Ligand-Enhanced Neodymium Doping of Perovskite Quantum Dots for Superior Exciton Confinement.

ABSTRACT: In this study, all-inorganic perovskite quantum dots (QDs) for pure blue emission are explored for full-color displays. We prepared CsPbBr₃ and Cs₃NdCl₆ QDs via hot injection methods and mixed in various ratios at room temperature for color blending. Nd-doped CsPb(Cl/Br)₃ QDs showed a blueshift in emission, and the photoluminescence quantum yields (PLQY, Φ_PL) were lower in the 460-470 nm range due to surface halogen and Cs vacancies. To address this, we introduced a silane molecule, APTMS, via a ligand exchange process, effectively repairing these vacancies and enhancing Nd doping into the lattice. This modification promotes the PLQY to 94% at 466 nm. Furthermore, combining these QDs with [1]Benzothieno[3,2-b][1]benzothiophene (BTBT),

SUBMITTER: Wang X 

PROVIDER: S-EPMC10744661 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature