Equal Rights for Activators – Ytterbium to Terbium Cooperative Sensitization in Molecular Upconversion (Advanced Optical Materials 23/2024)

Understanding Molecular Upconversion In upconversion nanoparticles, the concentration of sensitizer ions is usually 9‐fold higher than the activator ion concentration. In upconversion molecules, equal amounts of sensitizers and activators lead to brightest upconversion emission. In their Research Article (article number 2400423), Marta Maria Natile, Niko Hildebrandt, and co‐workers apply advanced modeling to better understand the interaction of sensitizers and activators in nonanuclear lanthanide complexes.