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

Abstract Here, silica‐coated CsPbBr 3 quantum dots (QDs) were demonstrated to be effective photosensitizers for the generation of singlet oxygen ( 1 O 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 1 O 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.