Karl Franzens University Graz | Graz University of Technology | |
Halide Perovskite Nanocrystals: From Platelets to Supercrystals The optical properties of metal halide perovskite nano-platelets with controllable thickness down to one monolayer will be discussed. Pronounced quantum confinement effects, large excitonic binding energies and comparably high radiative recombination rates have been found, all depending on the number of monolayers present in the respective nano-platelets. Ultrafast optical experiments provide further insight into characteristic charge carrier and spin relaxation scenarios in colloidal perovskite nanocrystals. Finally, the assembly of halide perovskite nanocrystals into ordered supercrystals leads to remarkable changes of their linear and nonlinear optical properties. |