Spontaneous crystallization of strongly confined CsSn_xPb_1-xI₃ perovskite colloidal quantum dots at room temperature.

ABSTRACT: The scalable and low-cost room temperature (RT) synthesis for pure-iodine all-inorganic perovskite colloidal quantum dots (QDs) is a challenge due to the phase transition induced by thermal unequilibrium. Here, we introduce a direct RT strongly confined spontaneous crystallization strategy in a Cs-deficient reaction system without polar solvents for synthesizing stable pure-iodine all-inorganic tin-lead (Sn-Pb) alloyed perovskite colloidal QDs, which exhibit bright yellow luminescence. By tuning the ratio of Cs/Pb precursors, the size confinement effect and optical band gap of the resultant CsSn_xPb_1-xI₃ perovskite QDs can be well controlled. This strongly confined RT approach is universal for wider bandgap bromine- and chlorine-based all-inorganic and iodin

SUBMITTER: Zhang L 

PROVIDER: S-EPMC10881968 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature