Ligand regulated self-assembly and exciton dynamics in CsPbI3 nanocrystals

Abstract

A bis(thiobenzoyl) disulfide (BTDS) induced self-assembly strategy was developed to transform CsPbI3 nanocrystals into micrometerscale nanowires. By triggering oleylamine deprotonation and ligand desorption, BTDS drives one-dimensional regrowth, weakens quantum confinement, enhances exciton-phonon coupling, and uniformly accelerates first-order nonradiative recombination without introducing ultrafast trap-mediated channels, providing mechanistic guidance for perovskite nanocrystal assembly and exciton dynamics.