Enhanced spin lifetime in colloidal quantum dots by growth from singly Mn-doped molecular cluster seeds

Julian Schneider; Chris Page; James Harris; Nigel L. Pickett; Nathalie C. Gresty; Christopher  Waby; Charles Biddlecombe; Rachel Barrett; Adam Brookfield; Patrick Parkinson; Floriana Tuna; Simon M. Fairclough; David Binks

doi:10.1039/D4NR04558K

Enhanced spin lifetime in colloidal quantum dots by growth from singly Mn-doped molecular cluster seeds

Julian Schneider, Chris Page, James Harris, Nigel L. Pickett, Nathalie C. Gresty, Christopher Waby, Charles Biddlecombe, Rachel Barrett, Adam Brookfield, Patrick Parkinson, Floriana Tuna, Simon M. Fairclough, David Binks

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Journal	Nanoscale
DOIs	https://doi.org/10.1039/D4NR04558K
Publication status	Published - 7 Mar 2025

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title = "Enhanced spin lifetime in colloidal quantum dots by growth from singly Mn-doped molecular cluster seeds",

abstract = "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. ",

author = "Julian Schneider and Chris Page and James Harris and Pickett, {Nigel L.} and Gresty, {Nathalie C.} and Christopher Waby and Charles Biddlecombe and Rachel Barrett and Adam Brookfield and Patrick Parkinson and Floriana Tuna and Fairclough, {Simon M.} and David Binks",

year = "2025",

month = mar,

day = "7",

doi = "10.1039/D4NR04558K",

language = "English",

journal = "Nanoscale",

issn = "2040-3372",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Enhanced spin lifetime in colloidal quantum dots by growth from singly Mn-doped molecular cluster seeds

AU - Schneider, Julian

AU - Page, Chris

AU - Harris, James

AU - Pickett, Nigel L.

AU - Gresty, Nathalie C.

AU - Waby, Christopher

AU - Biddlecombe, Charles

AU - Barrett, Rachel

AU - Brookfield, Adam

AU - Parkinson, Patrick

AU - Tuna, Floriana

AU - Fairclough, Simon M.

AU - Binks, David

PY - 2025/3/7

Y1 - 2025/3/7

N2 - 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.

AB - 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.

U2 - 10.1039/D4NR04558K

DO - 10.1039/D4NR04558K

M3 - Article

SN - 2040-3372

JO - Nanoscale

JF - Nanoscale

ER -

Enhanced spin lifetime in colloidal quantum dots by growth from singly Mn-doped molecular cluster seeds

Abstract

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