Detail publikace

Near-field study of hot spot photoluminescence decay in ZnS:Mn nanoparticles

GRMELA, L. TOMÁNEK, P. ŠKARVADA, P.

Originální název

Near-field study of hot spot photoluminescence decay in ZnS:Mn nanoparticles

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

luminescence, hot center, ZnS:Mn, nanoparticle, optical near-field

Autoři

GRMELA, L.; TOMÁNEK, P.; ŠKARVADA, P.

Rok RIV

2008

Vydáno

7. 3. 2008

Nakladatel

ttp Trans Tech Publications

Místo

Zurich, Switzerland

ISBN

978-0-87849-469-9

Kniha

Materials Structure and Micromechanics of Fracture V

Edice

567-568

Strany od

421

Strany do

424

Strany počet

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"
}