Ultrastable monodispersed lead halide perovskite nanocrystals derived from interfacial compatibility

摘要

Lead halide perovskite nanocrystals (LHP-NCs) have attracted considerable attention due to exceptional optical properties, however, the practical applications are great limited by instability and hydrophobicity resulting from their ionic nature. Despite numerous strategies being developed for improving stabilities, exposure to water and polar solvents remains a huge challenge. Herein, an ultrastable LHP-NCs that can be monodispersed in polar solvents including (boiled) water was successfully fabricated. Over 20% photoluminescence (PL) emission intensity could be preserved with dispersing in water after 90 days that is a tremendous improvement to LHP-NCs. We demonstrate that interfacial compatibility plays an important role in the forming of compact protective shells. Moreover, due to ion exchange being inhibited and PL properties being able to dual-controlled, a wide color gamut could be facile achieved by mixing LHP-NCs that will great promotes their applications in various fields.