Colloidal synthesis of lead-free Cs2TiBr6-xIx perovskite nanocrystals

Cesium titanium halide perovskites are novel lead-free optoelectronic materials that have attracted attention in the last two years for their application in solar cells with power conversion efficiencies reaching 3.3%. We report here the first colloidal synthesis of pure and mixed bromide-iodide cesium titanium perovskite nanocrystals with a bandgap tunable from 2.3 eV to 1.2 eV.

Automated summary

Cesium titanium halide perovskites are a novel type of lead-free optoelectronic material, with power conversion efficiencies in solar cells reaching 3.3%. This study reports the first successful colloidal synthesis of pure and mixed bromide-iodide cesium titanium perovskite nanocrystals, with tunable bandgaps from 2.3 eV to 1.2 eV.