Near-infrared two-photon excited photoluminescence from Yb<sup>3+</sup>-doped CsPbCl<sub><i>x</i></sub>Br<sub>3−<i>x</i></sub> perovskite nanocrystals embedded into amphiphilic silica microspheres
D.A. Tatarinov, Ivan D. Skurlov, Anastasiia V. Sokolova, A. A. Shimko, Denis V. Danilov, Yuliya A. Timkina, Maxim A. Rider, Viktor Zakharov, Sergei A. Cherevkov, Natalya K. Kuzmenko, Aleksandra V. Koroleva, Evgeniy V. Zhizhin, Nadezhda A. Maslova, E. Yu. Stovpiaga, D. A. Kurdyukov, В. Г. Голубев, Xiaoyu Zhang, Weitao Zheng, Anton Tcypkin, Aleksandr P. Litvin, Andrey L. Rogach
Abstract
GM, and displayed dual-band emission located both in the visible (407-493 nm) and NIR (985 nm). With a view of practical applications of bio-visualisation in the NIR spectral range, these NCs were embedded into silica microspheres which were further wrapped with amphiphilic polymer shells to ensure their water-compatibility. The resulting microspheres with embedded NCs could be easily dispersed in both toluene and water, while still exhibiting a dual-band emission in visible and NIR under both one- and two-photon excitation conditions.