Phosphorus Oxidation Controls Epitaxial Shell Growth in InP/ZnSe Quantum Dots.

ABSTRACT: InP/ZnSe/ZnS core/shell/shell quantum dots are the most investigated quantum dot material for commercial applications involving visible light emission. The inner InP/ZnSe interface is complex since it is not charge balanced, and the InP surface is prone to oxidation. The role of oxidative defects at this interface has remained a topic of debate, with conflicting reports of both detrimental and beneficial effects on the quantum dot properties. In this study we probe the structure of the InP/ZnSe interface at the atomic level using ³¹P, ⁷⁷Se and ¹⁷O ssNMR and HAADF-STEM. We observe clear differences in Se NMR spectra and crystal orientation of core and shell when the InP/ZnSe is oxidized on purpose. High levels of interface oxidation result in an amorphous ph

SUBMITTER: Ubbink RF 

PROVIDER: S-EPMC11752496 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature