Spectroscopic investigation of the influence of Cu+ ions and plasmonic Cu particles on Ho3+ luminescence in phosphate glass

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Abstract

The luminescence of Ho3+ ions in phosphate glass containing a high concentration of Cu+ ions and also Cu nanoparticles (NPs) is reported. The glasses consisting of a barium-phosphate matrix were obtained by thermal processing and characterized by Fourier transform-infrared spectroscopy (FT-IR), optical absorption, and photoluminescence (PL) spectroscopy. The FT-IR data appeared consistent with a network modifier role of Cu+ ions with no significant structural alteration induced by NPs. The absorption spectrum for heat-treated Cu+/Ho3+ co-doped glass exhibited narrow plasmon resonance for Cu NPs around 575 nm. It was indicated that Cu+ PL dominates for excitation resonant with Cu+ absorption. Conversely, Ho3+ emission is clearly displayed for excitation in the visible (e.g. 450 nm) away from Cu+ excitation. Precipitating Cu NPs resulted in suppression of Cu+ band emission and the Ho3+ PL being quenched. Following the assessment of Ho3+ emission dynamics, likely energy transfer processes involving Cu NPs as energy acceptors were proposed.

Original languageEnglish (US)
Article number111045
JournalChemical Physics
Volume541
DOIs
StatePublished - Jan 15 2021

Keywords

  • Glasses
  • Holmium
  • Luminescence
  • Plasmonics

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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