Enhanced visible and mid-IR emissions in Er/Yb-codoped K0.5Na0.5NbO3ferroelectric ceramics

Xiao Wu, Tat Hang Chung, Kin Wing Kwok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


Er3+/Yb3+-codoped K0.5Na0.5NbO3(KNN) ceramics have been fabricated by the solid state reaction method. Under the excitation of 980 nm, Er3+ions exhibit visible up-conversion emissions as well as the near-infrared (NIR) and middle-infrared (MIR) emissions. Yb3+ions are used as the sensitizer to codope with Er3+in the KNN host in the purpose of improving the emission efficiency and PL intensities, i.e. significantly enhancing the blue, green, red and MIR emissions of Er3+. The concentration quenching effect has been discussed together with the up-conversion emissions and corresponding luminescent lifetimes. The energy transfer processes between Er3+and Yb3+have been investigated with the relationship between the Yb3+concentration and PL intensities. Due to the moderate ferroelectric and piezoelectric properties of the host, the ceramics show multifunctional performance and potential in the application of optoelectronic areas.
Original languageEnglish
Pages (from-to)14041-14048
Number of pages8
JournalCeramics International
Issue number10
Publication statusPublished - 29 May 2015


  • Er-doped KNN ceramics
  • Ferroelectrics
  • Mid-IR emission
  • Up-conversion photoluminescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry


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