Related Experiment Video
Updated: Oct 14, 2025
A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
Published on: May 10, 2018
Clusters of Cesium-Lead-Iodide Perovskites in the Zeolite Matrix
Igor Dmitruk1, Yelyzaveta Vikhrova1, Andriy Dmytruk2
1Faculty of Physics, National Taras Shevchenko University of Kyiv, 64/13 Volodymyrska Street, Kyiv 01601, Ukraine.
Abstract:
Small clusters of cesium-lead-iodide perovskites (CLIPs) have been prepared in the Na-X zeolite matrix and studied by means of spectroscopy and quantum chemical modeling. Regularity of pores in single crystals of zeolite assures the formation of clusters of a certain size. By the first-principles quantum chemical calculations, we have determined that clusters Cs4PbI6, Cs5Pb2I9, and probably Cs7Pb5I16 with a size of 0.74, 1.29, and 1.36 nm, respectively, have elevated stability compared to other species, and they fit into the pores of Na-X zeolite. Electronic energy spectra of these clusters have been calculated and compared with experimentally measured ones.
Related Concept Videos
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...