Shell Phase and Morphology Control for Emission Tuning in III-V Core/Shell Quantum Dots.

ABSTRACT: Epitaxial growth of shells on III-V semiconductor quantum dot (QD) cores yields improved fluorescence quantum efficiency and stability toward their implementation in light emission technologies. Here, we control the shell morphology and crystal structure and investigate their effects on the emission properties of heterovalent III-V/II-VI core/shell QDs. This is achieved by tuning the ZnSe shell growth mode from kinetic to thermodynamic regimes via adjusting the precursor reactivity. When combined with high-temperature Ostwald ripening, this approach enables controlled tuning of shell morphology between tetrahedral and spherical-like, accompanied by a transformation of the shell crystal structure from zinc-blende to wurtzite. The position of the III-V cores within the III-V/ZnSe core/shell

SUBMITTER: Li X 

PROVIDER: S-EPMC12368997 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature