Browsing Zinātniskie raksti (CFI) / Scientific articles by Subject "Charge compensation"

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    • Niobium enhanced europium ion luminescence in hafnia nanocrystals 

      Laganovska, Katrina; Bite, Ivita; Zolotarjovs, Aleksejs; Smits, Krisjanis (Elsevier B.V., 2018)
      In this work we demonstrate a method where by adding Nb ions, Ln3+ ion luminescence intensity in HfO2 is increased for up to 15 times (in a sample containing 5 mol%Eu). The effect is described as niobium acting as a charge ...

    • Phase stability and oxygen-sensitive photoluminescence of ZrO2:Eu,Nb nanopowders 

      Kiisk, Valter; Puust, Laurits; Mändar, Hugo; Ritslaid, Peeter; Rähn, Mihkel; Bite, Ivita; Jankovica, Dzidra; Sildos, Ilmo; Jaaniso, Raivo (Elsevier B.V., 2018)
      We studied structure and oxygen-sensitive photoluminescence (PL) of ZrO2:Eu,Nb nanocrystalline powders synthesized via a sol-gel route and heat-treated up to 1200 °C. The material containing only 2 at% Eu3+ was predominantly ...