Answers are grounded in this paper and cite their sources.
Changes in the nanostructure of methylammonium lead iodide (MAPbI₃) perovskite solar cells are assessed as a function of current-voltage stimulus by biasing thin samples in situ in a transmission electron microscope. Various degradation pathways are identified both in situ and ex situ, predominantly at the positively biased MAPbI₃ interface. Iodide migrates into the positively biased charge transport layer and also volatilizes along with organic species, which triggers the nucleation of PbI₂ nanoparticles and voids and hence decreases the cell performance.
No takes yet. Share an insight, caveat, or question.
Jeangros et al. (2016) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: