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 (O-1(2)). 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 O-1(2) 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.