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 v časopise ve Web of Science, Jimp

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 Mn2plus in ZnS. The excitation bandgap of ZnS forms exitons, and these excitons get the center of Mn2plus through nonradiation dominates, by means of transition of 4T1 to 6A1 luminescence. This spectrum is evidence that Mn2plus has been incorporated into the ZnS nanoparticles. In comparison with the bulk ZnSMn 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 ZnSMn.

Klíčová slova

ZnS:Mn nanoparticle, hot luminescent center, near-field optics, photoluminescence decay, measurement

Autoři

GRMELA, L.; TOMÁNEK, P.; ŠKARVADA, P.

Rok RIV

2007

Vydáno

6. 12. 2007

Nakladatel

TransTech Publication

Místo

Zurich Switzerland

ISSN

0255-5476

Periodikum

Materials Science Forum

Ročník

2007

Číslo

567

Stát

Švýcarská konfederace

Strany od

241

Strany do

244

Strany počet

4

BibTex

@article{BUT45105,
  author="Lubomír {Grmela} and Pavel {Tománek} and Pavel {Škarvada}",
  title="Near-field study of hot spot photoluminescence decay in ZnS:Mn nanoparticles",
  journal="Materials Science Forum",
  year="2007",
  volume="2007",
  number="567",
  pages="241--244",
  issn="0255-5476"
}