Upconversion properties of Gd-based ceramics, attached into polystyrene films

A. Carro-Gastélum, S. Carmona-Téllez, S. Loera-Serna, L. Mariscal-Becerra, H. Murrieta S, G. Alarcón-Flores, C. Falcony

Research output: Contribution to journalArticlepeer-review

Abstract

Tm3+- and Yb3+-doped lithium-gadolinium oxide (Li-Gd2O3) ceramics, prepared by the simple evaporation technique, were incorporated into polystyrene (PS) films (as recycled Styrofoam). A study of the upconversion (UC) emission from Tm3+ as well as Yb3+ ions was performed under continuous wave excitation of a 980-nm laser, for both powder and PS film samples. High-intensity light emissions (UC) were observed at 476, 488, and 665 nm, associated with inter electronic energy state transitions of the Tm3+ ion, from 1D2 to 3F4, 1G4 to 3H6, and 3F3 to 3H6, respectively. Yb3+ presence makes possible the thulium blue emission in the UC luminescence because it acts as a sensitizer under 980-nm excitation. Lithium is used as part of the host lattice (Lix-Gd2-xO3; 0 ≤ x ≥ 1) in order to achieve a greater crystallinity as Li+ acts as fluxing agent. The PS films remain highly transparent in the light’s visible region even after the incorporation of the ceramic particles (around 80% T).

Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalJournal of the Australian Ceramic Society
Volume57
Issue number1
DOIs
StatePublished - Feb 2021

Keywords

  • (Li-Gd2O3) ceramics
  • Polystyrene films
  • Tm blue light emission
  • Upconversion properties

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