chemistry of materials
• Ort Quelle: Washington, DC : American Chemical Society, 1989
• Jahr Quelle: 2015
• Band/Heft Quelle: 27(2015), 22, Seite 7835-7841
• ISSN Quelle: 1520-5002
• DOI: doi:10.1021/acs.chemmater.5b03883
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1725171686

Abstract

While the susceptibility of CH3NH3PbI3 to water is well-documented, the influence of water on device performance is not well-understood. Herein, we use infrared spectroscopy to show that water infiltration into CH3NH3PbI3 occurs much faster and at a humidity much lower than previously thought. We propose a molecular model in which water molecules have a strong effect on the hydrogen bonding between the methylammonium cations and the Pb-I cage. Furthermore, the exposure of CH3NH3PbI3 to the ambient environment increases the photocurrent of films in lateral devices by more than 1 order of magnitude. The observed slow component in the photocurrent buildup indicates that the effect is associated with enhanced proton conduction when light is combined with water and oxygen exposure.