Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite |
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Authors: | Bert Conings Jeroen Drijkoningen Nicolas Gauquelin Aslihan Babayigit Jan D'Haen Lien D'Olieslaeger Anitha Ethirajan Jo Verbeeck Jean Manca Edoardo Mosconi Filippo De Angelis Hans‐Gerd Boyen |
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Institution: | 1. Institute for Materials Research, Hasselt University, Diepenbeek, Belgium;2. Electron Microscopy for Materials Research (EMAT), University of Antwerp, Antwerp, Belgium;3. X‐LaB, Hasselt University, Diepenbeek, Belgium;4. Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), CNR‐ISTM, Perugia, Italy |
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Abstract: | Organolead halide perovskites currently are the new front‐runners as light absorbers in hybrid solar cells, as they combine efficiencies passing already 20% with deposition temperatures below 100 °C and cheap solution‐based fabrication routes. Long‐term stability remains a major obstacle for application on an industrial scale. Here, it is demonstrated that significant decomposition effects already occur during annealing of a methylammonium lead triiode perovskite at 85 °C even in inert atmosphere thus violating international standards. The observed behavior supports the view of currently used perovskite materials as soft matter systems with low formation energies, thus representing a major bottleneck for their application, especially in countries with high average temperatures. This result can trigger a broader search for new perovskite families with improved thermal stability. |
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Keywords: | atomic force microscopy perovskite solar cells stability transmission electron microscopy X‐ray photoelectron spectroscopy |
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