Effective Singlet Oxygen Generation in Silica-Coated CsPbBr3 Quantum Dots through Energy Transfer for Photocatalysis.

Here, silica-coated CsPbBr3 quantum dots (QDs) were demonstrated to be effective photosensitizers for the generation of singlet oxygen (1 O2 ). The silica encapsulation improved the stability of the perovskite QDs while also preserving an excellent light-harvesting capability in the visible-light region. The appropriate exciton binding energy and dark exciton generation characteristics of perovskite QDs may be responsible for the energy transfer. The high oxidizability of 1 O2 makes the material attractive for application in decomposition of organic dyes such as methyl orange. This work provides new insight for designing excellent perovskite-based photocatalysts.

Highly stable CsPbBr3@SiO2 nanocomposites prepared via confined condensation for use as a luminescent ink.

We have firstly prepared CsPbBr3@SiO2 nanocomposites with a spherical morphology and diameters less than 125 nm via confined condensation into polystyrene. The obtained CsPbBr3@SiO2 exhibits high stability in polar solvents and can be used as a solution-processable luminescent ink.