Effects of Tellurium Doping on Environmental Stability and Luminous Performance of CsPbBr₃ Quantum Dots.

ABSTRACT: The effects of elemental tellurium doping and decorating on the photoluminescence quantum yield (PL QY) and the environmental stability of the CsPbBr₃ quantum dots (QDs) have been systematically studied. The PL spectra blue-shifts from 520 to 464 nm gradually with the increase in the amount of Te, and the full width at half-maximum (FWHM) increases from 20 to 62 nm and decreases to 27 nm accordingly. The morphology of the untreated samples has a rectangular shape with distinct boundaries, whereas the Te-doped samples have a semi-core-shell structure with partially coated CsPb₂Br₅ after tellurium doping. Furthermore, the apparent size of the nanocomposites increases to 20 nm, but the crystal size of the core decreases slightly according to the broadened peak

SUBMITTER: Liang Z 

PROVIDER: S-EPMC9245131 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature