Cathodoluminescence and photoluminescence of BaTa2O6:Sm3+ phosphor depending on the sintering temperature

Boron doping effect on the structural, spectral properties and charge transfer mechanism of orthorhombic tungsten bronze β-SrTa2O6:Eu3+ phosphor

“…Similar behavior has been observed in Sm 3+ doped BaTa 2 O 6 phosphor, where grain growth with increasing sintering temperature leads to an increase in short components. 5 Although this requires further observation, it shows that grain growth may be related to the increase of Eu 3+ luminescence centers on grain surfaces and a decrease in crystal eld symmetry. The quantum efficiency (h QE ) of 5 D 0 level can be found from the ratio of the average (observed) lifetime (s) to the radiative lifetime (s r ) by eqn (8):…”

“…Also, the octahedral Ta sites with small and highly charged ions have 6 CN. [4][5][6][7] The Eu 3+ ions (r = 1.12 Å, for CN 9) will be suitable for the A and B sites with 15 and 12 CN, respectively. Tungsten bronze symmetry at high concentrations may persist despite of some change occurring in the lattice, which can be attributed to the superiority of TB for RE 3+ doping.…”

“…Tungsten bronze symmetry at high concentrations may persist despite of some change occurring in the lattice, which can be attributed to the superiority of TB for RE 3+ doping. [3][4][5][6][7] In addition, although the b-SrTa 2 O 6 polymorph has preserved its single-phase structure, it is likely to suffer some increase in distortion due to its slightly longer Ta-O bond distances compared to b ′ -SrTa 2 O 6 . X-ray diffractions of SrTa 2 -O 6 :xEu 3+ , yB 3+ (x = 5 mol% Eu 3+ , y = 0, 5, 10, 20 mol% B 3+ ), and SrTa 2 O 6 :xEu 3+ , yB 3+ (x = 0.5, 1.5, 3, 5, 7, 10 mol% Eu 3+ , y = 10 mol% B 3+ ) co-doped samples are shown in Fig.…”

Influence of europium doping on the crystallization, morphology, and the cathodoluminescent properties of PbNb2O6:Eu3+ phosphors

“…Cathodoluminescence (CL) is a method used in the optical characterization resulting from the interaction of the material with an electron beam provided by an electron gun. The CL analysis can be interpreted via spectral lines that are similar to those from other luminescence techniques, and characteristically dominate the spectrum with bound excitonic states and changes from emission lines, donoracceptor double bands, and defect-related properties (11)(12)(13)(14)(15)(16).…”

Effect of Nd3+ Doping on Structural, Near-Infrared, and Cathodoluminescent Properties for Cadmium Tantalate Phosphors

“…The cathodoluminescence (CL) produced in the UVvisible-NIR system of the electromagnetic spectrum is due to the interaction of the material with the electron beam, where optical characterization is performed by means of the cathode rays (fast electrons) provided by an electron gun and the luminescence (light emission) formed. The CL analysis can be interpreted via spectral lines that are similar to those from other luminescence techniques, and characteristically dominate the spectrum with bound excitonic states and changes from emission lines, donor-acceptor double bands, and defect-related properties (23)(24)(25)(26)(27).…”