<p>Metal halide perovskite (MHP) materials are under
extensive examination for various high performance optoelectronic applications,
but their photosensitizing utilization for singlet oxygen generation has not
been explored. Based on the observed characteristic NIR phosphorescence of
singlet oxygen and the photosensitized decomposition of a specific singlet
oxygen chemical trapper (diphenylisobenzofuran), we show herby that MAPbBr<sub>3</sub>
quantum dots can significantly generate singlet oxygen with the quantum yield
up to 0.34, which is the highest among nano semiconductor
and nano metal material types of singlet oxygen photosensitizers. Further more,
MAPbBr<sub>3</sub> quantum dots show good stability towards singlet oxygen. The
mechanism of MHP as a singlet oxygen photosensitizer is also suggested to be
due to triplet excitons. This finding expands new applications of MHPs in PDT, antiviral
and antibacterial treatments, and pharmaceutical industry.</p>
Engineering Molecular Ligand Shells on Quantum Dots for Quantitative Harvesting of Triplet Excitons Generated by Singlet Fission
