Engineering Orthogonal Upconversion through Selective Excitation in a Single Nanoparticle (Adv. Funct. Mater. 18/2023)

Photon Upconversion In article number 2212037, Bo Zhou and co‐workers describe a conceptual design to realize the orthogonal upconversion through the selective excitation strategy. The switchable red/green, red/blue, and green/blue together with full‐color output are easily achieved at the single nanoparticle level, showing great potential in multi‐level anti‐counterfeiting, information security and biological applications.