Up‐conversion luminescence of ytterbium and thulium codoped potassium yttrium double tungstate crystal

Abstract

Up-conversion luminescence of ytterbium and thulium codoped potassium yttrium double tungstate crystalThulium and ytterbium co-doped double tungstate Yb 3+ ,Tm 3+ : NaY(WO 4 ) 2 single crystals were prepared by using RF-heating Czochralski (CZ) pulling method. Its polarized transmittance spectra have been recorded in the region of 290-2000nm at room temperature. The energy levels transitions were assigned to the corresponding absorption line. The up-conversion luminescences at 793nm and 475nm w ere measured when the sample were pumped by 972nm LD and the energy transfer mechanism between Yb 3+ and Tm 3+ ions was analyzed.

Self-Assembled 3D Urchin-Like NaY(MoO4)2:Eu3+/Tb3+ Microarchitectures: Hydrothermal Synthesis and Tunable Emission Colors

“…Among them, double alkaline rare earth molybdates with the general formula of NaY(MoO 4 ) 2 form a wide variety of inorganic compounds having tetragonal and monoclinic symmetries that have attracted great interest in recent years . Nevertheless, previous work about the NaY(MoO 4 ) 2 family compounds was reported mostly on the single crystals to be used as laser crystal materials for a long period of time . Recently, stimulated by both the promising applications and the interesting properties, much attention has been directed to the controlled synthesis of rare earth molybdates with different shapes and the investigation of their size/shape-dependent properties in the past several years .…”

Surfactant-Assisted Hydrothermal Synthesis of Eu3+-Doped White Light Hydroxyl Sodium Yttrium Tungstate Microspheres and Their Conversion to NaY(WO4)2

“…Double alkaline rare-earth molybdates and tungstates with the formula of ARE(MO 4 ) 2 (A = Na, K, RE = Y, La, Gd, Lu, and M = Mo, W) form a wide variety of inorganic compounds having tetragonal and monoclinic symmetries that have attracted great interest in recent years. − Their structure diversity provides these crystals with numerous physical and chemical properties for the possibility of doping with rare earth ions without substantial fluorescence quenching, in addition to the well-known laser hosts. The ARE(MO 4 ) 2 family compounds were reported mostly on the single crystals to be used as laser crystal materials for a long period of time. − Tungstate with a sheelite-type structure has been of practical interest because of its attractive luminescence property with the promising applications in photoluminescence (PL), optical fibers, and scintillators . As one compound of the family, NaY(WO 4 ) 2 has a tetragonal symmetry with the structure of scheelite CaWO 4 (W 6+ is coordinated by four oxygen atoms in a tetrahedral site and Y 3+ /Na + site is eight coordinated).…”

Multifunctional luminescent nanomaterials from NaLa(MoO4)2:Eu3+/Tb3+ with tunable decay lifetimes, emission colors and enhanced cell viability

“…Lanthanide molybdates, a typical class of double molybdates, have attracted a great deal of attention recently due to their technological potentials for multifunctional applications, such as ferroelectricity and ferroelasticity, ionic conducting of oxygen, lasing, and phosphors luminescense151617. The general formula of double molybdates is MLn(MoO 4 ) 2 , where M is a monovalent alkalication (Li–Cs).…”