Time-resolved luminescence of ZnS:Mn2+ nanocrystals

C. De Mello Donegá, A.A. Bol, A. Meijerink

Research output: Contribution to journalArticleAcademicpeer-review

40 Citations (Scopus)

Abstract

Recently, Yu and co-workers reported the observation of hot luminescence for Mn2+ in 3.6 nm ZnS nanocrystals, implying that the phonon relaxation rates in nanocrystals were ∼106 times lower than that in bulk materials. In order to verify this unexpected observation, we investigated the time-resolved spectroscopy of 4.5 nm ZnS:Mn2+ nanocrystals. Samples with two different Mn2+ concentrations were studied. In contradiction with the results reported by Yu and co-workers, no evidence of Mn2+ hot luminescence was found, regardless of the Mn2+ concentration, temperature (4.2-300 K), time delay (0.1-1000 μs), gate width (2-3000 μs), or excitation density (40-700 mJ/cm2).

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalJournal of Luminescence
Volume96
Issue number2-4
DOIs
Publication statusPublished - 1 Mar 2002
Externally publishedYes

Keywords

  • Hot luminescence
  • Nanocrystals
  • Time-resolved luminescence
  • ZnS:Mn photoluminescence

Fingerprint Dive into the research topics of 'Time-resolved luminescence of ZnS:Mn2+ nanocrystals'. Together they form a unique fingerprint.

Cite this