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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 CH3NH3PbI3, focusing on the thermodynamic, environmental and polymorphic parameters that impact on 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∼ 54° C. Within this context, we discuss the conservative role of N2 and propose strategies for the emergence of industrially viable hybrid photovoltaics.
American Chemical Society
Publication date: 
15 May 2018

Ioannis Deretzis, Emanuele Smecca, Giovanni Mannino, Antonino La Magna, Tsutomu Miyasaka, Alessandra Alberti

Biblio References: 
The journal of physical chemistry letters