The role of sodium in stabilizing tin-lead (Sn-Pb) alloyed perovskite quantum dots.

ABSTRACT: Narrow-bandgap CsSn _x Pb_1-x I₃ perovskite quantum dots (QDs) show great promise for optoelectronic applications owing to their reduced use of toxic Pb, improved phase stability, and tunable band gaps in the visible and near-infrared range. The use of small ions has been proven beneficial in enhancing the stability and photoluminescence quantum yield (PLQY) of perovskite QDs. The introduction of sodium (Na) has succeeded in boosting the PLQY of CsSn_0.6Pb_0.4I₃ QDs. Unfortunately, the initial PLQY of the Na-doped QDs undergoes a fast degradation after one-day storage in solution, hindering their practical applications. Using density functional theory (DFT) calculations and ab initio molecular dynamics (AIMD

SUBMITTER: Jiang J 

PROVIDER: S-EPMC8148221 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature