Research data supporting the publication "Enhanced spin lifetime in colloidal quantum dots by growth from singly Mn-doped molecular cluster seeds"

Doped colloidal quantum dots (CQDs) are promising spin-photon interfaces, combining excellent optical properties and a substrate-free, nano-positionable platform. Here, we report the synthesis of InP/ZnSeS core-shell CQDs from zinc sulphide based seed clusters containing single Mn(II) ions. The resulting doped CQDs demonstrate photoluminescence quantum yields up to 70%, a spin-lattice lifetime of 22 ms and a spin coherence lifetime of 2.7 μs, greater than and similar to the best yet reported for Mn-doped CQD systems, respectively. These spin lifetimes were achieved despite the high nuclear spin of InP, demonstrating the effectiveness of the ZnS cluster in shielding the Mn from its environment.