Journal
DALTON TRANSACTIONS
Volume 47, Issue 35, Pages 12414-12419Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt02434k
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Funding
- Russian Foundation for Basic Research Grant [16-33-00074 mol_a]
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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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