Publication detail

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

GRMELA, L. TOMÁNEK, P. ŠKARVADA, P.

Original Title

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

Type

journal article in Web of Science

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 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.

Keywords

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

Authors

GRMELA, L.; TOMÁNEK, P.; ŠKARVADA, P.

RIV year

2007

Released

6. 12. 2007

Publisher

TransTech Publication

Location

Zurich Switzerland

ISBN

0255-5476

Periodical

Materials Science Forum

Year of study

2007

Number

567

State

Swiss Confederation

Pages from

241

Pages to

244

Pages count

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"
}