Synthesis, structures, luminescent and color properties of polyethylmethacrylate (PEMA) polymers doped with rare earths

Thami Buhari, Demet Kaya Aktaş*, Murat Erdem, Gönül Eryürek

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Solid-state bulk polymer hosts doped with rare earths are expected to play a central role in the development of future light-emitting diodes and photonic devices due to the superior properties of polymers. In this study, linear polyethylmethacrylate (PEMA) and crosslinked PEMA gels doped with CdNb2O6: Er3+/Yb3+ nanocrystal powders were synthesized by free-radical crosslinking copolymerization. Er3+/Yb3+ ion structures embedded in PEMA polymers were investigated by the X-ray diffraction technique. The average crystalline particle sizes were found using the Pielazsek particle distribution and the Scherrer equation. The particle sizes decreased from 60 to 17 nm for CdNb2O6: Er3+/Yb3+ powders when they were embedded in PEMA polymers. Transmission electron microscopy and scanning electron microscopy monitored the change in the morphology of polymer samples doped with CdNb2O6: Er3+/Yb3+ powders. The optical properties of polymer samples were investigated by measuring luminescence spectra at room temperature. The doped Er3+/Yb3+ ion excited with a 975 nm diode laser achieved the up-conversion (UC) emissions by involving two-photon absorptions in the visible region. The UC intensities and absorbed photon numbers were increased by increasing crosslinker content. The effects of change in the structure and morphology of the host polymer material on the color tuning, color coordinates and color quality parameters were observed.

Original languageEnglish
Article number6
JournalJournal of Polymer Research
Volume31
Issue number1
DOIs
Publication statusPublished - Jan 2024

Bibliographical note

Publisher Copyright:
© 2023, The Polymer Society, Taipei.

Keywords

  • Color tunable
  • Host
  • Polyethylmethacrylate (PEMA) gels
  • Sensitizer-activator ions
  • Upconversion

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