Year: 2025
Type: article
Abstract: InP/ZnSe core–shell quantum dots (QDs) can emit spectrally narrow light with high efficiency, but the relation between the QD properties and the composition of the core–shell interface remains unclear. Here, we compare 4 different batches of InP/ZnSe QDs, formed with or without intermediate purification and InP surface oxidation before shell growth. Elemental analysis and solid-state NMR show that the presence of InCl 3 during ZnSe shell growth leads to indium incorporation into the ZnSe shell, while interfacial oxidation creates a polyphosphate at the core/shell interface. The sample in which both interfacial engineering approaches were applied features a higher photoluminescence quantum yield and the slowest biexciton Auger recombination rate. These findings support emerging insights on the InP/ZnSe core/shell interface in the literature and pave the way for further improving the optoelectronic properties of these materials by adjusting the interfacial composition.
Source: Chemistry of Materials
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: Electrically Driven Quantum Dot Lasers, a Fundamental Nanomaterials/Nanophotonics Approach (E-QUAL), A Fundamental Study on Infrared Transitions in Quantum Dots - INTRIQATE, G6102179637, Luminescence Nanothermometry for the control and understanding of magneto-induced process. Application to biological hyperthermia and heterogeneous catalysis in solution, Continuous flow synthesis of InP-based quantum dots, Tracking Nanomaterial Performance, Towards Digital Twins of Quantum Dots Under Loading, G7373491337, Interface Control at the Nanoscale (ICON) – Synthesis, Interface Chemistry and Optical Spectroscopy of III-V/II-VI Heteronanostructures, Science et Ingénierie à l'Echelle Nano
OpenAlex ID: W4415617005