Near-Field Study of Hot Spot Photoluminescence Decay in ZnS:Mn Nanoparticles

Lubomír Grmela; Pavel Tománek; Pavel Škarvada

doi:10.4028/www.scientific.net/MSF.567-568.241

Paper Titles

Estimation of the Crack Propagation Direction of a Crack Touching the Interface between Two Elastic Materials
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The Influence of Thermally Sprayed Coatings Microstructure on their Mechanical and Tribological Characteristics
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Effect of Anodic Surface Treatment on PAN-Based Carbon Fiber and its Relationship to the Fracture Toughness of the Carbon Fiber-Reinforced Polymer Composites
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X-Ray Diffraction Analysis of Oxide Layers of Zr-Based Alloys
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Near-Field Study of Hot Spot Photoluminescence Decay in ZnS:Mn Nanoparticles
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Effect of Nickel Purity on Self-Diffusion along High-Diffusivity Paths
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Influence of Interfaces upon the Self-Diffusion in AZ91 Alloy Reinforced by Saffil Short Fibres
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Surface Structure and Cells Adhesion on Doped Polyethylene
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F₂-Laser Angle Nanomodification of PET
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Near-Field Study of Hot Spot Photoluminescence Decay in ZnS:Mn Nanoparticles

Abstract:

The local spatial distribution of photoluminescence due to the creation of hot luminescence centers was measured in the optical near-field by Scanning near-field optical microscope at emission peaks of materials (λ =595nm), which is due to the luminescence of Mn2+ in ZnS. The excitation bandgap of ZnS forms exitons, and these excitons get the center of Mn2+ through nonradiation dominates, by means of transition of 4T1 – 6A1 luminescence. This spectrum is evidence that Mn2+ has been incorporated into the ZnS nanoparticles. In comparison with the bulk ZnS:Mn phosphors these nanoparticles have clearly higher luminescent efficiency with its luminescent decay time at least 4 orders of magnitude slower. It means that the oscillator intensity of luminescent centers in ZnS:Mn nanocrystal enhances at least 4 orders of magnitude than that in corresponding bulk ZnS:Mn.