Water infiltration in methylammonium lead iodide perovskite: fast and inconspicuous
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 pr...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
November 5, 2015
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| In: |
Chemistry of materials
Year: 2015, Volume: 27, Issue: 22, Pages: 7835-7841 |
| ISSN: | 1520-5002 |
| DOI: | 10.1021/acs.chemmater.5b03883 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1021/acs.chemmater.5b03883
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| Author Notes: | 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 |
| Summary: | 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. |
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| Item Description: | Gesehen am 20.07.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1520-5002 |
| DOI: | 10.1021/acs.chemmater.5b03883 |