Numerical and experimental investigation of NIR-tovisible energy up-conversion in Er3+-doped sol-gel SiO2 powders

Ayodele Oladeji*, Polly L. Arnold, Mohammad I. Ali, Slawomir Sujecki, Andrew Phillips, Igor V. Sazanovich, Julia A. Weinstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Er-doped SiO2 powders were prepared by a simple and straightforward sol-gel method using tetraethoxysilane and erbium triflate as sources of SiO2 and Er2O3. Excitation with near-infrared 800 and 980 nm light initiated an energy up-conversion process in these materials, which resulted in the emission in the predominantly red and green parts of the spectrum. Laser power dependence of the intensity of the up-converted emission was studied both experimentally and by using a numerical model to understand the up-conversion mechanism. Excited state absorption (ESA) and five unique ion-ion energy transfer up-conversion (ETU) processes between the relevant levels are identified as possible mechanisms for the observed luminescence. The efficient NIR-visible upconversion was observed even at comparatively low powers of 200 mW cm-2.

Original languageEnglish
Pages (from-to)8075-8085
Number of pages11
JournalJournal of Materials Chemistry C Materials for optical and electronic devices
Volume1
Issue number48
Early online date21 Oct 2013
DOIs
Publication statusPublished - 28 Dec 2013

Keywords

  • WAVE-GUIDE LASER
  • RARE-EARTH IONS
  • GLASS-CERAMICS
  • LANTHANIDE LUMINESCENCE
  • SILICATE-GLASSES
  • YTTRIUM-OXIDE
  • RED EMISSION
  • GREEN
  • ERBIUM
  • ER3+

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