Towards non-blinking and photostable perovskite quantum dots.

Surface defect-induced photoluminescence blinking and photodarkening are ubiquitous in lead halide perovskite quantum dots. Despite efforts to stabilize the surface by chemically engineering ligand binding moieties, blinking accompanied by photodegradation still poses barriers to implementing perovskite quantum dots in quantum emitters. To date, ligand tail engineering in the solid state has rarely been explored for perovskite quantum dots.

Biexciton-like Auger Blinking in Strongly Confined CsPbBr Perovskite Quantum Dots.

Perovskite quantum dots (QDs) with high room-temperature luminescence efficiency have been applied in single-photon sources. While the optical properties of large, weakly confined perovskite nanocrystals have been extensively explored at the single-particle level, few studies have focused on single-perovskite QDs with strong quantum confinement. This is mainly due to their poor surface chemical stability.