On the Colloidal Stability of PbS Quantum Dots Capped with Methylammonium Lead Iodide Ligands.

ABSTRACT: Phase-transfer exchange of pristine organic ligands for inorganic ones is essential for the integration of colloidal quantum dots (CQDs) in optoelectronic devices. This method results in a colloidal dispersion (ink) which can be directly deposited by various solution-processable techniques to fabricate conductive films. For PbS CQDs capped with methylammonium lead iodide ligands (MAPbI₃), the most commonly employed solvent is butylamine, which enables only a short-term (hours) colloidal stability and thus brings concerns on the possibility of manufacturing CQD devices on a large scale in a reproducible manner. In this work, we studied the stability of alternative inks in two highly polar solvents which impart long-term colloidal stability of CQDs: propylene carbonate (PC) and 2,

SUBMITTER: Bederak D 

PROVIDER: S-EPMC7705889 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature