Effect of rare earth doping on optical and spectroscopic characteristics of BaZrO₃:Eu³⁺,Tb³⁺perovskites

Abstract

This paper reports structural investigations of rare earth doped BaZrO phosphors synthesized by Solid state reaction technique with varying concentrations of Eu and Tb from 0 mol% to 2 mol%. The synthesized phosphors show enhanced variable emissions in the visible region corresponding to different hypersensitive electronic transitions of Eu and Tb ions. With cubic structure confirmed in XRD analysis, the FESEM images show uniform grain connectivity and homogeneity of prepared samples. The TEM micrographs of the synthesized phosphors show agglomerated irregular structures. The synthesized phosphors were also subjected to FTIR, Raman, EDXS analysis along with studies of thermoluminescent and photoluminescent characteristics. On subjecting to 229 nm (UV) excitation, the phosphors show enhanced PL emissions corresponding to 571 nm (D-F), 591 nm (D-F), 615 nm (D-F) and 678 nm (D-F) hypersensitive transitions of Eu ions and emission peaks at 489 nm (D-F), 539 nm (D-F), 589 nm (D-F) and 632 nm (D-F) accounting for electronic transitions of Tb ions respectively. The computed average PL lifetime is 14.014 s. In the TL analysis, the second order of kinetics with the activation energy varying from 5.0 × 10 eV to 6.6 × 10 eV is reported. The maximum TL lifetime is estimated as 19.4985 min in the TL lifetime analysis.

Color‐Tunable Eu3+ and Tb3+ Co‐Doped Nanophosphors Synthesis by Plasma‐Assisted Method

“…With the Tb doping, the main peak at 378 cm ‐1 is slightly suppressed. Meanwhile, a distinguishable broad peak of very weak signal appears in the range of 800‐1000 cm ‐1 , which is well‐known as the torsional stretching of the Tb‐O bond . Similarly, the Raman spectra of the Eu 3+ doped/co‐doped samples also show characteristic peaks of the Y 2 O 3 cubic structure.…”

Visible Light‐Driven N–F‐Codoped TiO2 for Photocatalysts as Potential Application to Wastewater Treatment

“…Supporting Information for this article can be found under DOI: 1https://doi.org/10.1002/ceat.202200388. This section includes additional references to primary literature relevant for this research [48][49][50][51][52].…”