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Optical properties and structure of Ag-doped InP quantum dots prepared by a phosphine synthetic route

Abstract : We report a novel technique for doping InP quantum dots (QDs) with silver that makes use of a AgCl TOP complex as a source of silver and PH3 as a phosphorus precursor. Formation of two types of nanoparticles in the reaction mixture is observed Ag-doped InP QDs form at lower silver concentrations and novel Ag/InP core-shell nanostructures form at high Ag-precursor concentrations. Ag-doped QDs possess two luminescent bands an excitonic band at approx. 670 nm and an IR-band, indicative of dopant luminescence, at approx. 900 nm. Post-synthetic covering of the quantum dots with ZnS leads to a significant increase in both types of luminescence. The core-shell Ag/InP nanoparticles did not emit any luminescence in the visible and near-IR spectral regions.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02174398
Contributor : Université Normandie <>
Submitted on : Friday, July 5, 2019 - 9:52:35 AM
Last modification on : Wednesday, September 4, 2019 - 5:36:03 PM

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Alexander Vinokurov, Galina Chernysheva, Natalia Mordvinova, Sergey Dorofeev. Optical properties and structure of Ag-doped InP quantum dots prepared by a phosphine synthetic route. Dalton Transactions, Royal Society of Chemistry, 2018, 47 (35), pp.12414-12419. ⟨10.1039/c8dt02434k⟩. ⟨hal-02174398⟩

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