Dark bridge at the interface of hybrid nanosystem: Lanthanide-triplet NIR photosensitization

“Dark” organic triplet states typically require visible light to activate via singlet-triplet intersystem crossing. In this issue of Chem, Deng and co-workers report a new near-infrared photosensitization strategy using lanthanide-doped nanoparticles to directly activate the dark triplet states of organic photosensitizers, significantly reducing the power requirement of irradiance.