Ultralong micro-belts of luminescent lead halide-based perovskites.

Ultralong micro-belts of MAPbI3 show bright and stable fluorescence in solution. Luminescent perovskites have been synthesized through centrifugation of a solution processed with a ligand-assisted reprecipitation technique (LARP). All electron spectroscopic analysis provided evidence for stacking of nanocrystals as bundles of self-assembled micro-belts. Under an applied bias, migration of free charge carriers through the long axis is feasible. Thus, long micro-belts are promising channel materials for two-electrode nanodevices for good electrical conductivity.