Aniline was introduced into the synthesis of methylammonium lead bromide MAPbBr 3 (M-PE) as a capping ligand. With the appropriate steric hindrance, aniline effectively bound to the surface of M-PE particles and exposed hydrophobic phenyl groups, which were greatly beneficial for the enhancement of stability. M-PE and aniline-capped M-PE (AM-PE) were characterized by XRD, photoluminescence, UV/Vis spectroscopy, SEM and TEM. AM-PE showed more uniform morphology and much higher stability in polar solvents. AM-PE was almost unchanged in acetone within 100 hours while M-PE completely decomposed within 24 hours. Light harvesting in the visible region was also enhanced by aniline, so that AM-PE had much better performance for photodegradation of malachite green (MaG) than M-PE. In addition, the decomposition process of M-PE and AM-PE was also investigated in detail.
- perovskite phases
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Materials Chemistry