Photoluminescence Investigation of Tb Doped Yb2O3 Phosphors Produced by Precipitation Method

Year 2021, Volume: 25 Issue: 4, 1031 - 1036, 30.08.2021

Fatma Unal

https://doi.org/10.16984/saufenbilder.895402

Abstract

Un-doped and Tb doped ytterbium oxide (Yb₂O₃:Tb³⁺) particles with different dopant rates (2, 4, 6 and 8 at. %) were produced by precipitation method, subsequently by calcination at 1000 °C for 2 h. The crystal structure of all the particles had cubic Yb₂O₃ structure. The presence of Tb ion in Yb₂O₃ host structure has been proven from the XRD results. The crystal structure expanded compared to un-doped Yb₂O₃ particles with the dopant addition confirming lattice parameter (LP) values. LP and crystallite size (CS) values were in the range of 10.428 – 10.596 Å and 16 – 25 nm, respectively. Only one sharp peak was observed at 506 nm corresponding to ⁵D₄ – ⁷F₆ transition (green emission) from photoluminescence (PL) spectra of the phosphor particles. The PL emission intensities were strongly dependent on both CS and dopant rate. However, the dopant rate was more effective on the PL intensity than the CS.

Keywords

Terbium doped ytterbium oxide phosphors, photoluminescence emission, precipitation method, Williamson-Hall analysis

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