Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 9, Issue 11, Pages 3000-3007Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b00120
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Funding
- national project BEYOND NANO Upgrade [CUP G66J17000350007]
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Methylammonium lead iodide (CH3NH3PbI3) is an extensively used perovskite material with a remarkable potential for solar energy conversion. Despite its high photovoltaic efficiency, the material suffers from fast degradation when aging in atmospheric conditions and/or under sunlight. Here we review the principal degradation mechanisms of CH3NH3PbI, focusing on the thermodynamic, environmental and polymorphic parameters that impact the stability of the material. A critical analysis of the available data indicates that degradation under ambient conditions is a defect-generation process that is highly localized on surfaces and interfaces, while it is further enhanced above the tetragonal-cubic transition at similar to 54 degrees C. Within this context, we discuss the conservative role of N-2 and propose strategies for the emergence of industrially viable hybrid photovoltaics.
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