Energy structure and fluorescence of in ZnS:Eu nanoparticles

Wei Chen, Jan Olle Malm

Research output: Contribution to journalArticlepeer-review

223 Citations (Scopus)

Abstract

(Formula presented)-doped ZnS nanoparticles with an average size of around 3 nm were prepared, and an emission band around 530 nm was observed. By heating in air at 150 °C, this emission decreased, while the typical sharp line emission of (Formula presented) increased. This suggests that the emission around 530 nm is from intraion transition of (Formula presented) In bulk (Formula presented) no intraion transition of (Formula presented) was observed because the excited states of (Formula presented) are degenerate with the continuum of the ZnS conduction band. We show that the band gap in (Formula presented) nanoparticles opens up due to quantum confinement, such that the conduction band of ZnS is higher than the first excited state of (Formula presented) thus enabling the intraion transition of (Formula presented) to occur.

Original languageEnglish
Pages (from-to)11021-11024
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number16
DOIs
Publication statusPublished - 2000
Externally publishedYes

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