Jump to main content
Jump to site search

Issue 23, 2017, Issue in Progress
Previous Article Next Article

Synthesis of Y2O3:Bi3+,Eu3+ nanosheets from layered yttrium hydroxide precursor and their photoluminescence properties

Author affiliations

Abstract

We produced Y2O3:Bi3+,Eu3+ nanosheets by calcining layered yttrium hydroxide (LYH) precursor nanosheets at 800 °C for 2 h. The precursor nanosheets were synthesized from metallic chlorides dissolved in methanol, via a solvothermal reaction at 200 °C for 2.5 h. X-ray diffraction and transmission electron microscopy revealed that the LYH nanosheets were composed of crystallites with a uniform crystallographic orientation. Their sheet-like morphology and single-crystal nature remained after calcination, while the thickness of the nanosheets decreased. Their excitation spectrum was monitored at the 612 nm emission wavelength, corresponding to the 5D07F2 transition of Eu3+, and featured a broad band at 332 nm that was attributed to the 6s2 → 6s6p transition of Bi3+. The Y2O3:Bi3+,Eu3+ nanosheets therefore exhibited red emission from Eu3+ via energy transfer from Bi3+ to Eu3+ following near-UV excitation of Bi3+. The photoluminescence (PL) properties of the calcined samples were investigated with various concentrations of Bi3+ in Y2O3 nanosheets codoped with 2 at% Eu3+. The highest PL quantum yield was 23% at a Bi3+ concentration of 0.2 at%. The PL lifetimes of the calcined samples decreased with increasing Bi3+ concentration due to concentration quenching. The PL intensity increased over time under continuous excitation, which might be attributable to the photooxidation of Bi following its reduction by polyethyleneimine or methanol during the LYH synthesis.

Graphical abstract: Synthesis of Y2O3:Bi3+,Eu3+ nanosheets from layered yttrium hydroxide precursor and their photoluminescence properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 jan. 2017, accepted on 24 feb. 2017 and first published on 02 mar. 2017


Article type: Paper
DOI: 10.1039/C7RA01114H
RSC Adv., 2017,7, 14107-14113
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Synthesis of Y2O3:Bi3+,Eu3+ nanosheets from layered yttrium hydroxide precursor and their photoluminescence properties

    T. Watanabe, Y. Iso and T. Isobe, RSC Adv., 2017, 7, 14107
    DOI: 10.1039/C7RA01114H

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements