Nature Communications (Jul 2021)
Six-photon upconverted excitation energy lock-in for ultraviolet-C enhancement
Abstract
Photon upconversion with near-infrared excitation and ultraviolet emission has many applications, but suffers from low quantum efficiency. Here, the authors report a six-photon upconversion process in nanoparticles with heterogeneous core-multishell structure, that regulate the energy transfer pathway.