Keywords
additive
MAPbI3
perovskite films
perovskite solar cells
pyridine-based ligand
stability
thin films
Abstract
The effect of pyridine-based ligands, capable of coordinating e improving stability with Pb2+ defect sites through nitrogen atoms, on the photostability of MAPbI3 thin films under solar radiation of 70–80mWcm−2 at 50–60°C in an inert atmosphere has been investigated using UV-VIS spectroscopy, X-ray diffraction analysis and atomic force microscopy. It has been found that the addition of 4,4′-bipyridine to the perovskite precursor improves the photostability of a MAPbI3 thin film, withstanding illumination for 1400h.
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