Printed Hybrid Upconversion/Perovskite Nanoparticle Cluster and Its Individual Photoluminescence Imaging

A versatile strategy to print hybrid upconversion/perovskite nanoparticle clusters based on nanoxerography has been developed. The individual hybrid cluster can be tuned by different upconversion nanoparticles (UCNPs), perovskite quantum dots (QDs), and their combinations to visualize multicolor. Based on the precise positioning of the array system, the structural and optical properties of each cluster in the array can be in situ and simultaneously characterized. This approach provides a straightforward and robust platform for high-throughput preparation and characterization of the hybrid clusters, and the ability to position functional nanoparticles at a desired area with nanoscale accuracy exhibits great potential in fabricating advanced nanodevices.