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GRMELA, L. TOMÁNEK, P. ŠKARVADA, P.
Original Title
Near-field study of hot spot photoluminescence decay in ZnS:Mn nanoparticles
Type
conference paper
Language
English
Original 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 (lambda =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. 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 (lambda =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.
Keywords
luminescence, hot center, ZnS:Mn, nanoparticle, optical near-field
Authors
GRMELA, L.; TOMÁNEK, P.; ŠKARVADA, P.
RIV year
2008
Released
7. 3. 2008
Publisher
ttp Trans Tech Publications
Location
Zurich, Switzerland
ISBN
978-0-87849-469-9
Book
Materials Structure and Micromechanics of Fracture V
Edition
567-568
Pages from
421
Pages to
424
Pages count
4
BibTex
@inproceedings{BUT25961, author="Lubomír {Grmela} and Pavel {Tománek} and Pavel {Škarvada}", title="Near-field study of hot spot photoluminescence decay in ZnS:Mn nanoparticles", booktitle="Materials Structure and Micromechanics of Fracture V", year="2008", series="567-568", pages="421--424", publisher="ttp Trans Tech Publications", address="Zurich, Switzerland", isbn="978-0-87849-469-9" }